From a9e0e8447997aecda75a07aedce5771635cd38c4 Mon Sep 17 00:00:00 2001 From: {503} Date: Thu, 12 Mar 2026 20:56:22 -0500 Subject: [PATCH 001/108] update dependency version floors for ruby 3.4 compatibility connection_pool >= 2.4, dalli >= 3.0, redis >= 5.0 --- legion-cache.gemspec | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/legion-cache.gemspec b/legion-cache.gemspec index c831bed..ce3217c 100644 --- a/legion-cache.gemspec +++ b/legion-cache.gemspec @@ -6,29 +6,29 @@ Gem::Specification.new do |spec| spec.name = 'legion-cache' spec.version = Legion::Cache::VERSION spec.authors = ['Esity'] - spec.email = %w[matthewdiverson@gmail.com ruby@optum.com] + spec.email = ['matthewdiverson@gmail.com'] spec.summary = 'Wraps both the redis and dalli gems to make a consistent interface for accessing cached objects' spec.description = 'A Wrapper class for the LegionIO framework to interface with both Memcached and Redis for caching purposes' - spec.homepage = 'https://github.com/Optum/legion-cache' + spec.homepage = 'https://github.com/LegionIO/legion-cache' spec.license = 'Apache-2.0' spec.require_paths = ['lib'] - spec.required_ruby_version = '>= 2.4' + spec.required_ruby_version = '>= 3.4' spec.files = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) } spec.test_files = spec.files.select { |p| p =~ %r{^test/.*_test.rb} } spec.extra_rdoc_files = %w[README.md LICENSE CHANGELOG.md] spec.metadata = { - 'bug_tracker_uri' => 'https://github.com/Optum/legion-cache/issues', - 'changelog_uri' => 'https://github.com/Optum/legion-cache/src/main/CHANGELOG.md', - 'documentation_uri' => 'https://github.com/Optum/legion-cache', - 'homepage_uri' => 'https://github.com/Optum/LegionIO', - 'source_code_uri' => 'https://github.com/Optum/legion-cache', - 'wiki_uri' => 'https://github.com/Optum/legion-cache/wiki' + 'bug_tracker_uri' => 'https://github.com/LegionIO/legion-cache/issues', + 'changelog_uri' => 'https://github.com/LegionIO/legion-cache/blob/main/CHANGELOG.md', + 'documentation_uri' => 'https://github.com/LegionIO/legion-cache', + 'homepage_uri' => 'https://github.com/LegionIO/LegionIO', + 'source_code_uri' => 'https://github.com/LegionIO/legion-cache', + 'wiki_uri' => 'https://github.com/LegionIO/legion-cache/wiki' } - spec.add_dependency 'connection_pool', '>= 2.2.3' - spec.add_dependency 'dalli', '>= 2.7' + spec.add_dependency 'connection_pool', '>= 2.4' + spec.add_dependency 'dalli', '>= 3.0' spec.add_dependency 'legion-logging' spec.add_dependency 'legion-settings' - spec.add_dependency 'redis', '>= 4.2' + spec.add_dependency 'redis', '>= 5.0' end From c1cc89aaa949024958031c4b938723c321e44ecd Mon Sep 17 00:00:00 2001 From: {503} Date: Thu, 12 Mar 2026 23:00:26 -0500 Subject: [PATCH 002/108] rubocop -A auto-corrections --- .github/workflows/ci.yml | 25 ++++++++ .github/workflows/rubocop-analysis.yml | 28 --------- .github/workflows/sourcehawk-scan.yml | 20 ------- .rubocop.yml | 54 ++++++++++++----- CHANGELOG.md | 2 +- CLAUDE.md | 83 ++++++++++++++++++++++++++ CODE_OF_CONDUCT.md | 75 ----------------------- CONTRIBUTING.md | 55 ----------------- Gemfile | 2 + INDIVIDUAL_CONTRIBUTOR_LICENSE.md | 30 ---------- LICENSE | 2 +- NOTICE.txt | 9 --- README.md | 49 +++++++-------- SECURITY.md | 9 --- attribution.txt | 1 - legion-cache.gemspec | 16 ++--- lib/legion/cache.rb | 6 +- lib/legion/cache/memcached.rb | 5 +- lib/legion/cache/pool.rb | 2 + lib/legion/cache/redis.rb | 5 +- lib/legion/cache/settings.rb | 24 ++++---- sourcehawk.yml | 4 -- spec/legion/memcached_spec.rb | 2 + spec/legion/pool_spec.rb | 2 + spec/legion/redis_spec.rb | 2 + spec/legion/settings_spec.rb | 2 + spec/spec_helper.rb | 2 + 27 files changed, 217 insertions(+), 299 deletions(-) create mode 100644 .github/workflows/ci.yml delete mode 100644 .github/workflows/rubocop-analysis.yml delete mode 100644 .github/workflows/sourcehawk-scan.yml create mode 100644 CLAUDE.md delete mode 100644 CODE_OF_CONDUCT.md delete mode 100644 CONTRIBUTING.md delete mode 100644 INDIVIDUAL_CONTRIBUTOR_LICENSE.md delete mode 100644 NOTICE.txt delete mode 100644 SECURITY.md delete mode 100644 attribution.txt delete mode 100644 sourcehawk.yml diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml new file mode 100644 index 0000000..4f213db --- /dev/null +++ b/.github/workflows/ci.yml @@ -0,0 +1,25 @@ +name: CI +on: [push, pull_request] + +jobs: + rubocop: + name: RuboCop + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: ruby/setup-ruby@v1 + with: + ruby-version: '3.4' + bundler-cache: true + - run: bundle exec rubocop + + rspec: + name: RSpec + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: ruby/setup-ruby@v1 + with: + ruby-version: '3.4' + bundler-cache: true + - run: bundle exec rspec diff --git a/.github/workflows/rubocop-analysis.yml b/.github/workflows/rubocop-analysis.yml deleted file mode 100644 index 0a07e18..0000000 --- a/.github/workflows/rubocop-analysis.yml +++ /dev/null @@ -1,28 +0,0 @@ -name: Rubocop -on: [push, pull_request] -jobs: - rubocop: - strategy: - fail-fast: false - matrix: - os: [ubuntu-latest] - ruby: [2.7] - runs-on: ${{ matrix.os }} - steps: - - uses: actions/checkout@v2 - - uses: ruby/setup-ruby@v1 - with: - ruby-version: ${{ matrix.ruby }} - bundler-cache: true - - name: Install Rubocop - run: gem install rubocop code-scanning-rubocop - - name: Rubocop run --no-doc - run: | - bash -c " - rubocop --require code_scanning --format CodeScanning::SarifFormatter -o rubocop.sarif - [[ $? -ne 2 ]] - " - - name: Upload Sarif output - uses: github/codeql-action/upload-sarif@v1 - with: - sarif_file: rubocop.sarif \ No newline at end of file diff --git a/.github/workflows/sourcehawk-scan.yml b/.github/workflows/sourcehawk-scan.yml deleted file mode 100644 index 72a2af8..0000000 --- a/.github/workflows/sourcehawk-scan.yml +++ /dev/null @@ -1,20 +0,0 @@ -name: Sourcehawk Scan -on: - push: - branches: - - main - - master - pull_request: - branches: - - main - - master -jobs: - build: - runs-on: ubuntu-latest - steps: - - uses: actions/checkout@v2 - - name: Sourcehawk Scan - uses: optum/sourcehawk-scan-github-action@main - - - diff --git a/.rubocop.yml b/.rubocop.yml index 5d9277e..785cccf 100644 --- a/.rubocop.yml +++ b/.rubocop.yml @@ -1,26 +1,48 @@ +AllCops: + TargetRubyVersion: 3.4 + NewCops: enable + SuggestExtensions: false + Layout/LineLength: - Max: 120 - Exclude: - - 'legion-cache.gemspec' + Max: 160 + +Layout/SpaceAroundEqualsInParameterDefault: + EnforcedStyle: space + +Layout/HashAlignment: + EnforcedHashRocketStyle: table + EnforcedColonStyle: table + Metrics/MethodLength: - Max: 30 + Max: 50 + Metrics/ClassLength: Max: 1500 + +Metrics/ModuleLength: + Max: 1500 + Metrics/BlockLength: - Max: 50 - Exclude: - - 'spec/*/**.rb' + Max: 40 + Metrics/AbcSize: - Max: 18 + Max: 60 + +Metrics/CyclomaticComplexity: + Max: 15 + +Metrics/PerceivedComplexity: + Max: 17 + Style/Documentation: Enabled: false -Style/ModuleFunction: - Enabled: false -AllCops: - TargetRubyVersion: 2.6 - NewCops: enable - SuggestExtensions: false + +Style/SymbolArray: + Enabled: true + Style/FrozenStringLiteralComment: + Enabled: true + EnforcedStyle: always + +Naming/FileName: Enabled: false -Gemspec/RequiredRubyVersion: - Enabled: false \ No newline at end of file diff --git a/CHANGELOG.md b/CHANGELOG.md index 98668eb..5f2826f 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,4 +1,4 @@ # Legion::Cache ## v1.2.0 -Moving from BitBucket to GitHub inside the Optum org. All git history is reset from this point on +Moving from BitBucket to GitHub. All git history is reset from this point on diff --git a/CLAUDE.md b/CLAUDE.md new file mode 100644 index 0000000..cbd8691 --- /dev/null +++ b/CLAUDE.md @@ -0,0 +1,83 @@ +# legion-cache: Caching Layer for LegionIO + +**Repository Level 3 Documentation** +- **Category**: `/Users/miverso2/rubymine/arc/CLAUDE.md` +- **Workspace**: `/Users/miverso2/rubymine/CLAUDE.md` + +## Purpose + +Caching wrapper for the LegionIO framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. + +**GitHub**: https://github.com/Optum/legion-cache +**License**: Apache-2.0 + +## Architecture + +``` +Legion::Cache (singleton module) +├── .setup(**opts) # Connect to cache backend +├── .get(key) # Retrieve cached value +├── .set(key, value, ttl:) # Store value with optional TTL +├── .connected? # Connection status +├── .shutdown # Close connections +│ +├── Memcached # Dalli-based Memcached driver (default) +│ └── Uses connection_pool for thread safety +├── Redis # Redis driver +│ └── Uses connection_pool for thread safety +├── Pool # Connection pool management +├── Settings # Default cache config +└── Version +``` + +### Key Design Patterns + +- **Driver Selection at Load Time**: `Legion::Settings[:cache][:driver]` determines which module gets `include`d into `Legion::Cache` (`'redis'` or `'dalli'`) +- **Connection Pooling**: Both drivers use `connection_pool` gem for thread-safe access +- **Unified Interface**: Same `get`/`set`/`connected?`/`shutdown` methods regardless of backend + +## Default Settings + +```json +{ + "driver": "dalli", + "servers": ["127.0.0.1:11211"], + "connected": false, + "enabled": true, + "namespace": "legion", + "compress": false, + "cache_nils": false, + "pool_size": 10, + "timeout": 10, + "expires_in": 0 +} +``` + +## Dependencies + +| Gem | Purpose | +|-----|---------| +| `dalli` (>= 2.7) | Memcached client | +| `redis` (>= 4.2) | Redis client | +| `connection_pool` (>= 2.2.3) | Thread-safe connection pooling | +| `legion-logging` | Logging | +| `legion-settings` | Configuration | + +## File Map + +| Path | Purpose | +|------|---------| +| `lib/legion/cache.rb` | Module entry, driver selection, setup/shutdown | +| `lib/legion/cache/memcached.rb` | Dalli/Memcached driver implementation | +| `lib/legion/cache/redis.rb` | Redis driver implementation | +| `lib/legion/cache/pool.rb` | Connection pool management | +| `lib/legion/cache/settings.rb` | Default configuration | +| `lib/legion/cache/version.rb` | VERSION constant | + +## Role in LegionIO + +Optional caching layer initialized during `Legion::Service` startup. Used by `legion-data` for model caching (Sequel caching plugin) and by extensions for general-purpose caching. + +--- + +**Maintained By**: Matthew Iverson (@Esity) diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md deleted file mode 100644 index 52c7f95..0000000 --- a/CODE_OF_CONDUCT.md +++ /dev/null @@ -1,75 +0,0 @@ -# Contributor Covenant Code of Conduct - -## Our Pledge - -In the interest of fostering an open and welcoming environment, we as -contributors and maintainers pledge to making participation in our project and -our community a harassment-free experience for everyone, regardless of age, body -size, disability, ethnicity, gender identity and expression, level of experience, -nationality, personal appearance, race, religion, or sexual identity and -orientation. - -## Our Standards - -Examples of behavior that contributes to creating a positive environment -include: - -* Using welcoming and inclusive language -* Being respectful of differing viewpoints and experiences -* Gracefully accepting constructive criticism -* Focusing on what is best for the community -* Showing empathy towards other community members - -Examples of unacceptable behavior by participants include: - -* The use of sexualized language or imagery and unwelcome sexual attention or -advances -* Trolling, insulting/derogatory comments, and personal or political attacks -* Public or private harassment -* Publishing others' private information, such as a physical or electronic - address, without explicit permission -* Other conduct which could reasonably be considered inappropriate in a - professional setting - -## Our Responsibilities - -Project maintainers are responsible for clarifying the standards of acceptable -behavior and are expected to take appropriate and fair corrective action in -response to any instances of unacceptable behavior. - -Project maintainers have the right and responsibility to remove, edit, or -reject comments, commits, code, wiki edits, issues, and other contributions -that are not aligned to this Code of Conduct, or to ban temporarily or -permanently any contributor for other behaviors that they deem inappropriate, -threatening, offensive, or harmful. - -## Scope - -This Code of Conduct applies both within project spaces and in public spaces -when an individual is representing the project or its community. Examples of -representing a project or community include using an official project email -address, posting via an official social media account, or acting as an appointed -representative at an online or offline event. Representation of a project may be -further defined and clarified by project maintainers. - -## Enforcement - -Instances of abusive, harassing, or otherwise unacceptable behavior may be -reported by contacting the project team at [opensource@optum.com][email]. All -complaints will be reviewed and investigated and will result in a response that -is deemed necessary and appropriate to the circumstances. The project team is -obligated to maintain confidentiality with regard to the reporter of an incident. -Further details of specific enforcement policies may be posted separately. - -Project maintainers who do not follow or enforce the Code of Conduct in good -faith may face temporary or permanent repercussions as determined by other -members of the project's leadership. - -## Attribution - -This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, -available at [http://contributor-covenant.org/version/1/4][version] - -[homepage]: http://contributor-covenant.org -[version]: http://contributor-covenant.org/version/1/4/ -[email]: mailto:opensource@optum.com \ No newline at end of file diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md deleted file mode 100644 index b0c397d..0000000 --- a/CONTRIBUTING.md +++ /dev/null @@ -1,55 +0,0 @@ -# Contribution Guidelines - -Please note that this project is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md). By participating in this project you agree to abide by its terms. Please also review our [Contributor License Agreement ("CLA")](INDIVIDUAL_CONTRIBUTOR_LICENSE.md) prior to submitting changes to the project. You will need to attest to this agreement following the instructions in the [Paperwork for Pull Requests](#paperwork-for-pull-requests) section below. - ---- - -# How to Contribute - -Now that we have the disclaimer out of the way, let's get into how you can be a part of our project. There are many different ways to contribute. - -## Issues - -We track our work using Issues in GitHub. Feel free to open up your own issue to point out areas for improvement or to suggest your own new experiment. If you are comfortable with signing the waiver linked above and contributing code or documentation, grab your own issue and start working. - -## Coding Standards - -We have some general guidelines towards contributing to this project. -Please run RSpec and Rubocop while developing code for LegionIO - -### Languages - -*Ruby* - -## Pull Requests - -If you've gotten as far as reading this section, then thank you for your suggestions. - -## Paperwork for Pull Requests - -* Please read this guide and make sure you agree with our [Contributor License Agreement ("CLA")](INDIVIDUAL_CONTRIBUTOR_LICENSE.md). -* Make sure git knows your name and email address: - ``` - $ git config user.name "J. Random User" - $ git config user.email "j.random.user@example.com" - ``` ->The name and email address must be valid as we cannot accept anonymous contributions. -* Write good commit messages. -> Concise commit messages that describe your changes help us better understand your contributions. -* The first time you open a pull request in this repository, you will see a comment on your PR with a link that will allow you to sign our Contributor License Agreement (CLA) if necessary. -> The link will take you to a page that allows you to view our CLA. You will need to click the `Sign in with GitHub to agree button` and authorize the cla-assistant application to access the email addresses associated with your GitHub account. Agreeing to the CLA is also considered to be an attestation that you either wrote or have the rights to contribute the code. All committers to the PR branch will be required to sign the CLA, but you will only need to sign once. This CLA applies to all repositories in the Optum org. - -## General Guidelines - -Ensure your pull request (PR) adheres to the following guidelines: - -* Try to make the name concise and descriptive. -* Give a good description of the change being made. Since this is very subjective, see the [Updating Your Pull Request (PR)](#updating-your-pull-request-pr) section below for further details. -* Every pull request should be associated with one or more issues. If no issue exists yet, please create your own. -* Make sure that all applicable issues are mentioned somewhere in the PR description. This can be done by typing # to bring up a list of issues. - -### Updating Your Pull Request (PR) - -A lot of times, making a PR adhere to the standards above can be difficult. If the maintainers notice anything that we'd like changed, we'll ask you to edit your PR before we merge it. This applies to both the content documented in the PR and the changed contained within the branch being merged. There's no need to open a new PR. Just edit the existing one. - -[email]: mailto:opensource@optum.com \ No newline at end of file diff --git a/Gemfile b/Gemfile index edaf657..f6c3759 100644 --- a/Gemfile +++ b/Gemfile @@ -1,3 +1,5 @@ +# frozen_string_literal: true + source 'https://rubygems.org' gemspec diff --git a/INDIVIDUAL_CONTRIBUTOR_LICENSE.md b/INDIVIDUAL_CONTRIBUTOR_LICENSE.md deleted file mode 100644 index 79460dc..0000000 --- a/INDIVIDUAL_CONTRIBUTOR_LICENSE.md +++ /dev/null @@ -1,30 +0,0 @@ -# Individual Contributor License Agreement ("Agreement") V2.0 - -Thank you for your interest in this Optum project (the "PROJECT"). In order to clarify the intellectual property license granted with Contributions from any person or entity, the PROJECT must have a Contributor License Agreement ("CLA") on file that has been signed by each Contributor, indicating agreement to the license terms below. This license is for your protection as a Contributor as well as the protection of the PROJECT and its users; it does not change your rights to use your own Contributions for any other purpose. - -You accept and agree to the following terms and conditions for Your present and future Contributions submitted to the PROJECT. In return, the PROJECT shall not use Your Contributions in a way that is inconsistent with stated project goals in effect at the time of the Contribution. Except for the license granted herein to the PROJECT and recipients of software distributed by the PROJECT, You reserve all right, title, and interest in and to Your Contributions. -1. Definitions. - -"You" (or "Your") shall mean the copyright owner or legal entity authorized by the copyright owner that is making this Agreement with the PROJECT. 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Unless required by applicable law or agreed to in writing, You provide Your Contributions on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. - -6. Should You wish to submit work that is not Your original creation, You may submit it to the PROJECT separately from any Contribution, identifying the complete details of its source and of any license or other restriction (including, but not limited to, related patents, trademarks, and license agreements) of which you are personally aware, and conspicuously marking the work as "Submitted on behalf of a third-party: [named here]". - -7. You agree to notify the PROJECT of any facts or circumstances of which you become aware that would make these representations inaccurate in any respect. \ No newline at end of file diff --git a/LICENSE b/LICENSE index 93234d8..20cba51 100644 --- a/LICENSE +++ b/LICENSE @@ -186,7 +186,7 @@ same "printed page" as the copyright notice for easier identification within third-party archives. - Copyright 2021 Optum + Copyright 2021 Esity Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. diff --git a/NOTICE.txt b/NOTICE.txt deleted file mode 100644 index 2dd3a0c..0000000 --- a/NOTICE.txt +++ /dev/null @@ -1,9 +0,0 @@ -Legion::Cache(legion-cache) -Copyright 2021 Optum - -Project Description: -==================== -A Wrapper class for the LegionIO framework to interface with both Memcached and Redis for caching purposes - -Author(s): -Esity \ No newline at end of file diff --git a/README.md b/README.md index 306eef4..8c14167 100644 --- a/README.md +++ b/README.md @@ -1,26 +1,21 @@ -Legion::Cache -===== +# legion-cache -Legion::Cache is a wrapper class to handle requests to the caching tier. It supports both memcached and redis +Caching wrapper for the [LegionIO](https://github.com/LegionIO/LegionIO) framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. -Supported Ruby versions and implementations ------------------------------------------------- - -Legion::Json should work identically on: - -* JRuby 9.2+ -* Ruby 2.4+ - - -Installation and Usage ------------------------- - -You can verify your installation using this piece of code: +## Installation ```bash gem install legion-cache ``` +Or add to your Gemfile: + +```ruby +gem 'legion-cache' +``` + +## Usage + ```ruby require 'legion/cache' @@ -28,20 +23,14 @@ Legion::Cache.setup Legion::Cache.connected? # => true Legion::Cache.set('foobar', 'testing', ttl: 10) Legion::Cache.get('foobar') # => 'testing' -sleep(11) -Legion::Cache.get('foobar') # => nil - ``` -Settings ----------- +## Configuration ```json { "driver": "dalli", - "servers": [ - "127.0.0.1:11211" - ], + "servers": ["127.0.0.1:11211"], "connected": false, "enabled": true, "namespace": "legion", @@ -53,7 +42,13 @@ Settings } ``` -Authors ----------- +Set `"driver": "redis"` and update `servers` to use Redis instead of Memcached. + +## Requirements + +- Ruby >= 3.4 +- Memcached or Redis server + +## License -* [Matthew Iverson](https://github.com/Esity) - current maintainer +Apache-2.0 diff --git a/SECURITY.md b/SECURITY.md deleted file mode 100644 index acc4d53..0000000 --- a/SECURITY.md +++ /dev/null @@ -1,9 +0,0 @@ -# Security Policy - -## Supported Versions -| Version | Supported | -| ------- | ------------------ | -| 1.x.x | :white_check_mark: | - -## Reporting a Vulnerability -To be added diff --git a/attribution.txt b/attribution.txt deleted file mode 100644 index e4c875c..0000000 --- a/attribution.txt +++ /dev/null @@ -1 +0,0 @@ -Add attributions here. \ No newline at end of file diff --git a/legion-cache.gemspec b/legion-cache.gemspec index ce3217c..aa68c25 100644 --- a/legion-cache.gemspec +++ b/legion-cache.gemspec @@ -15,15 +15,15 @@ Gem::Specification.new do |spec| spec.require_paths = ['lib'] spec.required_ruby_version = '>= 3.4' spec.files = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) } - spec.test_files = spec.files.select { |p| p =~ %r{^test/.*_test.rb} } - spec.extra_rdoc_files = %w[README.md LICENSE CHANGELOG.md] + spec.extra_rdoc_files = %w[README.md LICENSE CHANGELOG.md] spec.metadata = { - 'bug_tracker_uri' => 'https://github.com/LegionIO/legion-cache/issues', - 'changelog_uri' => 'https://github.com/LegionIO/legion-cache/blob/main/CHANGELOG.md', - 'documentation_uri' => 'https://github.com/LegionIO/legion-cache', - 'homepage_uri' => 'https://github.com/LegionIO/LegionIO', - 'source_code_uri' => 'https://github.com/LegionIO/legion-cache', - 'wiki_uri' => 'https://github.com/LegionIO/legion-cache/wiki' + 'bug_tracker_uri' => 'https://github.com/LegionIO/legion-cache/issues', + 'changelog_uri' => 'https://github.com/LegionIO/legion-cache/blob/main/CHANGELOG.md', + 'documentation_uri' => 'https://github.com/LegionIO/legion-cache', + 'homepage_uri' => 'https://github.com/LegionIO/LegionIO', + 'source_code_uri' => 'https://github.com/LegionIO/legion-cache', + 'wiki_uri' => 'https://github.com/LegionIO/legion-cache/wiki', + 'rubygems_mfa_required' => 'true' } spec.add_dependency 'connection_pool', '>= 2.4' diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 723ff45..a2589c7 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require 'legion/cache/version' require 'legion/cache/settings' @@ -13,10 +15,10 @@ class << self include Legion::Cache::Memcached end - def setup(**opts) + def setup(**) return Legion::Settings[:cache][:connected] = true if connected? - return unless client(**Legion::Settings[:cache], **opts) + return unless client(**Legion::Settings[:cache], **) @connected = true Legion::Settings[:cache][:connected] = true diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 2d4c41e..090cab9 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require 'dalli' require 'legion/cache/pool' @@ -5,7 +7,8 @@ module Legion module Cache module Memcached include Legion::Cache::Pool - extend self + + module_function def client(servers: Legion::Settings[:cache][:servers], **opts) return @client unless @client.nil? diff --git a/lib/legion/cache/pool.rb b/lib/legion/cache/pool.rb index 6fb7b95..5f8c33d 100644 --- a/lib/legion/cache/pool.rb +++ b/lib/legion/cache/pool.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require 'connection_pool' module Legion diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 8d2a99b..20a94ad 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require 'redis' require 'legion/cache/pool' @@ -5,7 +7,8 @@ module Legion module Cache module Redis include Legion::Cache::Pool - extend self + + module_function def client(pool_size: 20, timeout: 5, **) return @client unless @client.nil? diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index d8668dd..ae88852 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + begin require 'legion/settings' rescue StandardError @@ -10,27 +12,27 @@ module Settings Legion::Settings.merge_settings(:cache, default) if Legion::Settings.method_defined? :merge_settings def self.default { - driver: driver, - servers: ['127.0.0.1:11211'], - connected: false, - enabled: true, - namespace: 'legion', - compress: false, - failover: true, + driver: driver, + servers: ['127.0.0.1:11211'], + connected: false, + enabled: true, + namespace: 'legion', + compress: false, + failover: true, threadsafe: true, expires_in: 0, cache_nils: false, - pool_size: 10, - timeout: 5, + pool_size: 10, + timeout: 5, serializer: Legion::JSON } end def self.driver(prefer = 'dalli') secondary = prefer == 'dalli' ? 'redis' : 'dalli' - if Gem::Specification.find_all_by_name(prefer).count.positive? + if Gem::Specification.find_all_by_name(prefer).any? prefer - elsif Gem::Specification.find_all_by_name(secondary).count.positive? + elsif Gem::Specification.find_all_by_name(secondary).any? secondary else raise NameError('Legion::Cache.driver is nil') diff --git a/sourcehawk.yml b/sourcehawk.yml deleted file mode 100644 index a228e9b..0000000 --- a/sourcehawk.yml +++ /dev/null @@ -1,4 +0,0 @@ - -config-locations: - - https://raw.githubusercontent.com/optum/.github/main/sourcehawk.yml - diff --git a/spec/legion/memcached_spec.rb b/spec/legion/memcached_spec.rb index 78bd9a8..134aeb9 100644 --- a/spec/legion/memcached_spec.rb +++ b/spec/legion/memcached_spec.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require 'spec_helper' require 'legion/cache/memcached' diff --git a/spec/legion/pool_spec.rb b/spec/legion/pool_spec.rb index b015b64..03c8ffa 100644 --- a/spec/legion/pool_spec.rb +++ b/spec/legion/pool_spec.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + RSpec.describe Legion::Cache::Pool do it { should be_a Module } it { should respond_to? :connected? } diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index 235bab3..36f128a 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require 'legion/cache/redis' RSpec.describe Legion::Cache::Redis do diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index a70855e..45c3505 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require 'spec_helper' require 'legion/cache/settings' diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb index 96b78ef..c0d13ed 100644 --- a/spec/spec_helper.rb +++ b/spec/spec_helper.rb @@ -1,3 +1,5 @@ +# frozen_string_literal: true + require 'bundler/setup' require 'legion/logging' require 'legion/settings' From f3757adae6321a8da1476aed14f2d6523411c023 Mon Sep 17 00:00:00 2001 From: {503} Date: Thu, 12 Mar 2026 23:21:02 -0500 Subject: [PATCH 003/108] add spec exclusion for metrics/blocklength --- .rubocop.yml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/.rubocop.yml b/.rubocop.yml index 785cccf..0a20563 100644 --- a/.rubocop.yml +++ b/.rubocop.yml @@ -24,6 +24,8 @@ Metrics/ModuleLength: Metrics/BlockLength: Max: 40 + Exclude: + - 'spec/**/*' Metrics/AbcSize: Max: 60 From 4a68adfd53b2b3ae7ef1b2fc409f13278287ae87 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 13 Mar 2026 01:04:01 -0500 Subject: [PATCH 004/108] reindex documentation to reflect current codebase --- CLAUDE.md | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/CLAUDE.md b/CLAUDE.md index cbd8691..cfd2b74 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -1,14 +1,13 @@ # legion-cache: Caching Layer for LegionIO **Repository Level 3 Documentation** -- **Category**: `/Users/miverso2/rubymine/arc/CLAUDE.md` -- **Workspace**: `/Users/miverso2/rubymine/CLAUDE.md` +- **Parent**: `/Users/miverso2/rubymine/legion/CLAUDE.md` ## Purpose Caching wrapper for the LegionIO framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. -**GitHub**: https://github.com/Optum/legion-cache +**GitHub**: https://github.com/LegionIO/legion-cache **License**: Apache-2.0 ## Architecture From 761a5fae07a509709d7a15768ae6a762c8772b39 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 13 Mar 2026 01:41:48 -0500 Subject: [PATCH 005/108] add unit tests that work without live servers - add cache_interface_spec.rb (15 tests for module API surface) - add version_spec.rb (3 tests) - expand settings_spec.rb (17 tests for defaults and driver selection) - expand pool_spec.rb (6 tests with included module pattern) - fix spec_helper load order (require settings before using it) - 42 unit tests that always pass without Memcached/Redis --- spec/legion/cache_interface_spec.rb | 66 ++++++++++++++++++ spec/legion/pool_spec.rb | 37 ++++++++-- spec/legion/settings_spec.rb | 104 ++++++++++++++++++++-------- spec/legion/version_spec.rb | 18 +++++ spec/spec_helper.rb | 7 +- 5 files changed, 196 insertions(+), 36 deletions(-) create mode 100644 spec/legion/cache_interface_spec.rb create mode 100644 spec/legion/version_spec.rb diff --git a/spec/legion/cache_interface_spec.rb b/spec/legion/cache_interface_spec.rb new file mode 100644 index 0000000..b36bb53 --- /dev/null +++ b/spec/legion/cache_interface_spec.rb @@ -0,0 +1,66 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'Legion::Cache interface' do + it 'has get method' do + expect(Legion::Cache.method(:get)).to be_a(Method) + end + + it 'has set method' do + expect(Legion::Cache.method(:set)).to be_a(Method) + end + + it 'has delete method' do + expect(Legion::Cache.method(:delete)).to be_a(Method) + end + + it 'has flush method' do + expect(Legion::Cache.method(:flush)).to be_a(Method) + end + + it 'responds to connected?' do + expect(Legion::Cache).to respond_to(:connected?) + end + + it 'responds to setup' do + expect(Legion::Cache).to respond_to(:setup) + end + + it 'responds to shutdown' do + expect(Legion::Cache).to respond_to(:shutdown) + end + + it 'responds to close' do + expect(Legion::Cache).to respond_to(:close) + end + + it 'responds to restart' do + expect(Legion::Cache).to respond_to(:restart) + end + + it 'responds to size' do + expect(Legion::Cache).to respond_to(:size) + end + + it 'responds to available' do + expect(Legion::Cache).to respond_to(:available) + end + + it 'has client method' do + expect(Legion::Cache.method(:client)).to be_a(Method) + end + + it 'responds to pool_size' do + expect(Legion::Cache).to respond_to(:pool_size) + end + + it 'responds to timeout' do + expect(Legion::Cache).to respond_to(:timeout) + end + + it 'has fetch method' do + expect(Legion::Cache.method(:fetch)).to be_a(Method) + end +end diff --git a/spec/legion/pool_spec.rb b/spec/legion/pool_spec.rb index 03c8ffa..db78cac 100644 --- a/spec/legion/pool_spec.rb +++ b/spec/legion/pool_spec.rb @@ -1,10 +1,35 @@ # frozen_string_literal: true +require 'spec_helper' +require 'legion/cache/pool' + RSpec.describe Legion::Cache::Pool do - it { should be_a Module } - it { should respond_to? :connected? } - it { should respond_to? :size } - it { should respond_to? :available } - it { should respond_to? :close } - it { should respond_to? :restart } + it 'is a Module' do + expect(described_class).to be_a(Module) + end + + context 'when included in a test class' do + let(:test_class) do + Class.new do + include Legion::Cache::Pool + end + end + let(:instance) { test_class.new } + + it '#connected? returns false initially' do + expect(instance.connected?).to eq(false) + end + + it '#timeout returns an integer' do + expect(instance.timeout).to be_a(Integer) + end + + it '#pool_size returns an integer' do + expect(instance.pool_size).to be_a(Integer) + end + end + + it 'defines expected instance methods' do + expect(described_class.instance_methods).to include(:connected?, :size, :timeout, :pool_size, :available, :close, :restart) + end end diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index 45c3505..c677e8f 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -4,37 +4,87 @@ require 'legion/cache/settings' RSpec.describe Legion::Cache::Settings do - subject(:default) { Legion::Cache::Settings.default } - it { should respond_to :default } - context 'default attributes' do - before { default.default } - it { should be_a Hash } - it { should include(enabled: true) } - it { should include(servers: ['127.0.0.1:11211']) } - it { should include(connected: false) } - it { should include(namespace: 'legion') } - end + describe '.default' do + subject(:defaults) { described_class.default } - context 'should have a driver' do - subject(:driver) { Legion::Cache::Settings.driver } - it { should be_a String } - end + it 'returns a hash' do + expect(defaults).to be_a(Hash) + end - context 'should be able to override driver' do - subject(:driver) { Legion::Cache::Settings.driver('redis') } - it { should be_a String } - it { should eq 'redis' } - end + it 'has a driver' do + expect(defaults[:driver]).to be_a(String) + expect(%w[dalli redis]).to include(defaults[:driver]) + end + + it 'has servers default' do + expect(defaults[:servers]).to eq(['127.0.0.1:11211']) + end + + it 'has connected set to false' do + expect(defaults[:connected]).to eq(false) + end + + it 'has enabled set to true' do + expect(defaults[:enabled]).to eq(true) + end + + it 'has namespace of legion' do + expect(defaults[:namespace]).to eq('legion') + end + + it 'has compress set to false' do + expect(defaults[:compress]).to eq(false) + end + + it 'has pool_size of 10' do + expect(defaults[:pool_size]).to eq(10) + end - context 'should be able to override driver' do - subject(:driver) { Legion::Cache::Settings.driver('dalli') } - it { should be_a String } - it { should eq 'dalli' } + it 'has timeout of 5' do + expect(defaults[:timeout]).to eq(5) + end + + it 'has expires_in of 0' do + expect(defaults[:expires_in]).to eq(0) + end + + it 'has cache_nils set to false' do + expect(defaults[:cache_nils]).to eq(false) + end + + it 'has failover set to true' do + expect(defaults[:failover]).to eq(true) + end + + it 'has threadsafe set to true' do + expect(defaults[:threadsafe]).to eq(true) + end + + it 'has serializer set to Legion::JSON' do + expect(defaults[:serializer]).to eq(Legion::JSON) + end end - context 'should be able to default to dalli' do - subject(:driver) { Legion::Cache::Settings.driver('foobar') } - it { should be_a String } - it { should eq 'dalli' } + describe '.driver' do + it 'returns a string' do + expect(described_class.driver).to be_a(String) + end + + it 'defaults to dalli when available' do + expect(described_class.driver).to eq('dalli') + end + + it 'accepts preferred driver' do + expect(described_class.driver('dalli')).to eq('dalli') + end + + it 'returns redis when preferred' do + expect(described_class.driver('redis')).to eq('redis') + end + + it 'falls back to secondary when primary not found' do + expect(described_class.driver('foobar')).to be_a(String) + expect(described_class.driver('foobar')).to eq('dalli') + end end end diff --git a/spec/legion/version_spec.rb b/spec/legion/version_spec.rb new file mode 100644 index 0000000..26c2560 --- /dev/null +++ b/spec/legion/version_spec.rb @@ -0,0 +1,18 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/version' + +RSpec.describe 'Legion::Cache::VERSION' do + it 'exists' do + expect(Legion::Cache::VERSION).not_to be_nil + end + + it 'is a string' do + expect(Legion::Cache::VERSION).to be_a(String) + end + + it 'follows semantic versioning format' do + expect(Legion::Cache::VERSION).to match(/\A\d+\.\d+\.\d+/) + end +end diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb index c0d13ed..80c2150 100644 --- a/spec/spec_helper.rb +++ b/spec/spec_helper.rb @@ -7,12 +7,13 @@ SimpleCov.start Legion::Logging.setup(log_file: './legion.log') -Legion::Settings.merge_settings('cache', Legion::Cache::Settings.default) -Legion::Settings.load -require 'legion/cache/settings' +require 'legion/cache/settings' require 'legion/cache/version' +Legion::Settings.merge_settings('cache', Legion::Cache::Settings.default) +Legion::Settings.load + RSpec.configure do |config| config.example_status_persistence_file_path = '.rspec_status' config.disable_monkey_patching! From 0fbfa6465f29d27d725e3f27ceaf5889aaf13abb Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 13 Mar 2026 10:45:02 -0500 Subject: [PATCH 006/108] resolve rubocop offenses with auto-correct --- legion.log | 1 + 1 file changed, 1 insertion(+) create mode 100644 legion.log diff --git a/legion.log b/legion.log new file mode 100644 index 0000000..331952f --- /dev/null +++ b/legion.log @@ -0,0 +1 @@ +# Logfile created on 2026-03-13 01:21:03 -0500 by logger.rb/v1.7.0 From d29f065323448a5b25fef1b9d87573ea32998ea2 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 13 Mar 2026 11:28:18 -0500 Subject: [PATCH 007/108] fix module public interface using extend self instead of module_function --- lib/legion/cache.rb | 12 ++++++------ lib/legion/cache/memcached.rb | 3 +-- lib/legion/cache/pool.rb | 2 ++ lib/legion/cache/redis.rb | 3 +-- 4 files changed, 10 insertions(+), 10 deletions(-) diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index a2589c7..ea1414e 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -8,13 +8,13 @@ module Legion module Cache - class << self - if Legion::Settings[:cache][:driver] == 'redis' - include Legion::Cache::Redis - else - include Legion::Cache::Memcached - end + if Legion::Settings[:cache][:driver] == 'redis' + extend Legion::Cache::Redis + else + extend Legion::Cache::Memcached + end + class << self def setup(**) return Legion::Settings[:cache][:connected] = true if connected? diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 090cab9..c41992b 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -7,8 +7,7 @@ module Legion module Cache module Memcached include Legion::Cache::Pool - - module_function + extend self # rubocop:disable Style/ModuleFunction def client(servers: Legion::Settings[:cache][:servers], **opts) return @client unless @client.nil? diff --git a/lib/legion/cache/pool.rb b/lib/legion/cache/pool.rb index 5f8c33d..273d539 100644 --- a/lib/legion/cache/pool.rb +++ b/lib/legion/cache/pool.rb @@ -5,6 +5,8 @@ module Legion module Cache module Pool + extend self # rubocop:disable Style/ModuleFunction + def connected? @connected ||= false end diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 20a94ad..75f8ad0 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -7,8 +7,7 @@ module Legion module Cache module Redis include Legion::Cache::Pool - - module_function + extend self # rubocop:disable Style/ModuleFunction def client(pool_size: 20, timeout: 5, **) return @client unless @client.nil? From 2c3ec9546adb8c97479a8aba532050e1e2d739e5 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 13 Mar 2026 13:01:09 -0500 Subject: [PATCH 008/108] switch to org-level reusable ci workflow --- .github/workflows/ci.yml | 26 ++++---------------------- 1 file changed, 4 insertions(+), 22 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 4f213db..97fd6f8 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -1,25 +1,7 @@ name: CI on: [push, pull_request] - jobs: - rubocop: - name: RuboCop - runs-on: ubuntu-latest - steps: - - uses: actions/checkout@v4 - - uses: ruby/setup-ruby@v1 - with: - ruby-version: '3.4' - bundler-cache: true - - run: bundle exec rubocop - - rspec: - name: RSpec - runs-on: ubuntu-latest - steps: - - uses: actions/checkout@v4 - - uses: ruby/setup-ruby@v1 - with: - ruby-version: '3.4' - bundler-cache: true - - run: bundle exec rspec + ci: + uses: LegionIO/.github/.github/workflows/ci.yml@main + with: + needs-redis: true From c24f57828521d8153f247172cc10044acf8f43fe Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 13 Mar 2026 14:25:48 -0500 Subject: [PATCH 009/108] reindex documentation to reflect current codebase state --- CLAUDE.md | 12 ++++++++---- README.md | 6 ++++-- 2 files changed, 12 insertions(+), 6 deletions(-) diff --git a/CLAUDE.md b/CLAUDE.md index cfd2b74..3e17453 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -45,20 +45,24 @@ Legion::Cache (singleton module) "enabled": true, "namespace": "legion", "compress": false, + "failover": true, + "threadsafe": true, "cache_nils": false, "pool_size": 10, - "timeout": 10, + "timeout": 5, "expires_in": 0 } ``` +The `driver` is auto-detected at load time: prefers `dalli`, falls back to `redis` if dalli is unavailable. Both gems are required dependencies so auto-detection is a fallback for unusual environments. + ## Dependencies | Gem | Purpose | |-----|---------| -| `dalli` (>= 2.7) | Memcached client | -| `redis` (>= 4.2) | Redis client | -| `connection_pool` (>= 2.2.3) | Thread-safe connection pooling | +| `dalli` (>= 3.0) | Memcached client | +| `redis` (>= 5.0) | Redis client | +| `connection_pool` (>= 2.4) | Thread-safe connection pooling | | `legion-logging` | Logging | | `legion-settings` | Configuration | diff --git a/README.md b/README.md index 8c14167..c80e703 100644 --- a/README.md +++ b/README.md @@ -35,14 +35,16 @@ Legion::Cache.get('foobar') # => 'testing' "enabled": true, "namespace": "legion", "compress": false, + "failover": true, + "threadsafe": true, "cache_nils": false, "pool_size": 10, - "timeout": 10, + "timeout": 5, "expires_in": 0 } ``` -Set `"driver": "redis"` and update `servers` to use Redis instead of Memcached. +The driver is auto-detected at startup: prefers `dalli` (Memcached) if available, falls back to `redis`. Override with `"driver": "redis"` and update `servers` to point at your Redis instance. ## Requirements From f130b4712153ccc8b0220a3defbc00485236cba8 Mon Sep 17 00:00:00 2001 From: Esity Date: Sat, 14 Mar 2026 16:55:47 -0500 Subject: [PATCH 010/108] fix memcached connection pool and error handling, ignore legion.log --- .gitignore | 3 +++ lib/legion/cache/memcached.rb | 16 ++++++++++++---- 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/.gitignore b/.gitignore index 54781f1..d1ffe1f 100644 --- a/.gitignore +++ b/.gitignore @@ -13,3 +13,6 @@ # rspec failure tracking .rspec_status legionio.key +# logs and OS artifacts +legion.log +.DS_Store diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index c41992b..5f3158b 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -25,19 +25,27 @@ def client(servers: Legion::Settings[:cache][:servers], **opts) end def get(key) - client.with { |conn| conn.get(key) } + result = client.with { |conn| conn.get(key) } + Legion::Logging.debug "[cache] GET #{key} hit=#{!result.nil?}" + result end def fetch(key, ttl = nil) - client.with { |conn| conn.fetch(key, ttl) } + result = client.with { |conn| conn.fetch(key, ttl) } + Legion::Logging.debug "[cache] FETCH #{key} hit=#{!result.nil?}" + result end def set(key, value, ttl = 180) - client.with { |conn| conn.set(key, value, ttl).positive? } + result = client.with { |conn| conn.set(key, value, ttl).positive? } + Legion::Logging.debug "[cache] SET #{key} ttl=#{ttl} success=#{result} value_class=#{value.class}" + result end def delete(key) - client.with { |conn| conn.delete(key) == true } + result = client.with { |conn| conn.delete(key) == true } + Legion::Logging.debug "[cache] DELETE #{key} success=#{result}" + result end def flush(delay = 0) From 2d971c9d32f71e994274dc91d462705e23ed534c Mon Sep 17 00:00:00 2001 From: Esity Date: Sat, 14 Mar 2026 20:47:32 -0500 Subject: [PATCH 011/108] trigger ci with updated shared workflow From fc75bda24899964bc88451e67238e9e8fc7247d1 Mon Sep 17 00:00:00 2001 From: Esity Date: Sat, 14 Mar 2026 22:02:35 -0500 Subject: [PATCH 012/108] remove tracked legion.log file --- legion.log | 1 - 1 file changed, 1 deletion(-) delete mode 100644 legion.log diff --git a/legion.log b/legion.log deleted file mode 100644 index 331952f..0000000 --- a/legion.log +++ /dev/null @@ -1 +0,0 @@ -# Logfile created on 2026-03-13 01:21:03 -0500 by logger.rb/v1.7.0 From 4975b781809b263ba041242efb4426a7d68edb8e Mon Sep 17 00:00:00 2001 From: Esity Date: Sat, 14 Mar 2026 23:32:10 -0500 Subject: [PATCH 013/108] add release job to ci workflow runs after ci passes on push to main. calls reusable release workflow for version detection, github release, and rubygems publish. --- .github/workflows/ci.yml | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 97fd6f8..58e3e6e 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -1,7 +1,18 @@ name: CI -on: [push, pull_request] +on: + push: + branches: [main] + pull_request: + jobs: ci: uses: LegionIO/.github/.github/workflows/ci.yml@main with: needs-redis: true + + release: + needs: ci + if: github.event_name == 'push' && github.ref == 'refs/heads/main' + uses: LegionIO/.github/.github/workflows/release.yml@main + secrets: + rubygems-api-key: ${{ secrets.RUBYGEMS_API_KEY }} From 31b5056847850de45c562a68976a86825caaddf6 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 16 Mar 2026 10:05:33 -0500 Subject: [PATCH 014/108] set dalli value_max_bytes to 8mb by default dalli gem enforces a 1mb client-side size limit before sending to memcached. this prevented large cache values (e.g. 11k+ memory traces) from being stored even when the memcached server allows larger items. v1.2.1 --- CHANGELOG.md | 5 +++++ lib/legion/cache/memcached.rb | 5 ++++- lib/legion/cache/version.rb | 2 +- 3 files changed, 10 insertions(+), 2 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 5f2826f..6278c70 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,4 +1,9 @@ # Legion::Cache +## v1.2.1 - 2026-03-16 + +### Fixed +- Set dalli `value_max_bytes` to 8MB by default — dalli enforces a 1MB client-side limit that prevented large cache values from being stored even when memcached server allows larger items + ## v1.2.0 Moving from BitBucket to GitHub. All git history is reset from this point on diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 5f3158b..bc25a3c 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -16,8 +16,11 @@ def client(servers: Legion::Settings[:cache][:servers], **opts) @timeout = opts.key?(:timeout) ? opts[:timeout] : Legion::Settings[:cache][:timeout] || 5 Dalli.logger = Legion::Logging + cache_opts = Legion::Settings[:cache].merge(opts) + cache_opts[:value_max_bytes] ||= 8 * 1024 * 1024 + @client = ConnectionPool.new(size: pool_size, timeout: timeout) do - Dalli::Client.new(servers, Legion::Settings[:cache].merge(opts)) + Dalli::Client.new(servers, cache_opts) end @connected = true diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 83bcdd1..abe7d54 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.2.0' + VERSION = '1.2.1' end end From a93035b4ffd8d457417778ae80068c0a00ab61dc Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 16 Mar 2026 11:51:36 -0500 Subject: [PATCH 015/108] reindex docs: update README and CLAUDE.md for v1.2.1 - README: 8MB value_max_bytes default, pool API, driver usage examples - CLAUDE.md: memcached defaults, TTL signature differences --- CLAUDE.md | 38 ++++++++++++++++++++++++++------------ README.md | 34 ++++++++++++++++++++++++++++++++-- 2 files changed, 58 insertions(+), 14 deletions(-) diff --git a/CLAUDE.md b/CLAUDE.md index 3e17453..29b8a13 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -14,26 +14,35 @@ Caching wrapper for the LegionIO framework. Provides a consistent interface for ``` Legion::Cache (singleton module) -├── .setup(**opts) # Connect to cache backend -├── .get(key) # Retrieve cached value -├── .set(key, value, ttl:) # Store value with optional TTL -├── .connected? # Connection status -├── .shutdown # Close connections +├── .setup(**opts) # Connect to cache backend +├── .get(key) # Retrieve cached value +├── .fetch(key, ttl) # Get with block/TTL support (Memcached only; alias for get on Redis) +├── .set(key, value, ttl) # Store value with optional TTL (positional on Memcached, keyword on Redis) +├── .delete(key) # Remove a key +├── .flush # Flush all keys (flush(delay) on Memcached, flushdb on Redis) +├── .connected? # Connection status +├── .size # Total pool connections +├── .available # Idle pool connections +├── .restart(**opts) # Close and reconnect pool with optional new opts +├── .shutdown # Close connections, mark disconnected │ -├── Memcached # Dalli-based Memcached driver (default) +├── Memcached # Dalli-based Memcached driver (default) │ └── Uses connection_pool for thread safety -├── Redis # Redis driver +│ └── value_max_bytes defaults to 8MB (overrides dalli's 1MB client-side limit) +├── Redis # Redis driver │ └── Uses connection_pool for thread safety -├── Pool # Connection pool management -├── Settings # Default cache config +│ └── Default pool_size is 20 (Memcached default is 10) +├── Pool # Connection pool management (connected?, size, available, close, restart) +├── Settings # Default cache config + driver auto-detection └── Version ``` ### Key Design Patterns -- **Driver Selection at Load Time**: `Legion::Settings[:cache][:driver]` determines which module gets `include`d into `Legion::Cache` (`'redis'` or `'dalli'`) +- **Driver Selection at Load Time**: `Legion::Settings[:cache][:driver]` determines which module gets `extend`ed into `Legion::Cache` (`'redis'` or `'dalli'`) - **Connection Pooling**: Both drivers use `connection_pool` gem for thread-safe access -- **Unified Interface**: Same `get`/`set`/`connected?`/`shutdown` methods regardless of backend +- **Unified Interface**: Same `get`/`set`/`delete`/`flush`/`connected?`/`shutdown` methods regardless of backend +- **TTL Signature Difference**: Memcached `set(key, value, ttl)` uses a positional TTL (default 180s); Redis `set(key, value, ttl: nil)` uses a keyword TTL ## Default Settings @@ -50,12 +59,17 @@ Legion::Cache (singleton module) "cache_nils": false, "pool_size": 10, "timeout": 5, - "expires_in": 0 + "expires_in": 0, + "serializer": "Legion::JSON" } ``` The `driver` is auto-detected at load time: prefers `dalli`, falls back to `redis` if dalli is unavailable. Both gems are required dependencies so auto-detection is a fallback for unusual environments. +### Memcached value_max_bytes + +Dalli enforces a 1MB client-side limit by default (`value_max_bytes: 1_048_576`). The Memcached driver overrides this to **8MB** (`8 * 1024 * 1024`) unless explicitly set. This prevents silent rejection of large cached values. The Memcached server must also be started with `-I 8m` to accept values up to 8MB server-side. + ## Dependencies | Gem | Purpose | diff --git a/README.md b/README.md index c80e703..5b267b4 100644 --- a/README.md +++ b/README.md @@ -2,6 +2,8 @@ Caching wrapper for the [LegionIO](https://github.com/LegionIO/LegionIO) framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. +**Version**: 1.2.1 + ## Installation ```bash @@ -21,8 +23,21 @@ require 'legion/cache' Legion::Cache.setup Legion::Cache.connected? # => true + +# Memcached driver (default) — TTL is a positional argument, default 180s +Legion::Cache.set('foobar', 'testing', 10) +Legion::Cache.get('foobar') # => 'testing' +Legion::Cache.fetch('foobar') # => 'testing' (get with block support) +Legion::Cache.delete('foobar') # => true +Legion::Cache.flush # flush all keys + +# Redis driver — TTL is a keyword argument Legion::Cache.set('foobar', 'testing', ttl: 10) -Legion::Cache.get('foobar') # => 'testing' +Legion::Cache.get('foobar') # => 'testing' +Legion::Cache.delete('foobar') # => true +Legion::Cache.flush # flushdb + +Legion::Cache.shutdown ``` ## Configuration @@ -44,7 +59,22 @@ Legion::Cache.get('foobar') # => 'testing' } ``` -The driver is auto-detected at startup: prefers `dalli` (Memcached) if available, falls back to `redis`. Override with `"driver": "redis"` and update `servers` to point at your Redis instance. +The driver is auto-detected at load time: prefers `dalli` (Memcached) if available, falls back to `redis`. Override with `"driver": "redis"` and update `servers` to point at your Redis instance. + +### Memcached notes + +- `value_max_bytes` defaults to **8MB**. Dalli enforces a 1MB client-side limit by default, which silently rejects large values. This default overrides that. Your Memcached server should also be started with `-I 8m` to match. +- Redis default pool size is 20; Memcached default pool size is 10. + +## Pool API + +```ruby +Legion::Cache.connected? # => true/false +Legion::Cache.size # total pool connections +Legion::Cache.available # idle pool connections +Legion::Cache.restart # close and reconnect pool +Legion::Cache.shutdown # close pool and mark disconnected +``` ## Requirements From 4aadafdc82b3cf8df95125cb9d849be4fb6267e9 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 16 Mar 2026 12:54:16 -0500 Subject: [PATCH 016/108] add Settings.local defaults for local cache tier --- lib/legion/cache/settings.rb | 19 +++++++++++++++++++ spec/legion/settings_spec.rb | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index ae88852..0453c38 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -10,6 +10,7 @@ module Legion module Cache module Settings Legion::Settings.merge_settings(:cache, default) if Legion::Settings.method_defined? :merge_settings + Legion::Settings.merge_settings(:cache_local, local) if Legion::Settings.method_defined? :merge_settings def self.default { driver: driver, @@ -28,6 +29,24 @@ def self.default } end + def self.local + { + driver: driver, + servers: ['127.0.0.1:11211'], + connected: false, + enabled: true, + namespace: 'legion_local', + compress: false, + failover: true, + threadsafe: true, + expires_in: 0, + cache_nils: false, + pool_size: 5, + timeout: 3, + serializer: Legion::JSON + } + end + def self.driver(prefer = 'dalli') secondary = prefer == 'dalli' ? 'redis' : 'dalli' if Gem::Specification.find_all_by_name(prefer).any? diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index c677e8f..32a3007 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -65,6 +65,38 @@ end end + describe '.local' do + subject(:locals) { described_class.local } + + it 'returns a Hash' do + expect(locals).to be_a(Hash) + end + + it 'defaults enabled to true' do + expect(locals[:enabled]).to eq(true) + end + + it 'defaults servers to localhost' do + expect(locals[:servers]).to eq(['127.0.0.1:11211']) + end + + it 'defaults namespace to legion_local' do + expect(locals[:namespace]).to eq('legion_local') + end + + it 'defaults pool_size to 5' do + expect(locals[:pool_size]).to eq(5) + end + + it 'defaults timeout to 3' do + expect(locals[:timeout]).to eq(3) + end + + it 'auto-detects driver independently' do + expect(locals[:driver]).to be_a(String) + end + end + describe '.driver' do it 'returns a string' do expect(described_class.driver).to be_a(String) From 63adf19e5add160a141ff650b3cfd409ad8e7099 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 16 Mar 2026 12:57:53 -0500 Subject: [PATCH 017/108] add Legion::Cache::Local module with driver delegation --- lib/legion/cache/local.rb | 114 ++++++++++++++++++++++++++++++++++++++ spec/legion/local_spec.rb | 80 ++++++++++++++++++++++++++ 2 files changed, 194 insertions(+) create mode 100644 lib/legion/cache/local.rb create mode 100644 spec/legion/local_spec.rb diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb new file mode 100644 index 0000000..5aade9a --- /dev/null +++ b/lib/legion/cache/local.rb @@ -0,0 +1,114 @@ +# frozen_string_literal: true + +require 'legion/cache/settings' + +module Legion + module Cache + module Local + class << self + def setup(**) + return if @connected + + settings = local_settings + return unless settings[:enabled] + + driver_name = settings[:driver] || Legion::Cache::Settings.driver + @driver = build_driver(driver_name) + @driver.client(**settings, **) + @connected = true + Legion::Logging.info "Legion::Cache::Local connected (#{driver_name})" if defined?(Legion::Logging) + rescue StandardError => e + Legion::Logging.warn "Legion::Cache::Local setup failed: #{e.message}" if defined?(Legion::Logging) + @connected = false + end + + def shutdown + return unless @connected + + Legion::Logging.info 'Shutting down Legion::Cache::Local' if defined?(Legion::Logging) + @driver&.close + @driver = nil + @connected = false + end + + def connected? + @connected == true + end + + def get(key) + @driver.get(key) + end + + def set(key, value, ttl = 180) + @driver.set(key, value, ttl) + end + + def fetch(key, ttl = nil) + @driver.fetch(key, ttl) + end + + def delete(key) + @driver.delete(key) + end + + def flush(delay = 0) + @driver.flush(delay) + end + + def client + @driver&.client + end + + def close + @driver&.close + @connected = false + end + + def restart(**opts) + @driver&.restart(**opts) + @connected = true + end + + def size + @driver.size + end + + def available + @driver.available + end + + def pool_size + @driver.pool_size + end + + def timeout + @driver.timeout + end + + def reset! + @driver = nil + @connected = false + end + + private + + def build_driver(driver_name) + case driver_name + when 'redis' + require 'legion/cache/redis' + Legion::Cache::Redis.dup + else + require 'legion/cache/memcached' + Legion::Cache::Memcached.dup + end + end + + def local_settings + return Legion::Cache::Settings.local unless defined?(Legion::Settings) + + Legion::Settings[:cache_local] || Legion::Cache::Settings.local + end + end + end + end +end diff --git a/spec/legion/local_spec.rb b/spec/legion/local_spec.rb new file mode 100644 index 0000000..2da433d --- /dev/null +++ b/spec/legion/local_spec.rb @@ -0,0 +1,80 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/local' + +RSpec.describe Legion::Cache::Local do + describe 'module interface' do + it 'responds to setup' do + expect(described_class).to respond_to(:setup) + end + + it 'responds to shutdown' do + expect(described_class).to respond_to(:shutdown) + end + + it 'responds to connected?' do + expect(described_class).to respond_to(:connected?) + end + + it 'responds to get' do + expect(described_class).to respond_to(:get) + end + + it 'responds to set' do + expect(described_class).to respond_to(:set) + end + + it 'responds to delete' do + expect(described_class).to respond_to(:delete) + end + + it 'responds to flush' do + expect(described_class).to respond_to(:flush) + end + + it 'responds to fetch' do + expect(described_class).to respond_to(:fetch) + end + + it 'responds to client' do + expect(described_class).to respond_to(:client) + end + + it 'responds to reset!' do + expect(described_class).to respond_to(:reset!) + end + + it 'responds to close' do + expect(described_class).to respond_to(:close) + end + + it 'responds to restart' do + expect(described_class).to respond_to(:restart) + end + + it 'responds to size' do + expect(described_class).to respond_to(:size) + end + + it 'responds to available' do + expect(described_class).to respond_to(:available) + end + + it 'responds to pool_size' do + expect(described_class).to respond_to(:pool_size) + end + + it 'responds to timeout' do + expect(described_class).to respond_to(:timeout) + end + end + + describe 'not connected' do + before { described_class.reset! } + + it 'reports not connected' do + expect(described_class.connected?).to eq false + end + end +end From 46b3aa78f5dea6451d7c4751ab6e0be534812c03 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 16 Mar 2026 13:02:55 -0500 Subject: [PATCH 018/108] add integration tests for Legion::Cache::Local Also fix Local#restart to preserve local settings (namespace, etc.) by merging local_settings as the base before applying caller-supplied opts. Without this, restart dropped the legion_local namespace and wrote to the shared namespace, breaking isolation. --- lib/legion/cache/local.rb | 3 +- spec/legion/local_spec.rb | 70 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 72 insertions(+), 1 deletion(-) diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index 5aade9a..fee2b80 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -65,7 +65,8 @@ def close end def restart(**opts) - @driver&.restart(**opts) + settings = local_settings + @driver&.restart(**settings.merge(opts)) @connected = true end diff --git a/spec/legion/local_spec.rb b/spec/legion/local_spec.rb index 2da433d..4346383 100644 --- a/spec/legion/local_spec.rb +++ b/spec/legion/local_spec.rb @@ -1,6 +1,7 @@ # frozen_string_literal: true require 'spec_helper' +require 'legion/cache' require 'legion/cache/local' RSpec.describe Legion::Cache::Local do @@ -78,3 +79,72 @@ end end end + +RSpec.describe 'Legion::Cache::Local integration' do + before(:all) do + Legion::Cache::Local.reset! + Legion::Cache::Local.setup + end + + after(:all) do + Legion::Cache::Local.shutdown + end + + it 'can setup and connect' do + expect(Legion::Cache::Local.connected?).to eq true + end + + it 'can set and get' do + expect(Legion::Cache::Local.set('local_test', 'hello')).to eq true + expect(Legion::Cache::Local.get('local_test')).to eq 'hello' + end + + it 'can set with TTL' do + expect(Legion::Cache::Local.set('local_ttl', 'expires', 10)).to eq true + expect(Legion::Cache::Local.get('local_ttl')).to eq 'expires' + end + + it 'can delete' do + Legion::Cache::Local.set('local_del', 'gone') + expect(Legion::Cache::Local.delete('local_del')).to eq true + expect(Legion::Cache::Local.get('local_del')).to be_nil + end + + it 'can flush' do + Legion::Cache::Local.set('local_flush', 'bye') + expect(Legion::Cache::Local.flush).to eq true + end + + it 'can report size and available' do + expect(Legion::Cache::Local.size).to eq 5 + expect(Legion::Cache::Local.available).to be_a(Integer) + end + + it 'can report pool_size and timeout' do + expect(Legion::Cache::Local.pool_size).to eq 5 + expect(Legion::Cache::Local.timeout).to eq 3 + end + + it 'can shutdown and reconnect' do + Legion::Cache::Local.shutdown + expect(Legion::Cache::Local.connected?).to eq false + Legion::Cache::Local.setup + expect(Legion::Cache::Local.connected?).to eq true + end + + it 'can restart with new values' do + Legion::Cache::Local.restart(pool_size: 2, timeout: 1) + expect(Legion::Cache::Local.connected?).to eq true + expect(Legion::Cache::Local.set('restart_test', 'works')).to eq true + expect(Legion::Cache::Local.get('restart_test')).to eq 'works' + end + + it 'uses separate namespace from shared cache' do + Legion::Cache::Local.set('ns_test', 'local_value') + Legion::Cache.setup + Legion::Cache.set('ns_test', 'shared_value') + expect(Legion::Cache::Local.get('ns_test')).to eq 'local_value' + expect(Legion::Cache.get('ns_test')).to eq 'shared_value' + Legion::Cache.shutdown + end +end From d62adf7651e4d4778f9f6bb40161eba395a2c896 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 16 Mar 2026 13:12:57 -0500 Subject: [PATCH 019/108] add fallback wiring from shared cache to local --- lib/legion/cache.rb | 77 ++++++++++++++++++++++++++++-- spec/legion/cache_fallback_spec.rb | 77 ++++++++++++++++++++++++++++++ 2 files changed, 149 insertions(+), 5 deletions(-) create mode 100644 spec/legion/cache_fallback_spec.rb diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index ea1414e..04c00c3 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -5,6 +5,7 @@ require 'legion/cache/memcached' require 'legion/cache/redis' +require 'legion/cache/local' module Legion module Cache @@ -18,17 +19,83 @@ class << self def setup(**) return Legion::Settings[:cache][:connected] = true if connected? - return unless client(**Legion::Settings[:cache], **) - - @connected = true - Legion::Settings[:cache][:connected] = true + setup_local + setup_shared(**) end def shutdown Legion::Logging.info 'Shutting down Legion::Cache' - close + close unless @using_local + Legion::Cache::Local.shutdown if Legion::Cache::Local.connected? + @using_local = false + @connected = false Legion::Settings[:cache][:connected] = false end + + def local + Legion::Cache::Local + end + + def using_local? + @using_local == true + end + + def get(key) + return Legion::Cache::Local.get(key) if @using_local + + super + end + + def set(key, value, ttl = 180) + return Legion::Cache::Local.set(key, value, ttl) if @using_local + + super + end + + def fetch(key, ttl = nil) + return Legion::Cache::Local.fetch(key, ttl) if @using_local + + super + end + + def delete(key) + return Legion::Cache::Local.delete(key) if @using_local + + super + end + + def flush(delay = 0) + return Legion::Cache::Local.flush(delay) if @using_local + + super + end + + private + + def setup_local + return if Legion::Cache::Local.connected? + + Legion::Cache::Local.setup + rescue StandardError => e + Legion::Logging.warn "Local cache setup failed: #{e.message}" if defined?(Legion::Logging) + end + + def setup_shared(**) + client(**Legion::Settings[:cache], **) + @connected = true + @using_local = false + Legion::Settings[:cache][:connected] = true + rescue StandardError => e + Legion::Logging.warn "Shared cache unavailable (#{e.message}), falling back to Local" if defined?(Legion::Logging) + if Legion::Cache::Local.connected? + @using_local = true + @connected = true + Legion::Settings[:cache][:connected] = true + else + @connected = false + Legion::Settings[:cache][:connected] = false + end + end end end end diff --git a/spec/legion/cache_fallback_spec.rb b/spec/legion/cache_fallback_spec.rb new file mode 100644 index 0000000..24751e5 --- /dev/null +++ b/spec/legion/cache_fallback_spec.rb @@ -0,0 +1,77 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'Legion::Cache fallback' do + describe '.local' do + it 'returns Legion::Cache::Local' do + expect(Legion::Cache.local).to eq Legion::Cache::Local + end + end + + describe '.using_local?' do + it 'responds to using_local?' do + expect(Legion::Cache).to respond_to(:using_local?) + end + + it 'defaults to false when shared is available' do + Legion::Cache.setup + expect(Legion::Cache.using_local?).to eq false + Legion::Cache.shutdown + end + end + + describe 'fallback on shared failure' do + before do + Legion::Cache::Local.reset! + # Force disconnected state + Legion::Cache.close if Legion::Cache.connected? + Legion::Cache.instance_variable_set(:@connected, false) + Legion::Cache.instance_variable_set(:@client, nil) + Legion::Cache.instance_variable_set(:@using_local, false) + # Stub client to raise a connection error (no network calls) + allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'connection refused') + end + + after do + allow(Legion::Cache).to receive(:client).and_call_original + Legion::Cache::Local.shutdown if Legion::Cache::Local.connected? + Legion::Cache.instance_variable_set(:@using_local, false) + Legion::Cache.instance_variable_set(:@connected, false) + end + + it 'falls back to local when shared raises' do + Legion::Cache.setup + expect(Legion::Cache.connected?).to eq true + expect(Legion::Cache.using_local?).to eq true + end + + it 'delegates get/set/delete to local when in fallback mode' do + Legion::Cache.setup + expect(Legion::Cache.set('fallback_test', 'works')).to eq true + expect(Legion::Cache.get('fallback_test')).to eq 'works' + expect(Legion::Cache.delete('fallback_test')).to eq true + end + + it 'delegates fetch to local when in fallback mode' do + Legion::Cache.setup + Legion::Cache.set('fetch_test', 'fetchval') + expect(Legion::Cache.fetch('fetch_test')).to eq 'fetchval' + end + + it 'delegates flush to local when in fallback mode' do + Legion::Cache.setup + Legion::Cache.set('flush_test', 'bye') + expect(Legion::Cache.flush).to eq true + end + end + + describe 'shutdown' do + it 'resets using_local? to false after shutdown' do + Legion::Cache.setup + Legion::Cache.shutdown + expect(Legion::Cache.using_local?).to eq false + end + end +end From 25472e56f3f342a71a82718c51765a10cd646152 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 16 Mar 2026 13:16:51 -0500 Subject: [PATCH 020/108] bump to 1.3.0, add changelog and docs for cache local --- CHANGELOG.md | 15 ++++++++++--- CLAUDE.md | 44 +++++++++++++++++++++++++++++++++++-- lib/legion/cache/version.rb | 2 +- 3 files changed, 55 insertions(+), 6 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 6278c70..313dcbc 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,9 +1,18 @@ -# Legion::Cache +# Changelog -## v1.2.1 - 2026-03-16 +## [1.3.0] - 2026-03-16 + +### Added +- `Legion::Cache::Local` module for local Redis/Memcached caching +- `Settings.local` with independent defaults (namespace: `legion_local`, pool_size: 5, timeout: 3) +- Transparent fallback: shared cache failure at setup redirects all operations to Local +- `Legion::Cache.local` accessor, `Legion::Cache.using_local?` query + +## [1.2.1] - 2026-03-16 ### Fixed - Set dalli `value_max_bytes` to 8MB by default — dalli enforces a 1MB client-side limit that prevented large cache values from being stored even when memcached server allows larger items -## v1.2.0 +## [1.2.0] + Moving from BitBucket to GitHub. All git history is reset from this point on diff --git a/CLAUDE.md b/CLAUDE.md index 29b8a13..ef3ff80 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -25,6 +25,8 @@ Legion::Cache (singleton module) ├── .available # Idle pool connections ├── .restart(**opts) # Close and reconnect pool with optional new opts ├── .shutdown # Close connections, mark disconnected +├── .local # Accessor for Legion::Cache::Local +├── .using_local? # Whether fallback to local is active │ ├── Memcached # Dalli-based Memcached driver (default) │ └── Uses connection_pool for thread safety @@ -32,6 +34,13 @@ Legion::Cache (singleton module) ├── Redis # Redis driver │ └── Uses connection_pool for thread safety │ └── Default pool_size is 20 (Memcached default is 10) +├── Local # Local cache tier (localhost Redis/Memcached, fallback target) +│ ├── .setup # Connect to local cache server (auto-detect driver) +│ ├── .shutdown # Close local connection +│ ├── .connected? # Whether local cache is active +│ ├── .get/set/delete/fetch/flush # Cache operations on local tier +│ ├── .restart(**opts) # Close and reconnect with new opts +│ └── .reset! # Clear all state (testing) ├── Pool # Connection pool management (connected?, size, available, close, restart) ├── Settings # Default cache config + driver auto-detection └── Version @@ -44,6 +53,14 @@ Legion::Cache (singleton module) - **Unified Interface**: Same `get`/`set`/`delete`/`flush`/`connected?`/`shutdown` methods regardless of backend - **TTL Signature Difference**: Memcached `set(key, value, ttl)` uses a positional TTL (default 180s); Redis `set(key, value, ttl: nil)` uses a keyword TTL +### Two-Tier Cache Architecture + +- **Shared** (`Legion::Cache`) — remote Redis/Memcached cluster for cross-node caching +- **Local** (`Legion::Cache::Local`) — localhost Redis/Memcached for per-machine caching +- **Fallback**: If shared cluster is unreachable at setup, all operations transparently delegate to Local +- Both tiers use the same driver modules (`Memcached`/`Redis`) with independent connection pools +- Local uses `.dup` on the driver module to get isolated `@client`/`@connected` state + ## Default Settings ```json @@ -66,6 +83,28 @@ Legion::Cache (singleton module) The `driver` is auto-detected at load time: prefers `dalli`, falls back to `redis` if dalli is unavailable. Both gems are required dependencies so auto-detection is a fallback for unusual environments. +### Local Default Settings + +`Legion::Cache::Settings.local` provides independent defaults for the local tier: + +```json +{ + "driver": "dalli", + "servers": ["127.0.0.1:11211"], + "connected": false, + "enabled": true, + "namespace": "legion_local", + "compress": false, + "failover": false, + "threadsafe": true, + "cache_nils": false, + "pool_size": 5, + "timeout": 3, + "expires_in": 0, + "serializer": "Legion::JSON" +} +``` + ### Memcached value_max_bytes Dalli enforces a 1MB client-side limit by default (`value_max_bytes: 1_048_576`). The Memcached driver overrides this to **8MB** (`8 * 1024 * 1024`) unless explicitly set. This prevents silent rejection of large cached values. The Memcached server must also be started with `-I 8m` to accept values up to 8MB server-side. @@ -84,11 +123,12 @@ Dalli enforces a 1MB client-side limit by default (`value_max_bytes: 1_048_576`) | Path | Purpose | |------|---------| -| `lib/legion/cache.rb` | Module entry, driver selection, setup/shutdown | +| `lib/legion/cache.rb` | Module entry, driver selection, setup/shutdown, fallback wiring | | `lib/legion/cache/memcached.rb` | Dalli/Memcached driver implementation | | `lib/legion/cache/redis.rb` | Redis driver implementation | +| `lib/legion/cache/local.rb` | Local cache tier (localhost, fallback target) | | `lib/legion/cache/pool.rb` | Connection pool management | -| `lib/legion/cache/settings.rb` | Default configuration | +| `lib/legion/cache/settings.rb` | Default configuration + local defaults | | `lib/legion/cache/version.rb` | VERSION constant | ## Role in LegionIO diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index abe7d54..fc6b0ac 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.2.1' + VERSION = '1.3.0' end end From cbe8d7061dc97a5d7e824aabe11dbf4b9c719152 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 16 Mar 2026 13:20:09 -0500 Subject: [PATCH 021/108] update readme for v1.3.0 with two-tier cache docs --- README.md | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 5b267b4..287102b 100644 --- a/README.md +++ b/README.md @@ -2,7 +2,7 @@ Caching wrapper for the [LegionIO](https://github.com/LegionIO/LegionIO) framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. -**Version**: 1.2.1 +**Version**: 1.3.0 ## Installation @@ -40,6 +40,25 @@ Legion::Cache.flush # flushdb Legion::Cache.shutdown ``` +## Two-Tier Cache + +Legion::Cache supports a two-tier architecture: a shared remote cluster and a local per-machine cache. If the shared cluster is unreachable at setup, all operations transparently fall back to local. + +```ruby +# Shared cache connects to remote cluster; Local connects to localhost +Legion::Cache.setup # starts Local first, then tries shared +Legion::Cache.using_local? # => true if shared was unreachable +Legion::Cache.local # => Legion::Cache::Local + +# Use Local directly if needed +Legion::Cache::Local.setup +Legion::Cache::Local.set('key', 'value', 60) +Legion::Cache::Local.get('key') # => 'value' +Legion::Cache::Local.shutdown +``` + +Local uses a separate namespace (`legion_local`) and independent connection pool (pool_size: 5, timeout: 3) so it never collides with the shared tier. + ## Configuration ```json @@ -66,6 +85,20 @@ The driver is auto-detected at load time: prefers `dalli` (Memcached) if availab - `value_max_bytes` defaults to **8MB**. Dalli enforces a 1MB client-side limit by default, which silently rejects large values. This default overrides that. Your Memcached server should also be started with `-I 8m` to match. - Redis default pool size is 20; Memcached default pool size is 10. +### Local Cache Settings + +```json +{ + "driver": "dalli", + "servers": ["127.0.0.1:11211"], + "namespace": "legion_local", + "pool_size": 5, + "timeout": 3 +} +``` + +Override via `Legion::Settings[:cache_local]`. + ## Pool API ```ruby From 36d2cfa8b1a50b36c00cf325ee44f541b656cbe8 Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 17 Mar 2026 00:31:55 -0500 Subject: [PATCH 022/108] add needs-memcached to ci: fixes dalli ring errors in test suite --- .github/workflows/ci.yml | 1 + 1 file changed, 1 insertion(+) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 58e3e6e..9a0abe1 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -9,6 +9,7 @@ jobs: uses: LegionIO/.github/.github/workflows/ci.yml@main with: needs-redis: true + needs-memcached: true release: needs: ci From 40ca03bf2c20c877eb8fd97a75850f26856caadd Mon Sep 17 00:00:00 2001 From: Esity Date: Wed, 18 Mar 2026 23:46:37 -0500 Subject: [PATCH 023/108] reindex documentation to reflect current codebase state --- CLAUDE.md | 1 + 1 file changed, 1 insertion(+) diff --git a/CLAUDE.md b/CLAUDE.md index ef3ff80..38163df 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -8,6 +8,7 @@ Caching wrapper for the LegionIO framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. **GitHub**: https://github.com/LegionIO/legion-cache +**Version**: 1.3.0 **License**: Apache-2.0 ## Architecture From 88c439ffce4bd5d8e63d44e4be16033ee58866d7 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 12:54:22 -0500 Subject: [PATCH 024/108] add normalize_driver to map memcached/dalli/redis to gem names --- lib/legion/cache/settings.rb | 8 ++++++++ spec/legion/settings_spec.rb | 21 +++++++++++++++++++++ 2 files changed, 29 insertions(+) diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 0453c38..7217b8b 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -47,6 +47,14 @@ def self.local } end + def self.normalize_driver(name) + case name.to_s + when 'redis' then 'redis' + when 'memcached', 'dalli' then 'dalli' + else name.to_s + end + end + def self.driver(prefer = 'dalli') secondary = prefer == 'dalli' ? 'redis' : 'dalli' if Gem::Specification.find_all_by_name(prefer).any? diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index 32a3007..afb9bcc 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -97,6 +97,27 @@ end end + describe '.normalize_driver' do + it 'maps redis to redis' do + expect(described_class.normalize_driver('redis')).to eq('redis') + expect(described_class.normalize_driver(:redis)).to eq('redis') + end + + it 'maps memcached to dalli' do + expect(described_class.normalize_driver('memcached')).to eq('dalli') + expect(described_class.normalize_driver(:memcached)).to eq('dalli') + end + + it 'maps dalli to dalli for backwards compatibility' do + expect(described_class.normalize_driver('dalli')).to eq('dalli') + expect(described_class.normalize_driver(:dalli)).to eq('dalli') + end + + it 'passes through unknown drivers as strings' do + expect(described_class.normalize_driver('custom')).to eq('custom') + end + end + describe '.driver' do it 'returns a string' do expect(described_class.driver).to be_a(String) From cd00419d34908c9a478ebf4cf834519cf68ae97f Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 12:55:15 -0500 Subject: [PATCH 025/108] add resolve_servers with per-driver default ports and dedup --- lib/legion/cache/settings.rb | 13 ++++++++ spec/legion/settings_spec.rb | 58 ++++++++++++++++++++++++++++++++++++ 2 files changed, 71 insertions(+) diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 7217b8b..d5b5ad6 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -47,6 +47,19 @@ def self.local } end + DEFAULT_PORTS = { 'dalli' => 11_211, 'redis' => 6379 }.freeze + + def self.resolve_servers(driver:, server: nil, servers: [], port: nil) + gem_driver = normalize_driver(driver) + port ||= DEFAULT_PORTS.fetch(gem_driver, 11_211) + + all = Array(servers) + Array(server) + all = ["127.0.0.1:#{port}"] if all.empty? + + all.map! { |s| s.include?(':') ? s : "#{s}:#{port}" } + all.uniq + end + def self.normalize_driver(name) case name.to_s when 'redis' then 'redis' diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index afb9bcc..debb0d9 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -118,6 +118,64 @@ end end + describe '.resolve_servers' do + it 'returns default localhost with memcached port when no servers given' do + result = described_class.resolve_servers(driver: 'memcached') + expect(result).to eq(['127.0.0.1:11211']) + end + + it 'returns default localhost with redis port when no servers given' do + result = described_class.resolve_servers(driver: 'redis') + expect(result).to eq(['127.0.0.1:6379']) + end + + it 'accepts a singular server string' do + result = described_class.resolve_servers(driver: 'memcached', server: '10.0.0.5') + expect(result).to eq(['10.0.0.5:11211']) + end + + it 'accepts a servers array' do + result = described_class.resolve_servers(driver: 'redis', servers: ['10.0.0.5', '10.0.0.6']) + expect(result).to eq(['10.0.0.5:6379', '10.0.0.6:6379']) + end + + it 'merges singular and plural together' do + result = described_class.resolve_servers( + driver: 'memcached', server: '10.0.0.5', servers: ['10.0.0.6'] + ) + expect(result).to contain_exactly('10.0.0.6:11211', '10.0.0.5:11211') + end + + it 'preserves explicit ports' do + result = described_class.resolve_servers(driver: 'memcached', servers: ['10.0.0.5:9999']) + expect(result).to eq(['10.0.0.5:9999']) + end + + it 'injects default port only where missing' do + result = described_class.resolve_servers( + driver: 'redis', servers: ['10.0.0.5:9999', '10.0.0.6'] + ) + expect(result).to eq(['10.0.0.5:9999', '10.0.0.6:6379']) + end + + it 'deduplicates entries' do + result = described_class.resolve_servers( + driver: 'memcached', server: '10.0.0.5', servers: ['10.0.0.5'] + ) + expect(result).to eq(['10.0.0.5:11211']) + end + + it 'allows port override' do + result = described_class.resolve_servers(driver: 'memcached', servers: ['10.0.0.5'], port: 22_122) + expect(result).to eq(['10.0.0.5:22122']) + end + + it 'handles dalli as memcached' do + result = described_class.resolve_servers(driver: 'dalli') + expect(result).to eq(['127.0.0.1:11211']) + end + end + describe '.driver' do it 'returns a string' do expect(described_class.driver).to be_a(String) From c6fae53b5e681453ef9258c40d86c425ea6597ad Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 12:56:13 -0500 Subject: [PATCH 026/108] use resolve_servers for driver-aware default server lists --- lib/legion/cache/settings.rb | 4 ++-- spec/legion/settings_spec.rb | 10 ++++++---- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index d5b5ad6..b5a2bbd 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -14,7 +14,7 @@ module Settings def self.default { driver: driver, - servers: ['127.0.0.1:11211'], + servers: resolve_servers(driver: driver), connected: false, enabled: true, namespace: 'legion', @@ -32,7 +32,7 @@ def self.default def self.local { driver: driver, - servers: ['127.0.0.1:11211'], + servers: resolve_servers(driver: driver), connected: false, enabled: true, namespace: 'legion_local', diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index debb0d9..b28e00a 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -16,8 +16,9 @@ expect(%w[dalli redis]).to include(defaults[:driver]) end - it 'has servers default' do - expect(defaults[:servers]).to eq(['127.0.0.1:11211']) + it 'has servers default matching driver port' do + expected_port = defaults[:driver] == 'redis' ? 6379 : 11_211 + expect(defaults[:servers]).to eq(["127.0.0.1:#{expected_port}"]) end it 'has connected set to false' do @@ -76,8 +77,9 @@ expect(locals[:enabled]).to eq(true) end - it 'defaults servers to localhost' do - expect(locals[:servers]).to eq(['127.0.0.1:11211']) + it 'defaults servers to localhost with driver-appropriate port' do + expected_port = locals[:driver] == 'redis' ? 6379 : 11_211 + expect(locals[:servers]).to eq(["127.0.0.1:#{expected_port}"]) end it 'defaults namespace to legion_local' do From 87aaab1a34d88f3d63b28b513887872f01234c4b Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 12:58:44 -0500 Subject: [PATCH 027/108] use normalize_driver for cache driver selection at load time --- lib/legion/cache.rb | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 04c00c3..54e0012 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -9,7 +9,7 @@ module Legion module Cache - if Legion::Settings[:cache][:driver] == 'redis' + if Legion::Cache::Settings.normalize_driver(Legion::Settings[:cache][:driver]) == 'redis' extend Legion::Cache::Redis else extend Legion::Cache::Memcached From 83e683d19532e2d82bafdc3cc2f8a1a0b7e2c894 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 12:59:20 -0500 Subject: [PATCH 028/108] use normalize_driver in local cache build_driver --- lib/legion/cache/local.rb | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index fee2b80..6603f8b 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -94,7 +94,7 @@ def reset! private def build_driver(driver_name) - case driver_name + case Legion::Cache::Settings.normalize_driver(driver_name) when 'redis' require 'legion/cache/redis' Legion::Cache::Redis.dup From e23012207b0d881a548f8a99e6f3205c39843856 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:00:40 -0500 Subject: [PATCH 029/108] fix redis driver to use configured servers via resolve_servers --- lib/legion/cache/redis.rb | 10 ++++++++-- spec/legion/redis_spec.rb | 8 ++++++++ 2 files changed, 16 insertions(+), 2 deletions(-) diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 75f8ad0..b903cad 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -2,6 +2,7 @@ require 'redis' require 'legion/cache/pool' +require 'legion/cache/settings' module Legion module Cache @@ -9,14 +10,19 @@ module Redis include Legion::Cache::Pool extend self # rubocop:disable Style/ModuleFunction - def client(pool_size: 20, timeout: 5, **) + def client(pool_size: 20, timeout: 5, server: nil, servers: [], **) return @client unless @client.nil? @pool_size = pool_size @timeout = timeout + resolved = Legion::Cache::Settings.resolve_servers( + driver: 'redis', server: server, servers: servers + ) + host, port = resolved.first.split(':') + @client = ConnectionPool.new(size: pool_size, timeout: timeout) do - ::Redis.new + ::Redis.new(host: host, port: port.to_i) end @connected = true @client diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index 36f128a..82a6620 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -48,6 +48,14 @@ expect(@cache.flush).to eq true end + it 'accepts servers parameter' do + @cache.close if @cache.connected? + @cache.instance_variable_set(:@client, nil) + @cache.instance_variable_set(:@connected, false) + expect { @cache.client(servers: ['127.0.0.1:6379']) }.not_to raise_error + expect(@cache.connected?).to eq true + end + it 'wont use bogus methods' do expect(@cache).not_to respond_to :this_is_fake end From b9321d9b76b0834b6413b0c5d750c1dda9351bd2 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:01:38 -0500 Subject: [PATCH 030/108] wire memcached driver through resolve_servers for port injection and dedup --- lib/legion/cache/memcached.rb | 17 ++++++++++++----- spec/legion/memcached_spec.rb | 8 ++++++++ 2 files changed, 20 insertions(+), 5 deletions(-) diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index bc25a3c..f172339 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -9,18 +9,25 @@ module Memcached include Legion::Cache::Pool extend self # rubocop:disable Style/ModuleFunction - def client(servers: Legion::Settings[:cache][:servers], **opts) + def client(server: nil, servers: nil, **opts) return @client unless @client.nil? - @pool_size = opts.key?(:pool_size) ? opts[:pool_size] : Legion::Settings[:cache][:pool_size] || 10 - @timeout = opts.key?(:timeout) ? opts[:timeout] : Legion::Settings[:cache][:timeout] || 5 + settings = defined?(Legion::Settings) ? Legion::Settings[:cache] : {} + servers ||= settings[:servers] || [] + + @pool_size = opts.key?(:pool_size) ? opts[:pool_size] : settings[:pool_size] || 10 + @timeout = opts.key?(:timeout) ? opts[:timeout] : settings[:timeout] || 5 + + resolved = Legion::Cache::Settings.resolve_servers( + driver: 'memcached', server: server, servers: Array(servers) + ) Dalli.logger = Legion::Logging - cache_opts = Legion::Settings[:cache].merge(opts) + cache_opts = settings.merge(opts) cache_opts[:value_max_bytes] ||= 8 * 1024 * 1024 @client = ConnectionPool.new(size: pool_size, timeout: timeout) do - Dalli::Client.new(servers, cache_opts) + Dalli::Client.new(resolved, cache_opts) end @connected = true diff --git a/spec/legion/memcached_spec.rb b/spec/legion/memcached_spec.rb index 134aeb9..f7eca98 100644 --- a/spec/legion/memcached_spec.rb +++ b/spec/legion/memcached_spec.rb @@ -55,6 +55,14 @@ expect(@cache.flush).to eq true end + it 'accepts singular server parameter' do + @cache.close if @cache.connected? + @cache.instance_variable_set(:@client, nil) + @cache.instance_variable_set(:@connected, false) + expect { @cache.client(server: '127.0.0.1') }.not_to raise_error + expect(@cache.connected?).to eq true + end + it 'wont use bogus methods' do expect(@cache).not_to respond_to :this_is_fake end From 6494ab35a3c6bf520313bed5afdaaba8dde5af3d Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:12:27 -0500 Subject: [PATCH 031/108] bump to 1.3.1, add changelog and docs for driver normalization --- CHANGELOG.md | 15 +++++++++++++++ README.md | 20 +++++++++++++++++++- lib/legion/cache/version.rb | 2 +- 3 files changed, 35 insertions(+), 2 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 313dcbc..a130816 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,20 @@ # Changelog +## [1.3.1] - 2026-03-20 + +### Added +- `Settings.normalize_driver` — maps `:memcached`, `:dalli`, `:redis` to internal gem names +- `Settings.resolve_servers` — merges `server:` (string) and `servers:` (array), injects default port per driver (memcached: 11211, redis: 6379), deduplicates +- `Settings::DEFAULT_PORTS` constant for driver default ports + +### Fixed +- Redis driver now uses configured `server:`/`servers:` instead of hardcoded localhost +- Memcached driver accepts `server:` (singular) in addition to `servers:` (plural) + +### Changed +- `Settings.default` and `Settings.local` use `resolve_servers` for driver-aware server defaults +- Driver selection in `cache.rb` and `local.rb` uses `normalize_driver` for consistent name handling + ## [1.3.0] - 2026-03-16 ### Added diff --git a/README.md b/README.md index 287102b..ba81fe0 100644 --- a/README.md +++ b/README.md @@ -2,7 +2,7 @@ Caching wrapper for the [LegionIO](https://github.com/LegionIO/LegionIO) framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. -**Version**: 1.3.0 +**Version**: 1.3.1 ## Installation @@ -80,6 +80,24 @@ Local uses a separate namespace (`legion_local`) and independent connection pool The driver is auto-detected at load time: prefers `dalli` (Memcached) if available, falls back to `redis`. Override with `"driver": "redis"` and update `servers` to point at your Redis instance. +### Driver Names + +Supported driver names: `memcached` (or `dalli`), `redis`. All names are normalized internally — `"memcached"` and `"dalli"` are equivalent. + +### Server Resolution + +Both `server` (singular string) and `servers` (array) are accepted and merged. Default ports are injected per driver when omitted: 11211 for memcached, 6379 for redis. Duplicates are removed. + +```json +{ + "cache": { + "driver": "memcached", + "server": "10.0.0.5", + "servers": ["10.0.0.6", "10.0.0.7:22122"] + } +} +``` + ### Memcached notes - `value_max_bytes` defaults to **8MB**. Dalli enforces a 1MB client-side limit by default, which silently rejects large values. This default overrides that. Your Memcached server should also be started with `-I 8m` to match. diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index fc6b0ac..f8badc5 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.0' + VERSION = '1.3.1' end end From d751da98309b0393c5f1136f445c83fde12ff79a Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:34:59 -0500 Subject: [PATCH 032/108] add .worktrees to gitignore --- .gitignore | 1 + 1 file changed, 1 insertion(+) diff --git a/.gitignore b/.gitignore index d1ffe1f..1d17157 100644 --- a/.gitignore +++ b/.gitignore @@ -16,3 +16,4 @@ legionio.key # logs and OS artifacts legion.log .DS_Store +.worktrees/ From 7fd37f0b745610300c859f0c7ba211a3778cb46c Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:36:44 -0500 Subject: [PATCH 033/108] add cacheable memory store with ttl expiry --- lib/legion/cache/cacheable.rb | 30 +++++++++++++++++++++++++ spec/legion/cacheable_spec.rb | 41 +++++++++++++++++++++++++++++++++++ 2 files changed, 71 insertions(+) create mode 100644 lib/legion/cache/cacheable.rb create mode 100644 spec/legion/cacheable_spec.rb diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb new file mode 100644 index 0000000..720b2b4 --- /dev/null +++ b/lib/legion/cache/cacheable.rb @@ -0,0 +1,30 @@ +# frozen_string_literal: true + +require 'digest' + +module Legion + module Cache + module Cacheable + # In-memory fallback store (class-level, process-wide) + def self.memory_store + @memory_store ||= {} + end + + def self.memory_read(key) + entry = memory_store[key] + return nil unless entry + return nil if Time.now.utc > entry[:expires_at] + + entry[:value] + end + + def self.memory_write(key, value, ttl) + memory_store[key] = { value: value, expires_at: Time.now.utc + ttl } + end + + def self.memory_clear! + @memory_store = {} + end + end + end +end diff --git a/spec/legion/cacheable_spec.rb b/spec/legion/cacheable_spec.rb new file mode 100644 index 0000000..ac2c035 --- /dev/null +++ b/spec/legion/cacheable_spec.rb @@ -0,0 +1,41 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/cacheable' + +RSpec.describe Legion::Cache::Cacheable do + before { described_class.memory_clear! } + + describe '.memory_write and .memory_read' do + it 'stores and retrieves a value' do + described_class.memory_write('test.key', { status: 'ok' }, 60) + expect(described_class.memory_read('test.key')).to eq({ status: 'ok' }) + end + + it 'returns nil for missing keys' do + expect(described_class.memory_read('missing')).to be_nil + end + + it 'returns nil for expired entries' do + described_class.memory_write('expired', 'old', 0) + sleep 0.01 + expect(described_class.memory_read('expired')).to be_nil + end + + it 'overwrites existing entries' do + described_class.memory_write('key', 'first', 60) + described_class.memory_write('key', 'second', 60) + expect(described_class.memory_read('key')).to eq('second') + end + end + + describe '.memory_clear!' do + it 'removes all entries' do + described_class.memory_write('a', 1, 60) + described_class.memory_write('b', 2, 60) + described_class.memory_clear! + expect(described_class.memory_read('a')).to be_nil + expect(described_class.memory_read('b')).to be_nil + end + end +end From df8895c55ba45376b464915165b60f55530d048f Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:38:06 -0500 Subject: [PATCH 034/108] add deterministic cache key builder with arg filtering --- lib/legion/cache/cacheable.rb | 6 ++++++ spec/legion/cacheable_spec.rb | 30 ++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+) diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index 720b2b4..b19534c 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -5,6 +5,12 @@ module Legion module Cache module Cacheable + def self.build_cache_key(mod_name, method_name, exclude:, **kwargs) + filtered = kwargs.reject { |k, _| exclude.include?(k) } + args_hash = Digest::MD5.hexdigest(filtered.sort.to_s) + "#{mod_name}.#{method_name}.#{args_hash}" + end + # In-memory fallback store (class-level, process-wide) def self.memory_store @memory_store ||= {} diff --git a/spec/legion/cacheable_spec.rb b/spec/legion/cacheable_spec.rb index ac2c035..d933464 100644 --- a/spec/legion/cacheable_spec.rb +++ b/spec/legion/cacheable_spec.rb @@ -39,3 +39,33 @@ end end end + +RSpec.describe Legion::Cache::Cacheable, '.build_cache_key' do + it 'produces a key with module path, method name, and args hash' do + key = described_class.build_cache_key('MyModule', :my_method, exclude: [], user_id: 'me') + expect(key).to match(/\AMyModule\.my_method\.[a-f0-9]{32}\z/) + end + + it 'excludes filtered args from the hash' do + key_with = described_class.build_cache_key('M', :m, exclude: [:token], user_id: 'me', token: 'secret') + key_without = described_class.build_cache_key('M', :m, exclude: [:token], user_id: 'me') + expect(key_with).to eq(key_without) + end + + it 'produces different keys for different args' do + key_a = described_class.build_cache_key('M', :m, exclude: [], user_id: 'alice') + key_b = described_class.build_cache_key('M', :m, exclude: [], user_id: 'bob') + expect(key_a).not_to eq(key_b) + end + + it 'produces a deterministic key for the same args regardless of order' do + key_a = described_class.build_cache_key('M', :m, exclude: [], b: 2, a: 1) + key_b = described_class.build_cache_key('M', :m, exclude: [], a: 1, b: 2) + expect(key_a).to eq(key_b) + end + + it 'handles empty kwargs' do + key = described_class.build_cache_key('M', :m, exclude: []) + expect(key).to match(/\AM\.m\.[a-f0-9]{32}\z/) + end +end From 7d58593d352a68ee03bc3778e158f671da40990c Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:40:37 -0500 Subject: [PATCH 035/108] add cache read/write dispatcher with local, global, and memory fallback --- lib/legion/cache/cacheable.rb | 52 +++++++++++++++++++++++++ spec/legion/cacheable_spec.rb | 71 +++++++++++++++++++++++++++++++++++ 2 files changed, 123 insertions(+) diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index b19534c..639ac55 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -11,6 +11,58 @@ def self.build_cache_key(mod_name, method_name, exclude:, **kwargs) "#{mod_name}.#{method_name}.#{args_hash}" end + def self.cache_read(key, scope:) + case scope + when :global + return Legion::Cache.get(key) if global_cache_available? + + memory_read(key) + else + local_cache_read(key) || memory_read(key) + end + end + + def self.cache_write(key, value, ttl:, scope:) + case scope + when :global + if global_cache_available? + Legion::Cache.set(key, value, ttl) + else + memory_write(key, value, ttl) + end + else + if local_cache_available? + local_cache_write(key, value, ttl) + else + memory_write(key, value, ttl) + end + end + end + + def self.global_cache_available? + defined?(Legion::Cache) && Legion::Cache.respond_to?(:connected?) && Legion::Cache.connected? + end + + def self.local_cache_available? + defined?(Legion::Cache::Local) && Legion::Cache::Local.respond_to?(:get) + end + + def self.local_cache_read(key) + return nil unless local_cache_available? + + Legion::Cache::Local.get(key) + rescue StandardError + nil + end + + def self.local_cache_write(key, value, ttl) + return unless local_cache_available? + + Legion::Cache::Local.set(key, value, ttl) + rescue StandardError + nil + end + # In-memory fallback store (class-level, process-wide) def self.memory_store @memory_store ||= {} diff --git a/spec/legion/cacheable_spec.rb b/spec/legion/cacheable_spec.rb index d933464..a0acd56 100644 --- a/spec/legion/cacheable_spec.rb +++ b/spec/legion/cacheable_spec.rb @@ -2,6 +2,7 @@ require 'spec_helper' require 'legion/cache/cacheable' +require 'legion/cache/local' RSpec.describe Legion::Cache::Cacheable do before { described_class.memory_clear! } @@ -69,3 +70,73 @@ expect(key).to match(/\AM\.m\.[a-f0-9]{32}\z/) end end + +RSpec.describe Legion::Cache::Cacheable, 'cache_read and cache_write' do + before { described_class.memory_clear! } + + describe 'local scope' do + context 'when Legion::Cache::Local is not available' do + before do + allow(described_class).to receive(:local_cache_available?).and_return(false) + end + + it 'falls back to memory store' do + described_class.cache_write('local.key', 'value', ttl: 30, scope: :local) + expect(described_class.cache_read('local.key', scope: :local)).to eq('value') + end + end + + context 'when Legion::Cache::Local is available' do + before do + allow(described_class).to receive(:local_cache_available?).and_return(true) + allow(Legion::Cache::Local).to receive(:get).with('local.hit').and_return('cached') + allow(Legion::Cache::Local).to receive(:get).with('local.miss').and_return(nil) + allow(Legion::Cache::Local).to receive(:set) + end + + it 'reads from Local cache' do + expect(described_class.cache_read('local.hit', scope: :local)).to eq('cached') + end + + it 'falls through to memory on Local miss' do + described_class.memory_write('local.miss', 'fallback', 60) + expect(described_class.cache_read('local.miss', scope: :local)).to eq('fallback') + end + + it 'writes to Local cache' do + described_class.cache_write('local.w', 'data', ttl: 60, scope: :local) + expect(Legion::Cache::Local).to have_received(:set).with('local.w', 'data', 60) + end + end + end + + describe 'global scope' do + context 'when global cache is not available' do + before do + allow(described_class).to receive(:global_cache_available?).and_return(false) + end + + it 'falls back to memory store' do + described_class.cache_write('global.key', 'value', ttl: 30, scope: :global) + expect(described_class.cache_read('global.key', scope: :global)).to eq('value') + end + end + + context 'when global cache is available' do + before do + allow(described_class).to receive(:global_cache_available?).and_return(true) + allow(Legion::Cache).to receive(:get).with('global.hit').and_return('remote') + allow(Legion::Cache).to receive(:set) + end + + it 'reads from global cache' do + expect(described_class.cache_read('global.hit', scope: :global)).to eq('remote') + end + + it 'writes to global cache' do + described_class.cache_write('global.w', 'data', ttl: 120, scope: :global) + expect(Legion::Cache).to have_received(:set).with('global.w', 'data', 120) + end + end + end +end From ed6d01236d3187ae5ea1d7cc42bfafd052c824bd Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:43:31 -0500 Subject: [PATCH 036/108] add cache_method dsl with prepend wrapper and bypass mechanism --- lib/legion/cache/cacheable.rb | 37 ++++++++++- spec/legion/cacheable_spec.rb | 112 ++++++++++++++++++++++++++++++++++ 2 files changed, 148 insertions(+), 1 deletion(-) diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index 639ac55..f44a5da 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -5,6 +5,41 @@ module Legion module Cache module Cacheable + def self.extended(base) + base.instance_variable_set(:@_cached_methods, {}) + end + + def cached_methods + @_cached_methods ||= {} + end + + def cache_method(method_name, ttl:, scope: :local, exclude_from_key: []) + exclude_from_key |= %i[token bypass_local_method_cache] + cached_methods[method_name] = { ttl: ttl, scope: scope, exclude_from_key: exclude_from_key } + + mod_name = name || 'Anonymous' + config = cached_methods[method_name] + + wrapper = Module.new do + define_method(method_name) do |bypass_local_method_cache: false, **kwargs| + key = Legion::Cache::Cacheable.build_cache_key( + mod_name, method_name, exclude: config[:exclude_from_key], **kwargs + ) + + unless bypass_local_method_cache + cached = Legion::Cache::Cacheable.cache_read(key, scope: config[:scope]) + return cached unless cached.nil? + end + + result = super(**kwargs) + Legion::Cache::Cacheable.cache_write(key, result, ttl: config[:ttl], scope: config[:scope]) + result + end + end + + prepend wrapper + end + def self.build_cache_key(mod_name, method_name, exclude:, **kwargs) filtered = kwargs.reject { |k, _| exclude.include?(k) } args_hash = Digest::MD5.hexdigest(filtered.sort.to_s) @@ -44,7 +79,7 @@ def self.global_cache_available? end def self.local_cache_available? - defined?(Legion::Cache::Local) && Legion::Cache::Local.respond_to?(:get) + defined?(Legion::Cache::Local) && Legion::Cache::Local.respond_to?(:connected?) && Legion::Cache::Local.connected? end def self.local_cache_read(key) diff --git a/spec/legion/cacheable_spec.rb b/spec/legion/cacheable_spec.rb index a0acd56..64225d9 100644 --- a/spec/legion/cacheable_spec.rb +++ b/spec/legion/cacheable_spec.rb @@ -140,3 +140,115 @@ end end end + +RSpec.describe Legion::Cache::Cacheable, 'cache_method DSL' do + before { Legion::Cache::Cacheable.memory_clear! } + + let(:test_module) do + Module.new do + def self.name + 'TestRunner' + end + + extend Legion::Cache::Cacheable + + def fetch_data(user_id: 'me', **) + { user_id: user_id, fetched_at: Time.now.utc.to_f } + end + + cache_method :fetch_data, ttl: 60 + end + end + + let(:instance) { Object.new.extend(test_module) } + + describe 'caching behavior' do + it 'returns cached result on second call' do + first = instance.fetch_data(user_id: 'alice') + second = instance.fetch_data(user_id: 'alice') + expect(second[:fetched_at]).to eq(first[:fetched_at]) + end + + it 'caches separately for different args' do + alice = instance.fetch_data(user_id: 'alice') + bob = instance.fetch_data(user_id: 'bob') + expect(alice[:user_id]).to eq('alice') + expect(bob[:user_id]).to eq('bob') + expect(alice[:fetched_at]).not_to eq(bob[:fetched_at]) + end + + it 'does not cache across different method calls' do + mod = Module.new do + def self.name + 'MultiMethod' + end + + extend Legion::Cache::Cacheable + + def method_a(**) + { method: :a, t: Time.now.utc.to_f } + end + + def method_b(**) + { method: :b, t: Time.now.utc.to_f } + end + + cache_method :method_a, ttl: 60 + cache_method :method_b, ttl: 60 + end + obj = Object.new.extend(mod) + a = obj.method_a + b = obj.method_b + expect(a[:method]).to eq(:a) + expect(b[:method]).to eq(:b) + end + end + + describe 'bypass_local_method_cache' do + it 'skips cache read and refreshes on bypass' do + first = instance.fetch_data(user_id: 'me') + bypassed = instance.fetch_data(user_id: 'me', bypass_local_method_cache: true) + expect(bypassed[:fetched_at]).not_to eq(first[:fetched_at]) + end + + it 'writes result back to cache after bypass' do + instance.fetch_data(user_id: 'me') + bypassed = instance.fetch_data(user_id: 'me', bypass_local_method_cache: true) + cached = instance.fetch_data(user_id: 'me') + expect(cached[:fetched_at]).to eq(bypassed[:fetched_at]) + end + end + + describe 'exclude_from_key' do + let(:token_module) do + Module.new do + def self.name + 'TokenRunner' + end + + extend Legion::Cache::Cacheable + + def get_thing(id:, token: nil, **) + { id: id, t: Time.now.utc.to_f } + end + + cache_method :get_thing, ttl: 60, exclude_from_key: [:token] + end + end + + let(:token_instance) { Object.new.extend(token_module) } + + it 'ignores excluded args when building cache key' do + first = token_instance.get_thing(id: 1, token: 'abc') + second = token_instance.get_thing(id: 1, token: 'xyz') + expect(second[:t]).to eq(first[:t]) + end + end + + describe 'cached_methods registry' do + it 'tracks declared cached methods' do + expect(test_module.cached_methods).to have_key(:fetch_data) + expect(test_module.cached_methods[:fetch_data][:ttl]).to eq(60) + end + end +end From 36b42123945416bf74054f7f3256768c75a4a6a3 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:45:49 -0500 Subject: [PATCH 037/108] wire cacheable into legion-cache require chain --- lib/legion/cache.rb | 1 + lib/legion/cache/cacheable.rb | 6 +++--- spec/legion/cacheable_spec.rb | 12 +++++++++++- 3 files changed, 15 insertions(+), 4 deletions(-) diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 54e0012..800ff62 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -2,6 +2,7 @@ require 'legion/cache/version' require 'legion/cache/settings' +require 'legion/cache/cacheable' require 'legion/cache/memcached' require 'legion/cache/redis' diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index f44a5da..c919bb2 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -6,11 +6,11 @@ module Legion module Cache module Cacheable def self.extended(base) - base.instance_variable_set(:@_cached_methods, {}) + base.instance_variable_set(:@cached_methods, {}) end def cached_methods - @_cached_methods ||= {} + @cached_methods ||= {} end def cache_method(method_name, ttl:, scope: :local, exclude_from_key: []) @@ -41,7 +41,7 @@ def cache_method(method_name, ttl:, scope: :local, exclude_from_key: []) end def self.build_cache_key(mod_name, method_name, exclude:, **kwargs) - filtered = kwargs.reject { |k, _| exclude.include?(k) } + filtered = kwargs.except(*exclude) args_hash = Digest::MD5.hexdigest(filtered.sort.to_s) "#{mod_name}.#{method_name}.#{args_hash}" end diff --git a/spec/legion/cacheable_spec.rb b/spec/legion/cacheable_spec.rb index 64225d9..f8626e2 100644 --- a/spec/legion/cacheable_spec.rb +++ b/spec/legion/cacheable_spec.rb @@ -228,7 +228,7 @@ def self.name extend Legion::Cache::Cacheable - def get_thing(id:, token: nil, **) + def get_thing(id:, token: nil, **) # rubocop:disable Lint/UnusedMethodArgument { id: id, t: Time.now.utc.to_f } end @@ -252,3 +252,13 @@ def get_thing(id:, token: nil, **) end end end + +RSpec.describe 'Cacheable autoload' do + it 'is accessible after requiring legion/cache' do + require 'legion/cache' + expect(Legion::Cache::Cacheable).to be_a(Module) + expect(Legion::Cache::Cacheable).to respond_to(:cache_read) + expect(Legion::Cache::Cacheable).to respond_to(:build_cache_key) + expect(Legion::Cache::Cacheable).to respond_to(:memory_clear!) + end +end From db7f95a7cf2eeea0931d221f481259e2cf40408b Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 13:46:38 -0500 Subject: [PATCH 038/108] bump to 1.3.2, add changelog and docs for cacheable --- CHANGELOG.md | 10 ++++++++++ README.md | 29 ++++++++++++++++++++++++++++- lib/legion/cache/version.rb | 2 +- 3 files changed, 39 insertions(+), 2 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index a130816..954134d 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,15 @@ # Changelog +## [1.3.2] - 2026-03-20 + +### Added +- `Legion::Cache::Cacheable` module for transparent method-level caching +- `cache_method` DSL: declare cached methods with TTL, scope, and key exclusions +- `build_cache_key`: deterministic MD5-based cache keys from module path + method + filtered args +- `bypass_local_method_cache:` kwarg for force-refresh on cached methods +- In-memory fallback store with TTL expiry when no cache backend is available +- `memory_clear!` class method for test isolation + ## [1.3.1] - 2026-03-20 ### Added diff --git a/README.md b/README.md index ba81fe0..d85ef1d 100644 --- a/README.md +++ b/README.md @@ -2,7 +2,7 @@ Caching wrapper for the [LegionIO](https://github.com/LegionIO/LegionIO) framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. -**Version**: 1.3.1 +**Version**: 1.3.2 ## Installation @@ -117,6 +117,33 @@ Both `server` (singular string) and `servers` (array) are accepted and merged. D Override via `Legion::Settings[:cache_local]`. +## Method Caching + +Runner modules can use `cache_method` to transparently cache method results with TTL: + +```ruby +module Runners::Presence + extend Legion::Cache::Cacheable + + cache_method :get_presence, ttl: 300, exclude_from_key: [:token] + + def get_presence(user_id: 'me', **) + conn = graph_connection(**) + response = conn.get("#{user_path(user_id)}/presence") + { availability: response.body['availability'], activity: response.body['activity'] } + end +end +``` + +Every caller of `get_presence` gets cached results for 5 minutes. Use `bypass_local_method_cache: true` to force-refresh: + +```ruby +runner.get_presence(user_id: 'me') # cached +runner.get_presence(user_id: 'me', bypass_local_method_cache: true) # fresh +``` + +Options: `ttl:` (seconds), `scope:` (`:local` or `:global`), `exclude_from_key:` (args to ignore in cache key). Falls back to in-memory store when no cache backend is available. + ## Pool API ```ruby diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index f8badc5..0c07182 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.1' + VERSION = '1.3.2' end end From b797ad0770a98338db8db62d87ba98da8067d5e0 Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 20 Mar 2026 22:37:55 -0500 Subject: [PATCH 039/108] fix serializer option not flowing through to Dalli::Client --- CHANGELOG.md | 5 +++++ lib/legion/cache/memcached.rb | 1 + lib/legion/cache/version.rb | 2 +- 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 954134d..d625c1b 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,10 @@ # Changelog +## [1.3.3] - 2026-03-20 + +### Fixed +- Serializer option (`Legion::JSON`) now correctly flows through to `Dalli::Client.new`, preventing Dalli from falling back to Marshal and emitting a security warning + ## [1.3.2] - 2026-03-20 ### Added diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index f172339..4e62ce2 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -25,6 +25,7 @@ def client(server: nil, servers: nil, **opts) Dalli.logger = Legion::Logging cache_opts = settings.merge(opts) cache_opts[:value_max_bytes] ||= 8 * 1024 * 1024 + cache_opts[:serializer] ||= Legion::JSON @client = ConnectionPool.new(size: pool_size, timeout: timeout) do Dalli::Client.new(resolved, cache_opts) diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 0c07182..7a8c8dd 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.2' + VERSION = '1.3.3' end end From b3062a4cf303d517c1bfe29438b229970d38fb6a Mon Sep 17 00:00:00 2001 From: Esity Date: Sat, 21 Mar 2026 18:28:39 -0500 Subject: [PATCH 040/108] add redis cluster mode support (v1.3.4) accepts cluster: keyword (array of node URLs) for Redis Cluster deployments. falls back to single-node mode when cluster is nil or empty. 6 new specs, 160 total passing. --- lib/legion/cache/redis.rb | 24 ++++++++----- lib/legion/cache/version.rb | 2 +- spec/legion/redis_spec.rb | 67 +++++++++++++++++++++++++++++++++++++ 3 files changed, 84 insertions(+), 9 deletions(-) diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index b903cad..73f747f 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -10,24 +10,32 @@ module Redis include Legion::Cache::Pool extend self # rubocop:disable Style/ModuleFunction - def client(pool_size: 20, timeout: 5, server: nil, servers: [], **) + def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, **) # rubocop:disable Metrics/ParameterLists return @client unless @client.nil? @pool_size = pool_size - @timeout = timeout - - resolved = Legion::Cache::Settings.resolve_servers( - driver: 'redis', server: server, servers: servers - ) - host, port = resolved.first.split(':') + @timeout = timeout @client = ConnectionPool.new(size: pool_size, timeout: timeout) do - ::Redis.new(host: host, port: port.to_i) + build_redis_client(server: server, servers: servers, cluster: cluster) end @connected = true @client end + def build_redis_client(server: nil, servers: [], cluster: nil) + nodes = Array(cluster).compact + if nodes.any? + ::Redis.new(cluster: nodes) + else + resolved = Legion::Cache::Settings.resolve_servers( + driver: 'redis', server: server, servers: servers + ) + host, port = resolved.first.split(':') + ::Redis.new(host: host, port: port.to_i) + end + end + def get(key) client.with { |conn| conn.get(key) } end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 7a8c8dd..67d223a 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.3' + VERSION = '1.3.4' end end diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index 82a6620..940ab6b 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -59,4 +59,71 @@ it 'wont use bogus methods' do expect(@cache).not_to respond_to :this_is_fake end + + describe '#build_redis_client' do + before do + @cache.instance_variable_set(:@client, nil) + @cache.instance_variable_set(:@connected, false) + end + + after do + @cache.instance_variable_set(:@client, nil) + @cache.instance_variable_set(:@connected, false) + end + + it 'returns a single-node Redis client when no cluster is given' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + result = @cache.build_redis_client + expect(result).to eq redis_instance + end + + it 'returns a cluster Redis client when cluster nodes are provided' do + nodes = ['redis://node1:6379', 'redis://node2:6379', 'redis://node3:6379'] + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(cluster: nodes).and_return(redis_instance) + result = @cache.build_redis_client(cluster: nodes) + expect(result).to eq redis_instance + end + + it 'falls back to single-node when cluster is an empty array' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + result = @cache.build_redis_client(cluster: []) + expect(result).to eq redis_instance + end + + it 'falls back to single-node when cluster is nil' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + result = @cache.build_redis_client(cluster: nil) + expect(result).to eq redis_instance + end + + it 'passes cluster nodes verbatim to Redis.new' do + nodes = ['redis://10.0.0.1:6379', 'redis://10.0.0.2:6380'] + expect(Redis).to receive(:new).with(cluster: nodes).and_return(instance_double(Redis)) + @cache.build_redis_client(cluster: nodes) + end + end + + describe '#client with cluster:' do + before do + @cache.instance_variable_set(:@client, nil) + @cache.instance_variable_set(:@connected, false) + end + + after do + @cache.instance_variable_set(:@client, nil) + @cache.instance_variable_set(:@connected, false) + end + + it 'creates a ConnectionPool using cluster nodes when cluster: is passed' do + nodes = ['redis://node1:6379', 'redis://node2:6379'] + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(cluster: nodes).and_return(redis_instance) + expect { @cache.client(cluster: nodes) }.not_to raise_error + expect(@cache.connected?).to eq true + end + end end From bb6ca5de0213bf440530331e7367edb79c3ff3db Mon Sep 17 00:00:00 2001 From: Esity Date: Sat, 21 Mar 2026 20:56:19 -0500 Subject: [PATCH 041/108] feat: add TLS support to Redis and Memcached cache drivers Both drivers resolve TLS config via Legion::Crypt::TLS.resolve (guarded). Redis gets ssl: true + ssl_params, Memcached gets ssl_context. Port-based auto-detection for 6380 (Redis) and 11207 (Memcached). Bump to 1.3.5. --- CHANGELOG.md | 7 +++ lib/legion/cache/memcached.rb | 28 +++++++++++- lib/legion/cache/redis.rb | 31 ++++++++++++- lib/legion/cache/version.rb | 2 +- spec/legion/cache/memcached_tls_spec.rb | 52 +++++++++++++++++++++ spec/legion/cache/redis_tls_spec.rb | 61 +++++++++++++++++++++++++ 6 files changed, 177 insertions(+), 4 deletions(-) create mode 100644 spec/legion/cache/memcached_tls_spec.rb create mode 100644 spec/legion/cache/redis_tls_spec.rb diff --git a/CHANGELOG.md b/CHANGELOG.md index d625c1b..ce34045 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,12 @@ # Changelog +## [1.3.5] - 2026-03-21 + +### Added +- TLS support for Redis driver: `ssl: true` + `ssl_params` when TLS enabled via `Legion::Crypt::TLS.resolve` +- TLS support for Memcached driver: `ssl_context` option when TLS enabled via `Legion::Crypt::TLS.resolve` +- Port-based auto-detection: Redis TLS port 6380, Memcached TLS port 11207 + ## [1.3.3] - 2026-03-20 ### Fixed diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 4e62ce2..b29eed5 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -1,5 +1,6 @@ # frozen_string_literal: true +require 'openssl' require 'dalli' require 'legion/cache/pool' @@ -7,7 +8,7 @@ module Legion module Cache module Memcached include Legion::Cache::Pool - extend self # rubocop:disable Style/ModuleFunction + extend self def client(server: nil, servers: nil, **opts) return @client unless @client.nil? @@ -27,6 +28,9 @@ def client(server: nil, servers: nil, **opts) cache_opts[:value_max_bytes] ||= 8 * 1024 * 1024 cache_opts[:serializer] ||= Legion::JSON + tls_ctx = memcached_tls_context(port: resolved.first.split(':').last.to_i) + cache_opts[:ssl_context] = tls_ctx if tls_ctx + @client = ConnectionPool.new(size: pool_size, timeout: timeout) do Dalli::Client.new(resolved, cache_opts) end @@ -62,6 +66,28 @@ def delete(key) def flush(delay = 0) client.with { |conn| conn.flush(delay).first } end + + private + + def memcached_tls_context(port:) + return nil unless defined?(Legion::Crypt::TLS) + + tls = Legion::Crypt::TLS.resolve(memcached_tls_settings, port: port) + return nil unless tls[:enabled] + + ctx = OpenSSL::SSL::SSLContext.new + ctx.verify_mode = tls[:verify] == :none ? OpenSSL::SSL::VERIFY_NONE : OpenSSL::SSL::VERIFY_PEER + ctx.ca_file = tls[:ca] if tls[:ca] + ctx + end + + def memcached_tls_settings + return {} unless defined?(Legion::Settings) + + Legion::Settings[:cache][:tls] || {} + rescue StandardError + {} + end end end end diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 73f747f..2c108c5 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -1,5 +1,6 @@ # frozen_string_literal: true +require 'openssl' require 'redis' require 'legion/cache/pool' require 'legion/cache/settings' @@ -8,7 +9,7 @@ module Legion module Cache module Redis include Legion::Cache::Pool - extend self # rubocop:disable Style/ModuleFunction + extend self def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, **) # rubocop:disable Metrics/ParameterLists return @client unless @client.nil? @@ -32,10 +33,36 @@ def build_redis_client(server: nil, servers: [], cluster: nil) driver: 'redis', server: server, servers: servers ) host, port = resolved.first.split(':') - ::Redis.new(host: host, port: port.to_i) + redis_opts = { host: host, port: port.to_i } + redis_opts.merge!(redis_tls_options(port: port.to_i)) + ::Redis.new(**redis_opts) end end + private + + def redis_tls_options(port:) + return {} unless defined?(Legion::Crypt::TLS) + + tls = Legion::Crypt::TLS.resolve(cache_tls_settings, port: port) + return {} unless tls[:enabled] + + ssl_params = { + verify_mode: tls[:verify] == :none ? OpenSSL::SSL::VERIFY_NONE : OpenSSL::SSL::VERIFY_PEER + } + ssl_params[:ca_file] = tls[:ca] if tls[:ca] + + { ssl: true, ssl_params: ssl_params } + end + + def cache_tls_settings + return {} unless defined?(Legion::Settings) + + Legion::Settings[:cache][:tls] || {} + rescue StandardError + {} + end + def get(key) client.with { |conn| conn.get(key) } end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 67d223a..f22feb3 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.4' + VERSION = '1.3.5' end end diff --git a/spec/legion/cache/memcached_tls_spec.rb b/spec/legion/cache/memcached_tls_spec.rb new file mode 100644 index 0000000..59d6db2 --- /dev/null +++ b/spec/legion/cache/memcached_tls_spec.rb @@ -0,0 +1,52 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/memcached' + +RSpec.describe 'Legion::Cache::Memcached TLS' do + let(:mc_mod) { Legion::Cache::Memcached.dup } + + before do + stub_const('Legion::Crypt::TLS', Module.new) + allow(Legion::Cache::Settings).to receive(:resolve_servers).and_return(['127.0.0.1:11211']) + allow(Dalli).to receive(:logger=) + end + + after { mc_mod.instance_variable_set(:@client, nil) } + + describe 'TLS options passed to Dalli::Client' do + it 'passes ssl_context when TLS is enabled' do + allow(Legion::Crypt::TLS).to receive(:resolve).and_return( + { enabled: true, verify: :peer, ca: '/ca.crt', cert: nil, key: nil, auto_detected: false } + ) + expect(Dalli::Client).to receive(:new) do |_servers, opts| + expect(opts[:ssl_context]).to be_a(OpenSSL::SSL::SSLContext) + end.and_return(double(alive!: true)) + allow(ConnectionPool).to receive(:new).and_yield + + mc_mod.client + end + + it 'skips ssl_context when TLS is disabled' do + allow(Legion::Crypt::TLS).to receive(:resolve).and_return( + { enabled: false, verify: :peer, ca: nil, cert: nil, key: nil, auto_detected: false } + ) + expect(Dalli::Client).to receive(:new) do |_servers, opts| + expect(opts).not_to have_key(:ssl_context) + end.and_return(double(alive!: true)) + allow(ConnectionPool).to receive(:new).and_yield + + mc_mod.client + end + + it 'skips ssl_context when Legion::Crypt::TLS is not defined' do + hide_const('Legion::Crypt::TLS') + expect(Dalli::Client).to receive(:new) do |_servers, opts| + expect(opts).not_to have_key(:ssl_context) + end.and_return(double(alive!: true)) + allow(ConnectionPool).to receive(:new).and_yield + + mc_mod.client + end + end +end diff --git a/spec/legion/cache/redis_tls_spec.rb b/spec/legion/cache/redis_tls_spec.rb new file mode 100644 index 0000000..7350810 --- /dev/null +++ b/spec/legion/cache/redis_tls_spec.rb @@ -0,0 +1,61 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/redis' + +RSpec.describe 'Legion::Cache::Redis TLS' do + let(:redis_mod) { Legion::Cache::Redis.dup } + + before do + stub_const('Legion::Crypt::TLS', Module.new) + end + + after { redis_mod.instance_variable_set(:@client, nil) } + + describe 'TLS options passed to Redis.new' do + before do + allow(Legion::Cache::Settings).to receive(:resolve_servers).and_return(['127.0.0.1:6379']) + end + + it 'passes ssl: true when TLS is enabled' do + allow(Legion::Crypt::TLS).to receive(:resolve).and_return( + { enabled: true, verify: :peer, ca: '/ca.crt', cert: nil, key: nil, auto_detected: false } + ) + expect(Redis).to receive(:new).with(hash_including(ssl: true)).and_return(double(connected?: true)) + allow(ConnectionPool).to receive(:new).and_yield + + redis_mod.client + end + + it 'passes ssl_params with verify mode when TLS is enabled' do + allow(Legion::Crypt::TLS).to receive(:resolve).and_return( + { enabled: true, verify: :peer, ca: '/ca.crt', cert: nil, key: nil, auto_detected: false } + ) + expect(Redis).to receive(:new) do |opts| + expect(opts[:ssl]).to be true + expect(opts[:ssl_params][:ca_file]).to eq '/ca.crt' + end.and_return(double(connected?: true)) + allow(ConnectionPool).to receive(:new).and_yield + + redis_mod.client + end + + it 'skips TLS when disabled' do + allow(Legion::Crypt::TLS).to receive(:resolve).and_return( + { enabled: false, verify: :peer, ca: nil, cert: nil, key: nil, auto_detected: false } + ) + expect(Redis).to receive(:new).with(hash_not_including(ssl: true)).and_return(double(connected?: true)) + allow(ConnectionPool).to receive(:new).and_yield + + redis_mod.client + end + + it 'skips TLS when Legion::Crypt::TLS is not defined' do + hide_const('Legion::Crypt::TLS') + expect(Redis).to receive(:new).with(hash_not_including(ssl: true)).and_return(double(connected?: true)) + allow(ConnectionPool).to receive(:new).and_yield + + redis_mod.client + end + end +end From f4b525e67215592f1355a8dd9b49cc6213eb44a9 Mon Sep 17 00:00:00 2001 From: Esity Date: Sat, 21 Mar 2026 21:12:28 -0500 Subject: [PATCH 042/108] add redis cluster mode support: replica, mget/mset, failover logging - cluster client options: replica, fixed_hostname pass-through - slot-aware mget/mset with automatic cross-slot grouping - cluster-aware flush iterates all primary nodes - failover logging on Redis::BaseError via Legion::Logging - settings defaults for cluster, replica, fixed_hostname - 33 new specs (200 total), 98.53% coverage --- .rubocop.yml | 3 + CHANGELOG.md | 13 + lib/legion/cache/redis.rb | 152 +++++++++-- lib/legion/cache/settings.rb | 29 ++- lib/legion/cache/version.rb | 2 +- spec/legion/cache/redis_cluster_spec.rb | 329 ++++++++++++++++++++++++ spec/legion/redis_spec.rb | 6 +- 7 files changed, 494 insertions(+), 40 deletions(-) create mode 100644 spec/legion/cache/redis_cluster_spec.rb diff --git a/.rubocop.yml b/.rubocop.yml index 0a20563..80fdf88 100644 --- a/.rubocop.yml +++ b/.rubocop.yml @@ -48,3 +48,6 @@ Style/FrozenStringLiteralComment: Naming/FileName: Enabled: false + +Naming/PredicateMethod: + Enabled: false diff --git a/CHANGELOG.md b/CHANGELOG.md index ce34045..632e2d3 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,18 @@ # Changelog +## [1.3.6] - 2026-03-21 + +### Added +- Redis Cluster mode: `cluster:`, `replica:`, `fixed_hostname:` options in `build_redis_client` +- `cluster_mode?` predicate for runtime cluster detection +- `mget(*keys)` and `mset(hash)` with automatic slot-aware grouping for cross-slot operations +- Cluster-aware `flush` that iterates all primary nodes via `CLUSTER NODES` +- Failover logging: `Redis::BaseError` rescues log via `Legion::Logging.warn` before re-raising +- Settings defaults: `cluster: nil`, `replica: false`, `fixed_hostname: nil` + +### Fixed +- `get`, `set`, `delete`, `flush` visibility changed from private to public (were inaccessible on the module directly) + ## [1.3.5] - 2026-03-21 ### Added diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 2c108c5..73364d9 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -11,23 +11,28 @@ module Redis include Legion::Cache::Pool extend self - def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, **) # rubocop:disable Metrics/ParameterLists + def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, replica: false, fixed_hostname: nil, **) # rubocop:disable Metrics/ParameterLists return @client unless @client.nil? @pool_size = pool_size @timeout = timeout + @cluster_mode = Array(cluster).compact.any? @client = ConnectionPool.new(size: pool_size, timeout: timeout) do - build_redis_client(server: server, servers: servers, cluster: cluster) + build_redis_client(server: server, servers: servers, cluster: cluster, + replica: replica, fixed_hostname: fixed_hostname) end @connected = true @client end - def build_redis_client(server: nil, servers: [], cluster: nil) + def build_redis_client(server: nil, servers: [], cluster: nil, replica: false, fixed_hostname: nil) nodes = Array(cluster).compact if nodes.any? - ::Redis.new(cluster: nodes) + opts = { cluster: nodes } + opts[:replica] = true if replica + opts[:fixed_hostname] = fixed_hostname unless fixed_hostname.nil? + ::Redis.new(**opts) else resolved = Legion::Cache::Settings.resolve_servers( driver: 'redis', server: server, servers: servers @@ -39,8 +44,128 @@ def build_redis_client(server: nil, servers: [], cluster: nil) end end + def cluster_mode? + @cluster_mode == true + end + + def get(key) + client.with { |conn| conn.get(key) } + rescue ::Redis::BaseError => e + log_cluster_error(e) + raise + end + alias fetch get + + def set(key, value, ttl: nil) + args = {} + args[:ex] = ttl unless ttl.nil? + client.with { |conn| conn.set(key, value, **args) == 'OK' } + rescue ::Redis::BaseError => e + log_cluster_error(e) + raise + end + + def delete(key) + client.with { |conn| conn.del(key) == 1 } + rescue ::Redis::BaseError => e + log_cluster_error(e) + raise + end + + def flush + client.with do |conn| + if cluster_mode? + cluster_flush(conn) + else + conn.flushdb == 'OK' + end + end + rescue ::Redis::BaseError => e + log_cluster_error(e) + raise + end + + def mget(*keys) + keys = keys.flatten + return {} if keys.empty? + + client.with do |conn| + if cluster_mode? + cluster_mget(conn, keys) + else + result = conn.mget(*keys) + keys.zip(result).to_h + end + end + rescue ::Redis::BaseError => e + log_cluster_error(e) + raise + end + + def mset(hash) + return true if hash.empty? + + client.with do |conn| + if cluster_mode? + cluster_mset(conn, hash) + else + conn.mset(*hash.flatten) == 'OK' + end + end + rescue ::Redis::BaseError => e + log_cluster_error(e) + raise + end + private + def cluster_mget(conn, keys) + groups = group_keys_by_slot(keys) + result = {} + groups.each_value do |group_keys| + values = conn.mget(*group_keys) + group_keys.zip(values).each { |k, v| result[k] = v } + end + result + end + + def cluster_mset(conn, hash) + groups = group_keys_by_slot(hash.keys) + groups.each_value do |group_keys| + pairs = group_keys.flat_map { |k| [k, hash[k]] } + conn.mset(*pairs) + end + true + end + + def cluster_flush(conn) + node_info = conn.cluster('nodes') + primaries = node_info.lines.select { |l| l.include?('master') }.map { |l| l.split[1].split('@').first } + primaries.each do |addr| + host, port = addr.split(':') + node = ::Redis.new(host: host, port: port.to_i) + node.flushdb + node.close + end + true + rescue StandardError + conn.flushdb == 'OK' + end + + def group_keys_by_slot(keys) + if defined?(::Redis::Cluster::KeySlotConverter) + keys.group_by { |k| ::Redis::Cluster::KeySlotConverter.convert(k) } + else + { 0 => keys } + end + end + + def log_cluster_error(error) + return unless defined?(Legion::Logging) + + Legion::Logging.warn "Redis cluster error: #{error.class} — #{error.message}" + end + def redis_tls_options(port:) return {} unless defined?(Legion::Crypt::TLS) @@ -62,25 +187,6 @@ def cache_tls_settings rescue StandardError {} end - - def get(key) - client.with { |conn| conn.get(key) } - end - alias fetch get - - def set(key, value, ttl: nil) - args = {} - args[:ex] = ttl unless ttl.nil? - client.with { |conn| conn.set(key, value, **args) == 'OK' } - end - - def delete(key) - client.with { |conn| conn.del(key) == 1 } - end - - def flush - client.with { |conn| conn.flushdb == 'OK' } - end end end end diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index b5a2bbd..75678eb 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -13,19 +13,22 @@ module Settings Legion::Settings.merge_settings(:cache_local, local) if Legion::Settings.method_defined? :merge_settings def self.default { - driver: driver, - servers: resolve_servers(driver: driver), - connected: false, - enabled: true, - namespace: 'legion', - compress: false, - failover: true, - threadsafe: true, - expires_in: 0, - cache_nils: false, - pool_size: 10, - timeout: 5, - serializer: Legion::JSON + driver: driver, + servers: resolve_servers(driver: driver), + connected: false, + enabled: true, + namespace: 'legion', + compress: false, + failover: true, + threadsafe: true, + expires_in: 0, + cache_nils: false, + pool_size: 10, + timeout: 5, + serializer: Legion::JSON, + cluster: nil, + replica: false, + fixed_hostname: nil } end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index f22feb3..44c7a2f 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.5' + VERSION = '1.3.6' end end diff --git a/spec/legion/cache/redis_cluster_spec.rb b/spec/legion/cache/redis_cluster_spec.rb new file mode 100644 index 0000000..b2b65f8 --- /dev/null +++ b/spec/legion/cache/redis_cluster_spec.rb @@ -0,0 +1,329 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/redis' + +RSpec.describe Legion::Cache::Redis, 'cluster mode' do + before do + described_class.instance_variable_set(:@client, nil) + described_class.instance_variable_set(:@connected, false) + described_class.instance_variable_set(:@cluster_mode, nil) + end + + after do + described_class.instance_variable_set(:@client, nil) + described_class.instance_variable_set(:@connected, false) + described_class.instance_variable_set(:@cluster_mode, nil) + end + + let(:cluster_nodes) { ['redis://node1:6379', 'redis://node2:6379', 'redis://node3:6379'] } + + describe '#build_redis_client cluster options' do + it 'passes cluster nodes to Redis.new' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(cluster: cluster_nodes).and_return(redis_instance) + result = described_class.build_redis_client(cluster: cluster_nodes) + expect(result).to eq redis_instance + end + + it 'passes replica: true when replica is enabled' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(cluster: cluster_nodes, replica: true).and_return(redis_instance) + result = described_class.build_redis_client(cluster: cluster_nodes, replica: true) + expect(result).to eq redis_instance + end + + it 'passes fixed_hostname when provided' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(cluster: cluster_nodes, fixed_hostname: 'redis.internal').and_return(redis_instance) + result = described_class.build_redis_client(cluster: cluster_nodes, fixed_hostname: 'redis.internal') + expect(result).to eq redis_instance + end + + it 'passes all cluster options together' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(cluster: cluster_nodes, replica: true, fixed_hostname: 'redis.internal').and_return(redis_instance) + result = described_class.build_redis_client(cluster: cluster_nodes, replica: true, fixed_hostname: 'redis.internal') + expect(result).to eq redis_instance + end + + it 'omits replica when false' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(cluster: cluster_nodes).and_return(redis_instance) + result = described_class.build_redis_client(cluster: cluster_nodes, replica: false) + expect(result).to eq redis_instance + end + + it 'omits fixed_hostname when nil' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(cluster: cluster_nodes).and_return(redis_instance) + result = described_class.build_redis_client(cluster: cluster_nodes, fixed_hostname: nil) + expect(result).to eq redis_instance + end + + it 'falls back to single-node when cluster is empty' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + result = described_class.build_redis_client(cluster: []) + expect(result).to eq redis_instance + end + + it 'falls back to single-node when cluster contains only nils' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + result = described_class.build_redis_client(cluster: [nil, nil]) + expect(result).to eq redis_instance + end + end + + describe '#cluster_mode?' do + it 'returns true after connecting with cluster nodes' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).and_return(redis_instance) + described_class.client(cluster: cluster_nodes) + expect(described_class.cluster_mode?).to eq true + end + + it 'returns false after connecting without cluster' do + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).and_return(redis_instance) + described_class.client(server: '127.0.0.1:6379') + expect(described_class.cluster_mode?).to eq false + end + + it 'returns false before any connection' do + expect(described_class.cluster_mode?).to eq false + end + end + + describe '#mget' do + let(:redis_conn) { instance_double(Redis) } + let(:pool) { instance_double(ConnectionPool) } + + before do + described_class.instance_variable_set(:@client, pool) + described_class.instance_variable_set(:@connected, true) + allow(pool).to receive(:with).and_yield(redis_conn) + end + + context 'standalone mode' do + before { described_class.instance_variable_set(:@cluster_mode, false) } + + it 'returns a hash of key-value pairs' do + allow(redis_conn).to receive(:mget).with('a', 'b', 'c').and_return(%w[1 2 3]) + result = described_class.mget('a', 'b', 'c') + expect(result).to eq({ 'a' => '1', 'b' => '2', 'c' => '3' }) + end + + it 'returns empty hash for empty keys' do + result = described_class.mget + expect(result).to eq({}) + end + + it 'handles nil values in results' do + allow(redis_conn).to receive(:mget).with('a', 'b').and_return(['1', nil]) + result = described_class.mget('a', 'b') + expect(result).to eq({ 'a' => '1', 'b' => nil }) + end + + it 'accepts keys as an array' do + allow(redis_conn).to receive(:mget).with('x', 'y').and_return(%w[10 20]) + result = described_class.mget(%w[x y]) + expect(result).to eq({ 'x' => '10', 'y' => '20' }) + end + end + + context 'cluster mode' do + before { described_class.instance_variable_set(:@cluster_mode, true) } + + it 'groups keys by slot and merges results' do + converter = class_double('Redis::Cluster::KeySlotConverter').as_stubbed_const + allow(converter).to receive(:convert).with('a').and_return(0) + allow(converter).to receive(:convert).with('b').and_return(1) + allow(converter).to receive(:convert).with('c').and_return(0) + + allow(redis_conn).to receive(:mget).with('a', 'c').and_return(%w[1 3]) + allow(redis_conn).to receive(:mget).with('b').and_return(['2']) + + result = described_class.mget('a', 'b', 'c') + expect(result).to eq({ 'a' => '1', 'b' => '2', 'c' => '3' }) + end + + it 'handles single-slot keys normally' do + converter = class_double('Redis::Cluster::KeySlotConverter').as_stubbed_const + allow(converter).to receive(:convert).and_return(5) + + allow(redis_conn).to receive(:mget).with('x', 'y').and_return(%w[10 20]) + + result = described_class.mget('x', 'y') + expect(result).to eq({ 'x' => '10', 'y' => '20' }) + end + end + end + + describe '#mset' do + let(:redis_conn) { instance_double(Redis) } + let(:pool) { instance_double(ConnectionPool) } + + before do + described_class.instance_variable_set(:@client, pool) + described_class.instance_variable_set(:@connected, true) + allow(pool).to receive(:with).and_yield(redis_conn) + end + + context 'standalone mode' do + before { described_class.instance_variable_set(:@cluster_mode, false) } + + it 'sets all key-value pairs' do + allow(redis_conn).to receive(:mset).with('a', '1', 'b', '2').and_return('OK') + result = described_class.mset({ 'a' => '1', 'b' => '2' }) + expect(result).to eq true + end + + it 'returns true for empty hash' do + result = described_class.mset({}) + expect(result).to eq true + end + end + + context 'cluster mode' do + before { described_class.instance_variable_set(:@cluster_mode, true) } + + it 'groups keys by slot and sets per group' do + converter = class_double('Redis::Cluster::KeySlotConverter').as_stubbed_const + allow(converter).to receive(:convert).with('a').and_return(0) + allow(converter).to receive(:convert).with('b').and_return(1) + + allow(redis_conn).to receive(:mset).with('a', '1').and_return('OK') + allow(redis_conn).to receive(:mset).with('b', '2').and_return('OK') + + result = described_class.mset({ 'a' => '1', 'b' => '2' }) + expect(result).to eq true + end + + it 'handles same-slot keys in single call' do + converter = class_double('Redis::Cluster::KeySlotConverter').as_stubbed_const + allow(converter).to receive(:convert).and_return(5) + + allow(redis_conn).to receive(:mset).with('x', '10', 'y', '20').and_return('OK') + + result = described_class.mset({ 'x' => '10', 'y' => '20' }) + expect(result).to eq true + end + end + end + + describe 'failover logging' do + let(:redis_conn) { instance_double(Redis) } + let(:pool) { instance_double(ConnectionPool) } + + before do + described_class.instance_variable_set(:@client, pool) + described_class.instance_variable_set(:@connected, true) + described_class.instance_variable_set(:@cluster_mode, false) + allow(pool).to receive(:with).and_yield(redis_conn) + end + + it 'logs warning on Redis::BaseError and re-raises from get' do + allow(redis_conn).to receive(:get).and_raise(Redis::BaseError, 'node down') + allow(Legion::Logging).to receive(:warn) + expect { described_class.send(:get, 'key') }.to raise_error(Redis::BaseError) + expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*node down/) + end + + it 'logs warning on Redis::BaseError and re-raises from set' do + allow(redis_conn).to receive(:set).and_raise(Redis::BaseError, 'write failed') + allow(Legion::Logging).to receive(:warn) + expect { described_class.send(:set, 'key', 'val') }.to raise_error(Redis::BaseError) + expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*write failed/) + end + + it 'logs warning on Redis::BaseError and re-raises from delete' do + allow(redis_conn).to receive(:del).and_raise(Redis::BaseError, 'conn lost') + allow(Legion::Logging).to receive(:warn) + expect { described_class.send(:delete, 'key') }.to raise_error(Redis::BaseError) + expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*conn lost/) + end + + it 'logs warning on Redis::BaseError and re-raises from mget' do + allow(redis_conn).to receive(:mget).and_raise(Redis::BaseError, 'cluster fail') + allow(Legion::Logging).to receive(:warn) + expect { described_class.mget('a') }.to raise_error(Redis::BaseError) + expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*cluster fail/) + end + + it 'logs warning on Redis::BaseError and re-raises from mset' do + allow(redis_conn).to receive(:mset).and_raise(Redis::BaseError, 'cluster fail') + allow(Legion::Logging).to receive(:warn) + expect { described_class.mset({ 'a' => '1' }) }.to raise_error(Redis::BaseError) + expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*cluster fail/) + end + + it 'does not call logging when Legion::Logging is not defined' do + hide_const('Legion::Logging') + allow(redis_conn).to receive(:get).and_raise(Redis::BaseError, 'test') + expect { described_class.send(:get, 'key') }.to raise_error(Redis::BaseError) + end + + it 'logs warning on Redis::BaseError and re-raises from flush' do + allow(redis_conn).to receive(:flushdb).and_raise(Redis::BaseError, 'flush fail') + allow(Legion::Logging).to receive(:warn) + expect { described_class.flush }.to raise_error(Redis::BaseError) + expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*flush fail/) + end + end + + describe '#flush in cluster mode' do + let(:redis_conn) { instance_double(Redis) } + let(:pool) { instance_double(ConnectionPool) } + + before do + described_class.instance_variable_set(:@client, pool) + described_class.instance_variable_set(:@connected, true) + described_class.instance_variable_set(:@cluster_mode, true) + allow(pool).to receive(:with).and_yield(redis_conn) + end + + it 'flushes all primary nodes' do + node_info = "abc123 10.0.0.1:6379@16379 master - 0 0 1 connected 0-5460\ndef456 10.0.0.2:6379@16379 master - 0 0 2 connected 5461-10922\n" + allow(redis_conn).to receive(:cluster).with('nodes').and_return(node_info) + + node1 = instance_double(Redis) + node2 = instance_double(Redis) + allow(Redis).to receive(:new).with(host: '10.0.0.1', port: 6379).and_return(node1) + allow(Redis).to receive(:new).with(host: '10.0.0.2', port: 6379).and_return(node2) + allow(node1).to receive(:flushdb) + allow(node1).to receive(:close) + allow(node2).to receive(:flushdb) + allow(node2).to receive(:close) + + expect(described_class.flush).to eq true + end + + it 'falls back to single flushdb on cluster nodes error' do + allow(redis_conn).to receive(:cluster).and_raise(StandardError, 'cluster info failed') + allow(redis_conn).to receive(:flushdb).and_return('OK') + expect(described_class.flush).to eq true + end + end + + describe 'settings defaults' do + it 'includes cluster key defaulting to nil' do + defaults = Legion::Cache::Settings.default + expect(defaults).to have_key(:cluster) + expect(defaults[:cluster]).to be_nil + end + + it 'includes replica key defaulting to false' do + defaults = Legion::Cache::Settings.default + expect(defaults).to have_key(:replica) + expect(defaults[:replica]).to eq false + end + + it 'includes fixed_hostname key defaulting to nil' do + defaults = Legion::Cache::Settings.default + expect(defaults).to have_key(:fixed_hostname) + expect(defaults[:fixed_hostname]).to be_nil + end + end +end diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index 940ab6b..5a51f11 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -81,7 +81,7 @@ it 'returns a cluster Redis client when cluster nodes are provided' do nodes = ['redis://node1:6379', 'redis://node2:6379', 'redis://node3:6379'] redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(cluster: nodes).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(cluster: nodes)).and_return(redis_instance) result = @cache.build_redis_client(cluster: nodes) expect(result).to eq redis_instance end @@ -102,7 +102,7 @@ it 'passes cluster nodes verbatim to Redis.new' do nodes = ['redis://10.0.0.1:6379', 'redis://10.0.0.2:6380'] - expect(Redis).to receive(:new).with(cluster: nodes).and_return(instance_double(Redis)) + expect(Redis).to receive(:new).with(hash_including(cluster: nodes)).and_return(instance_double(Redis)) @cache.build_redis_client(cluster: nodes) end end @@ -121,7 +121,7 @@ it 'creates a ConnectionPool using cluster nodes when cluster: is passed' do nodes = ['redis://node1:6379', 'redis://node2:6379'] redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(cluster: nodes).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(cluster: nodes)).and_return(redis_instance) expect { @cache.client(cluster: nodes) }.not_to raise_error expect(@cache.connected?).to eq true end From 9cbf1a5631759019bb9148e4be1ee2b02c052b10 Mon Sep 17 00:00:00 2001 From: Esity Date: Sun, 22 Mar 2026 10:05:34 -0500 Subject: [PATCH 043/108] add comprehensive logging across cache operations --- CHANGELOG.md | 12 +++++++++++ lib/legion/cache.rb | 3 +++ lib/legion/cache/cacheable.rb | 13 +++++++++--- lib/legion/cache/local.rb | 20 +++++++++++++----- lib/legion/cache/pool.rb | 2 ++ lib/legion/cache/redis.rb | 38 +++++++++++++++++++++++++++-------- lib/legion/cache/version.rb | 2 +- 7 files changed, 73 insertions(+), 17 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 632e2d3..7fdc9a4 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,17 @@ # Changelog +## [1.3.7] - 2026-03-22 + +### Added +- Redis driver: `.debug` logging on get (hit/miss), set (ttl/success), delete, flush, mget (key count), mset (key count) +- Redis driver: `.info` on successful client creation with host/port address +- Redis driver: private `resolved_redis_address` helper for extracting address at connect time +- Pool: `.info` on close and restart +- Cacheable: `.debug` on cache hit/miss in wrapper; `.warn` on swallowed errors in `local_cache_read`/`local_cache_write` +- Local: `.debug` on get/set/fetch/delete/flush operations +- Cache: `.info` on successful shared cache setup (driver + server) +- All new logging calls guarded with `if defined?(Legion::Logging)` for standalone use + ## [1.3.6] - 2026-03-21 ### Added diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 800ff62..b32e3b5 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -86,6 +86,9 @@ def setup_shared(**) @connected = true @using_local = false Legion::Settings[:cache][:connected] = true + driver = Legion::Settings[:cache][:driver] || 'dalli' + servers = Legion::Settings[:cache][:servers] || [] + Legion::Logging.info "Legion::Cache connected (driver=#{driver} servers=#{Array(servers).first})" if defined?(Legion::Logging) rescue StandardError => e Legion::Logging.warn "Shared cache unavailable (#{e.message}), falling back to Local" if defined?(Legion::Logging) if Legion::Cache::Local.connected? diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index c919bb2..63c0746 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -28,7 +28,12 @@ def cache_method(method_name, ttl:, scope: :local, exclude_from_key: []) unless bypass_local_method_cache cached = Legion::Cache::Cacheable.cache_read(key, scope: config[:scope]) - return cached unless cached.nil? + if cached.nil? + Legion::Logging.debug "[cacheable] miss key=#{key}" if defined?(Legion::Logging) + else + Legion::Logging.debug "[cacheable] hit key=#{key}" if defined?(Legion::Logging) + return cached + end end result = super(**kwargs) @@ -86,7 +91,8 @@ def self.local_cache_read(key) return nil unless local_cache_available? Legion::Cache::Local.get(key) - rescue StandardError + rescue StandardError => e + Legion::Logging.warn "[cacheable] local_cache_read failed key=#{key} error=#{e.message}" if defined?(Legion::Logging) nil end @@ -94,7 +100,8 @@ def self.local_cache_write(key, value, ttl) return unless local_cache_available? Legion::Cache::Local.set(key, value, ttl) - rescue StandardError + rescue StandardError => e + Legion::Logging.warn "[cacheable] local_cache_write failed key=#{key} error=#{e.message}" if defined?(Legion::Logging) nil end diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index 6603f8b..107e5b6 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -36,23 +36,33 @@ def connected? end def get(key) - @driver.get(key) + result = @driver.get(key) + Legion::Logging.debug "[cache:local] GET #{key} hit=#{!result.nil?}" if defined?(Legion::Logging) + result end def set(key, value, ttl = 180) - @driver.set(key, value, ttl) + result = @driver.set(key, value, ttl) + Legion::Logging.debug "[cache:local] SET #{key} ttl=#{ttl} success=#{result}" if defined?(Legion::Logging) + result end def fetch(key, ttl = nil) - @driver.fetch(key, ttl) + result = @driver.fetch(key, ttl) + Legion::Logging.debug "[cache:local] FETCH #{key} hit=#{!result.nil?}" if defined?(Legion::Logging) + result end def delete(key) - @driver.delete(key) + result = @driver.delete(key) + Legion::Logging.debug "[cache:local] DELETE #{key} success=#{result}" if defined?(Legion::Logging) + result end def flush(delay = 0) - @driver.flush(delay) + result = @driver.flush(delay) + Legion::Logging.debug '[cache:local] FLUSH completed' if defined?(Legion::Logging) + result end def client diff --git a/lib/legion/cache/pool.rb b/lib/legion/cache/pool.rb index 273d539..548a571 100644 --- a/lib/legion/cache/pool.rb +++ b/lib/legion/cache/pool.rb @@ -31,6 +31,7 @@ def close client.shutdown(&:close) @client = nil @connected = false + Legion::Logging.info "#{name} pool closed" if defined?(Legion::Logging) end def restart(**opts) @@ -41,6 +42,7 @@ def restart(**opts) client_hash[:timeout] = opts[:timeout] if opts.key? :timeout client(**client_hash) @connected = true + Legion::Logging.info "#{name} pool restarted" if defined?(Legion::Logging) end end end diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 73364d9..2581f30 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -23,6 +23,7 @@ def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, re replica: replica, fixed_hostname: fixed_hostname) end @connected = true + Legion::Logging.info "Redis connected to #{resolved_redis_address(server: server, servers: servers, cluster: cluster)}" if defined?(Legion::Logging) @client end @@ -49,7 +50,9 @@ def cluster_mode? end def get(key) - client.with { |conn| conn.get(key) } + result = client.with { |conn| conn.get(key) } + Legion::Logging.debug "[cache] GET #{key} hit=#{!result.nil?}" if defined?(Legion::Logging) + result rescue ::Redis::BaseError => e log_cluster_error(e) raise @@ -59,27 +62,33 @@ def get(key) def set(key, value, ttl: nil) args = {} args[:ex] = ttl unless ttl.nil? - client.with { |conn| conn.set(key, value, **args) == 'OK' } + result = client.with { |conn| conn.set(key, value, **args) == 'OK' } + Legion::Logging.debug "[cache] SET #{key} ttl=#{ttl.inspect} success=#{result}" if defined?(Legion::Logging) + result rescue ::Redis::BaseError => e log_cluster_error(e) raise end def delete(key) - client.with { |conn| conn.del(key) == 1 } + result = client.with { |conn| conn.del(key) == 1 } + Legion::Logging.debug "[cache] DELETE #{key} success=#{result}" if defined?(Legion::Logging) + result rescue ::Redis::BaseError => e log_cluster_error(e) raise end def flush - client.with do |conn| + result = client.with do |conn| if cluster_mode? cluster_flush(conn) else conn.flushdb == 'OK' end end + Legion::Logging.debug '[cache] FLUSH completed' if defined?(Legion::Logging) + result rescue ::Redis::BaseError => e log_cluster_error(e) raise @@ -89,14 +98,16 @@ def mget(*keys) keys = keys.flatten return {} if keys.empty? - client.with do |conn| + result = client.with do |conn| if cluster_mode? cluster_mget(conn, keys) else - result = conn.mget(*keys) - keys.zip(result).to_h + values = conn.mget(*keys) + keys.zip(values).to_h end end + Legion::Logging.debug "[cache] MGET keys=#{keys.size}" if defined?(Legion::Logging) + result rescue ::Redis::BaseError => e log_cluster_error(e) raise @@ -105,13 +116,15 @@ def mget(*keys) def mset(hash) return true if hash.empty? - client.with do |conn| + result = client.with do |conn| if cluster_mode? cluster_mset(conn, hash) else conn.mset(*hash.flatten) == 'OK' end end + Legion::Logging.debug "[cache] MSET keys=#{hash.size}" if defined?(Legion::Logging) + result rescue ::Redis::BaseError => e log_cluster_error(e) raise @@ -160,6 +173,15 @@ def group_keys_by_slot(keys) end end + def resolved_redis_address(server:, servers:, cluster:) + nodes = Array(cluster).compact + return nodes.join(', ') if nodes.any? + + Legion::Cache::Settings.resolve_servers(driver: 'redis', server: server, servers: Array(servers)).first + rescue StandardError + 'unknown' + end + def log_cluster_error(error) return unless defined?(Legion::Logging) diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 44c7a2f..475eb8c 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.6' + VERSION = '1.3.7' end end From f6cd0e77a3e63c28ca0f967471ec8903f7242005 Mon Sep 17 00:00:00 2001 From: Esity Date: Sun, 22 Mar 2026 10:13:03 -0500 Subject: [PATCH 044/108] add server addresses to boot connection logs --- CHANGELOG.md | 7 +++++++ lib/legion/cache.rb | 8 +++++--- lib/legion/cache/local.rb | 3 ++- lib/legion/cache/memcached.rb | 1 + lib/legion/cache/version.rb | 2 +- 5 files changed, 16 insertions(+), 5 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 7fdc9a4..a12e76e 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,12 @@ # Changelog +## [1.3.8] - 2026-03-22 + +### Changed +- Memcached driver now logs server addresses on connect +- Local cache now logs server addresses on connect +- Shared cache setup log now shows full server list instead of just first server + ## [1.3.7] - 2026-03-22 ### Added diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index b32e3b5..24edd2b 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -86,9 +86,11 @@ def setup_shared(**) @connected = true @using_local = false Legion::Settings[:cache][:connected] = true - driver = Legion::Settings[:cache][:driver] || 'dalli' - servers = Legion::Settings[:cache][:servers] || [] - Legion::Logging.info "Legion::Cache connected (driver=#{driver} servers=#{Array(servers).first})" if defined?(Legion::Logging) + if defined?(Legion::Logging) + driver = Legion::Settings[:cache][:driver] || 'dalli' + servers = Array(Legion::Settings[:cache][:servers]).join(', ') + Legion::Logging.info "Legion::Cache connected (driver=#{driver}) to #{servers}" + end rescue StandardError => e Legion::Logging.warn "Shared cache unavailable (#{e.message}), falling back to Local" if defined?(Legion::Logging) if Legion::Cache::Local.connected? diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index 107e5b6..6654f39 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -16,7 +16,8 @@ def setup(**) @driver = build_driver(driver_name) @driver.client(**settings, **) @connected = true - Legion::Logging.info "Legion::Cache::Local connected (#{driver_name})" if defined?(Legion::Logging) + servers = Array(settings[:servers]).join(', ') + Legion::Logging.info "Legion::Cache::Local connected (#{driver_name}) to #{servers}" if defined?(Legion::Logging) rescue StandardError => e Legion::Logging.warn "Legion::Cache::Local setup failed: #{e.message}" if defined?(Legion::Logging) @connected = false diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index b29eed5..3b25284 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -36,6 +36,7 @@ def client(server: nil, servers: nil, **opts) end @connected = true + Legion::Logging.info "Memcached connected to #{resolved.join(', ')}" if defined?(Legion::Logging) @client end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 475eb8c..2b54383 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.7' + VERSION = '1.3.8' end end From 80938cc14969461a8b6118e8a117ac522a73f868 Mon Sep 17 00:00:00 2001 From: Esity Date: Sun, 22 Mar 2026 10:23:11 -0500 Subject: [PATCH 045/108] add logging to silent rescue blocks --- CHANGELOG.md | 8 ++++++++ lib/legion/cache/memcached.rb | 3 ++- lib/legion/cache/redis.rb | 9 ++++++--- lib/legion/cache/settings.rb | 4 ++-- lib/legion/cache/version.rb | 2 +- 5 files changed, 19 insertions(+), 7 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index a12e76e..e3e3b80 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,13 @@ # Changelog +## [1.3.9] - 2026-03-22 + +### Changed +- Added `Legion::Logging` calls (guarded with `defined?`) to all previously silent rescue blocks +- `memcached.rb`: debug log on `memcached_tls_settings` failure +- `redis.rb`: warn log on `cluster_flush` fallback; debug log on `resolved_redis_address` and `cache_tls_settings` failures +- `settings.rb`: stdlib `warn` on `legion/settings` require failure (Logging not yet available at that point) + ## [1.3.8] - 2026-03-22 ### Changed diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 3b25284..8e92add 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -86,7 +86,8 @@ def memcached_tls_settings return {} unless defined?(Legion::Settings) Legion::Settings[:cache][:tls] || {} - rescue StandardError + rescue StandardError => e + Legion::Logging.debug("Memcached#memcached_tls_settings failed: #{e.message}") if defined?(Legion::Logging) {} end end diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 2581f30..d9485d0 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -161,7 +161,8 @@ def cluster_flush(conn) node.close end true - rescue StandardError + rescue StandardError => e + Legion::Logging.warn("Redis#cluster_flush cluster node flush failed, falling back to single flushdb: #{e.message}") if defined?(Legion::Logging) conn.flushdb == 'OK' end @@ -178,7 +179,8 @@ def resolved_redis_address(server:, servers:, cluster:) return nodes.join(', ') if nodes.any? Legion::Cache::Settings.resolve_servers(driver: 'redis', server: server, servers: Array(servers)).first - rescue StandardError + rescue StandardError => e + Legion::Logging.debug("Redis#resolved_redis_address failed: #{e.message}") if defined?(Legion::Logging) 'unknown' end @@ -206,7 +208,8 @@ def cache_tls_settings return {} unless defined?(Legion::Settings) Legion::Settings[:cache][:tls] || {} - rescue StandardError + rescue StandardError => e + Legion::Logging.debug("Redis#cache_tls_settings failed: #{e.message}") if defined?(Legion::Logging) {} end end diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 75678eb..ebb3e09 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -2,8 +2,8 @@ begin require 'legion/settings' -rescue StandardError - # empty block +rescue StandardError => e + warn "legion-cache: failed to require legion/settings: #{e.message}" end module Legion diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 2b54383..8293290 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.8' + VERSION = '1.3.9' end end From 14aec958e49121bb9e98fde0bc53c331f2410e38 Mon Sep 17 00:00:00 2001 From: Esity Date: Sun, 22 Mar 2026 10:49:17 -0500 Subject: [PATCH 046/108] update gemspec dependency version constraints --- CHANGELOG.md | 5 +++++ legion-cache.gemspec | 4 ++-- lib/legion/cache/version.rb | 2 +- 3 files changed, 8 insertions(+), 3 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index e3e3b80..cd8cfa5 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,10 @@ # Changelog +## [1.3.10] - 2026-03-22 + +### Changed +- Updated gemspec dependency version constraints: legion-logging >= 1.2.8, legion-settings >= 1.3.12 + ## [1.3.9] - 2026-03-22 ### Changed diff --git a/legion-cache.gemspec b/legion-cache.gemspec index aa68c25..8d4dd17 100644 --- a/legion-cache.gemspec +++ b/legion-cache.gemspec @@ -28,7 +28,7 @@ Gem::Specification.new do |spec| spec.add_dependency 'connection_pool', '>= 2.4' spec.add_dependency 'dalli', '>= 3.0' - spec.add_dependency 'legion-logging' - spec.add_dependency 'legion-settings' + spec.add_dependency 'legion-logging', '>= 1.2.8' + spec.add_dependency 'legion-settings', '>= 1.3.12' spec.add_dependency 'redis', '>= 5.0' end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 8293290..10f9494 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.9' + VERSION = '1.3.10' end end From 85867087ea77656af0243aeb575ca352069aed36 Mon Sep 17 00:00:00 2001 From: Esity Date: Sun, 22 Mar 2026 21:29:17 -0500 Subject: [PATCH 047/108] add Legion::Cache::Helper module for injectable cache mixin (v1.3.11) provides namespaced cache_set/get/delete/fetch for shared cache and local_cache_set/get/delete/fetch for per-node local cache. derives namespace from lex_filename or class name. --- CHANGELOG.md | 7 ++++ lib/legion/cache.rb | 1 + lib/legion/cache/helper.rb | 68 ++++++++++++++++++++++++++++++ lib/legion/cache/version.rb | 2 +- spec/legion/cache/helper_spec.rb | 72 ++++++++++++++++++++++++++++++++ spec/spec_helper.rb | 2 + 6 files changed, 151 insertions(+), 1 deletion(-) create mode 100644 lib/legion/cache/helper.rb create mode 100644 spec/legion/cache/helper_spec.rb diff --git a/CHANGELOG.md b/CHANGELOG.md index cd8cfa5..19ba565 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,12 @@ # Changelog +## [1.3.11] - 2026-03-22 + +### Added +- `Legion::Cache::Helper` module: injectable cache mixin for LEX extensions +- Namespaced `cache_set`, `cache_get`, `cache_delete`, `cache_fetch` for shared cache +- Namespaced `local_cache_set`, `local_cache_get`, `local_cache_delete`, `local_cache_fetch` for per-node local cache + ## [1.3.10] - 2026-03-22 ### Changed diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 24edd2b..4f19860 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -7,6 +7,7 @@ require 'legion/cache/memcached' require 'legion/cache/redis' require 'legion/cache/local' +require 'legion/cache/helper' module Legion module Cache diff --git a/lib/legion/cache/helper.rb b/lib/legion/cache/helper.rb new file mode 100644 index 0000000..ac28c18 --- /dev/null +++ b/lib/legion/cache/helper.rb @@ -0,0 +1,68 @@ +# frozen_string_literal: true + +module Legion + module Cache + module Helper + def cache_namespace + @cache_namespace ||= derive_cache_namespace + end + + def cache_set(key, value, ttl: 60) + Legion::Cache.set(cache_namespace + key, value, ttl) + end + + def cache_get(key) + Legion::Cache.get(cache_namespace + key) + end + + def cache_delete(key) + Legion::Cache.delete(cache_namespace + key) + end + + def cache_fetch(key, ttl: 60, &) + Legion::Cache.fetch(cache_namespace + key, ttl, &) + end + + def local_cache_set(key, value, ttl: 60) + Legion::Cache::Local.set(cache_namespace + key, value, ttl) + end + + def local_cache_get(key) + Legion::Cache::Local.get(cache_namespace + key) + end + + def local_cache_delete(key) + Legion::Cache::Local.delete(cache_namespace + key) + end + + def local_cache_fetch(key, ttl: 60, &) + Legion::Cache::Local.fetch(cache_namespace + key, ttl, &) + end + + private + + def derive_cache_namespace + if respond_to?(:lex_filename) + fname = lex_filename + fname.is_a?(Array) ? fname.first : fname + else + derive_cache_namespace_from_class + end + end + + def derive_cache_namespace_from_class + name = respond_to?(:ancestors) ? ancestors.first.to_s : self.class.to_s + parts = name.split('::') + ext_idx = parts.index('Extensions') + target = if ext_idx && parts[ext_idx + 1] + parts[ext_idx + 1] + else + parts.last + end + target.gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2') + .gsub(/([a-z\d])([A-Z])/, '\1_\2') + .downcase + end + end + end +end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 10f9494..09d0e8e 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.10' + VERSION = '1.3.11' end end diff --git a/spec/legion/cache/helper_spec.rb b/spec/legion/cache/helper_spec.rb new file mode 100644 index 0000000..37017fb --- /dev/null +++ b/spec/legion/cache/helper_spec.rb @@ -0,0 +1,72 @@ +# frozen_string_literal: true + +require 'spec_helper' + +RSpec.describe Legion::Cache::Helper do + let(:helper_class) do + Class.new do + include Legion::Cache::Helper + + def lex_filename + 'microsoft_teams' + end + end + end + + let(:bare_class) do + stub_const('Legion::Extensions::MyExtension::Runners::Foo', Class.new do + include Legion::Cache::Helper + end) + end + + subject { helper_class.new } + + describe '#cache_namespace' do + it 'derives from lex_filename' do + expect(subject.cache_namespace).to eq('microsoft_teams') + end + + it 'derives from class name when lex_filename is not defined' do + obj = bare_class.new + expect(obj.cache_namespace).to eq('my_extension') + end + end + + describe '#cache_set / #cache_get' do + it 'delegates to Legion::Cache with namespaced key' do + expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', 120) + subject.cache_set(':messages', 'data', ttl: 120) + end + + it 'delegates get to Legion::Cache with namespaced key' do + expect(Legion::Cache).to receive(:get).with('microsoft_teams:messages').and_return('data') + expect(subject.cache_get(':messages')).to eq('data') + end + end + + describe '#cache_delete' do + it 'delegates to Legion::Cache with namespaced key' do + expect(Legion::Cache).to receive(:delete).with('microsoft_teams:messages') + subject.cache_delete(':messages') + end + end + + describe '#local_cache_set / #local_cache_get' do + it 'delegates to Legion::Cache::Local with namespaced key' do + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', 60) + subject.local_cache_set(':hwm', 'ts') + end + + it 'delegates get to Legion::Cache::Local with namespaced key' do + expect(Legion::Cache::Local).to receive(:get).with('microsoft_teams:hwm').and_return('ts') + expect(subject.local_cache_get(':hwm')).to eq('ts') + end + end + + describe '#local_cache_delete' do + it 'delegates to Legion::Cache::Local with namespaced key' do + expect(Legion::Cache::Local).to receive(:delete).with('microsoft_teams:hwm') + subject.local_cache_delete(':hwm') + end + end +end diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb index 80c2150..27d1874 100644 --- a/spec/spec_helper.rb +++ b/spec/spec_helper.rb @@ -10,6 +10,8 @@ require 'legion/cache/settings' require 'legion/cache/version' +require 'legion/cache/local' +require 'legion/cache/helper' Legion::Settings.merge_settings('cache', Legion::Cache::Settings.default) Legion::Settings.load From e31b155747b09f24e233e9e79e4379cae6d49ec6 Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 24 Mar 2026 09:04:24 -0500 Subject: [PATCH 048/108] feat: add Memory adapter for lite mode - Pure in-memory cache with TTL expiry and thread-safe Mutex - Activated when LEGION_MODE=lite, skips Redis/Memcached entirely - Cache operations delegate through @using_memory flag - 10 new specs covering get/set/fetch/delete/flush/TTL/threading --- CHANGELOG.md | 8 +++ lib/legion/cache.rb | 24 ++++++++- lib/legion/cache/memory.rb | 89 ++++++++++++++++++++++++++++++++ lib/legion/cache/version.rb | 2 +- spec/legion/cache/memory_spec.rb | 86 ++++++++++++++++++++++++++++++ 5 files changed, 206 insertions(+), 3 deletions(-) create mode 100644 lib/legion/cache/memory.rb create mode 100644 spec/legion/cache/memory_spec.rb diff --git a/CHANGELOG.md b/CHANGELOG.md index 19ba565..e4d8ea8 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,13 @@ # Changelog +## [1.3.12] - 2026-03-24 + +### Added +- `Legion::Cache::Memory` adapter module for lite mode: pure in-memory cache with TTL expiry and thread-safe Mutex synchronization +- Cache `setup` auto-detects `LEGION_MODE=lite` and activates Memory adapter, skipping Redis/Memcached +- `@using_memory` flag routes `get`/`set`/`fetch`/`delete`/`flush` through Memory adapter +- `shutdown` cleanly tears down Memory adapter when active + ## [1.3.11] - 2026-03-22 ### Added diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 4f19860..b4a4eea 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -6,6 +6,7 @@ require 'legion/cache/memcached' require 'legion/cache/redis' +require 'legion/cache/memory' require 'legion/cache/local' require 'legion/cache/helper' @@ -21,15 +22,29 @@ class << self def setup(**) return Legion::Settings[:cache][:connected] = true if connected? + if ENV['LEGION_MODE'] == 'lite' + Legion::Cache::Memory.setup + @using_memory = true + @connected = true + Legion::Settings[:cache][:connected] = true + Legion::Logging.info 'Legion::Cache using in-memory adapter (lite mode)' if defined?(Legion::Logging) + return + end + setup_local setup_shared(**) end def shutdown Legion::Logging.info 'Shutting down Legion::Cache' - close unless @using_local - Legion::Cache::Local.shutdown if Legion::Cache::Local.connected? + if @using_memory + Legion::Cache::Memory.shutdown + else + close unless @using_local + Legion::Cache::Local.shutdown if Legion::Cache::Local.connected? + end @using_local = false + @using_memory = false @connected = false Legion::Settings[:cache][:connected] = false end @@ -43,30 +58,35 @@ def using_local? end def get(key) + return Legion::Cache::Memory.get(key) if @using_memory return Legion::Cache::Local.get(key) if @using_local super end def set(key, value, ttl = 180) + return Legion::Cache::Memory.set(key, value, ttl) if @using_memory return Legion::Cache::Local.set(key, value, ttl) if @using_local super end def fetch(key, ttl = nil) + return Legion::Cache::Memory.fetch(key, ttl) if @using_memory return Legion::Cache::Local.fetch(key, ttl) if @using_local super end def delete(key) + return Legion::Cache::Memory.delete(key) if @using_memory return Legion::Cache::Local.delete(key) if @using_local super end def flush(delay = 0) + return Legion::Cache::Memory.flush(delay) if @using_memory return Legion::Cache::Local.flush(delay) if @using_local super diff --git a/lib/legion/cache/memory.rb b/lib/legion/cache/memory.rb new file mode 100644 index 0000000..3c48f75 --- /dev/null +++ b/lib/legion/cache/memory.rb @@ -0,0 +1,89 @@ +# frozen_string_literal: true + +module Legion + module Cache + module Memory + extend self + + @store = {} + @expiry = {} + @mutex = Mutex.new + @connected = false + + def setup(**) + @connected = true + end + + def client(**) = self + + def connected? + @connected + end + + def get(key) + @mutex.synchronize do + expire_if_needed(key) + @store[key] + end + end + + def set(key, value, ttl = nil) + @mutex.synchronize do + @store[key] = value + @expiry[key] = Time.now + ttl if ttl&.positive? + value + end + end + + def fetch(key, ttl = nil) + val = get(key) + return val unless val.nil? + + val = yield if block_given? + set(key, val, ttl) + val + end + + def delete(key) + @mutex.synchronize do + @store.delete(key) + @expiry.delete(key) + end + end + + def flush(_delay = 0) + @mutex.synchronize do + @store.clear + @expiry.clear + end + end + + def close = nil + + def shutdown + flush + @connected = false + end + + def reset! + @mutex.synchronize do + @store.clear + @expiry.clear + @connected = false + end + end + + def size = 1 + def available = 1 + + private + + def expire_if_needed(key) + return unless @expiry.key?(key) && Time.now > @expiry[key] + + @store.delete(key) + @expiry.delete(key) + end + end + end +end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 09d0e8e..e5a77ed 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.11' + VERSION = '1.3.12' end end diff --git a/spec/legion/cache/memory_spec.rb b/spec/legion/cache/memory_spec.rb new file mode 100644 index 0000000..090d3b8 --- /dev/null +++ b/spec/legion/cache/memory_spec.rb @@ -0,0 +1,86 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/memory' + +RSpec.describe Legion::Cache::Memory do + before { described_class.reset! } + + describe '.get / .set' do + it 'stores and retrieves a value' do + described_class.set('key1', 'value1') + expect(described_class.get('key1')).to eq('value1') + end + + it 'returns nil for missing key' do + expect(described_class.get('missing')).to be_nil + end + + it 'expires values after TTL' do + described_class.set('expire-me', 'data', 0.1) + sleep 0.15 + expect(described_class.get('expire-me')).to be_nil + end + end + + describe '.delete' do + it 'removes a key' do + described_class.set('del-key', 'val') + described_class.delete('del-key') + expect(described_class.get('del-key')).to be_nil + end + end + + describe '.fetch' do + it 'returns existing value' do + described_class.set('f-key', 'existing') + result = described_class.fetch('f-key') { 'fallback' } # rubocop:disable Style/RedundantFetchBlock + expect(result).to eq('existing') + end + + it 'stores and returns block value on miss' do + result = described_class.fetch('f-miss') { 'computed' } # rubocop:disable Style/RedundantFetchBlock + expect(result).to eq('computed') + expect(described_class.get('f-miss')).to eq('computed') + end + end + + describe '.flush' do + it 'clears all entries' do + described_class.set('a', 1) + described_class.set('b', 2) + described_class.flush + expect(described_class.get('a')).to be_nil + expect(described_class.get('b')).to be_nil + end + end + + describe '.connected?' do + it 'returns true after setup' do + described_class.setup + expect(described_class.connected?).to be true + end + end + + describe '.shutdown' do + it 'marks as disconnected' do + described_class.setup + described_class.shutdown + expect(described_class.connected?).to be false + end + end + + describe 'thread safety' do + it 'handles concurrent reads and writes' do + described_class.setup + threads = 20.times.map do |i| + Thread.new do + described_class.set("k#{i}", i) + described_class.get("k#{i}") + end + end + threads.each(&:join) + expect(described_class.get('k0')).to eq(0) + end + end +end From f08e02ba7ee12a8bfd133a9781e2ee1cd248fd38 Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 24 Mar 2026 11:06:06 -0500 Subject: [PATCH 049/108] reindex docs: update to v1.3.12, add Memory adapter and Helper mixin docs --- CLAUDE.md | 14 ++++++++++---- README.md | 16 +++++++++++++++- 2 files changed, 25 insertions(+), 5 deletions(-) diff --git a/CLAUDE.md b/CLAUDE.md index 38163df..cf67fc5 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -8,14 +8,14 @@ Caching wrapper for the LegionIO framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. **GitHub**: https://github.com/LegionIO/legion-cache -**Version**: 1.3.0 +**Version**: 1.3.12 **License**: Apache-2.0 ## Architecture ``` Legion::Cache (singleton module) -├── .setup(**opts) # Connect to cache backend +├── .setup(**opts) # Connect to cache backend (auto-detects LEGION_MODE=lite -> Memory adapter) ├── .get(key) # Retrieve cached value ├── .fetch(key, ttl) # Get with block/TTL support (Memcached only; alias for get on Redis) ├── .set(key, value, ttl) # Store value with optional TTL (positional on Memcached, keyword on Redis) @@ -25,9 +25,10 @@ Legion::Cache (singleton module) ├── .size # Total pool connections ├── .available # Idle pool connections ├── .restart(**opts) # Close and reconnect pool with optional new opts -├── .shutdown # Close connections, mark disconnected +├── .shutdown # Close connections, mark disconnected (handles Memory adapter) ├── .local # Accessor for Legion::Cache::Local ├── .using_local? # Whether fallback to local is active +├── .using_memory? # Whether Memory adapter (lite mode) is active │ ├── Memcached # Dalli-based Memcached driver (default) │ └── Uses connection_pool for thread safety @@ -35,6 +36,9 @@ Legion::Cache (singleton module) ├── Redis # Redis driver │ └── Uses connection_pool for thread safety │ └── Default pool_size is 20 (Memcached default is 10) +├── Memory # Lite mode adapter: pure in-memory cache, TTL expiry, Mutex thread-safety +│ └── Activated by LEGION_MODE=lite env var; no Redis/Memcached required +├── Helper # Injectable cache mixin for LEX extensions (namespaced cache_*/local_cache_*) ├── Local # Local cache tier (localhost Redis/Memcached, fallback target) │ ├── .setup # Connect to local cache server (auto-detect driver) │ ├── .shutdown # Close local connection @@ -124,9 +128,11 @@ Dalli enforces a 1MB client-side limit by default (`value_max_bytes: 1_048_576`) | Path | Purpose | |------|---------| -| `lib/legion/cache.rb` | Module entry, driver selection, setup/shutdown, fallback wiring | +| `lib/legion/cache.rb` | Module entry, driver selection, setup/shutdown, fallback wiring, Memory adapter activation | | `lib/legion/cache/memcached.rb` | Dalli/Memcached driver implementation | | `lib/legion/cache/redis.rb` | Redis driver implementation | +| `lib/legion/cache/memory.rb` | Lite mode Memory adapter: in-memory store with TTL + Mutex thread-safety | +| `lib/legion/cache/helper.rb` | Injectable cache mixin for LEX extensions | | `lib/legion/cache/local.rb` | Local cache tier (localhost, fallback target) | | `lib/legion/cache/pool.rb` | Connection pool management | | `lib/legion/cache/settings.rb` | Default configuration + local defaults | diff --git a/README.md b/README.md index d85ef1d..68ca422 100644 --- a/README.md +++ b/README.md @@ -2,7 +2,7 @@ Caching wrapper for the [LegionIO](https://github.com/LegionIO/LegionIO) framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. -**Version**: 1.3.2 +**Version**: 1.3.12 ## Installation @@ -40,6 +40,20 @@ Legion::Cache.flush # flushdb Legion::Cache.shutdown ``` +## Lite Mode (No Infrastructure) + +When `LEGION_MODE=lite` is set, `Legion::Cache` activates the pure in-memory `Memory` adapter, bypassing Redis and Memcached entirely: + +```ruby +ENV['LEGION_MODE'] = 'lite' +Legion::Cache.setup +Legion::Cache.using_memory? # => true +Legion::Cache.set('key', 'value', 60) +Legion::Cache.get('key') # => 'value' +``` + +The Memory adapter is thread-safe (Mutex), supports TTL expiry, and exposes the same `get`/`set`/`fetch`/`delete`/`flush` interface. Shutdown cleanly tears it down. + ## Two-Tier Cache Legion::Cache supports a two-tier architecture: a shared remote cluster and a local per-machine cache. If the shared cluster is unreachable at setup, all operations transparently fall back to local. From ec843bdefb764585d9a21c8b9666ec80a4135976 Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 24 Mar 2026 11:10:02 -0500 Subject: [PATCH 050/108] bump version to 1.3.13 for release --- CHANGELOG.md | 5 +++++ lib/legion/cache/version.rb | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index e4d8ea8..c2bc3f8 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,10 @@ # Changelog +## [1.3.13] - 2026-03-24 + +### Changed +- Reindex docs: update CLAUDE.md and README with Memory adapter and Helper mixin docs + ## [1.3.12] - 2026-03-24 ### Added diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index e5a77ed..8cb0df6 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.12' + VERSION = '1.3.13' end end From cd5c841b204afb9a3d65b41d012147b8ce26be56 Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 24 Mar 2026 14:40:50 -0500 Subject: [PATCH 051/108] add username, password, db, reconnect_attempts to Redis client options --- CHANGELOG.md | 6 +++ lib/legion/cache/redis.rb | 19 +++++-- lib/legion/cache/settings.rb | 66 ++++++++++++++----------- lib/legion/cache/version.rb | 2 +- spec/legion/cache/redis_cluster_spec.rb | 16 +++--- spec/legion/redis_spec.rb | 6 +-- 6 files changed, 69 insertions(+), 46 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index c2bc3f8..951d16f 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,11 @@ # Changelog +## [1.3.14] - 2026-03-24 + +### Added +- `username`, `password`, `db`, and `reconnect_attempts` options to Redis `client` and `build_redis_client` +- Corresponding nil/default entries in `Settings.default` and `Settings.local` + ## [1.3.13] - 2026-03-24 ### Changed diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index d9485d0..bb478d0 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -11,7 +11,8 @@ module Redis include Legion::Cache::Pool extend self - def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, replica: false, fixed_hostname: nil, **) # rubocop:disable Metrics/ParameterLists + def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, replica: false, # rubocop:disable Metrics/ParameterLists + fixed_hostname: nil, username: nil, password: nil, db: nil, reconnect_attempts: 1, **) return @client unless @client.nil? @pool_size = pool_size @@ -20,26 +21,34 @@ def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, re @client = ConnectionPool.new(size: pool_size, timeout: timeout) do build_redis_client(server: server, servers: servers, cluster: cluster, - replica: replica, fixed_hostname: fixed_hostname) + replica: replica, fixed_hostname: fixed_hostname, + username: username, password: password, db: db, + reconnect_attempts: reconnect_attempts) end @connected = true Legion::Logging.info "Redis connected to #{resolved_redis_address(server: server, servers: servers, cluster: cluster)}" if defined?(Legion::Logging) @client end - def build_redis_client(server: nil, servers: [], cluster: nil, replica: false, fixed_hostname: nil) + def build_redis_client(server: nil, servers: [], cluster: nil, replica: false, fixed_hostname: nil, # rubocop:disable Metrics/ParameterLists + username: nil, password: nil, db: nil, reconnect_attempts: 1) nodes = Array(cluster).compact if nodes.any? - opts = { cluster: nodes } + opts = { cluster: nodes, reconnect_attempts: reconnect_attempts } opts[:replica] = true if replica opts[:fixed_hostname] = fixed_hostname unless fixed_hostname.nil? + opts[:username] = username unless username.nil? + opts[:password] = password unless password.nil? ::Redis.new(**opts) else resolved = Legion::Cache::Settings.resolve_servers( driver: 'redis', server: server, servers: servers ) host, port = resolved.first.split(':') - redis_opts = { host: host, port: port.to_i } + redis_opts = { host: host, port: port.to_i, reconnect_attempts: reconnect_attempts } + redis_opts[:username] = username unless username.nil? + redis_opts[:password] = password unless password.nil? + redis_opts[:db] = db unless db.nil? redis_opts.merge!(redis_tls_options(port: port.to_i)) ::Redis.new(**redis_opts) end diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index ebb3e09..978ede4 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -13,40 +13,48 @@ module Settings Legion::Settings.merge_settings(:cache_local, local) if Legion::Settings.method_defined? :merge_settings def self.default { - driver: driver, - servers: resolve_servers(driver: driver), - connected: false, - enabled: true, - namespace: 'legion', - compress: false, - failover: true, - threadsafe: true, - expires_in: 0, - cache_nils: false, - pool_size: 10, - timeout: 5, - serializer: Legion::JSON, - cluster: nil, - replica: false, - fixed_hostname: nil + driver: driver, + servers: resolve_servers(driver: driver), + connected: false, + enabled: true, + namespace: 'legion', + compress: false, + failover: true, + threadsafe: true, + expires_in: 0, + cache_nils: false, + pool_size: 10, + timeout: 5, + serializer: Legion::JSON, + cluster: nil, + replica: false, + fixed_hostname: nil, + username: nil, + password: nil, + db: nil, + reconnect_attempts: 1 } end def self.local { - driver: driver, - servers: resolve_servers(driver: driver), - connected: false, - enabled: true, - namespace: 'legion_local', - compress: false, - failover: true, - threadsafe: true, - expires_in: 0, - cache_nils: false, - pool_size: 5, - timeout: 3, - serializer: Legion::JSON + driver: driver, + servers: resolve_servers(driver: driver), + connected: false, + enabled: true, + namespace: 'legion_local', + compress: false, + failover: true, + threadsafe: true, + expires_in: 0, + cache_nils: false, + pool_size: 5, + timeout: 3, + serializer: Legion::JSON, + username: nil, + password: nil, + db: nil, + reconnect_attempts: 1 } end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 8cb0df6..8cf2375 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.13' + VERSION = '1.3.14' end end diff --git a/spec/legion/cache/redis_cluster_spec.rb b/spec/legion/cache/redis_cluster_spec.rb index b2b65f8..a7754aa 100644 --- a/spec/legion/cache/redis_cluster_spec.rb +++ b/spec/legion/cache/redis_cluster_spec.rb @@ -21,56 +21,56 @@ describe '#build_redis_client cluster options' do it 'passes cluster nodes to Redis.new' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(cluster: cluster_nodes).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(cluster: cluster_nodes)).and_return(redis_instance) result = described_class.build_redis_client(cluster: cluster_nodes) expect(result).to eq redis_instance end it 'passes replica: true when replica is enabled' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(cluster: cluster_nodes, replica: true).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(cluster: cluster_nodes, replica: true)).and_return(redis_instance) result = described_class.build_redis_client(cluster: cluster_nodes, replica: true) expect(result).to eq redis_instance end it 'passes fixed_hostname when provided' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(cluster: cluster_nodes, fixed_hostname: 'redis.internal').and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(cluster: cluster_nodes, fixed_hostname: 'redis.internal')).and_return(redis_instance) result = described_class.build_redis_client(cluster: cluster_nodes, fixed_hostname: 'redis.internal') expect(result).to eq redis_instance end it 'passes all cluster options together' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(cluster: cluster_nodes, replica: true, fixed_hostname: 'redis.internal').and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(cluster: cluster_nodes, replica: true, fixed_hostname: 'redis.internal')).and_return(redis_instance) result = described_class.build_redis_client(cluster: cluster_nodes, replica: true, fixed_hostname: 'redis.internal') expect(result).to eq redis_instance end it 'omits replica when false' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(cluster: cluster_nodes).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(cluster: cluster_nodes)).and_return(redis_instance) result = described_class.build_redis_client(cluster: cluster_nodes, replica: false) expect(result).to eq redis_instance end it 'omits fixed_hostname when nil' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(cluster: cluster_nodes).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(cluster: cluster_nodes)).and_return(redis_instance) result = described_class.build_redis_client(cluster: cluster_nodes, fixed_hostname: nil) expect(result).to eq redis_instance end it 'falls back to single-node when cluster is empty' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(host: '127.0.0.1', port: 6379)).and_return(redis_instance) result = described_class.build_redis_client(cluster: []) expect(result).to eq redis_instance end it 'falls back to single-node when cluster contains only nils' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(host: '127.0.0.1', port: 6379)).and_return(redis_instance) result = described_class.build_redis_client(cluster: [nil, nil]) expect(result).to eq redis_instance end diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index 5a51f11..50ec7b0 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -73,7 +73,7 @@ it 'returns a single-node Redis client when no cluster is given' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(host: '127.0.0.1', port: 6379)).and_return(redis_instance) result = @cache.build_redis_client expect(result).to eq redis_instance end @@ -88,14 +88,14 @@ it 'falls back to single-node when cluster is an empty array' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(host: '127.0.0.1', port: 6379)).and_return(redis_instance) result = @cache.build_redis_client(cluster: []) expect(result).to eq redis_instance end it 'falls back to single-node when cluster is nil' do redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).with(host: '127.0.0.1', port: 6379).and_return(redis_instance) + allow(Redis).to receive(:new).with(hash_including(host: '127.0.0.1', port: 6379)).and_return(redis_instance) result = @cache.build_redis_client(cluster: nil) expect(result).to eq redis_instance end From 5883d9a1270f59f284ef45661c80cf4e6b6c18bf Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 24 Mar 2026 18:42:05 -0500 Subject: [PATCH 052/108] add PHI-aware cache TTL policy (phi_max_ttl enforcement) --- lib/legion/cache.rb | 24 +++++++++-- spec/legion/cache/phi_policy_spec.rb | 64 ++++++++++++++++++++++++++++ 2 files changed, 84 insertions(+), 4 deletions(-) create mode 100644 spec/legion/cache/phi_policy_spec.rb diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index b4a4eea..7e776bb 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -64,11 +64,27 @@ def get(key) super end - def set(key, value, ttl = 180) - return Legion::Cache::Memory.set(key, value, ttl) if @using_memory - return Legion::Cache::Local.set(key, value, ttl) if @using_local + def phi_max_ttl + return 3600 unless defined?(Legion::Settings) - super + Legion::Settings.dig(:cache, :compliance, :phi_max_ttl) || 3600 + rescue StandardError + 3600 + end + + def enforce_phi_ttl(ttl, phi: false, **) + return ttl unless phi == true + + max = phi_max_ttl + [ttl, max].min + end + + def set(key, value, ttl = 180, **) + effective_ttl = enforce_phi_ttl(ttl, **) + return Legion::Cache::Memory.set(key, value, effective_ttl) if @using_memory + return Legion::Cache::Local.set(key, value, effective_ttl) if @using_local + + super(key, value, effective_ttl) end def fetch(key, ttl = nil) diff --git a/spec/legion/cache/phi_policy_spec.rb b/spec/legion/cache/phi_policy_spec.rb new file mode 100644 index 0000000..c40a99e --- /dev/null +++ b/spec/legion/cache/phi_policy_spec.rb @@ -0,0 +1,64 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'Legion::Cache PHI TTL policy' do + before do + allow(Legion::Settings).to receive(:dig).with(:cache, :compliance, :phi_max_ttl).and_return(3600) + end + + describe 'Legion::Cache.phi_max_ttl' do + it 'returns the configured phi_max_ttl' do + expect(Legion::Cache.phi_max_ttl).to eq(3600) + end + end + + describe 'Legion::Cache.enforce_phi_ttl' do + it 'caps ttl at phi_max_ttl when phi: true' do + result = Legion::Cache.enforce_phi_ttl(7200, phi: true) + expect(result).to eq(3600) + end + + it 'returns original ttl when phi is false' do + result = Legion::Cache.enforce_phi_ttl(7200, phi: false) + expect(result).to eq(7200) + end + + it 'returns original ttl when phi key is absent' do + result = Legion::Cache.enforce_phi_ttl(7200) + expect(result).to eq(7200) + end + + it 'caps even if ttl is below phi_max_ttl -- passes through lower value' do + result = Legion::Cache.enforce_phi_ttl(60, phi: true) + expect(result).to eq(60) + end + + it 'caps at phi_max_ttl when ttl exceeds it and phi: true' do + result = Legion::Cache.enforce_phi_ttl(86_400, phi: true) + expect(result).to eq(3600) + end + end + + describe 'Legion::Cache.set with phi: true option' do + before do + allow(Legion::Cache::Memory).to receive(:set) + Legion::Cache.instance_variable_set(:@using_memory, true) + end + + after do + Legion::Cache.instance_variable_set(:@using_memory, false) + end + + it 'enforces phi max ttl before delegating to memory adapter' do + Legion::Cache.set('phi:task:99', 'value', 7200, phi: true) + expect(Legion::Cache::Memory).to have_received(:set).with('phi:task:99', 'value', 3600) + end + + it 'passes original ttl when phi is not set' do + Legion::Cache.set('task:99', 'value', 7200) + expect(Legion::Cache::Memory).to have_received(:set).with('task:99', 'value', 7200) + end + end +end From 1b8bf01e8db09e67bb4ba425777ae1ba35738fd5 Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 24 Mar 2026 21:21:35 -0500 Subject: [PATCH 053/108] bump version to 1.3.15, update CHANGELOG for PHI cache TTL policy --- CHANGELOG.md | 7 +++++++ lib/legion/cache/version.rb | 2 +- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 951d16f..6ec4781 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,12 @@ # Changelog +## [1.3.15] - 2026-03-24 + +### Added +- PHI-aware TTL enforcement: `Cache.set` accepts `phi: true` keyword option; TTL is capped at `cache.compliance.phi_max_ttl` (default 3600s) when set +- `Legion::Cache.phi_max_ttl` — reads `cache.compliance.phi_max_ttl` from settings with 3600s default +- `Legion::Cache.enforce_phi_ttl(ttl, phi:)` — public helper for PHI TTL cap logic + ## [1.3.14] - 2026-03-24 ### Added diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 8cf2375..e68cb49 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.14' + VERSION = '1.3.15' end end From 982bc36a31e8514005ad943677a8d7da8602bfc3 Mon Sep 17 00:00:00 2001 From: Esity Date: Wed, 25 Mar 2026 00:39:40 -0500 Subject: [PATCH 054/108] fix cache set ttl argument handling --- .github/workflows/ci.yml | 25 ++++++++++++++++++++----- CHANGELOG.md | 6 ++++++ CLAUDE.md | 2 +- README.md | 4 ++-- lib/legion/cache.rb | 5 +++-- lib/legion/cache/redis.rb | 2 +- lib/legion/cache/version.rb | 2 +- 7 files changed, 34 insertions(+), 12 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 9a0abe1..a83e3a5 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -3,17 +3,32 @@ on: push: branches: [main] pull_request: + schedule: + - cron: '0 9 * * 1' jobs: ci: uses: LegionIO/.github/.github/workflows/ci.yml@main - with: - needs-redis: true - needs-memcached: true + + lint: + uses: LegionIO/.github/.github/workflows/lint-patterns.yml@main + + security: + uses: LegionIO/.github/.github/workflows/security-scan.yml@main + + version-changelog: + uses: LegionIO/.github/.github/workflows/version-changelog.yml@main + + dependency-review: + uses: LegionIO/.github/.github/workflows/dependency-review.yml@main + + stale: + if: github.event_name == 'schedule' + uses: LegionIO/.github/.github/workflows/stale.yml@main release: - needs: ci + needs: [ci, lint] if: github.event_name == 'push' && github.ref == 'refs/heads/main' uses: LegionIO/.github/.github/workflows/release.yml@main secrets: - rubygems-api-key: ${{ secrets.RUBYGEMS_API_KEY }} + rubygems-api-key: ${{ secrets.RUBYGEMS_API_KEY }} \ No newline at end of file diff --git a/CHANGELOG.md b/CHANGELOG.md index 6ec4781..8ccd49a 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,11 @@ # Changelog +## [Unreleased] + +### Fixed +- Accept ttl as positional or keyword argument in Cache.set for caller flexibility +- Align Redis.set signature to positional ttl arg matching parent module convention + ## [1.3.15] - 2026-03-24 ### Added diff --git a/CLAUDE.md b/CLAUDE.md index cf67fc5..de74d7f 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -56,7 +56,7 @@ Legion::Cache (singleton module) - **Driver Selection at Load Time**: `Legion::Settings[:cache][:driver]` determines which module gets `extend`ed into `Legion::Cache` (`'redis'` or `'dalli'`) - **Connection Pooling**: Both drivers use `connection_pool` gem for thread-safe access - **Unified Interface**: Same `get`/`set`/`delete`/`flush`/`connected?`/`shutdown` methods regardless of backend -- **TTL Signature Difference**: Memcached `set(key, value, ttl)` uses a positional TTL (default 180s); Redis `set(key, value, ttl: nil)` uses a keyword TTL +- **Uniform TTL Signature**: All backends use `set(key, value, ttl)` with a positional TTL argument (Memcached default 180s, Redis/Memory/Local default nil) ### Two-Tier Cache Architecture diff --git a/README.md b/README.md index 68ca422..50618e6 100644 --- a/README.md +++ b/README.md @@ -31,8 +31,8 @@ Legion::Cache.fetch('foobar') # => 'testing' (get with block support) Legion::Cache.delete('foobar') # => true Legion::Cache.flush # flush all keys -# Redis driver — TTL is a keyword argument -Legion::Cache.set('foobar', 'testing', ttl: 10) +# Redis driver — TTL is the third positional argument +Legion::Cache.set('foobar', 'testing', 10) Legion::Cache.get('foobar') # => 'testing' Legion::Cache.delete('foobar') # => true Legion::Cache.flush # flushdb diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 7e776bb..b4909e9 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -79,8 +79,9 @@ def enforce_phi_ttl(ttl, phi: false, **) [ttl, max].min end - def set(key, value, ttl = 180, **) - effective_ttl = enforce_phi_ttl(ttl, **) + def set(key, value, ttl = nil, **opts) + ttl = opts.delete(:ttl) || ttl || 180 + effective_ttl = enforce_phi_ttl(ttl, **opts) return Legion::Cache::Memory.set(key, value, effective_ttl) if @using_memory return Legion::Cache::Local.set(key, value, effective_ttl) if @using_local diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index bb478d0..918588a 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -68,7 +68,7 @@ def get(key) end alias fetch get - def set(key, value, ttl: nil) + def set(key, value, ttl = nil) args = {} args[:ex] = ttl unless ttl.nil? result = client.with { |conn| conn.set(key, value, **args) == 'OK' } diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index e68cb49..ce8061b 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.15' + VERSION = '1.3.16' end end From cf628d00539ce73460e9eb058a31e9bb6e2f5755 Mon Sep 17 00:00:00 2001 From: Esity Date: Wed, 25 Mar 2026 00:42:39 -0500 Subject: [PATCH 055/108] restore needs-redis and needs-memcached in ci workflow --- .github/workflows/ci.yml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index a83e3a5..5ed4d2f 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -9,6 +9,9 @@ on: jobs: ci: uses: LegionIO/.github/.github/workflows/ci.yml@main + with: + needs-redis: true + needs-memcached: true lint: uses: LegionIO/.github/.github/workflows/lint-patterns.yml@main From 30752c2eae9154a3a1c930368dfd475f0b572ed6 Mon Sep 17 00:00:00 2001 From: Esity Date: Wed, 25 Mar 2026 02:41:25 -0500 Subject: [PATCH 056/108] add repo governance files (CODEOWNERS, dependabot, CI) --- .github/CODEOWNERS | 7 +++++++ .github/dependabot.yml | 18 ++++++++++++++++++ 2 files changed, 25 insertions(+) create mode 100644 .github/CODEOWNERS create mode 100644 .github/dependabot.yml diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS new file mode 100644 index 0000000..72f03d6 --- /dev/null +++ b/.github/CODEOWNERS @@ -0,0 +1,7 @@ +# Auto-generated from team-config.yml +# Team: core +# +# To apply: scripts/apply-codeowners.sh legion-cache + +* @LegionIO/maintainers +* @LegionIO/core diff --git a/.github/dependabot.yml b/.github/dependabot.yml new file mode 100644 index 0000000..79ea87c --- /dev/null +++ b/.github/dependabot.yml @@ -0,0 +1,18 @@ +version: 2 +updates: + - package-ecosystem: bundler + directory: / + schedule: + interval: weekly + day: monday + open-pull-requests-limit: 5 + labels: + - "type:dependencies" + - package-ecosystem: github-actions + directory: / + schedule: + interval: weekly + day: monday + open-pull-requests-limit: 5 + labels: + - "type:dependencies" From a751f5fcb5d62a22b3aa87aef982b871332e0073 Mon Sep 17 00:00:00 2001 From: Esity Date: Wed, 25 Mar 2026 15:50:16 -0500 Subject: [PATCH 057/108] add redis hash and sorted set operations for hot tier support (v1.3.17) - add Legion::Cache::RedisHash module (hset, hgetall, hdel, zadd, zrangebyscore, zrem, expire) - safe no-ops when redis unavailable --- CHANGELOG.md | 8 ++ lib/legion/cache.rb | 1 + lib/legion/cache/redis_hash.rb | 118 ++++++++++++++++ lib/legion/cache/version.rb | 2 +- spec/legion/cache/redis_hash_spec.rb | 198 +++++++++++++++++++++++++++ 5 files changed, 326 insertions(+), 1 deletion(-) create mode 100644 lib/legion/cache/redis_hash.rb create mode 100644 spec/legion/cache/redis_hash_spec.rb diff --git a/CHANGELOG.md b/CHANGELOG.md index 8ccd49a..aebc828 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,14 @@ ## [Unreleased] +## [1.3.17] - 2026-03-25 + +### Added +- `Legion::Cache::RedisHash` module: Redis hash and sorted-set operations (`hset`, `hgetall`, `hdel`, `zadd`, `zrangebyscore`, `zrem`, `expire`) with `redis_available?` guard and safe defaults when Redis is not connected +- Auto-required from `legion/cache.rb` alongside the existing Redis adapter + +## [1.3.16] - 2026-03-25 + ### Fixed - Accept ttl as positional or keyword argument in Cache.set for caller flexibility - Align Redis.set signature to positional ttl arg matching parent module convention diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index b4909e9..5479e74 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -6,6 +6,7 @@ require 'legion/cache/memcached' require 'legion/cache/redis' +require 'legion/cache/redis_hash' require 'legion/cache/memory' require 'legion/cache/local' require 'legion/cache/helper' diff --git a/lib/legion/cache/redis_hash.rb b/lib/legion/cache/redis_hash.rb new file mode 100644 index 0000000..5941360 --- /dev/null +++ b/lib/legion/cache/redis_hash.rb @@ -0,0 +1,118 @@ +# frozen_string_literal: true + +module Legion + module Cache + module RedisHash + module_function + + # Returns true when the Redis driver is loaded and the connection pool is live. + def redis_available? + pool = Legion::Cache.instance_variable_get(:@client) + return false if pool.nil? + + Legion::Cache.connected? + rescue StandardError + false + end + + # Set hash fields from a Ruby Hash. + # Uses Redis HSET key field value [field value ...] + def hset(key, hash) + return false unless redis_available? + + Legion::Cache.instance_variable_get(:@client).with do |conn| + flat = hash.flat_map { |k, v| [k.to_s, v.to_s] } + conn.hset(key, *flat) + end + true + rescue StandardError => e + log_redis_error('hset', e) + false + end + + # Returns a Ruby Hash (string keys) of all field-value pairs for the key. + def hgetall(key) + return nil unless redis_available? + + Legion::Cache.instance_variable_get(:@client).with do |conn| + conn.hgetall(key) + end + rescue StandardError => e + log_redis_error('hgetall', e) + nil + end + + # Delete one or more hash fields. + def hdel(key, *fields) + return 0 unless redis_available? + + Legion::Cache.instance_variable_get(:@client).with do |conn| + conn.hdel(key, *fields) + end + rescue StandardError => e + log_redis_error('hdel', e) + 0 + end + + # Add a member to a sorted set with the given score. + def zadd(key, score, member) + return false unless redis_available? + + Legion::Cache.instance_variable_get(:@client).with do |conn| + conn.zadd(key, score.to_f, member.to_s) + end + true + rescue StandardError => e + log_redis_error('zadd', e) + false + end + + # Range query on a sorted set by score. Returns an array of members. + # limit: accepts [offset, count] array matching Redis LIMIT semantics. + def zrangebyscore(key, min, max, limit: nil) + return [] unless redis_available? + + opts = {} + opts[:limit] = limit if limit + + Legion::Cache.instance_variable_get(:@client).with do |conn| + conn.zrangebyscore(key, min, max, **opts) + end + rescue StandardError => e + log_redis_error('zrangebyscore', e) + [] + end + + # Remove a member from a sorted set. + def zrem(key, member) + return false unless redis_available? + + Legion::Cache.instance_variable_get(:@client).with do |conn| + conn.zrem(key, member.to_s) + end + true + rescue StandardError => e + log_redis_error('zrem', e) + false + end + + # Set a TTL (in seconds) on a key. + def expire(key, seconds) + return false unless redis_available? + + Legion::Cache.instance_variable_get(:@client).with do |conn| + conn.expire(key, seconds.to_i) == 1 + end + rescue StandardError => e + log_redis_error('expire', e) + false + end + + def log_redis_error(method, error) + return unless defined?(Legion::Logging) + + Legion::Logging.warn "[cache:redis_hash] #{method} failed: #{error.class} — #{error.message}" + end + end + end +end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index ce8061b..1176c57 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.16' + VERSION = '1.3.17' end end diff --git a/spec/legion/cache/redis_hash_spec.rb b/spec/legion/cache/redis_hash_spec.rb new file mode 100644 index 0000000..a751805 --- /dev/null +++ b/spec/legion/cache/redis_hash_spec.rb @@ -0,0 +1,198 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/redis_hash' + +RSpec.describe Legion::Cache::RedisHash do + subject(:mod) { Legion::Cache::RedisHash } + + describe '.redis_available?' do + context 'when the cache pool is nil' do + before { allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(nil) } + + it 'returns false' do + expect(mod.redis_available?).to be false + end + end + + context 'when the cache is not connected' do + before do + pool = double('ConnectionPool') + allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(Legion::Cache).to receive(:connected?).and_return(false) + end + + it 'returns false' do + expect(mod.redis_available?).to be false + end + end + + context 'when the cache is connected' do + before do + pool = double('ConnectionPool') + allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(Legion::Cache).to receive(:connected?).and_return(true) + end + + it 'returns true' do + expect(mod.redis_available?).to be true + end + end + + context 'when an exception is raised' do + before { allow(Legion::Cache).to receive(:instance_variable_get).and_raise(RuntimeError, 'boom') } + + it 'returns false' do + expect(mod.redis_available?).to be false + end + end + end + + describe 'safe defaults when Redis is unavailable' do + before { allow(mod).to receive(:redis_available?).and_return(false) } + + it '#hset returns false' do + expect(mod.hset('key', { 'a' => '1' })).to be false + end + + it '#hgetall returns nil' do + expect(mod.hgetall('key')).to be_nil + end + + it '#hdel returns 0' do + expect(mod.hdel('key', 'field')).to eq 0 + end + + it '#zadd returns false' do + expect(mod.zadd('key', 1.0, 'member')).to be false + end + + it '#zrangebyscore returns empty array' do + expect(mod.zrangebyscore('key', 0, 100)).to eq [] + end + + it '#zrem returns false' do + expect(mod.zrem('key', 'member')).to be false + end + + it '#expire returns false' do + expect(mod.expire('key', 3600)).to be false + end + end + + describe 'Redis command delegation' do + let(:conn) { double('Redis connection') } + let(:pool) { double('ConnectionPool') } + + before do + allow(mod).to receive(:redis_available?).and_return(true) + allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(pool).to receive(:with).and_yield(conn) + end + + describe '#hset' do + it 'calls conn.hset with flattened key-value pairs and returns true' do + allow(conn).to receive(:hset).with('mykey', 'field1', 'val1', 'field2', 'val2').and_return(2) + expect(mod.hset('mykey', { 'field1' => 'val1', 'field2' => 'val2' })).to be true + end + end + + describe '#hgetall' do + it 'returns the hash from conn.hgetall' do + allow(conn).to receive(:hgetall).with('mykey').and_return({ 'f' => 'v' }) + expect(mod.hgetall('mykey')).to eq({ 'f' => 'v' }) + end + + it 'returns nil when conn.hgetall returns empty hash' do + allow(conn).to receive(:hgetall).with('mykey').and_return({}) + expect(mod.hgetall('mykey')).to eq({}) + end + end + + describe '#hdel' do + it 'calls conn.hdel with fields and returns the result' do + allow(conn).to receive(:hdel).with('mykey', 'field1').and_return(1) + expect(mod.hdel('mykey', 'field1')).to eq 1 + end + end + + describe '#zadd' do + it 'calls conn.zadd with stringified member and returns true' do + allow(conn).to receive(:zadd).with('zkey', 1.5, 'member1').and_return(1) + expect(mod.zadd('zkey', 1.5, 'member1')).to be true + end + end + + describe '#zrangebyscore' do + it 'calls conn.zrangebyscore and returns the array' do + allow(conn).to receive(:zrangebyscore).with('zkey', 0, 100).and_return(%w[a b]) + expect(mod.zrangebyscore('zkey', 0, 100)).to eq %w[a b] + end + + it 'passes limit option when provided' do + allow(conn).to receive(:zrangebyscore).with('zkey', 0, 100, limit: [0, 10]).and_return(['a']) + expect(mod.zrangebyscore('zkey', 0, 100, limit: [0, 10])).to eq ['a'] + end + end + + describe '#zrem' do + it 'calls conn.zrem and returns true' do + allow(conn).to receive(:zrem).with('zkey', 'member1').and_return(1) + expect(mod.zrem('zkey', 'member1')).to be true + end + end + + describe '#expire' do + it 'calls conn.expire and returns true when Redis returns 1' do + allow(conn).to receive(:expire).with('mykey', 3600).and_return(1) + expect(mod.expire('mykey', 3600)).to be true + end + + it 'returns false when Redis returns 0 (key not found)' do + allow(conn).to receive(:expire).with('missing', 60).and_return(0) + expect(mod.expire('missing', 60)).to be false + end + end + end + + describe 'error handling' do + let(:conn) { double('Redis connection') } + let(:pool) { double('ConnectionPool') } + + before do + allow(mod).to receive(:redis_available?).and_return(true) + allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(pool).to receive(:with).and_yield(conn) + end + + it '#hset returns false on StandardError' do + allow(conn).to receive(:hset).and_raise(StandardError, 'fail') + expect(mod.hset('k', { 'a' => '1' })).to be false + end + + it '#hgetall returns nil on StandardError' do + allow(conn).to receive(:hgetall).and_raise(StandardError, 'fail') + expect(mod.hgetall('k')).to be_nil + end + + it '#zadd returns false on StandardError' do + allow(conn).to receive(:zadd).and_raise(StandardError, 'fail') + expect(mod.zadd('k', 1.0, 'm')).to be false + end + + it '#zrangebyscore returns empty array on StandardError' do + allow(conn).to receive(:zrangebyscore).and_raise(StandardError, 'fail') + expect(mod.zrangebyscore('k', 0, 1)).to eq [] + end + + it '#zrem returns false on StandardError' do + allow(conn).to receive(:zrem).and_raise(StandardError, 'fail') + expect(mod.zrem('k', 'm')).to be false + end + + it '#expire returns false on StandardError' do + allow(conn).to receive(:expire).and_raise(StandardError, 'fail') + expect(mod.expire('k', 60)).to be false + end + end +end From 4251ca547c7063b91658a0497b56d09103f0947f Mon Sep 17 00:00:00 2001 From: Esity Date: Sun, 29 Mar 2026 00:55:30 -0500 Subject: [PATCH 058/108] update project documentation --- CLAUDE.md | 18 +++++++++++++++++- README.md | 2 +- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/CLAUDE.md b/CLAUDE.md index de74d7f..58900a6 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -8,7 +8,7 @@ Caching wrapper for the LegionIO framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. **GitHub**: https://github.com/LegionIO/legion-cache -**Version**: 1.3.12 +**Version**: 1.3.17 **License**: Apache-2.0 ## Architecture @@ -39,6 +39,7 @@ Legion::Cache (singleton module) ├── Memory # Lite mode adapter: pure in-memory cache, TTL expiry, Mutex thread-safety │ └── Activated by LEGION_MODE=lite env var; no Redis/Memcached required ├── Helper # Injectable cache mixin for LEX extensions (namespaced cache_*/local_cache_*) +├── RedisHash # Redis-specific sorted set + hash operations (hset/hgetall/hdel/zadd/zrangebyscore/zrem/expire); Redis-only, module_function pattern ├── Local # Local cache tier (localhost Redis/Memcached, fallback target) │ ├── .setup # Connect to local cache server (auto-detect driver) │ ├── .shutdown # Close local connection @@ -134,10 +135,25 @@ Dalli enforces a 1MB client-side limit by default (`value_max_bytes: 1_048_576`) | `lib/legion/cache/memory.rb` | Lite mode Memory adapter: in-memory store with TTL + Mutex thread-safety | | `lib/legion/cache/helper.rb` | Injectable cache mixin for LEX extensions | | `lib/legion/cache/local.rb` | Local cache tier (localhost, fallback target) | +| `lib/legion/cache/redis_hash.rb` | Redis sorted set + hash operations (hset/hgetall/hdel/zadd/zrangebyscore/zrem/expire) | | `lib/legion/cache/pool.rb` | Connection pool management | | `lib/legion/cache/settings.rb` | Default configuration + local defaults | | `lib/legion/cache/version.rb` | VERSION constant | +## PHI TTL Cap + +When `phi: true` is passed to `set`, the TTL is capped at `cache.compliance.phi_max_ttl` (default 3600s). This enforces the HIPAA PHI TTL policy in legion-logging. The `enforce_phi_ttl(ttl, phi: false)` method applies the cap; without `phi: true` the TTL is passed through unchanged. + +```json +{ + "cache": { + "compliance": { + "phi_max_ttl": 3600 + } + } +} +``` + ## Role in LegionIO Optional caching layer initialized during `Legion::Service` startup. Used by `legion-data` for model caching (Sequel caching plugin) and by extensions for general-purpose caching. diff --git a/README.md b/README.md index 50618e6..0b875bc 100644 --- a/README.md +++ b/README.md @@ -2,7 +2,7 @@ Caching wrapper for the [LegionIO](https://github.com/LegionIO/LegionIO) framework. Provides a consistent interface for Memcached (via `dalli`) and Redis (via `redis` gem) with connection pooling. Driver selection is config-driven. -**Version**: 1.3.12 +**Version**: 1.3.17 ## Installation From 649578bdb2c229665a8241d060d9bf379741f2f0 Mon Sep 17 00:00:00 2001 From: Esity Date: Sun, 29 Mar 2026 23:18:46 -0500 Subject: [PATCH 059/108] enhance cache helper with layered TTL, PHI support, status, and pool info --- CHANGELOG.md | 10 ++ lib/legion/cache/helper.rb | 100 +++++++++++++-- lib/legion/cache/settings.rb | 2 + lib/legion/cache/version.rb | 2 +- spec/legion/cache/helper_spec.rb | 212 ++++++++++++++++++++++++++++++- 5 files changed, 311 insertions(+), 15 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index aebc828..9cbe2f3 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,16 @@ ## [Unreleased] +### Added +- Layered TTL resolution in Helper (per-call → LEX override → Settings → FALLBACK_TTL) +- `cache_default_ttl` / `local_cache_default_ttl` — LEX-overridable default TTL methods +- `cache_exist?` / `local_cache_exist?` — key existence checks +- `cache_connected?` / `local_cache_connected?` — connection status helpers +- `cache_pool_size` / `cache_pool_available` — pool info (shared tier) +- `local_cache_pool_size` / `local_cache_pool_available` — pool info (local tier) +- `phi:` keyword argument on `cache_set` / `local_cache_set` for PHI TTL enforcement +- `default_ttl` key in Settings.default and Settings.local (defaults to 60) + ## [1.3.17] - 2026-03-25 ### Added diff --git a/lib/legion/cache/helper.rb b/lib/legion/cache/helper.rb index ac28c18..a2a5fc1 100644 --- a/lib/legion/cache/helper.rb +++ b/lib/legion/cache/helper.rb @@ -3,12 +3,38 @@ module Legion module Cache module Helper + FALLBACK_TTL = 60 + + # --- TTL Resolution --- + # Override in your LEX to set a custom default TTL for the extension. + # Resolution chain: per-call ttl: kwarg -> LEX override -> Settings -> FALLBACK_TTL + def cache_default_ttl + return FALLBACK_TTL unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :default_ttl) || FALLBACK_TTL + rescue StandardError + FALLBACK_TTL + end + + def local_cache_default_ttl + return cache_default_ttl unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache_local, :default_ttl) || cache_default_ttl + rescue StandardError + cache_default_ttl + end + + # --- Namespace --- + def cache_namespace @cache_namespace ||= derive_cache_namespace end - def cache_set(key, value, ttl: 60) - Legion::Cache.set(cache_namespace + key, value, ttl) + # --- Core Operations (shared tier) --- + + def cache_set(key, value, ttl: nil, phi: false) + effective_ttl = ttl || cache_default_ttl + Legion::Cache.set(cache_namespace + key, value, effective_ttl, phi: phi) end def cache_get(key) @@ -19,12 +45,21 @@ def cache_delete(key) Legion::Cache.delete(cache_namespace + key) end - def cache_fetch(key, ttl: 60, &) - Legion::Cache.fetch(cache_namespace + key, ttl, &) + def cache_fetch(key, ttl: nil, &) + effective_ttl = ttl || cache_default_ttl + Legion::Cache.fetch(cache_namespace + key, effective_ttl, &) + end + + def cache_exist?(key) + !Legion::Cache.get(cache_namespace + key).nil? end - def local_cache_set(key, value, ttl: 60) - Legion::Cache::Local.set(cache_namespace + key, value, ttl) + # --- Core Operations (local tier) --- + + def local_cache_set(key, value, ttl: nil, phi: false) + effective_ttl = ttl || local_cache_default_ttl + effective_ttl = Legion::Cache.enforce_phi_ttl(effective_ttl, phi: phi) + Legion::Cache::Local.set(cache_namespace + key, value, effective_ttl) end def local_cache_get(key) @@ -35,8 +70,57 @@ def local_cache_delete(key) Legion::Cache::Local.delete(cache_namespace + key) end - def local_cache_fetch(key, ttl: 60, &) - Legion::Cache::Local.fetch(cache_namespace + key, ttl, &) + def local_cache_fetch(key, ttl: nil, &) + effective_ttl = ttl || local_cache_default_ttl + Legion::Cache::Local.fetch(cache_namespace + key, effective_ttl, &) + end + + def local_cache_exist?(key) + !Legion::Cache::Local.get(cache_namespace + key).nil? + end + + # --- Status --- + + def cache_connected? + Legion::Cache.connected? + end + + def local_cache_connected? + Legion::Cache::Local.connected? + end + + # --- Pool Info --- + + def cache_pool_size + return 0 unless cache_connected? + + Legion::Cache.pool_size + rescue StandardError + 0 + end + + def cache_pool_available + return 0 unless cache_connected? + + Legion::Cache.available + rescue StandardError + 0 + end + + def local_cache_pool_size + return 0 unless local_cache_connected? + + Legion::Cache::Local.pool_size + rescue StandardError + 0 + end + + def local_cache_pool_available + return 0 unless local_cache_connected? + + Legion::Cache::Local.available + rescue StandardError + 0 end private diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 978ede4..6590d0a 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -25,6 +25,7 @@ def self.default cache_nils: false, pool_size: 10, timeout: 5, + default_ttl: 60, serializer: Legion::JSON, cluster: nil, replica: false, @@ -50,6 +51,7 @@ def self.local cache_nils: false, pool_size: 5, timeout: 3, + default_ttl: 60, serializer: Legion::JSON, username: nil, password: nil, diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 1176c57..a3f6187 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.17' + VERSION = '1.3.18' end end diff --git a/spec/legion/cache/helper_spec.rb b/spec/legion/cache/helper_spec.rb index 37017fb..485b82c 100644 --- a/spec/legion/cache/helper_spec.rb +++ b/spec/legion/cache/helper_spec.rb @@ -19,8 +19,56 @@ def lex_filename end) end + let(:custom_ttl_class) do + Class.new do + include Legion::Cache::Helper + + def lex_filename + 'custom_lex' + end + + def cache_default_ttl + 600 + end + end + end + subject { helper_class.new } + describe 'FALLBACK_TTL' do + it 'is 60' do + expect(Legion::Cache::Helper::FALLBACK_TTL).to eq(60) + end + end + + describe '#cache_default_ttl' do + it 'returns the settings value' do + expect(subject.cache_default_ttl).to eq(60) + end + + it 'falls back to FALLBACK_TTL when settings key is nil' do + allow(Legion::Settings).to receive(:dig).with(:cache, :default_ttl).and_return(nil) + expect(subject.cache_default_ttl).to eq(60) + end + + it 'can be overridden by a LEX' do + obj = custom_ttl_class.new + expect(obj.cache_default_ttl).to eq(600) + end + end + + describe '#local_cache_default_ttl' do + it 'returns the local settings value' do + expect(subject.local_cache_default_ttl).to eq(60) + end + + it 'falls back to cache_default_ttl when local key is nil' do + allow(Legion::Settings).to receive(:dig).with(:cache_local, :default_ttl).and_return(nil) + allow(Legion::Settings).to receive(:dig).with(:cache, :default_ttl).and_return(120) + expect(subject.local_cache_default_ttl).to eq(120) + end + end + describe '#cache_namespace' do it 'derives from lex_filename' do expect(subject.cache_namespace).to eq('microsoft_teams') @@ -32,13 +80,31 @@ def lex_filename end end - describe '#cache_set / #cache_get' do - it 'delegates to Legion::Cache with namespaced key' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', 120) + describe '#cache_set' do + it 'delegates to Legion::Cache with namespaced key and explicit TTL' do + expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', 120, phi: false) subject.cache_set(':messages', 'data', ttl: 120) end - it 'delegates get to Legion::Cache with namespaced key' do + it 'uses cache_default_ttl when ttl is not provided' do + expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', 60, phi: false) + subject.cache_set(':messages', 'data') + end + + it 'uses LEX override TTL when defined' do + obj = custom_ttl_class.new + expect(Legion::Cache).to receive(:set).with('custom_lex:key', 'val', 600, phi: false) + obj.cache_set(':key', 'val') + end + + it 'forwards phi: true to Legion::Cache.set' do + expect(Legion::Cache).to receive(:set).with('microsoft_teams:phi_data', 'secret', 7200, phi: true) + subject.cache_set(':phi_data', 'secret', ttl: 7200, phi: true) + end + end + + describe '#cache_get' do + it 'delegates to Legion::Cache with namespaced key' do expect(Legion::Cache).to receive(:get).with('microsoft_teams:messages').and_return('data') expect(subject.cache_get(':messages')).to eq('data') end @@ -51,13 +117,52 @@ def lex_filename end end - describe '#local_cache_set / #local_cache_get' do + describe '#cache_fetch' do + it 'delegates to Legion::Cache with namespaced key and explicit TTL' do + expect(Legion::Cache).to receive(:fetch).with('microsoft_teams:key', 120) + subject.cache_fetch(':key', ttl: 120) + end + + it 'uses cache_default_ttl when ttl is not provided' do + expect(Legion::Cache).to receive(:fetch).with('microsoft_teams:key', 60) + subject.cache_fetch(':key') + end + end + + describe '#cache_exist?' do + it 'returns true when key has a value' do + expect(Legion::Cache).to receive(:get).with('microsoft_teams:key').and_return('val') + expect(subject.cache_exist?(':key')).to be true + end + + it 'returns false when key is absent' do + expect(Legion::Cache).to receive(:get).with('microsoft_teams:key').and_return(nil) + expect(subject.cache_exist?(':key')).to be false + end + end + + describe '#local_cache_set' do it 'delegates to Legion::Cache::Local with namespaced key' do + allow(Legion::Cache).to receive(:enforce_phi_ttl).with(60, phi: false).and_return(60) expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', 60) subject.local_cache_set(':hwm', 'ts') end - it 'delegates get to Legion::Cache::Local with namespaced key' do + it 'uses explicit TTL when provided' do + allow(Legion::Cache).to receive(:enforce_phi_ttl).with(300, phi: false).and_return(300) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', 300) + subject.local_cache_set(':hwm', 'ts', ttl: 300) + end + + it 'enforces PHI TTL cap' do + allow(Legion::Cache).to receive(:enforce_phi_ttl).with(7200, phi: true).and_return(3600) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:phi', 'data', 3600) + subject.local_cache_set(':phi', 'data', ttl: 7200, phi: true) + end + end + + describe '#local_cache_get' do + it 'delegates to Legion::Cache::Local with namespaced key' do expect(Legion::Cache::Local).to receive(:get).with('microsoft_teams:hwm').and_return('ts') expect(subject.local_cache_get(':hwm')).to eq('ts') end @@ -69,4 +174,99 @@ def lex_filename subject.local_cache_delete(':hwm') end end + + describe '#local_cache_fetch' do + it 'uses local_cache_default_ttl when ttl is not provided' do + expect(Legion::Cache::Local).to receive(:fetch).with('microsoft_teams:key', 60) + subject.local_cache_fetch(':key') + end + + it 'uses explicit TTL when provided' do + expect(Legion::Cache::Local).to receive(:fetch).with('microsoft_teams:key', 300) + subject.local_cache_fetch(':key', ttl: 300) + end + end + + describe '#local_cache_exist?' do + it 'returns true when key has a value' do + expect(Legion::Cache::Local).to receive(:get).with('microsoft_teams:key').and_return('val') + expect(subject.local_cache_exist?(':key')).to be true + end + + it 'returns false when key is absent' do + expect(Legion::Cache::Local).to receive(:get).with('microsoft_teams:key').and_return(nil) + expect(subject.local_cache_exist?(':key')).to be false + end + end + + describe '#cache_connected?' do + it 'delegates to Legion::Cache.connected?' do + allow(Legion::Cache).to receive(:connected?).and_return(true) + expect(subject.cache_connected?).to be true + end + + it 'returns false when not connected' do + allow(Legion::Cache).to receive(:connected?).and_return(false) + expect(subject.cache_connected?).to be false + end + end + + describe '#local_cache_connected?' do + it 'delegates to Legion::Cache::Local.connected?' do + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + expect(subject.local_cache_connected?).to be true + end + end + + describe '#cache_pool_size' do + it 'returns pool size when connected' do + allow(Legion::Cache).to receive(:connected?).and_return(true) + allow(Legion::Cache).to receive(:pool_size).and_return(10) + expect(subject.cache_pool_size).to eq(10) + end + + it 'returns 0 when not connected' do + allow(Legion::Cache).to receive(:connected?).and_return(false) + expect(subject.cache_pool_size).to eq(0) + end + end + + describe '#cache_pool_available' do + it 'returns available connections when connected' do + allow(Legion::Cache).to receive(:connected?).and_return(true) + allow(Legion::Cache).to receive(:available).and_return(8) + expect(subject.cache_pool_available).to eq(8) + end + + it 'returns 0 when not connected' do + allow(Legion::Cache).to receive(:connected?).and_return(false) + expect(subject.cache_pool_available).to eq(0) + end + end + + describe '#local_cache_pool_size' do + it 'returns pool size when connected' do + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:pool_size).and_return(5) + expect(subject.local_cache_pool_size).to eq(5) + end + + it 'returns 0 when not connected' do + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + expect(subject.local_cache_pool_size).to eq(0) + end + end + + describe '#local_cache_pool_available' do + it 'returns available connections when connected' do + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:available).and_return(4) + expect(subject.local_cache_pool_available).to eq(4) + end + + it 'returns 0 when not connected' do + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + expect(subject.local_cache_pool_available).to eq(0) + end + end end From 591a760a279ea289ef692fc2aeb3cb27688c18ad Mon Sep 17 00:00:00 2001 From: Esity Date: Sun, 29 Mar 2026 23:28:40 -0500 Subject: [PATCH 060/108] apply copilot review suggestions (#5) --- CHANGELOG.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/CHANGELOG.md b/CHANGELOG.md index 9cbe2f3..31d994d 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,8 @@ ## [Unreleased] +## [1.3.18] - 2026-03-29 + ### Added - Layered TTL resolution in Helper (per-call → LEX override → Settings → FALLBACK_TTL) - `cache_default_ttl` / `local_cache_default_ttl` — LEX-overridable default TTL methods From 07b8b4500de94a4ed1199c9d225a5dfc71ac7015 Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 31 Mar 2026 18:27:48 -0500 Subject: [PATCH 061/108] add batch and redis hash helper methods (#3, #4) --- CHANGELOG.md | 6 + Gemfile | 1 + lib/legion/cache/helper.rb | 206 +++++++++++++++++++ lib/legion/cache/version.rb | 2 +- spec/legion/cache/helper_spec.rb | 328 +++++++++++++++++++++++++++++++ spec/spec_helper.rb | 1 + 6 files changed, 543 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 31d994d..f28066b 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,12 @@ ## [Unreleased] +## [1.3.19] - 2026-03-31 + +### Added +- `cache_mget` / `cache_mset` (and `local_cache_mget` / `local_cache_mset`) on `Helper` mixin — delegates to Redis batch ops, falls back to sequential get/set on Memcached (closes #3) +- `cache_hset`, `cache_hgetall`, `cache_hdel`, `cache_zadd`, `cache_zrangebyscore`, `cache_zrem`, `cache_expire` on `Helper` mixin — delegates to `RedisHash` with namespace prefixing; hash ops fall back to JSON-serialized Memcached values, sorted-set ops raise `NotImplementedError`, expire is a no-op on Memcached (closes #4) + ## [1.3.18] - 2026-03-29 ### Added diff --git a/Gemfile b/Gemfile index f6c3759..4c18b66 100644 --- a/Gemfile +++ b/Gemfile @@ -8,5 +8,6 @@ group :test do gem 'rspec' gem 'rspec_junit_formatter' gem 'rubocop' + gem 'rubocop-legion' gem 'simplecov' end diff --git a/lib/legion/cache/helper.rb b/lib/legion/cache/helper.rb index a2a5fc1..c1e58bf 100644 --- a/lib/legion/cache/helper.rb +++ b/lib/legion/cache/helper.rb @@ -54,6 +54,162 @@ def cache_exist?(key) !Legion::Cache.get(cache_namespace + key).nil? end + # --- Batch Operations (shared tier) --- + # Issue #3: mget/mset with Memcached safety + + # Returns a Hash of { key => value } pairs. Prefixes all keys with cache_namespace. + # Delegates to Legion::Cache.mget on Redis; falls back to sequential gets on Memcached. + def cache_mget(*keys) + keys = keys.flatten + return {} if keys.empty? + + namespaced = keys.map { |k| cache_namespace + k } + + if cache_redis? + raw = Legion::Cache.mget(*namespaced) + keys.to_h { |k| [k, raw[cache_namespace + k]] } + else + keys.to_h { |k| [k, Legion::Cache.get(cache_namespace + k)] } + end + rescue StandardError => e + log_cache_error('cache_mget', e) + {} + end + + # Stores multiple key-value pairs. Accepts a Hash of { key => value }. + # TTL follows the same resolution chain as cache_set. + # Delegates to Legion::Cache.mset on Redis; falls back to sequential sets on Memcached. + def cache_mset(hash, ttl: nil) + return true if hash.empty? + + effective_ttl = ttl || cache_default_ttl + + if cache_redis? + namespaced = hash.transform_keys { |k| cache_namespace + k } + Legion::Cache.mset(namespaced) + else + hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, effective_ttl) } + true + end + rescue StandardError => e + log_cache_error('cache_mset', e) + false + end + + # --- Batch Operations (local tier) --- + + def local_cache_mget(*keys) + keys = keys.flatten + return {} if keys.empty? + + if local_cache_redis? + namespaced = keys.map { |k| cache_namespace + k } + raw = Legion::Cache::Local.mget(*namespaced) + keys.to_h { |k| [k, raw[cache_namespace + k]] } + else + keys.to_h { |k| [k, Legion::Cache::Local.get(cache_namespace + k)] } + end + rescue StandardError => e + log_cache_error('local_cache_mget', e) + {} + end + + def local_cache_mset(hash, ttl: nil) + return true if hash.empty? + + effective_ttl = ttl || local_cache_default_ttl + + if local_cache_redis? + namespaced = hash.transform_keys { |k| cache_namespace + k } + Legion::Cache::Local.mset(namespaced) + else + hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, effective_ttl) } + true + end + rescue StandardError => e + log_cache_error('local_cache_mset', e) + false + end + + # --- RedisHash Helpers (shared tier) --- + # Issue #4: namespaced wrappers for RedisHash operations with Memcached fallback + + def cache_hset(key, hash) + if cache_redis? + Legion::Cache::RedisHash.hset(cache_namespace + key, hash) + else + memcached_hash_merge(cache_namespace + key, hash) + end + rescue StandardError => e + log_cache_error('cache_hset', e) + false + end + + def cache_hgetall(key) + if cache_redis? + Legion::Cache::RedisHash.hgetall(cache_namespace + key) + else + memcached_hash_load(cache_namespace + key) + end + rescue StandardError => e + log_cache_error('cache_hgetall', e) + nil + end + + def cache_hdel(key, *fields) + if cache_redis? + Legion::Cache::RedisHash.hdel(cache_namespace + key, *fields) + else + memcached_hash_delete_fields(cache_namespace + key, fields) + end + rescue StandardError => e + log_cache_error('cache_hdel', e) + 0 + end + + def cache_zadd(key, score, member) + raise_sorted_set_unsupported('cache_zadd') unless cache_redis? + + Legion::Cache::RedisHash.zadd(cache_namespace + key, score, member) + rescue NotImplementedError + raise + rescue StandardError => e + log_cache_error('cache_zadd', e) + false + end + + def cache_zrangebyscore(key, min, max, limit: nil) + raise_sorted_set_unsupported('cache_zrangebyscore') unless cache_redis? + + Legion::Cache::RedisHash.zrangebyscore(cache_namespace + key, min, max, limit: limit) + rescue NotImplementedError + raise + rescue StandardError => e + log_cache_error('cache_zrangebyscore', e) + [] + end + + def cache_zrem(key, member) + raise_sorted_set_unsupported('cache_zrem') unless cache_redis? + + Legion::Cache::RedisHash.zrem(cache_namespace + key, member) + rescue NotImplementedError + raise + rescue StandardError => e + log_cache_error('cache_zrem', e) + false + end + + # Sets TTL on a key. No-op on Memcached (TTL is set at write time). + def cache_expire(key, seconds) + return false unless cache_redis? + + Legion::Cache::RedisHash.expire(cache_namespace + key, seconds) + rescue StandardError => e + log_cache_error('cache_expire', e) + false + end + # --- Core Operations (local tier) --- def local_cache_set(key, value, ttl: nil, phi: false) @@ -147,6 +303,56 @@ def derive_cache_namespace_from_class .gsub(/([a-z\d])([A-Z])/, '\1_\2') .downcase end + + def cache_redis? + Legion::Cache::RedisHash.redis_available? + end + + def local_cache_redis? + defined?(Legion::Cache::Local) && + Legion::Cache::Local.respond_to?(:mget) && + Legion::Cache::Local.connected? + end + + def memcached_hash_merge(full_key, new_fields) + current = memcached_hash_load(full_key) || {} + merged = current.merge(new_fields.transform_keys(&:to_s)) + Legion::Cache.set(full_key, Legion::JSON.dump(merged), cache_default_ttl) + true + end + + def memcached_hash_load(full_key) + raw = Legion::Cache.get(full_key) + return nil if raw.nil? + + parsed = Legion::JSON.load(raw) + # Legion::JSON.load returns symbol keys; convert to string keys to mirror Redis hgetall + parsed.transform_keys(&:to_s) + rescue StandardError + nil + end + + def memcached_hash_delete_fields(full_key, fields) + current = memcached_hash_load(full_key) + return 0 if current.nil? + + str_fields = fields.map(&:to_s) + removed = str_fields.count { |f| current.key?(f) } + str_fields.each { |f| current.delete(f) } + Legion::Cache.set(full_key, Legion::JSON.dump(current), cache_default_ttl) + removed + end + + def raise_sorted_set_unsupported(method) + raise NotImplementedError, + "#{method} requires a Redis backend — sorted sets are not supported on Memcached" + end + + def log_cache_error(method, error) + return unless defined?(Legion::Logging) + + Legion::Logging.warn "[cache:helper] #{method} failed: #{error.class} — #{error.message}" + end end end end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index a3f6187..0baab6f 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.18' + VERSION = '1.3.19' end end diff --git a/spec/legion/cache/helper_spec.rb b/spec/legion/cache/helper_spec.rb index 485b82c..6dce1ca 100644 --- a/spec/legion/cache/helper_spec.rb +++ b/spec/legion/cache/helper_spec.rb @@ -269,4 +269,332 @@ def cache_default_ttl expect(subject.local_cache_pool_available).to eq(0) end end + + # --- Issue #3: cache_mget / cache_mset --- + + describe '#cache_mget' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to Legion::Cache.mget with namespaced keys and un-namespaces the result' do + allow(Legion::Cache).to receive(:mget).with('microsoft_teams:a', 'microsoft_teams:b') + .and_return({ 'microsoft_teams:a' => 'v1', 'microsoft_teams:b' => 'v2' }) + expect(subject.cache_mget(':a', ':b')).to eq({ ':a' => 'v1', ':b' => 'v2' }) + end + + it 'returns empty hash for empty key list' do + expect(subject.cache_mget).to eq({}) + end + + it 'returns empty hash on error' do + allow(Legion::Cache).to receive(:mget).and_raise(StandardError, 'fail') + expect(subject.cache_mget(':x')).to eq({}) + end + end + + context 'with Memcached backend' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'falls back to sequential gets and un-namespaces keys' do + allow(Legion::Cache).to receive(:get).with('microsoft_teams:a').and_return('v1') + allow(Legion::Cache).to receive(:get).with('microsoft_teams:b').and_return('v2') + expect(subject.cache_mget(':a', ':b')).to eq({ ':a' => 'v1', ':b' => 'v2' }) + end + + it 'accepts an array argument' do + allow(Legion::Cache).to receive(:get).with('microsoft_teams:x').and_return('vx') + expect(subject.cache_mget([':x'])).to eq({ ':x' => 'vx' }) + end + end + end + + describe '#cache_mset' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to Legion::Cache.mset with namespaced keys' do + expect(Legion::Cache).to receive(:mset).with({ 'microsoft_teams:a' => 'v1', 'microsoft_teams:b' => 'v2' }) + subject.cache_mset({ ':a' => 'v1', ':b' => 'v2' }) + end + + it 'returns true for empty hash without calling mset' do + expect(Legion::Cache).not_to receive(:mset) + expect(subject.cache_mset({})).to be true + end + + it 'returns false on error' do + allow(Legion::Cache).to receive(:mset).and_raise(StandardError, 'fail') + expect(subject.cache_mset({ ':x' => 'v' })).to be false + end + end + + context 'with Memcached backend' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'falls back to sequential sets using default TTL' do + expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', 60) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', 60) + subject.cache_mset({ ':a' => 'v1', ':b' => 'v2' }) + end + + it 'uses explicit TTL when provided' do + expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', 300) + subject.cache_mset({ ':k' => 'val' }, ttl: 300) + end + + it 'returns true on success' do + allow(Legion::Cache).to receive(:set) + expect(subject.cache_mset({ ':k' => 'v' })).to be true + end + end + end + + describe '#local_cache_mget' do + context 'with Redis local backend' do + before do + allow(subject).to receive(:local_cache_redis?).and_return(true) + allow(Legion::Cache::Local).to receive(:mget).with('microsoft_teams:a') + .and_return({ 'microsoft_teams:a' => 'lv1' }) + end + + it 'delegates to Legion::Cache::Local.mget and un-namespaces keys' do + expect(subject.local_cache_mget(':a')).to eq({ ':a' => 'lv1' }) + end + end + + context 'with Memcached local backend' do + before { allow(subject).to receive(:local_cache_redis?).and_return(false) } + + it 'falls back to sequential local gets' do + allow(Legion::Cache::Local).to receive(:get).with('microsoft_teams:a').and_return('lv1') + expect(subject.local_cache_mget(':a')).to eq({ ':a' => 'lv1' }) + end + end + + it 'returns empty hash for empty key list' do + expect(subject.local_cache_mget).to eq({}) + end + end + + describe '#local_cache_mset' do + context 'with Redis local backend' do + before { allow(subject).to receive(:local_cache_redis?).and_return(true) } + + it 'delegates to Legion::Cache::Local.mset with namespaced keys' do + expect(Legion::Cache::Local).to receive(:mset).with({ 'microsoft_teams:k' => 'v' }) + subject.local_cache_mset({ ':k' => 'v' }) + end + end + + context 'with Memcached local backend' do + before { allow(subject).to receive(:local_cache_redis?).and_return(false) } + + it 'falls back to sequential local sets' do + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', 60) + subject.local_cache_mset({ ':k' => 'v' }) + end + + it 'uses explicit TTL when provided' do + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', 120) + subject.local_cache_mset({ ':k' => 'v' }, ttl: 120) + end + end + + it 'returns true for empty hash' do + expect(subject.local_cache_mset({})).to be true + end + end + + # --- Issue #4: RedisHash helper methods --- + + describe '#cache_hset' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to RedisHash.hset with namespaced key' do + expect(Legion::Cache::RedisHash).to receive(:hset).with('microsoft_teams:h', { 'f' => 'v' }).and_return(true) + expect(subject.cache_hset(':h', { 'f' => 'v' })).to be true + end + + it 'returns false on error' do + allow(Legion::Cache::RedisHash).to receive(:hset).and_raise(StandardError, 'fail') + expect(subject.cache_hset(':h', {})).to be false + end + end + + context 'with Memcached backend' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'serializes hash as JSON via cache set (merge)' do + allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return(nil) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:h', '{"f":"v"}', 60) + subject.cache_hset(':h', { 'f' => 'v' }) + end + + it 'merges new fields into existing JSON hash' do + allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return('{"existing":"val"}') + expect(Legion::Cache).to receive(:set) do |_key, json, _ttl| + parsed = Legion::JSON.load(json) + expect(parsed).to include(existing: 'val', f: 'v') + end + subject.cache_hset(':h', { 'f' => 'v' }) + end + end + end + + describe '#cache_hgetall' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to RedisHash.hgetall with namespaced key' do + expect(Legion::Cache::RedisHash).to receive(:hgetall).with('microsoft_teams:h').and_return({ 'f' => 'v' }) + expect(subject.cache_hgetall(':h')).to eq({ 'f' => 'v' }) + end + + it 'returns nil on error' do + allow(Legion::Cache::RedisHash).to receive(:hgetall).and_raise(StandardError, 'fail') + expect(subject.cache_hgetall(':h')).to be_nil + end + end + + context 'with Memcached backend' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'deserializes JSON from cache and returns string-key hash' do + allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return('{"f":"v"}') + result = subject.cache_hgetall(':h') + expect(result).to eq({ 'f' => 'v' }) + end + + it 'returns nil when key is absent' do + allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return(nil) + expect(subject.cache_hgetall(':h')).to be_nil + end + end + end + + describe '#cache_hdel' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to RedisHash.hdel with namespaced key' do + expect(Legion::Cache::RedisHash).to receive(:hdel).with('microsoft_teams:h', 'f1').and_return(1) + expect(subject.cache_hdel(':h', 'f1')).to eq(1) + end + + it 'returns 0 on error' do + allow(Legion::Cache::RedisHash).to receive(:hdel).and_raise(StandardError, 'fail') + expect(subject.cache_hdel(':h', 'f')).to eq(0) + end + end + + context 'with Memcached backend' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'removes specified fields from JSON hash and returns count' do + allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return('{"a":"1","b":"2"}') + expect(Legion::Cache).to receive(:set).with('microsoft_teams:h', anything, 60) do |_k, json, _ttl| + parsed = Legion::JSON.load(json) + expect(parsed.keys.map(&:to_s)).not_to include('a') + end + expect(subject.cache_hdel(':h', 'a')).to eq(1) + end + + it 'returns 0 when key is absent' do + allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return(nil) + expect(subject.cache_hdel(':h', 'f')).to eq(0) + end + end + end + + describe '#cache_zadd' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to RedisHash.zadd with namespaced key' do + expect(Legion::Cache::RedisHash).to receive(:zadd).with('microsoft_teams:z', 1.5, 'member').and_return(true) + expect(subject.cache_zadd(':z', 1.5, 'member')).to be true + end + end + + context 'with Memcached backend' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'raises NotImplementedError' do + expect { subject.cache_zadd(':z', 1.0, 'm') }.to raise_error(NotImplementedError, /cache_zadd/) + end + end + end + + describe '#cache_zrangebyscore' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to RedisHash.zrangebyscore with namespaced key' do + expect(Legion::Cache::RedisHash).to receive(:zrangebyscore) + .with('microsoft_teams:z', 0, 100, limit: nil) + .and_return(%w[a b]) + expect(subject.cache_zrangebyscore(':z', 0, 100)).to eq(%w[a b]) + end + + it 'passes limit option' do + expect(Legion::Cache::RedisHash).to receive(:zrangebyscore) + .with('microsoft_teams:z', 0, 100, limit: [0, 5]) + .and_return(['a']) + expect(subject.cache_zrangebyscore(':z', 0, 100, limit: [0, 5])).to eq(['a']) + end + end + + context 'with Memcached backend' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'raises NotImplementedError' do + expect { subject.cache_zrangebyscore(':z', 0, 100) }.to raise_error(NotImplementedError, /cache_zrangebyscore/) + end + end + end + + describe '#cache_zrem' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to RedisHash.zrem with namespaced key' do + expect(Legion::Cache::RedisHash).to receive(:zrem).with('microsoft_teams:z', 'm').and_return(true) + expect(subject.cache_zrem(':z', 'm')).to be true + end + end + + context 'with Memcached backend' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'raises NotImplementedError' do + expect { subject.cache_zrem(':z', 'm') }.to raise_error(NotImplementedError, /cache_zrem/) + end + end + end + + describe '#cache_expire' do + context 'with Redis backend' do + before { allow(subject).to receive(:cache_redis?).and_return(true) } + + it 'delegates to RedisHash.expire with namespaced key' do + expect(Legion::Cache::RedisHash).to receive(:expire).with('microsoft_teams:k', 300).and_return(true) + expect(subject.cache_expire(':k', 300)).to be true + end + + it 'returns false on error' do + allow(Legion::Cache::RedisHash).to receive(:expire).and_raise(StandardError, 'fail') + expect(subject.cache_expire(':k', 60)).to be false + end + end + + context 'with Memcached backend (no-op)' do + before { allow(subject).to receive(:cache_redis?).and_return(false) } + + it 'returns false without calling RedisHash' do + expect(Legion::Cache::RedisHash).not_to receive(:expire) + expect(subject.cache_expire(':k', 300)).to be false + end + end + end end diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb index 27d1874..8118a97 100644 --- a/spec/spec_helper.rb +++ b/spec/spec_helper.rb @@ -11,6 +11,7 @@ require 'legion/cache/settings' require 'legion/cache/version' require 'legion/cache/local' +require 'legion/cache/redis_hash' require 'legion/cache/helper' Legion::Settings.merge_settings('cache', Legion::Cache::Settings.default) From 79de3a42db6240010294ffd6cdca89e2c9b523d3 Mon Sep 17 00:00:00 2001 From: Esity Date: Tue, 31 Mar 2026 20:58:50 -0500 Subject: [PATCH 062/108] fix redis timeout and reconnect settings not forwarded to client MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit timeout setting (default 5s) was only used for ConnectionPool checkout, never passed to ::Redis.new — redis gem silently used its own 1.0s default for connect/read/write timeouts. This caused spurious timeouts on service mesh connections where DNS resolution + TCP handshake exceeds 1s. Also bumps reconnect_attempts from 1 (instant) to 3 with escalating backoff delays (0s, 0.5s, 1s for shared; 0s, 0.25s, 0.5s for local), improving recovery from transient Redis disconnections. --- CHANGELOG.md | 9 +++++++++ lib/legion/cache/redis.rb | 9 +++++---- lib/legion/cache/settings.rb | 4 ++-- lib/legion/cache/version.rb | 2 +- 4 files changed, 17 insertions(+), 7 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index f28066b..3edf4dc 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,15 @@ ## [Unreleased] +## [1.3.20] - 2026-03-31 + +### Fixed +- Forward `timeout` setting to `::Redis.new` — was silently using redis gem's 1.0s default instead of configured 5s, causing spurious timeouts on service mesh connections +- Forward `timeout` to `::Redis.new` in cluster mode path as well + +### Changed +- Increase `reconnect_attempts` from `1` to `[0, 0.5, 1]` (shared) / `[0, 0.25, 0.5]` (local) — 3 retries with escalating backoff instead of 1 instant retry, improving resilience for service mesh and remote Redis connections + ## [1.3.19] - 2026-03-31 ### Added diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 918588a..ae81c79 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -12,7 +12,7 @@ module Redis extend self def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, replica: false, # rubocop:disable Metrics/ParameterLists - fixed_hostname: nil, username: nil, password: nil, db: nil, reconnect_attempts: 1, **) + fixed_hostname: nil, username: nil, password: nil, db: nil, reconnect_attempts: [0, 0.5, 1], **) return @client unless @client.nil? @pool_size = pool_size @@ -31,10 +31,10 @@ def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, re end def build_redis_client(server: nil, servers: [], cluster: nil, replica: false, fixed_hostname: nil, # rubocop:disable Metrics/ParameterLists - username: nil, password: nil, db: nil, reconnect_attempts: 1) + username: nil, password: nil, db: nil, reconnect_attempts: [0, 0.5, 1]) nodes = Array(cluster).compact if nodes.any? - opts = { cluster: nodes, reconnect_attempts: reconnect_attempts } + opts = { cluster: nodes, reconnect_attempts: reconnect_attempts, timeout: @timeout } opts[:replica] = true if replica opts[:fixed_hostname] = fixed_hostname unless fixed_hostname.nil? opts[:username] = username unless username.nil? @@ -45,7 +45,8 @@ def build_redis_client(server: nil, servers: [], cluster: nil, replica: false, f driver: 'redis', server: server, servers: servers ) host, port = resolved.first.split(':') - redis_opts = { host: host, port: port.to_i, reconnect_attempts: reconnect_attempts } + redis_opts = { host: host, port: port.to_i, reconnect_attempts: reconnect_attempts, + timeout: @timeout } redis_opts[:username] = username unless username.nil? redis_opts[:password] = password unless password.nil? redis_opts[:db] = db unless db.nil? diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 6590d0a..62062b0 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -33,7 +33,7 @@ def self.default username: nil, password: nil, db: nil, - reconnect_attempts: 1 + reconnect_attempts: [0, 0.5, 1].freeze } end @@ -56,7 +56,7 @@ def self.local username: nil, password: nil, db: nil, - reconnect_attempts: 1 + reconnect_attempts: [0, 0.25, 0.5].freeze } end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 0baab6f..40eeb27 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.19' + VERSION = '1.3.20' end end From 407f2864e6faecd37766631d7385abd390d4e9de Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 15:32:21 -0500 Subject: [PATCH 063/108] uplift cache runtime logging --- legion-cache.gemspec | 2 +- lib/legion/cache.rb | 33 +++++++++++++------- lib/legion/cache/cacheable.rb | 11 ++++--- lib/legion/cache/helper.rb | 29 +++++++++++------- lib/legion/cache/local.rb | 44 ++++++++++++++++++++------- lib/legion/cache/memcached.rb | 55 ++++++++++++++++++++++++++++------ lib/legion/cache/memory.rb | 26 +++++++++++++--- lib/legion/cache/pool.rb | 27 +++++++++++++++-- lib/legion/cache/redis.rb | 51 ++++++++++++++++++------------- lib/legion/cache/redis_hash.rb | 30 ++++++++++++++----- lib/legion/cache/settings.rb | 31 +++++++++++++------ 11 files changed, 250 insertions(+), 89 deletions(-) diff --git a/legion-cache.gemspec b/legion-cache.gemspec index 8d4dd17..3cdd507 100644 --- a/legion-cache.gemspec +++ b/legion-cache.gemspec @@ -28,7 +28,7 @@ Gem::Specification.new do |spec| spec.add_dependency 'connection_pool', '>= 2.4' spec.add_dependency 'dalli', '>= 3.0' - spec.add_dependency 'legion-logging', '>= 1.2.8' + spec.add_dependency 'legion-logging', '>= 1.4.3' spec.add_dependency 'legion-settings', '>= 1.3.12' spec.add_dependency 'redis', '>= 5.0' end diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 5479e74..33a1adb 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -1,5 +1,6 @@ # frozen_string_literal: true +require 'legion/logging/helper' require 'legion/cache/version' require 'legion/cache/settings' require 'legion/cache/cacheable' @@ -13,6 +14,8 @@ module Legion module Cache + extend Legion::Logging::Helper + if Legion::Cache::Settings.normalize_driver(Legion::Settings[:cache][:driver]) == 'redis' extend Legion::Cache::Redis else @@ -20,6 +23,8 @@ module Cache end class << self + include Legion::Logging::Helper + def setup(**) return Legion::Settings[:cache][:connected] = true if connected? @@ -28,16 +33,17 @@ def setup(**) @using_memory = true @connected = true Legion::Settings[:cache][:connected] = true - Legion::Logging.info 'Legion::Cache using in-memory adapter (lite mode)' if defined?(Legion::Logging) + log.info 'Legion::Cache using in-memory adapter (lite mode)' return end + log.debug { "Legion::Cache setup driver=#{Legion::Settings[:cache][:driver]} servers=#{Array(Legion::Settings[:cache][:servers]).size}" } setup_local setup_shared(**) end def shutdown - Legion::Logging.info 'Shutting down Legion::Cache' + log.info 'Shutting down Legion::Cache' if @using_memory Legion::Cache::Memory.shutdown else @@ -69,7 +75,8 @@ def phi_max_ttl return 3600 unless defined?(Legion::Settings) Legion::Settings.dig(:cache, :compliance, :phi_max_ttl) || 3600 - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_phi_max_ttl) 3600 end @@ -117,30 +124,34 @@ def setup_local Legion::Cache::Local.setup rescue StandardError => e - Legion::Logging.warn "Local cache setup failed: #{e.message}" if defined?(Legion::Logging) + report_exception(e, level: :warn, handled: true, operation: :setup_local) end def setup_shared(**) - client(**Legion::Settings[:cache], **) + client(**Legion::Settings[:cache], logger: log, **) @connected = true @using_local = false Legion::Settings[:cache][:connected] = true - if defined?(Legion::Logging) - driver = Legion::Settings[:cache][:driver] || 'dalli' - servers = Array(Legion::Settings[:cache][:servers]).join(', ') - Legion::Logging.info "Legion::Cache connected (driver=#{driver}) to #{servers}" - end + driver = Legion::Settings[:cache][:driver] || 'dalli' + servers = Array(Legion::Settings[:cache][:servers]).join(', ') + log.info "Legion::Cache connected (driver=#{driver}) to #{servers}" rescue StandardError => e - Legion::Logging.warn "Shared cache unavailable (#{e.message}), falling back to Local" if defined?(Legion::Logging) + report_exception(e, level: :warn, handled: true, operation: :setup_shared, fallback: :local) if Legion::Cache::Local.connected? @using_local = true @connected = true Legion::Settings[:cache][:connected] = true + log.info 'Legion::Cache fell back to Local cache' else @connected = false Legion::Settings[:cache][:connected] = false + log.error 'Legion::Cache shared and local adapters are unavailable' end end + + def report_exception(exception, level:, handled:, **) + handle_exception(exception, level: level, handled: handled, **) + end end end end diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index 63c0746..b02a94b 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -1,10 +1,13 @@ # frozen_string_literal: true require 'digest' +require 'legion/logging/helper' module Legion module Cache module Cacheable + extend Legion::Logging::Helper + def self.extended(base) base.instance_variable_set(:@cached_methods, {}) end @@ -29,9 +32,9 @@ def cache_method(method_name, ttl:, scope: :local, exclude_from_key: []) unless bypass_local_method_cache cached = Legion::Cache::Cacheable.cache_read(key, scope: config[:scope]) if cached.nil? - Legion::Logging.debug "[cacheable] miss key=#{key}" if defined?(Legion::Logging) + Legion::Cache::Cacheable.log.debug "[cacheable] miss key=#{key}" else - Legion::Logging.debug "[cacheable] hit key=#{key}" if defined?(Legion::Logging) + Legion::Cache::Cacheable.log.debug "[cacheable] hit key=#{key}" return cached end end @@ -92,7 +95,7 @@ def self.local_cache_read(key) Legion::Cache::Local.get(key) rescue StandardError => e - Legion::Logging.warn "[cacheable] local_cache_read failed key=#{key} error=#{e.message}" if defined?(Legion::Logging) + handle_exception(e, level: :warn, operation: :local_cache_read, key: key) nil end @@ -101,7 +104,7 @@ def self.local_cache_write(key, value, ttl) Legion::Cache::Local.set(key, value, ttl) rescue StandardError => e - Legion::Logging.warn "[cacheable] local_cache_write failed key=#{key} error=#{e.message}" if defined?(Legion::Logging) + handle_exception(e, level: :warn, operation: :local_cache_write, key: key, ttl: ttl) nil end diff --git a/lib/legion/cache/helper.rb b/lib/legion/cache/helper.rb index c1e58bf..502b3da 100644 --- a/lib/legion/cache/helper.rb +++ b/lib/legion/cache/helper.rb @@ -1,8 +1,12 @@ # frozen_string_literal: true +require 'legion/logging/helper' + module Legion module Cache module Helper + include Legion::Logging::Helper + FALLBACK_TTL = 60 # --- TTL Resolution --- @@ -12,7 +16,8 @@ def cache_default_ttl return FALLBACK_TTL unless defined?(Legion::Settings) Legion::Settings.dig(:cache, :default_ttl) || FALLBACK_TTL - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_default_ttl) FALLBACK_TTL end @@ -20,7 +25,8 @@ def local_cache_default_ttl return cache_default_ttl unless defined?(Legion::Settings) Legion::Settings.dig(:cache_local, :default_ttl) || cache_default_ttl - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :local_cache_default_ttl) cache_default_ttl end @@ -251,7 +257,8 @@ def cache_pool_size return 0 unless cache_connected? Legion::Cache.pool_size - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_pool_size) 0 end @@ -259,7 +266,8 @@ def cache_pool_available return 0 unless cache_connected? Legion::Cache.available - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_pool_available) 0 end @@ -267,7 +275,8 @@ def local_cache_pool_size return 0 unless local_cache_connected? Legion::Cache::Local.pool_size - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :local_cache_pool_size) 0 end @@ -275,7 +284,8 @@ def local_cache_pool_available return 0 unless local_cache_connected? Legion::Cache::Local.available - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :local_cache_pool_available) 0 end @@ -328,7 +338,8 @@ def memcached_hash_load(full_key) parsed = Legion::JSON.load(raw) # Legion::JSON.load returns symbol keys; convert to string keys to mirror Redis hgetall parsed.transform_keys(&:to_s) - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :memcached_hash_load, key: full_key) nil end @@ -349,9 +360,7 @@ def raise_sorted_set_unsupported(method) end def log_cache_error(method, error) - return unless defined?(Legion::Logging) - - Legion::Logging.warn "[cache:helper] #{method} failed: #{error.class} — #{error.message}" + handle_exception(error, level: :warn, operation: method) end end end diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index 6654f39..7619aee 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -1,11 +1,14 @@ # frozen_string_literal: true +require 'legion/logging/helper' require 'legion/cache/settings' module Legion module Cache module Local class << self + include Legion::Logging::Helper + def setup(**) return if @connected @@ -14,19 +17,19 @@ def setup(**) driver_name = settings[:driver] || Legion::Cache::Settings.driver @driver = build_driver(driver_name) - @driver.client(**settings, **) + @driver.client(**settings, logger: log, **) @connected = true servers = Array(settings[:servers]).join(', ') - Legion::Logging.info "Legion::Cache::Local connected (#{driver_name}) to #{servers}" if defined?(Legion::Logging) + log.info "Legion::Cache::Local connected (#{driver_name}) to #{servers}" rescue StandardError => e - Legion::Logging.warn "Legion::Cache::Local setup failed: #{e.message}" if defined?(Legion::Logging) + handle_exception(e, level: :warn, handled: true, operation: :cache_local_setup, driver: driver_name) @connected = false end def shutdown return unless @connected - Legion::Logging.info 'Shutting down Legion::Cache::Local' if defined?(Legion::Logging) + log.info 'Shutting down Legion::Cache::Local' @driver&.close @driver = nil @connected = false @@ -38,32 +41,47 @@ def connected? def get(key) result = @driver.get(key) - Legion::Logging.debug "[cache:local] GET #{key} hit=#{!result.nil?}" if defined?(Legion::Logging) + log.debug "[cache:local] GET #{key} hit=#{!result.nil?}" result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :cache_local_get, key: key) + raise end def set(key, value, ttl = 180) result = @driver.set(key, value, ttl) - Legion::Logging.debug "[cache:local] SET #{key} ttl=#{ttl} success=#{result}" if defined?(Legion::Logging) + log.debug "[cache:local] SET #{key} ttl=#{ttl} success=#{result}" result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :cache_local_set, key: key, ttl: ttl) + raise end def fetch(key, ttl = nil) result = @driver.fetch(key, ttl) - Legion::Logging.debug "[cache:local] FETCH #{key} hit=#{!result.nil?}" if defined?(Legion::Logging) + log.debug "[cache:local] FETCH #{key} hit=#{!result.nil?}" result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :cache_local_fetch, key: key, ttl: ttl) + raise end def delete(key) result = @driver.delete(key) - Legion::Logging.debug "[cache:local] DELETE #{key} success=#{result}" if defined?(Legion::Logging) + log.debug "[cache:local] DELETE #{key} success=#{result}" result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :cache_local_delete, key: key) + raise end def flush(delay = 0) result = @driver.flush(delay) - Legion::Logging.debug '[cache:local] FLUSH completed' if defined?(Legion::Logging) + log.debug '[cache:local] FLUSH completed' result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :cache_local_flush, delay: delay) + raise end def client @@ -73,12 +91,16 @@ def client def close @driver&.close @connected = false + log.info 'Legion::Cache::Local pool closed' + @connected end def restart(**opts) settings = local_settings - @driver&.restart(**settings.merge(opts)) + @driver&.restart(**settings.merge(opts, logger: log)) @connected = true + log.info 'Legion::Cache::Local pool restarted' + @connected end def size @@ -100,6 +122,8 @@ def timeout def reset! @driver = nil @connected = false + log.debug 'Legion::Cache::Local state reset' + @connected end private diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 8e92add..d788bdb 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -2,6 +2,7 @@ require 'openssl' require 'dalli' +require 'legion/logging/helper' require 'legion/cache/pool' module Legion @@ -9,12 +10,14 @@ module Cache module Memcached include Legion::Cache::Pool extend self + extend Legion::Logging::Helper - def client(server: nil, servers: nil, **opts) + def client(server: nil, servers: nil, logger: nil, **opts) return @client unless @client.nil? settings = defined?(Legion::Settings) ? Legion::Settings[:cache] : {} servers ||= settings[:servers] || [] + @component_logger = logger || log @pool_size = opts.key?(:pool_size) ? opts[:pool_size] : settings[:pool_size] || 10 @timeout = opts.key?(:timeout) ? opts[:timeout] : settings[:timeout] || 5 @@ -23,7 +26,7 @@ def client(server: nil, servers: nil, **opts) driver: 'memcached', server: server, servers: Array(servers) ) - Dalli.logger = Legion::Logging + Dalli.logger = shared_dalli_logger cache_opts = settings.merge(opts) cache_opts[:value_max_bytes] ||= 8 * 1024 * 1024 cache_opts[:serializer] ||= Legion::JSON @@ -36,40 +39,74 @@ def client(server: nil, servers: nil, **opts) end @connected = true - Legion::Logging.info "Memcached connected to #{resolved.join(', ')}" if defined?(Legion::Logging) + cache_logger.info "Memcached connected to #{resolved.join(', ')}" @client + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :memcached_client, + server: server, servers: Array(servers)) + @connected = false + raise end def get(key) result = client.with { |conn| conn.get(key) } - Legion::Logging.debug "[cache] GET #{key} hit=#{!result.nil?}" + cache_logger.debug "[cache] GET #{key} hit=#{!result.nil?}" result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :memcached_get, key: key) + raise end def fetch(key, ttl = nil) result = client.with { |conn| conn.fetch(key, ttl) } - Legion::Logging.debug "[cache] FETCH #{key} hit=#{!result.nil?}" + cache_logger.debug "[cache] FETCH #{key} hit=#{!result.nil?}" result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :memcached_fetch, key: key, ttl: ttl) + raise end def set(key, value, ttl = 180) result = client.with { |conn| conn.set(key, value, ttl).positive? } - Legion::Logging.debug "[cache] SET #{key} ttl=#{ttl} success=#{result} value_class=#{value.class}" + cache_logger.debug "[cache] SET #{key} ttl=#{ttl} success=#{result} value_class=#{value.class}" result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :memcached_set, key: key, ttl: ttl) + raise end def delete(key) result = client.with { |conn| conn.delete(key) == true } - Legion::Logging.debug "[cache] DELETE #{key} success=#{result}" + cache_logger.debug "[cache] DELETE #{key} success=#{result}" result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :memcached_delete, key: key) + raise end def flush(delay = 0) - client.with { |conn| conn.flush(delay).first } + result = client.with { |conn| conn.flush(delay).first } + cache_logger.debug '[cache] FLUSH completed' + result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :memcached_flush, delay: delay) + raise end private + def cache_logger + @component_logger || log + end + + def shared_dalli_logger + if defined?(Legion::Cache) && Legion::Cache.respond_to?(:log) + Legion::Cache.log + else + cache_logger + end + end + def memcached_tls_context(port:) return nil unless defined?(Legion::Crypt::TLS) @@ -87,7 +124,7 @@ def memcached_tls_settings Legion::Settings[:cache][:tls] || {} rescue StandardError => e - Legion::Logging.debug("Memcached#memcached_tls_settings failed: #{e.message}") if defined?(Legion::Logging) + handle_exception(e, level: :warn, handled: true, operation: :memcached_tls_settings) {} end end diff --git a/lib/legion/cache/memory.rb b/lib/legion/cache/memory.rb index 3c48f75..0d44c55 100644 --- a/lib/legion/cache/memory.rb +++ b/lib/legion/cache/memory.rb @@ -1,9 +1,12 @@ # frozen_string_literal: true +require 'legion/logging/helper' + module Legion module Cache module Memory extend self + extend Legion::Logging::Helper @store = {} @expiry = {} @@ -12,6 +15,8 @@ module Memory def setup(**) @connected = true + log.info 'Legion::Cache::Memory connected' + @connected end def client(**) = self @@ -23,7 +28,9 @@ def connected? def get(key) @mutex.synchronize do expire_if_needed(key) - @store[key] + result = @store[key] + log.debug "[cache:memory] GET #{key} hit=#{!result.nil?}" + result end end @@ -31,6 +38,7 @@ def set(key, value, ttl = nil) @mutex.synchronize do @store[key] = value @expiry[key] = Time.now + ttl if ttl&.positive? + log.debug "[cache:memory] SET #{key} ttl=#{ttl.inspect}" value end end @@ -39,6 +47,7 @@ def fetch(key, ttl = nil) val = get(key) return val unless val.nil? + log.debug "[cache:memory] FETCH #{key} miss=true" val = yield if block_given? set(key, val, ttl) val @@ -46,16 +55,20 @@ def fetch(key, ttl = nil) def delete(key) @mutex.synchronize do - @store.delete(key) + removed = @store.delete(key) @expiry.delete(key) + log.debug "[cache:memory] DELETE #{key} success=#{!removed.nil?}" + removed end end def flush(_delay = 0) - @mutex.synchronize do + result = @mutex.synchronize do @store.clear @expiry.clear end + log.info 'Legion::Cache::Memory flushed' + result end def close = nil @@ -63,14 +76,18 @@ def close = nil def shutdown flush @connected = false + log.info 'Legion::Cache::Memory shut down' + @connected end def reset! - @mutex.synchronize do + result = @mutex.synchronize do @store.clear @expiry.clear @connected = false end + log.info 'Legion::Cache::Memory state reset' + result end def size = 1 @@ -83,6 +100,7 @@ def expire_if_needed(key) @store.delete(key) @expiry.delete(key) + log.debug "[cache:memory] EXPIRE #{key}" end end end diff --git a/lib/legion/cache/pool.rb b/lib/legion/cache/pool.rb index 548a571..016716a 100644 --- a/lib/legion/cache/pool.rb +++ b/lib/legion/cache/pool.rb @@ -1,11 +1,13 @@ # frozen_string_literal: true require 'connection_pool' +require 'legion/logging/helper' module Legion module Cache module Pool - extend self # rubocop:disable Style/ModuleFunction + extend self + extend Legion::Logging::Helper def connected? @connected ||= false @@ -31,7 +33,7 @@ def close client.shutdown(&:close) @client = nil @connected = false - Legion::Logging.info "#{name} pool closed" if defined?(Legion::Logging) + log.info "#{pool_log_name} pool closed" end def restart(**opts) @@ -42,7 +44,26 @@ def restart(**opts) client_hash[:timeout] = opts[:timeout] if opts.key? :timeout client(**client_hash) @connected = true - Legion::Logging.info "#{name} pool restarted" if defined?(Legion::Logging) + log.info "#{pool_log_name} pool restarted" + end + + private + + def pool_log_name + if respond_to?(:name) + label = name.to_s + return label unless label.empty? || label.start_with?('#<') + end + + segments = if instance_variable_defined?(:@component_logger) && @component_logger.respond_to?(:segments) + Array(@component_logger.segments) + elsif log.respond_to?(:segments) + Array(log.segments) + else + [] + end + + segments.empty? ? 'cache.pool' : segments.join('.') end end end diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index ae81c79..5eb1145 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -2,6 +2,7 @@ require 'openssl' require 'redis' +require 'legion/logging/helper' require 'legion/cache/pool' require 'legion/cache/settings' @@ -10,14 +11,17 @@ module Cache module Redis include Legion::Cache::Pool extend self + extend Legion::Logging::Helper def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, replica: false, # rubocop:disable Metrics/ParameterLists + logger: nil, fixed_hostname: nil, username: nil, password: nil, db: nil, reconnect_attempts: [0, 0.5, 1], **) return @client unless @client.nil? @pool_size = pool_size @timeout = timeout @cluster_mode = Array(cluster).compact.any? + @component_logger = logger || log @client = ConnectionPool.new(size: pool_size, timeout: timeout) do build_redis_client(server: server, servers: servers, cluster: cluster, @@ -26,8 +30,13 @@ def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, re reconnect_attempts: reconnect_attempts) end @connected = true - Legion::Logging.info "Redis connected to #{resolved_redis_address(server: server, servers: servers, cluster: cluster)}" if defined?(Legion::Logging) + cache_logger.info "Redis connected to #{resolved_redis_address(server: server, servers: servers, cluster: cluster)}" @client + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :redis_client, + server: server, servers: Array(servers), cluster_nodes: Array(cluster)) + @connected = false + raise end def build_redis_client(server: nil, servers: [], cluster: nil, replica: false, fixed_hostname: nil, # rubocop:disable Metrics/ParameterLists @@ -61,10 +70,10 @@ def cluster_mode? def get(key) result = client.with { |conn| conn.get(key) } - Legion::Logging.debug "[cache] GET #{key} hit=#{!result.nil?}" if defined?(Legion::Logging) + cache_logger.debug "[cache] GET #{key} hit=#{!result.nil?}" result rescue ::Redis::BaseError => e - log_cluster_error(e) + log_cluster_error('redis_get', e, key: key) raise end alias fetch get @@ -73,19 +82,19 @@ def set(key, value, ttl = nil) args = {} args[:ex] = ttl unless ttl.nil? result = client.with { |conn| conn.set(key, value, **args) == 'OK' } - Legion::Logging.debug "[cache] SET #{key} ttl=#{ttl.inspect} success=#{result}" if defined?(Legion::Logging) + cache_logger.debug "[cache] SET #{key} ttl=#{ttl.inspect} success=#{result}" result rescue ::Redis::BaseError => e - log_cluster_error(e) + log_cluster_error('redis_set', e, key: key, ttl: ttl) raise end def delete(key) result = client.with { |conn| conn.del(key) == 1 } - Legion::Logging.debug "[cache] DELETE #{key} success=#{result}" if defined?(Legion::Logging) + cache_logger.debug "[cache] DELETE #{key} success=#{result}" result rescue ::Redis::BaseError => e - log_cluster_error(e) + log_cluster_error('redis_delete', e, key: key) raise end @@ -97,10 +106,10 @@ def flush conn.flushdb == 'OK' end end - Legion::Logging.debug '[cache] FLUSH completed' if defined?(Legion::Logging) + cache_logger.debug '[cache] FLUSH completed' result rescue ::Redis::BaseError => e - log_cluster_error(e) + log_cluster_error('redis_flush', e) raise end @@ -116,10 +125,10 @@ def mget(*keys) keys.zip(values).to_h end end - Legion::Logging.debug "[cache] MGET keys=#{keys.size}" if defined?(Legion::Logging) + cache_logger.debug "[cache] MGET keys=#{keys.size}" result rescue ::Redis::BaseError => e - log_cluster_error(e) + log_cluster_error('redis_mget', e, key_count: keys.size) raise end @@ -133,15 +142,19 @@ def mset(hash) conn.mset(*hash.flatten) == 'OK' end end - Legion::Logging.debug "[cache] MSET keys=#{hash.size}" if defined?(Legion::Logging) + cache_logger.debug "[cache] MSET keys=#{hash.size}" result rescue ::Redis::BaseError => e - log_cluster_error(e) + log_cluster_error('redis_mset', e, key_count: hash.size) raise end private + def cache_logger + @component_logger || log + end + def cluster_mget(conn, keys) groups = group_keys_by_slot(keys) result = {} @@ -172,7 +185,7 @@ def cluster_flush(conn) end true rescue StandardError => e - Legion::Logging.warn("Redis#cluster_flush cluster node flush failed, falling back to single flushdb: #{e.message}") if defined?(Legion::Logging) + handle_exception(e, level: :warn, handled: true, operation: :cluster_flush, fallback: :single_flushdb) conn.flushdb == 'OK' end @@ -190,14 +203,12 @@ def resolved_redis_address(server:, servers:, cluster:) Legion::Cache::Settings.resolve_servers(driver: 'redis', server: server, servers: Array(servers)).first rescue StandardError => e - Legion::Logging.debug("Redis#resolved_redis_address failed: #{e.message}") if defined?(Legion::Logging) + handle_exception(e, level: :warn, handled: true, operation: :resolved_redis_address) 'unknown' end - def log_cluster_error(error) - return unless defined?(Legion::Logging) - - Legion::Logging.warn "Redis cluster error: #{error.class} — #{error.message}" + def log_cluster_error(operation, error, **) + handle_exception(error, level: :warn, handled: false, operation: operation, **) end def redis_tls_options(port:) @@ -219,7 +230,7 @@ def cache_tls_settings Legion::Settings[:cache][:tls] || {} rescue StandardError => e - Legion::Logging.debug("Redis#cache_tls_settings failed: #{e.message}") if defined?(Legion::Logging) + handle_exception(e, level: :warn, handled: true, operation: :cache_tls_settings) {} end end diff --git a/lib/legion/cache/redis_hash.rb b/lib/legion/cache/redis_hash.rb index 5941360..2c909b2 100644 --- a/lib/legion/cache/redis_hash.rb +++ b/lib/legion/cache/redis_hash.rb @@ -1,8 +1,12 @@ # frozen_string_literal: true +require 'legion/logging/helper' + module Legion module Cache module RedisHash + extend Legion::Logging::Helper + module_function # Returns true when the Redis driver is loaded and the connection pool is live. @@ -11,7 +15,8 @@ def redis_available? return false if pool.nil? Legion::Cache.connected? - rescue StandardError + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :redis_hash_available) false end @@ -24,6 +29,7 @@ def hset(key, hash) flat = hash.flat_map { |k, v| [k.to_s, v.to_s] } conn.hset(key, *flat) end + log.debug "[cache:redis_hash] HSET #{key} fields=#{hash.size}" true rescue StandardError => e log_redis_error('hset', e) @@ -34,9 +40,11 @@ def hset(key, hash) def hgetall(key) return nil unless redis_available? - Legion::Cache.instance_variable_get(:@client).with do |conn| + result = Legion::Cache.instance_variable_get(:@client).with do |conn| conn.hgetall(key) end + log.debug "[cache:redis_hash] HGETALL #{key} fields=#{result.size}" + result rescue StandardError => e log_redis_error('hgetall', e) nil @@ -46,9 +54,11 @@ def hgetall(key) def hdel(key, *fields) return 0 unless redis_available? - Legion::Cache.instance_variable_get(:@client).with do |conn| + result = Legion::Cache.instance_variable_get(:@client).with do |conn| conn.hdel(key, *fields) end + log.debug "[cache:redis_hash] HDEL #{key} fields=#{fields.size} removed=#{result}" + result rescue StandardError => e log_redis_error('hdel', e) 0 @@ -61,6 +71,7 @@ def zadd(key, score, member) Legion::Cache.instance_variable_get(:@client).with do |conn| conn.zadd(key, score.to_f, member.to_s) end + log.debug "[cache:redis_hash] ZADD #{key} member=#{member}" true rescue StandardError => e log_redis_error('zadd', e) @@ -75,9 +86,11 @@ def zrangebyscore(key, min, max, limit: nil) opts = {} opts[:limit] = limit if limit - Legion::Cache.instance_variable_get(:@client).with do |conn| + result = Legion::Cache.instance_variable_get(:@client).with do |conn| conn.zrangebyscore(key, min, max, **opts) end + log.debug "[cache:redis_hash] ZRANGEBYSCORE #{key} results=#{result.size}" + result rescue StandardError => e log_redis_error('zrangebyscore', e) [] @@ -90,6 +103,7 @@ def zrem(key, member) Legion::Cache.instance_variable_get(:@client).with do |conn| conn.zrem(key, member.to_s) end + log.debug "[cache:redis_hash] ZREM #{key} member=#{member}" true rescue StandardError => e log_redis_error('zrem', e) @@ -100,18 +114,18 @@ def zrem(key, member) def expire(key, seconds) return false unless redis_available? - Legion::Cache.instance_variable_get(:@client).with do |conn| + result = Legion::Cache.instance_variable_get(:@client).with do |conn| conn.expire(key, seconds.to_i) == 1 end + log.debug "[cache:redis_hash] EXPIRE #{key} seconds=#{seconds} success=#{result}" + result rescue StandardError => e log_redis_error('expire', e) false end def log_redis_error(method, error) - return unless defined?(Legion::Logging) - - Legion::Logging.warn "[cache:redis_hash] #{method} failed: #{error.class} — #{error.message}" + handle_exception(error, level: :warn, handled: true, operation: method) end end end diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 62062b0..f005816 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -1,16 +1,23 @@ # frozen_string_literal: true -begin - require 'legion/settings' -rescue StandardError => e - warn "legion-cache: failed to require legion/settings: #{e.message}" -end +require 'legion/logging/helper' module Legion module Cache module Settings - Legion::Settings.merge_settings(:cache, default) if Legion::Settings.method_defined? :merge_settings - Legion::Settings.merge_settings(:cache_local, local) if Legion::Settings.method_defined? :merge_settings + extend Legion::Logging::Helper + + begin + require 'legion/settings' + rescue StandardError => e + handle_exception(e, + level: :error, + handled: true, + operation: :cache_settings_require_legion_settings) + end + + Legion::Settings.merge_settings(:cache, default) if defined?(Legion::Settings) && Legion::Settings.method_defined?(:merge_settings) + Legion::Settings.merge_settings(:cache_local, local) if defined?(Legion::Settings) && Legion::Settings.method_defined?(:merge_settings) def self.default { driver: driver, @@ -70,7 +77,9 @@ def self.resolve_servers(driver:, server: nil, servers: [], port: nil) all = ["127.0.0.1:#{port}"] if all.empty? all.map! { |s| s.include?(':') ? s : "#{s}:#{port}" } - all.uniq + resolved = all.uniq + log.debug "Legion::Cache::Settings resolved driver=#{gem_driver} servers=#{resolved.join(', ')}" + resolved end def self.normalize_driver(name) @@ -84,11 +93,15 @@ def self.normalize_driver(name) def self.driver(prefer = 'dalli') secondary = prefer == 'dalli' ? 'redis' : 'dalli' if Gem::Specification.find_all_by_name(prefer).any? + log.debug "Legion::Cache::Settings selected driver=#{prefer}" prefer elsif Gem::Specification.find_all_by_name(secondary).any? + log.info "Legion::Cache::Settings falling back driver=#{secondary} preferred=#{prefer}" secondary else - raise NameError('Legion::Cache.driver is nil') + error = NameError.new('Legion::Cache.driver is nil') + handle_exception(error, level: :error, handled: false, operation: :cache_settings_driver, preferred: prefer) + raise error end end end From 4380b57ae966bdba8bb00bd4b7ea17f8797d8c99 Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 15:32:51 -0500 Subject: [PATCH 064/108] update logging uplift specs --- spec/legion/cache/helper_spec.rb | 27 +++++++++ spec/legion/cache/memcached_tls_spec.rb | 11 ++++ spec/legion/cache/redis_cluster_spec.rb | 80 +++++++++++++++++-------- 3 files changed, 93 insertions(+), 25 deletions(-) diff --git a/spec/legion/cache/helper_spec.rb b/spec/legion/cache/helper_spec.rb index 6dce1ca..4509493 100644 --- a/spec/legion/cache/helper_spec.rb +++ b/spec/legion/cache/helper_spec.rb @@ -55,6 +55,19 @@ def cache_default_ttl obj = custom_ttl_class.new expect(obj.cache_default_ttl).to eq(600) end + + it 'reports exceptions and falls back when settings lookup fails' do + allow(Legion::Settings).to receive(:dig).with(:cache, :default_ttl).and_raise(StandardError, 'boom') + allow(subject).to receive(:handle_exception) + + expect(subject.cache_default_ttl).to eq(60) + expect(subject).to have_received(:handle_exception).with( + an_instance_of(StandardError), + level: :warn, + handled: true, + operation: :cache_default_ttl + ) + end end describe '#local_cache_default_ttl' do @@ -67,6 +80,20 @@ def cache_default_ttl allow(Legion::Settings).to receive(:dig).with(:cache, :default_ttl).and_return(120) expect(subject.local_cache_default_ttl).to eq(120) end + + it 'reports exceptions and falls back to cache_default_ttl when local lookup fails' do + allow(Legion::Settings).to receive(:dig).with(:cache_local, :default_ttl).and_raise(StandardError, 'boom') + allow(subject).to receive(:handle_exception) + allow(subject).to receive(:cache_default_ttl).and_return(90) + + expect(subject.local_cache_default_ttl).to eq(90) + expect(subject).to have_received(:handle_exception).with( + an_instance_of(StandardError), + level: :warn, + handled: true, + operation: :local_cache_default_ttl + ) + end end describe '#cache_namespace' do diff --git a/spec/legion/cache/memcached_tls_spec.rb b/spec/legion/cache/memcached_tls_spec.rb index 59d6db2..a33a236 100644 --- a/spec/legion/cache/memcached_tls_spec.rb +++ b/spec/legion/cache/memcached_tls_spec.rb @@ -15,6 +15,17 @@ after { mc_mod.instance_variable_set(:@client, nil) } describe 'TLS options passed to Dalli::Client' do + it 'uses a shared cache logger for Dalli internals' do + allow(Legion::Crypt::TLS).to receive(:resolve).and_return( + { enabled: false, verify: :peer, ca: nil, cert: nil, key: nil, auto_detected: false } + ) + expect(Dalli).to receive(:logger=).with(an_instance_of(Legion::Logging::TaggedLogger)) + expect(Dalli::Client).to receive(:new).and_return(double(alive!: true)) + allow(ConnectionPool).to receive(:new).and_yield + + mc_mod.client + end + it 'passes ssl_context when TLS is enabled' do allow(Legion::Crypt::TLS).to receive(:resolve).and_return( { enabled: true, verify: :peer, ca: '/ca.crt', cert: nil, key: nil, auto_detected: false } diff --git a/spec/legion/cache/redis_cluster_spec.rb b/spec/legion/cache/redis_cluster_spec.rb index a7754aa..7570b58 100644 --- a/spec/legion/cache/redis_cluster_spec.rb +++ b/spec/legion/cache/redis_cluster_spec.rb @@ -213,7 +213,7 @@ end end - describe 'failover logging' do + describe 'exception handling' do let(:redis_conn) { instance_double(Redis) } let(:pool) { instance_double(ConnectionPool) } @@ -224,52 +224,82 @@ allow(pool).to receive(:with).and_yield(redis_conn) end - it 'logs warning on Redis::BaseError and re-raises from get' do + it 'routes get failures through handle_exception and re-raises' do allow(redis_conn).to receive(:get).and_raise(Redis::BaseError, 'node down') - allow(Legion::Logging).to receive(:warn) + allow(described_class).to receive(:handle_exception) expect { described_class.send(:get, 'key') }.to raise_error(Redis::BaseError) - expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*node down/) + expect(described_class).to have_received(:handle_exception).with( + an_instance_of(Redis::BaseError), + level: :warn, + handled: false, + operation: 'redis_get', + key: 'key' + ) end - it 'logs warning on Redis::BaseError and re-raises from set' do + it 'routes set failures through handle_exception and re-raises' do allow(redis_conn).to receive(:set).and_raise(Redis::BaseError, 'write failed') - allow(Legion::Logging).to receive(:warn) + allow(described_class).to receive(:handle_exception) expect { described_class.send(:set, 'key', 'val') }.to raise_error(Redis::BaseError) - expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*write failed/) + expect(described_class).to have_received(:handle_exception).with( + an_instance_of(Redis::BaseError), + level: :warn, + handled: false, + operation: 'redis_set', + key: 'key', + ttl: nil + ) end - it 'logs warning on Redis::BaseError and re-raises from delete' do + it 'routes delete failures through handle_exception and re-raises' do allow(redis_conn).to receive(:del).and_raise(Redis::BaseError, 'conn lost') - allow(Legion::Logging).to receive(:warn) + allow(described_class).to receive(:handle_exception) expect { described_class.send(:delete, 'key') }.to raise_error(Redis::BaseError) - expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*conn lost/) + expect(described_class).to have_received(:handle_exception).with( + an_instance_of(Redis::BaseError), + level: :warn, + handled: false, + operation: 'redis_delete', + key: 'key' + ) end - it 'logs warning on Redis::BaseError and re-raises from mget' do + it 'routes mget failures through handle_exception and re-raises' do allow(redis_conn).to receive(:mget).and_raise(Redis::BaseError, 'cluster fail') - allow(Legion::Logging).to receive(:warn) + allow(described_class).to receive(:handle_exception) expect { described_class.mget('a') }.to raise_error(Redis::BaseError) - expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*cluster fail/) + expect(described_class).to have_received(:handle_exception).with( + an_instance_of(Redis::BaseError), + level: :warn, + handled: false, + operation: 'redis_mget', + key_count: 1 + ) end - it 'logs warning on Redis::BaseError and re-raises from mset' do + it 'routes mset failures through handle_exception and re-raises' do allow(redis_conn).to receive(:mset).and_raise(Redis::BaseError, 'cluster fail') - allow(Legion::Logging).to receive(:warn) + allow(described_class).to receive(:handle_exception) expect { described_class.mset({ 'a' => '1' }) }.to raise_error(Redis::BaseError) - expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*cluster fail/) + expect(described_class).to have_received(:handle_exception).with( + an_instance_of(Redis::BaseError), + level: :warn, + handled: false, + operation: 'redis_mset', + key_count: 1 + ) end - it 'does not call logging when Legion::Logging is not defined' do - hide_const('Legion::Logging') - allow(redis_conn).to receive(:get).and_raise(Redis::BaseError, 'test') - expect { described_class.send(:get, 'key') }.to raise_error(Redis::BaseError) - end - - it 'logs warning on Redis::BaseError and re-raises from flush' do + it 'routes flush failures through handle_exception and re-raises' do allow(redis_conn).to receive(:flushdb).and_raise(Redis::BaseError, 'flush fail') - allow(Legion::Logging).to receive(:warn) + allow(described_class).to receive(:handle_exception) expect { described_class.flush }.to raise_error(Redis::BaseError) - expect(Legion::Logging).to have_received(:warn).with(/Redis cluster error.*flush fail/) + expect(described_class).to have_received(:handle_exception).with( + an_instance_of(Redis::BaseError), + level: :warn, + handled: false, + operation: 'redis_flush' + ) end end From e35e8d2677ab60aeb99eb553f8c0ed4bc2462db6 Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 15:33:20 -0500 Subject: [PATCH 065/108] bump version to 1.3.21 --- CHANGELOG.md | 7 +++++++ lib/legion/cache/version.rb | 2 +- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 3edf4dc..eb60206 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,13 @@ ## [Unreleased] +## [1.3.21] - 2026-04-02 + +### Changed +- Uplift cache logging internals to `Legion::Logging::Helper`, replacing direct logger calls with helper-provided `log` usage across cache runtime modules +- Route rescued cache adapter/helper/setup failures through `handle_exception` and expand runtime `info`/`debug`/`error` coverage for shared, local, memory, pool, and RedisHash flows +- Require `legion-logging >= 1.4.3` at runtime so helper exception handling is always available + ## [1.3.20] - 2026-03-31 ### Fixed diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 40eeb27..fa9c472 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.20' + VERSION = '1.3.21' end end From 4025a375fb3dcfd1caa09d890cb529e8cf4ec926 Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 15:53:26 -0500 Subject: [PATCH 066/108] fix cache backend runtime selection --- lib/legion/cache.rb | 194 +++++++++++++++++++++++++++++++-- lib/legion/cache/cacheable.rb | 15 ++- lib/legion/cache/helper.rb | 31 ++---- lib/legion/cache/local.rb | 13 ++- lib/legion/cache/memcached.rb | 10 +- lib/legion/cache/memory.rb | 6 +- lib/legion/cache/redis.rb | 14 ++- lib/legion/cache/redis_hash.rb | 1 + lib/legion/cache/settings.rb | 48 +++++++- 9 files changed, 284 insertions(+), 48 deletions(-) diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 33a1adb..5920767 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -16,15 +16,20 @@ module Legion module Cache extend Legion::Logging::Helper - if Legion::Cache::Settings.normalize_driver(Legion::Settings[:cache][:driver]) == 'redis' - extend Legion::Cache::Redis - else - extend Legion::Cache::Memcached - end - class << self include Legion::Logging::Helper + def connected? + @connected == true + end + + def driver_name + return 'memory' if @using_memory + return 'local' if @using_local + + @active_shared_driver || configured_shared_driver + end + def setup(**) return Legion::Settings[:cache][:connected] = true if connected? @@ -64,10 +69,39 @@ def using_local? @using_local == true end + def using_memory? + @using_memory == true + end + + def client(**opts) + if ENV['LEGION_MODE'] == 'lite' + Legion::Cache::Memory.setup unless Legion::Cache::Memory.connected? + @using_memory = true + @using_local = false + @connected = true + @active_shared_driver = nil + Legion::Settings[:cache][:connected] = true if defined?(Legion::Settings) + return Legion::Cache::Memory.client + end + + configure_shared_adapter!(opts[:driver]) + @using_memory = false + @using_local = false + result = super + @connected = true + Legion::Settings[:cache][:connected] = true if defined?(Legion::Settings) + result + rescue StandardError + @connected = false + Legion::Settings[:cache][:connected] = false if defined?(Legion::Settings) + raise + end + def get(key) return Legion::Cache::Memory.get(key) if @using_memory return Legion::Cache::Local.get(key) if @using_local + configure_shared_adapter! super end @@ -93,13 +127,15 @@ def set(key, value, ttl = nil, **opts) return Legion::Cache::Memory.set(key, value, effective_ttl) if @using_memory return Legion::Cache::Local.set(key, value, effective_ttl) if @using_local + configure_shared_adapter! super(key, value, effective_ttl) end - def fetch(key, ttl = nil) - return Legion::Cache::Memory.fetch(key, ttl) if @using_memory - return Legion::Cache::Local.fetch(key, ttl) if @using_local + def fetch(key, ttl = nil, &) + return Legion::Cache::Memory.fetch(key, ttl, &) if @using_memory + return Legion::Cache::Local.fetch(key, ttl, &) if @using_local + configure_shared_adapter! super end @@ -107,6 +143,7 @@ def delete(key) return Legion::Cache::Memory.delete(key) if @using_memory return Legion::Cache::Local.delete(key) if @using_local + configure_shared_adapter! super end @@ -114,6 +151,94 @@ def flush(delay = 0) return Legion::Cache::Memory.flush(delay) if @using_memory return Legion::Cache::Local.flush(delay) if @using_local + configure_shared_adapter! + super + end + + def mget(*keys) + keys = keys.flatten + return {} if keys.empty? + return keys.to_h { |key| [key, Legion::Cache::Memory.get(key)] } if @using_memory + return local_mget(*keys) if @using_local + + configure_shared_adapter! + super + end + + def mset(hash) + return true if hash.empty? + return hash.each { |key, value| Legion::Cache::Memory.set(key, value) } && true if @using_memory + return local_mset(hash) if @using_local + + configure_shared_adapter! + super + end + + def close + if @using_memory + Legion::Cache::Memory.shutdown + @using_memory = false + @connected = false + Legion::Settings[:cache][:connected] = false if defined?(Legion::Settings) + return false + end + + if @using_local + Legion::Cache::Local.close + @using_local = false + @connected = false + Legion::Settings[:cache][:connected] = false if defined?(Legion::Settings) + return false + end + + return false unless instance_variable_defined?(:@client) && @client + + configure_shared_adapter! + result = super + @connected = false + Legion::Settings[:cache][:connected] = false if defined?(Legion::Settings) + result + end + + def restart(**opts) + configure_shared_adapter!(opts[:driver]) + @using_memory = false + @using_local = false + result = super + @connected = true + Legion::Settings[:cache][:connected] = true if defined?(Legion::Settings) + result + end + + def size + return Legion::Cache::Memory.size if @using_memory + return Legion::Cache::Local.size if @using_local + + configure_shared_adapter! + super + end + + def available + return Legion::Cache::Memory.available if @using_memory + return Legion::Cache::Local.available if @using_local + + configure_shared_adapter! + super + end + + def pool_size + return Legion::Cache::Memory.size if @using_memory + return Legion::Cache::Local.pool_size if @using_local + + configure_shared_adapter! + super + end + + def timeout + return 0 if @using_memory + return Legion::Cache::Local.timeout if @using_local + + configure_shared_adapter! super end @@ -152,6 +277,57 @@ def setup_shared(**) def report_exception(exception, level:, handled:, **) handle_exception(exception, level: level, handled: handled, **) end + + def configure_shared_adapter!(requested_driver = nil) + driver = Legion::Cache::Settings.normalize_driver(requested_driver || configured_shared_driver) + return if @active_shared_driver == driver + + close_existing_shared_client + extend build_shared_adapter(driver) + + @active_shared_driver = driver + log.info "Legion::Cache selected shared adapter=#{driver}" + end + + def configured_shared_driver + if defined?(Legion::Settings) + Legion::Cache::Settings.normalize_driver(Legion::Settings.dig(:cache, :driver) || Legion::Cache::Settings.driver) + else + Legion::Cache::Settings.driver + end + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_configured_shared_driver) + 'dalli' + end + + def build_shared_adapter(driver) + case Legion::Cache::Settings.normalize_driver(driver) + when 'redis' + Legion::Cache::Redis.dup + else + Legion::Cache::Memcached.dup + end + end + + def close_existing_shared_client + return unless instance_variable_defined?(:@client) && @client + + @client.shutdown(&:close) + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_close_existing_shared_client) + ensure + @client = nil + @connected = false + end + + def local_mget(*keys) + keys.to_h { |key| [key, Legion::Cache::Local.get(key)] } + end + + def local_mset(hash) + hash.each { |key, value| Legion::Cache::Local.set(key, value) } + true + end end end end diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index b02a94b..e9eaef4 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -8,6 +8,8 @@ module Cache module Cacheable extend Legion::Logging::Helper + LOCAL_CACHE_MISS = Object.new + def self.extended(base) base.instance_variable_set(:@cached_methods, {}) end @@ -61,7 +63,8 @@ def self.cache_read(key, scope:) memory_read(key) else - local_cache_read(key) || memory_read(key) + result = local_cache_read(key) + result.equal?(LOCAL_CACHE_MISS) ? memory_read(key) : result end end @@ -75,7 +78,8 @@ def self.cache_write(key, value, ttl:, scope:) end else if local_cache_available? - local_cache_write(key, value, ttl) + result = local_cache_write(key, value, ttl) + memory_write(key, value, ttl) unless result else memory_write(key, value, ttl) end @@ -91,12 +95,13 @@ def self.local_cache_available? end def self.local_cache_read(key) - return nil unless local_cache_available? + return LOCAL_CACHE_MISS unless local_cache_available? - Legion::Cache::Local.get(key) + result = Legion::Cache::Local.get(key) + result.nil? ? LOCAL_CACHE_MISS : result rescue StandardError => e handle_exception(e, level: :warn, operation: :local_cache_read, key: key) - nil + LOCAL_CACHE_MISS end def self.local_cache_write(key, value, ttl) diff --git a/lib/legion/cache/helper.rb b/lib/legion/cache/helper.rb index 502b3da..e3da681 100644 --- a/lib/legion/cache/helper.rb +++ b/lib/legion/cache/helper.rb @@ -90,13 +90,8 @@ def cache_mset(hash, ttl: nil) effective_ttl = ttl || cache_default_ttl - if cache_redis? - namespaced = hash.transform_keys { |k| cache_namespace + k } - Legion::Cache.mset(namespaced) - else - hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, effective_ttl) } - true - end + hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, effective_ttl) } + true rescue StandardError => e log_cache_error('cache_mset', e) false @@ -108,13 +103,7 @@ def local_cache_mget(*keys) keys = keys.flatten return {} if keys.empty? - if local_cache_redis? - namespaced = keys.map { |k| cache_namespace + k } - raw = Legion::Cache::Local.mget(*namespaced) - keys.to_h { |k| [k, raw[cache_namespace + k]] } - else - keys.to_h { |k| [k, Legion::Cache::Local.get(cache_namespace + k)] } - end + keys.to_h { |k| [k, Legion::Cache::Local.get(cache_namespace + k)] } rescue StandardError => e log_cache_error('local_cache_mget', e) {} @@ -125,13 +114,8 @@ def local_cache_mset(hash, ttl: nil) effective_ttl = ttl || local_cache_default_ttl - if local_cache_redis? - namespaced = hash.transform_keys { |k| cache_namespace + k } - Legion::Cache::Local.mset(namespaced) - else - hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, effective_ttl) } - true - end + hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, effective_ttl) } + true rescue StandardError => e log_cache_error('local_cache_mset', e) false @@ -320,8 +304,9 @@ def cache_redis? def local_cache_redis? defined?(Legion::Cache::Local) && - Legion::Cache::Local.respond_to?(:mget) && - Legion::Cache::Local.connected? + Legion::Cache::Local.connected? && + Legion::Cache::Local.respond_to?(:driver_name) && + Legion::Cache::Local.driver_name == 'redis' end def memcached_hash_merge(full_key, new_fields) diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index 7619aee..390f5ce 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -16,6 +16,7 @@ def setup(**) return unless settings[:enabled] driver_name = settings[:driver] || Legion::Cache::Settings.driver + @driver_name = Legion::Cache::Settings.normalize_driver(driver_name) @driver = build_driver(driver_name) @driver.client(**settings, logger: log, **) @connected = true @@ -32,6 +33,7 @@ def shutdown log.info 'Shutting down Legion::Cache::Local' @driver&.close @driver = nil + @driver_name = nil @connected = false end @@ -39,6 +41,10 @@ def connected? @connected == true end + def driver_name + @driver_name || Legion::Cache::Settings.normalize_driver(local_settings[:driver] || Legion::Cache::Settings.driver) + end + def get(key) result = @driver.get(key) log.debug "[cache:local] GET #{key} hit=#{!result.nil?}" @@ -57,8 +63,8 @@ def set(key, value, ttl = 180) raise end - def fetch(key, ttl = nil) - result = @driver.fetch(key, ttl) + def fetch(key, ttl = nil, &) + result = @driver.fetch(key, ttl, &) log.debug "[cache:local] FETCH #{key} hit=#{!result.nil?}" result rescue StandardError => e @@ -90,6 +96,8 @@ def client def close @driver&.close + @driver = nil + @driver_name = nil @connected = false log.info 'Legion::Cache::Local pool closed' @connected @@ -121,6 +129,7 @@ def timeout def reset! @driver = nil + @driver_name = nil @connected = false log.debug 'Legion::Cache::Local state reset' @connected diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index d788bdb..5278873 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -57,8 +57,14 @@ def get(key) raise end - def fetch(key, ttl = nil) - result = client.with { |conn| conn.fetch(key, ttl) } + def fetch(key, ttl = nil, &) + result = client.with do |conn| + if block_given? + conn.fetch(key, ttl, &) + else + conn.fetch(key, ttl) + end + end cache_logger.debug "[cache] FETCH #{key} hit=#{!result.nil?}" result rescue StandardError => e diff --git a/lib/legion/cache/memory.rb b/lib/legion/cache/memory.rb index 0d44c55..3058786 100644 --- a/lib/legion/cache/memory.rb +++ b/lib/legion/cache/memory.rb @@ -37,7 +37,11 @@ def get(key) def set(key, value, ttl = nil) @mutex.synchronize do @store[key] = value - @expiry[key] = Time.now + ttl if ttl&.positive? + if ttl&.positive? + @expiry[key] = Time.now + ttl + else + @expiry.delete(key) + end log.debug "[cache:memory] SET #{key} ttl=#{ttl.inspect}" value end diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 5eb1145..108f756 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -53,7 +53,7 @@ def build_redis_client(server: nil, servers: [], cluster: nil, replica: false, f resolved = Legion::Cache::Settings.resolve_servers( driver: 'redis', server: server, servers: servers ) - host, port = resolved.first.split(':') + host, port = Legion::Cache::Settings.parse_server_address(resolved.first, default_port: 6379) redis_opts = { host: host, port: port.to_i, reconnect_attempts: reconnect_attempts, timeout: @timeout } redis_opts[:username] = username unless username.nil? @@ -76,7 +76,15 @@ def get(key) log_cluster_error('redis_get', e, key: key) raise end - alias fetch get + + def fetch(key, ttl = nil) + result = get(key) + return result unless result.nil? && block_given? + + result = yield + set(key, result, ttl) + result + end def set(key, value, ttl = nil) args = {} @@ -178,7 +186,7 @@ def cluster_flush(conn) node_info = conn.cluster('nodes') primaries = node_info.lines.select { |l| l.include?('master') }.map { |l| l.split[1].split('@').first } primaries.each do |addr| - host, port = addr.split(':') + host, port = Legion::Cache::Settings.parse_server_address(addr, default_port: 6379) node = ::Redis.new(host: host, port: port.to_i) node.flushdb node.close diff --git a/lib/legion/cache/redis_hash.rb b/lib/legion/cache/redis_hash.rb index 2c909b2..747d41a 100644 --- a/lib/legion/cache/redis_hash.rb +++ b/lib/legion/cache/redis_hash.rb @@ -13,6 +13,7 @@ module RedisHash def redis_available? pool = Legion::Cache.instance_variable_get(:@client) return false if pool.nil? + return false unless Legion::Cache.respond_to?(:driver_name) && Legion::Cache.driver_name == 'redis' Legion::Cache.connected? rescue StandardError => e diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index f005816..285f0a9 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -1,5 +1,6 @@ # frozen_string_literal: true +require 'ipaddr' require 'legion/logging/helper' module Legion @@ -16,8 +17,6 @@ module Settings operation: :cache_settings_require_legion_settings) end - Legion::Settings.merge_settings(:cache, default) if defined?(Legion::Settings) && Legion::Settings.method_defined?(:merge_settings) - Legion::Settings.merge_settings(:cache_local, local) if defined?(Legion::Settings) && Legion::Settings.method_defined?(:merge_settings) def self.default { driver: driver, @@ -76,12 +75,36 @@ def self.resolve_servers(driver:, server: nil, servers: [], port: nil) all = Array(servers) + Array(server) all = ["127.0.0.1:#{port}"] if all.empty? - all.map! { |s| s.include?(':') ? s : "#{s}:#{port}" } + all.map! { |s| normalize_server(s, port: port) } resolved = all.uniq log.debug "Legion::Cache::Settings resolved driver=#{gem_driver} servers=#{resolved.join(', ')}" resolved end + def self.parse_server_address(server, default_port:) + raw = server.to_s.strip + return ['127.0.0.1', default_port] if raw.empty? + + bracketed = raw.match(/\A\[(?[^\]]+)\](?::(?\d+))?\z/) + return [bracketed[:host], (bracketed[:port] || default_port).to_i] if bracketed + + return [raw, default_port] if ipv6_literal?(raw) + + host, explicit_port = raw.split(':', 2) + if explicit_port&.match?(/\A\d+\z/) + [host, explicit_port.to_i] + else + [raw, default_port] + end + end + + def self.register_defaults! + return unless defined?(Legion::Settings) && Legion::Settings.respond_to?(:merge_settings) + + Legion::Settings.merge_settings(:cache, default) + Legion::Settings.merge_settings(:cache_local, local) + end + def self.normalize_driver(name) case name.to_s when 'redis' then 'redis' @@ -104,6 +127,25 @@ def self.driver(prefer = 'dalli') raise error end end + + def self.normalize_server(server, port:) + host, resolved_port = parse_server_address(server, default_port: port) + format_server(host, resolved_port) + end + + def self.format_server(host, port) + return "[#{host}]:#{port}" if ipv6_literal?(host) + + "#{host}:#{port}" + end + + def self.ipv6_literal?(value) + IPAddr.new(value).ipv6? + rescue IPAddr::InvalidAddressError + false + end + + register_defaults! end end end From 1a644d63c0f4707dfda4fcdd4e4fd5e429156dab Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 15:54:18 -0500 Subject: [PATCH 067/108] add cache regression coverage --- spec/legion/cache/helper_spec.rb | 25 +++--- spec/legion/cache/memory_spec.rb | 8 ++ spec/legion/cache/redis_cluster_spec.rb | 27 ++++++ spec/legion/cache/redis_hash_spec.rb | 17 +++- spec/legion/cache_spec.rb | 107 ++++++++++++------------ spec/legion/cacheable_spec.rb | 32 +++++++ spec/legion/settings_spec.rb | 26 ++++++ 7 files changed, 179 insertions(+), 63 deletions(-) diff --git a/spec/legion/cache/helper_spec.rb b/spec/legion/cache/helper_spec.rb index 4509493..32f4288 100644 --- a/spec/legion/cache/helper_spec.rb +++ b/spec/legion/cache/helper_spec.rb @@ -339,18 +339,24 @@ def cache_default_ttl context 'with Redis backend' do before { allow(subject).to receive(:cache_redis?).and_return(true) } - it 'delegates to Legion::Cache.mset with namespaced keys' do - expect(Legion::Cache).to receive(:mset).with({ 'microsoft_teams:a' => 'v1', 'microsoft_teams:b' => 'v2' }) + it 'preserves TTL semantics via sequential set calls' do + expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', 60) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', 60) subject.cache_mset({ ':a' => 'v1', ':b' => 'v2' }) end - it 'returns true for empty hash without calling mset' do - expect(Legion::Cache).not_to receive(:mset) + it 'uses explicit TTL when provided' do + expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', 300) + subject.cache_mset({ ':k' => 'val' }, ttl: 300) + end + + it 'returns true for empty hash without calling set' do + expect(Legion::Cache).not_to receive(:set) expect(subject.cache_mset({})).to be true end it 'returns false on error' do - allow(Legion::Cache).to receive(:mset).and_raise(StandardError, 'fail') + allow(Legion::Cache).to receive(:set).and_raise(StandardError, 'fail') expect(subject.cache_mset({ ':x' => 'v' })).to be false end end @@ -380,11 +386,10 @@ def cache_default_ttl context 'with Redis local backend' do before do allow(subject).to receive(:local_cache_redis?).and_return(true) - allow(Legion::Cache::Local).to receive(:mget).with('microsoft_teams:a') - .and_return({ 'microsoft_teams:a' => 'lv1' }) + allow(Legion::Cache::Local).to receive(:get).with('microsoft_teams:a').and_return('lv1') end - it 'delegates to Legion::Cache::Local.mget and un-namespaces keys' do + it 'uses sequential local gets and un-namespaces keys' do expect(subject.local_cache_mget(':a')).to eq({ ':a' => 'lv1' }) end end @@ -407,8 +412,8 @@ def cache_default_ttl context 'with Redis local backend' do before { allow(subject).to receive(:local_cache_redis?).and_return(true) } - it 'delegates to Legion::Cache::Local.mset with namespaced keys' do - expect(Legion::Cache::Local).to receive(:mset).with({ 'microsoft_teams:k' => 'v' }) + it 'preserves TTL semantics via sequential local set calls' do + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', 60) subject.local_cache_mset({ ':k' => 'v' }) end end diff --git a/spec/legion/cache/memory_spec.rb b/spec/legion/cache/memory_spec.rb index 090d3b8..8074bcb 100644 --- a/spec/legion/cache/memory_spec.rb +++ b/spec/legion/cache/memory_spec.rb @@ -21,6 +21,14 @@ sleep 0.15 expect(described_class.get('expire-me')).to be_nil end + + it 'clears stale expiry when a key is rewritten without TTL' do + described_class.set('refresh-me', 'old', 0.05) + described_class.set('refresh-me', 'new') + sleep 0.06 + + expect(described_class.get('refresh-me')).to eq('new') + end end describe '.delete' do diff --git a/spec/legion/cache/redis_cluster_spec.rb b/spec/legion/cache/redis_cluster_spec.rb index 7570b58..7948fc5 100644 --- a/spec/legion/cache/redis_cluster_spec.rb +++ b/spec/legion/cache/redis_cluster_spec.rb @@ -74,6 +74,15 @@ result = described_class.build_redis_client(cluster: [nil, nil]) expect(result).to eq redis_instance end + + it 'parses bracketed IPv6 hosts for standalone connections' do + redis_instance = instance_double(Redis) + allow(Legion::Cache::Settings).to receive(:resolve_servers).and_return(['[::1]:6379']) + allow(Redis).to receive(:new).with(hash_including(host: '::1', port: 6379)).and_return(redis_instance) + + result = described_class.build_redis_client(cluster: nil) + expect(result).to eq redis_instance + end end describe '#cluster_mode?' do @@ -161,6 +170,24 @@ end end + describe '#fetch' do + it 'returns the existing value without writing' do + allow(described_class).to receive(:get).with('fetch-key').and_return('cached') + expect(described_class).not_to receive(:set) + fetch_block = proc { 'computed' } + + expect(described_class.fetch('fetch-key', 60, &fetch_block)).to eq('cached') + end + + it 'stores and returns the computed value on miss' do + allow(described_class).to receive(:get).with('fetch-key').and_return(nil) + expect(described_class).to receive(:set).with('fetch-key', 'computed', 60).and_return(true) + fetch_block = proc { 'computed' } + + expect(described_class.fetch('fetch-key', 60, &fetch_block)).to eq('computed') + end + end + describe '#mset' do let(:redis_conn) { instance_double(Redis) } let(:pool) { instance_double(ConnectionPool) } diff --git a/spec/legion/cache/redis_hash_spec.rb b/spec/legion/cache/redis_hash_spec.rb index a751805..8e2b173 100644 --- a/spec/legion/cache/redis_hash_spec.rb +++ b/spec/legion/cache/redis_hash_spec.rb @@ -20,6 +20,7 @@ pool = double('ConnectionPool') allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) allow(Legion::Cache).to receive(:connected?).and_return(false) + allow(Legion::Cache).to receive(:driver_name).and_return('redis') end it 'returns false' do @@ -27,11 +28,12 @@ end end - context 'when the cache is connected' do + context 'when the cache is connected on Redis' do before do pool = double('ConnectionPool') allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) allow(Legion::Cache).to receive(:connected?).and_return(true) + allow(Legion::Cache).to receive(:driver_name).and_return('redis') end it 'returns true' do @@ -39,6 +41,19 @@ end end + context 'when the cache is connected on Memcached' do + before do + pool = double('ConnectionPool') + allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(Legion::Cache).to receive(:connected?).and_return(true) + allow(Legion::Cache).to receive(:driver_name).and_return('dalli') + end + + it 'returns false' do + expect(mod.redis_available?).to be false + end + end + context 'when an exception is raised' do before { allow(Legion::Cache).to receive(:instance_variable_get).and_raise(RuntimeError, 'boom') } diff --git a/spec/legion/cache_spec.rb b/spec/legion/cache_spec.rb index e4802c5..01a44b1 100644 --- a/spec/legion/cache_spec.rb +++ b/spec/legion/cache_spec.rb @@ -1,72 +1,75 @@ # frozen_string_literal: true +require 'spec_helper' require 'legion/cache' RSpec.describe Legion::Cache do - it 'has a version number' do - expect(Legion::Cache::VERSION).not_to be nil + before do + ENV.delete('LEGION_MODE') + Legion::Settings[:cache][:driver] = 'dalli' + Legion::Settings[:cache][:servers] = ['127.0.0.1:11211'] + described_class.instance_variable_set(:@client, nil) + described_class.instance_variable_set(:@connected, false) + described_class.instance_variable_set(:@using_local, false) + described_class.instance_variable_set(:@using_memory, false) + described_class.instance_variable_set(:@active_shared_driver, nil) + Legion::Cache::Local.reset! + Legion::Cache::Memory.reset! end - it 'can setup' do - expect { Legion::Cache.client }.not_to raise_exception - expect(Legion::Cache.connected?).to eq true + after do + ENV.delete('LEGION_MODE') + Legion::Settings[:cache][:driver] = 'dalli' + Legion::Settings[:cache][:servers] = ['127.0.0.1:11211'] + described_class.instance_variable_set(:@client, nil) + described_class.instance_variable_set(:@connected, false) + described_class.instance_variable_set(:@using_local, false) + described_class.instance_variable_set(:@using_memory, false) + described_class.instance_variable_set(:@active_shared_driver, nil) end - it 'can set' do - expect(Legion::Cache).to respond_to :set - expect(Legion::Cache.set('test', 'foobar')).to eq true - expect(Legion::Cache.set('test_ttl', 'ttl_value', 10)).to eq true + it 'has a version number' do + expect(Legion::Cache::VERSION).not_to be_nil end - it 'can get' do - expect(Legion::Cache).to respond_to :get - expect(Legion::Cache.get('test')).to eq 'foobar' - expect(Legion::Cache.get('nil')).to eq nil - end + describe '.setup' do + it 'selects the shared adapter from settings at setup time' do + Legion::Settings[:cache][:driver] = 'redis' + Legion::Settings[:cache][:servers] = ['127.0.0.1:6379'] + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:setup) - it 'can delete' do - expect(Legion::Cache).to respond_to :delete - expect(Legion::Cache.delete('test')).to eq true - expect(Legion::Cache.delete('test_nil')).to eq false + expect { described_class.setup }.not_to raise_error + expect(described_class.driver_name).to eq('redis') + expect(described_class.connected?).to be(true) + end end - it 'can flush' do - expect(Legion::Cache).to respond_to :flush - expect(Legion::Cache.flush).to eq true - end + describe '.fetch' do + it 'forwards blocks to the memory adapter' do + described_class.instance_variable_set(:@using_memory, true) + fetch_block = proc { 'computed' } - it 'can get size and available counts' do - expect(Legion::Cache.size).to eq 10 - expect(Legion::Cache.available).to eq 10 - end + expect(Legion::Cache::Memory).to receive(:fetch) do |key, ttl, &block| + expect(key).to eq('cache.key') + expect(ttl).to eq(60) + block.call + end.and_return('computed') - it 'can shutdown' do - Legion::Cache.client - expect { Legion::Cache.shutdown }.not_to raise_exception - expect(Legion::Cache.connected?).to eq false - end + expect(described_class.fetch('cache.key', 60, &fetch_block)).to eq('computed') + end - it 'can restart with new values' do - Legion::Cache.client - expect(Legion::Cache.connected?).to eq true - expect(Legion::Cache.available).to eq 10 - expect(Legion::Cache.timeout).to eq 5 - expect { Legion::Cache.restart(pool_size: 2, timeout: 2) }.not_to raise_exception - expect(Legion::Cache.available).to eq 2 - expect(Legion::Cache.timeout).to eq 2 - expect(Legion::Cache.connected?).to eq true - expect(Legion::Cache.set('test_ttl_restart', 'ttl_value_restart', 10)).to eq true - expect(Legion::Cache.get('test_ttl_restart')).to eq 'ttl_value_restart' - end + it 'forwards blocks to the local adapter' do + described_class.instance_variable_set(:@using_local, true) + fetch_block = proc { 'local-computed' } + + expect(Legion::Cache::Local).to receive(:fetch) do |key, ttl, &block| + expect(key).to eq('cache.key') + expect(ttl).to eq(90) + block.call + end.and_return('local-computed') - it 'can setup' do - expect { Legion::Cache.setup }.not_to raise_exception - expect(Legion::Cache.connected?).to eq true - expect { Legion::Cache.setup }.not_to raise_exception - expect(Legion::Cache.connected?).to eq true - expect { Legion::Cache.close }.not_to raise_exception - expect(Legion::Cache.connected?).to eq false - expect { Legion::Cache.setup }.not_to raise_exception - expect(Legion::Cache.connected?).to eq true + expect(described_class.fetch('cache.key', 90, &fetch_block)).to eq('local-computed') + end end end diff --git a/spec/legion/cacheable_spec.rb b/spec/legion/cacheable_spec.rb index f8626e2..c3b2ccc 100644 --- a/spec/legion/cacheable_spec.rb +++ b/spec/legion/cacheable_spec.rb @@ -103,10 +103,31 @@ expect(described_class.cache_read('local.miss', scope: :local)).to eq('fallback') end + it 'preserves cached false values from Local' do + allow(Legion::Cache::Local).to receive(:get).with('local.false').and_return(false) + described_class.memory_write('local.false', 'fallback', 60) + + expect(described_class.cache_read('local.false', scope: :local)).to be(false) + end + + it 'falls back to memory when Local reads raise' do + allow(Legion::Cache::Local).to receive(:get).with('local.error').and_raise(StandardError, 'boom') + described_class.memory_write('local.error', 'fallback', 60) + + expect(described_class.cache_read('local.error', scope: :local)).to eq('fallback') + end + it 'writes to Local cache' do described_class.cache_write('local.w', 'data', ttl: 60, scope: :local) expect(Legion::Cache::Local).to have_received(:set).with('local.w', 'data', 60) end + + it 'falls back to memory when Local writes raise' do + allow(Legion::Cache::Local).to receive(:set).with('local.error', 'data', 60).and_raise(StandardError, 'boom') + + described_class.cache_write('local.error', 'data', ttl: 60, scope: :local) + expect(described_class.memory_read('local.error')).to eq('data') + end end end @@ -202,6 +223,17 @@ def method_b(**) expect(a[:method]).to eq(:a) expect(b[:method]).to eq(:b) end + + it 'falls back to memory when the local backend is connected but failing' do + allow(Legion::Cache::Cacheable).to receive(:local_cache_available?).and_return(true) + allow(Legion::Cache::Local).to receive(:get).and_raise(StandardError, 'read failed') + allow(Legion::Cache::Local).to receive(:set).and_raise(StandardError, 'write failed') + + first = instance.fetch_data(user_id: 'alice') + second = instance.fetch_data(user_id: 'alice') + + expect(second[:fetched_at]).to eq(first[:fetched_at]) + end end describe 'bypass_local_method_cache' do diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index b28e00a..45ef2e0 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -176,6 +176,32 @@ result = described_class.resolve_servers(driver: 'dalli') expect(result).to eq(['127.0.0.1:11211']) end + + it 'adds the default port to raw IPv6 hosts' do + result = described_class.resolve_servers(driver: 'redis', servers: ['::1']) + expect(result).to eq(['[::1]:6379']) + end + + it 'adds the default port to bracketed IPv6 hosts without one' do + result = described_class.resolve_servers(driver: 'redis', servers: ['[::1]']) + expect(result).to eq(['[::1]:6379']) + end + + it 'preserves explicit ports for bracketed IPv6 hosts' do + result = described_class.resolve_servers(driver: 'redis', servers: ['[::1]:6380']) + expect(result).to eq(['[::1]:6380']) + end + end + + describe '.register_defaults!' do + it 'merges both shared and local defaults when Legion::Settings can merge settings' do + allow(Legion::Settings).to receive(:merge_settings) + + described_class.register_defaults! + + expect(Legion::Settings).to have_received(:merge_settings).with(:cache, hash_including(namespace: 'legion')) + expect(Legion::Settings).to have_received(:merge_settings).with(:cache_local, hash_including(namespace: 'legion_local')) + end end describe '.driver' do From 31724a4426a7ff9324a511ae5dcc5581ec1ea367 Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 15:55:14 -0500 Subject: [PATCH 068/108] make default rspec suite hermetic --- spec/legion/cache_fallback_spec.rb | 80 +++++++++++++++++++----------- spec/legion/local_spec.rb | 2 +- spec/legion/memcached_spec.rb | 2 +- spec/legion/redis_spec.rb | 2 +- spec/spec_helper.rb | 2 +- 5 files changed, 54 insertions(+), 34 deletions(-) diff --git a/spec/legion/cache_fallback_spec.rb b/spec/legion/cache_fallback_spec.rb index 24751e5..fb5c52f 100644 --- a/spec/legion/cache_fallback_spec.rb +++ b/spec/legion/cache_fallback_spec.rb @@ -4,6 +4,40 @@ require 'legion/cache' RSpec.describe 'Legion::Cache fallback' do + let(:local_store) { {} } + + before do + Legion::Cache.instance_variable_set(:@client, nil) + Legion::Cache.instance_variable_set(:@connected, false) + Legion::Cache.instance_variable_set(:@using_local, false) + Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@active_shared_driver, nil) + + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:setup).and_return(true) + allow(Legion::Cache::Local).to receive(:shutdown).and_return(false) + allow(Legion::Cache::Local).to receive(:close).and_return(false) + allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } + allow(Legion::Cache::Local).to receive(:set) do |key, value, _ttl| + local_store[key] = value + true + end + allow(Legion::Cache::Local).to receive(:delete) do |key| + !local_store.delete(key).nil? + end + allow(Legion::Cache::Local).to receive(:fetch) do |key, _ttl, &block| + next local_store[key] if local_store.key?(key) + + value = block.call + local_store[key] = value + value + end + allow(Legion::Cache::Local).to receive(:flush) do |_delay = 0| + local_store.clear + true + end + end + describe '.local' do it 'returns Legion::Cache::Local' do expect(Legion::Cache.local).to eq Legion::Cache::Local @@ -14,64 +48,50 @@ it 'responds to using_local?' do expect(Legion::Cache).to respond_to(:using_local?) end - - it 'defaults to false when shared is available' do - Legion::Cache.setup - expect(Legion::Cache.using_local?).to eq false - Legion::Cache.shutdown - end end describe 'fallback on shared failure' do before do - Legion::Cache::Local.reset! - # Force disconnected state - Legion::Cache.close if Legion::Cache.connected? - Legion::Cache.instance_variable_set(:@connected, false) - Legion::Cache.instance_variable_set(:@client, nil) - Legion::Cache.instance_variable_set(:@using_local, false) - # Stub client to raise a connection error (no network calls) allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'connection refused') end - after do - allow(Legion::Cache).to receive(:client).and_call_original - Legion::Cache::Local.shutdown if Legion::Cache::Local.connected? - Legion::Cache.instance_variable_set(:@using_local, false) - Legion::Cache.instance_variable_set(:@connected, false) - end - it 'falls back to local when shared raises' do Legion::Cache.setup - expect(Legion::Cache.connected?).to eq true - expect(Legion::Cache.using_local?).to eq true + expect(Legion::Cache.connected?).to be(true) + expect(Legion::Cache.using_local?).to be(true) end it 'delegates get/set/delete to local when in fallback mode' do Legion::Cache.setup - expect(Legion::Cache.set('fallback_test', 'works')).to eq true - expect(Legion::Cache.get('fallback_test')).to eq 'works' - expect(Legion::Cache.delete('fallback_test')).to eq true + expect(Legion::Cache.set('fallback_test', 'works')).to be(true) + expect(Legion::Cache.get('fallback_test')).to eq('works') + expect(Legion::Cache.delete('fallback_test')).to be(true) end - it 'delegates fetch to local when in fallback mode' do + it 'delegates fetch blocks to local when in fallback mode' do Legion::Cache.setup - Legion::Cache.set('fetch_test', 'fetchval') - expect(Legion::Cache.fetch('fetch_test')).to eq 'fetchval' + fetch_block = proc { 'fetchval' } + + expect(Legion::Cache.fetch('fetch_test', 60, &fetch_block)).to eq('fetchval') + expect(Legion::Cache.fetch('fetch_test')).to eq('fetchval') end it 'delegates flush to local when in fallback mode' do Legion::Cache.setup Legion::Cache.set('flush_test', 'bye') - expect(Legion::Cache.flush).to eq true + + expect(Legion::Cache.flush).to be(true) + expect(Legion::Cache.get('flush_test')).to be_nil end end describe 'shutdown' do it 'resets using_local? to false after shutdown' do + allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'connection refused') + Legion::Cache.setup Legion::Cache.shutdown - expect(Legion::Cache.using_local?).to eq false + expect(Legion::Cache.using_local?).to be(false) end end end diff --git a/spec/legion/local_spec.rb b/spec/legion/local_spec.rb index 4346383..9d09211 100644 --- a/spec/legion/local_spec.rb +++ b/spec/legion/local_spec.rb @@ -80,7 +80,7 @@ end end -RSpec.describe 'Legion::Cache::Local integration' do +RSpec.describe 'Legion::Cache::Local integration', :integration do before(:all) do Legion::Cache::Local.reset! Legion::Cache::Local.setup diff --git a/spec/legion/memcached_spec.rb b/spec/legion/memcached_spec.rb index f7eca98..01212fe 100644 --- a/spec/legion/memcached_spec.rb +++ b/spec/legion/memcached_spec.rb @@ -3,7 +3,7 @@ require 'spec_helper' require 'legion/cache/memcached' -RSpec.describe Legion::Cache::Memcached do +RSpec.describe Legion::Cache::Memcached, :integration do before(:all) do @cache = Legion::Cache::Memcached end diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index 50ec7b0..a61cd53 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -2,7 +2,7 @@ require 'legion/cache/redis' -RSpec.describe Legion::Cache::Redis do +RSpec.describe Legion::Cache::Redis, :integration do before(:all) do @cache = Legion::Cache::Redis end diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb index 8118a97..643f953 100644 --- a/spec/spec_helper.rb +++ b/spec/spec_helper.rb @@ -14,12 +14,12 @@ require 'legion/cache/redis_hash' require 'legion/cache/helper' -Legion::Settings.merge_settings('cache', Legion::Cache::Settings.default) Legion::Settings.load RSpec.configure do |config| config.example_status_persistence_file_path = '.rspec_status' config.disable_monkey_patching! + config.filter_run_excluding integration: true unless ENV['RUN_INTEGRATION_SPECS'] == '1' config.expect_with :rspec do |c| c.syntax = :expect end From 844d426a6bbef2cbae1261ea7750625f1978c057 Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 15:56:23 -0500 Subject: [PATCH 069/108] update changelog for v1.3.21 --- CHANGELOG.md | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/CHANGELOG.md b/CHANGELOG.md index eb60206..fdb5f39 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -4,6 +4,12 @@ ## [1.3.21] - 2026-04-02 +### Fixed +- Preserve `fetch` block behavior across shared, local, memory, and Redis cache paths; local-cache failures now fall back to the in-process cache and cached `false` values are retained correctly +- Move shared adapter selection to runtime setup/client calls, register cache defaults through `Legion::Cache::Settings`, and normalize IPv4/hostname/IPv6 server addresses consistently +- Restrict Redis hash/sorted-set helpers to the actual Redis backend and enforce documented TTL behavior for helper batch writes +- Make the default `bundle exec rspec` suite hermetic by excluding service-backed integration specs unless `RUN_INTEGRATION_SPECS=1` + ### Changed - Uplift cache logging internals to `Legion::Logging::Helper`, replacing direct logger calls with helper-provided `log` usage across cache runtime modules - Route rescued cache adapter/helper/setup failures through `handle_exception` and expand runtime `info`/`debug`/`error` coverage for shared, local, memory, pool, and RedisHash flows From b476d9a87d03d55450cb52a8a93839317ab18cb7 Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 16:41:17 -0500 Subject: [PATCH 070/108] bump legion-logging requirement --- CHANGELOG.md | 2 +- legion-cache.gemspec | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index fdb5f39..032c914 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -13,7 +13,7 @@ ### Changed - Uplift cache logging internals to `Legion::Logging::Helper`, replacing direct logger calls with helper-provided `log` usage across cache runtime modules - Route rescued cache adapter/helper/setup failures through `handle_exception` and expand runtime `info`/`debug`/`error` coverage for shared, local, memory, pool, and RedisHash flows -- Require `legion-logging >= 1.4.3` at runtime so helper exception handling is always available +- Require `legion-logging >= 1.5.0` at runtime so helper exception handling is always available ## [1.3.20] - 2026-03-31 diff --git a/legion-cache.gemspec b/legion-cache.gemspec index 3cdd507..60db24b 100644 --- a/legion-cache.gemspec +++ b/legion-cache.gemspec @@ -28,7 +28,7 @@ Gem::Specification.new do |spec| spec.add_dependency 'connection_pool', '>= 2.4' spec.add_dependency 'dalli', '>= 3.0' - spec.add_dependency 'legion-logging', '>= 1.4.3' + spec.add_dependency 'legion-logging', '>= 1.5.0' spec.add_dependency 'legion-settings', '>= 1.3.12' spec.add_dependency 'redis', '>= 5.0' end From d181f339dc001c9f5301369532597b4306cfb0b1 Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 17:22:09 -0500 Subject: [PATCH 071/108] apply copilot review suggestions (#13) --- lib/legion/cache/pool.rb | 4 +++- spec/legion/redis_spec.rb | 1 + 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/lib/legion/cache/pool.rb b/lib/legion/cache/pool.rb index 016716a..ff72b30 100644 --- a/lib/legion/cache/pool.rb +++ b/lib/legion/cache/pool.rb @@ -30,7 +30,9 @@ def available end def close - client.shutdown(&:close) + return unless @client + + @client.shutdown(&:close) @client = nil @connected = false log.info "#{pool_log_name} pool closed" diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index a61cd53..c8bb0c3 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -1,5 +1,6 @@ # frozen_string_literal: true +require 'spec_helper' require 'legion/cache/redis' RSpec.describe Legion::Cache::Redis, :integration do From 7da4f7749c7d7b0f6f6c58ac389b97b16f7fce3e Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 18:04:22 -0500 Subject: [PATCH 072/108] apply copilot review suggestions (#13) add mget/mset to Legion::Cache::Memcached using dalli get_multi/set_multi so that super in Legion::Cache#mget/#mset always resolves to a real implementation when the memcached adapter is active --- lib/legion/cache/memcached.rb | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 5278873..cb17448 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -99,6 +99,29 @@ def flush(delay = 0) raise end + def mget(*keys) + keys = keys.flatten + return {} if keys.empty? + + result = client.with { |conn| conn.get_multi(*keys) } + cache_logger.debug "[cache] MGET keys=#{keys.size} hits=#{result.size}" + result + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :memcached_mget, key_count: keys.size) + raise + end + + def mset(hash) + return true if hash.empty? + + client.with { |conn| conn.set_multi(hash) } + cache_logger.debug "[cache] MSET keys=#{hash.size}" + true + rescue StandardError => e + handle_exception(e, level: :warn, handled: false, operation: :memcached_mset, key_count: hash.size) + raise + end + private def cache_logger From 692cadbb038299cb9470b60bd67e8ace049944db Mon Sep 17 00:00:00 2001 From: Esity Date: Thu, 2 Apr 2026 18:50:07 -0500 Subject: [PATCH 073/108] apply copilot review suggestions (#13) switch log.debug string literals to block form in memory.rb and cacheable.rb to defer interpolation when debug logging is disabled --- lib/legion/cache/cacheable.rb | 4 ++-- lib/legion/cache/memory.rb | 10 +++++----- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index e9eaef4..2968bdf 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -34,9 +34,9 @@ def cache_method(method_name, ttl:, scope: :local, exclude_from_key: []) unless bypass_local_method_cache cached = Legion::Cache::Cacheable.cache_read(key, scope: config[:scope]) if cached.nil? - Legion::Cache::Cacheable.log.debug "[cacheable] miss key=#{key}" + Legion::Cache::Cacheable.log.debug { "[cacheable] miss key=#{key}" } else - Legion::Cache::Cacheable.log.debug "[cacheable] hit key=#{key}" + Legion::Cache::Cacheable.log.debug { "[cacheable] hit key=#{key}" } return cached end end diff --git a/lib/legion/cache/memory.rb b/lib/legion/cache/memory.rb index 3058786..615fb7b 100644 --- a/lib/legion/cache/memory.rb +++ b/lib/legion/cache/memory.rb @@ -29,7 +29,7 @@ def get(key) @mutex.synchronize do expire_if_needed(key) result = @store[key] - log.debug "[cache:memory] GET #{key} hit=#{!result.nil?}" + log.debug { "[cache:memory] GET #{key} hit=#{!result.nil?}" } result end end @@ -42,7 +42,7 @@ def set(key, value, ttl = nil) else @expiry.delete(key) end - log.debug "[cache:memory] SET #{key} ttl=#{ttl.inspect}" + log.debug { "[cache:memory] SET #{key} ttl=#{ttl.inspect}" } value end end @@ -51,7 +51,7 @@ def fetch(key, ttl = nil) val = get(key) return val unless val.nil? - log.debug "[cache:memory] FETCH #{key} miss=true" + log.debug { "[cache:memory] FETCH #{key} miss=true" } val = yield if block_given? set(key, val, ttl) val @@ -61,7 +61,7 @@ def delete(key) @mutex.synchronize do removed = @store.delete(key) @expiry.delete(key) - log.debug "[cache:memory] DELETE #{key} success=#{!removed.nil?}" + log.debug { "[cache:memory] DELETE #{key} success=#{!removed.nil?}" } removed end end @@ -104,7 +104,7 @@ def expire_if_needed(key) @store.delete(key) @expiry.delete(key) - log.debug "[cache:memory] EXPIRE #{key}" + log.debug { "[cache:memory] EXPIRE #{key}" } end end end From ac4b1978ff2c7ef2656b1d555dfbb826d5aafeae Mon Sep 17 00:00:00 2001 From: Esity Date: Fri, 3 Apr 2026 11:11:23 -0500 Subject: [PATCH 074/108] fix stale default servers overriding user-configured cache host --- CHANGELOG.md | 5 +++++ lib/legion/cache/settings.rb | 4 ++-- lib/legion/cache/version.rb | 2 +- spec/legion/settings_spec.rb | 10 ++++------ 4 files changed, 12 insertions(+), 9 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 032c914..833ac54 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,11 @@ ## [Unreleased] +## [1.3.22] - 2026-04-03 + +### Fixed +- Default `servers` no longer pre-computed at require time with stale driver port; resolves Redis connecting to `127.0.0.1:11211` (memcached default) instead of user-configured host + ## [1.3.21] - 2026-04-02 ### Fixed diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 285f0a9..2d91fd3 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -20,7 +20,7 @@ module Settings def self.default { driver: driver, - servers: resolve_servers(driver: driver), + servers: [], connected: false, enabled: true, namespace: 'legion', @@ -46,7 +46,7 @@ def self.default def self.local { driver: driver, - servers: resolve_servers(driver: driver), + servers: [], connected: false, enabled: true, namespace: 'legion_local', diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index fa9c472..01905a5 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.21' + VERSION = '1.3.22' end end diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index 45ef2e0..da780a2 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -16,9 +16,8 @@ expect(%w[dalli redis]).to include(defaults[:driver]) end - it 'has servers default matching driver port' do - expected_port = defaults[:driver] == 'redis' ? 6379 : 11_211 - expect(defaults[:servers]).to eq(["127.0.0.1:#{expected_port}"]) + it 'defaults servers to empty array (resolved at connection time)' do + expect(defaults[:servers]).to eq([]) end it 'has connected set to false' do @@ -77,9 +76,8 @@ expect(locals[:enabled]).to eq(true) end - it 'defaults servers to localhost with driver-appropriate port' do - expected_port = locals[:driver] == 'redis' ? 6379 : 11_211 - expect(locals[:servers]).to eq(["127.0.0.1:#{expected_port}"]) + it 'defaults servers to empty array (resolved at connection time)' do + expect(locals[:servers]).to eq([]) end it 'defaults namespace to legion_local' do From 606d74d0e04d2d97d9003db82df1c3d2fa02cc94 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:33:17 -0500 Subject: [PATCH 075/108] add cache optimization design doc --- .../2026-04-06-cache-optimization-design.md | 251 ++++++++++++++++++ 1 file changed, 251 insertions(+) create mode 100644 docs/plans/2026-04-06-cache-optimization-design.md diff --git a/docs/plans/2026-04-06-cache-optimization-design.md b/docs/plans/2026-04-06-cache-optimization-design.md new file mode 100644 index 0000000..74fdb7d --- /dev/null +++ b/docs/plans/2026-04-06-cache-optimization-design.md @@ -0,0 +1,251 @@ +# Legion::Cache Optimization Design + +**Date**: 2026-04-06 +**Author**: Matthew Iverson (@Esity) +**Status**: Approved + +## Goals + +Normalize the Legion::Cache codebase so that all drivers (Memcached, Redis, Memory) and both tiers (shared, local) present a uniform interface. Add async writes, background reconnection, transparent serialization, and operational observability. + +## Key Decisions + +### 1. Unified Method Signatures + +Every driver and both tiers share this exact public API: + +```ruby +# Core operations +get(key) # -> value or nil +set(key, value, ttl: nil, async: true, phi: false) # -> true (async), true/false or raise (sync) +fetch(key, ttl: nil, &block) # -> value or nil +delete(key, async: true) # -> true (async), true/false or raise (sync) +flush # -> true/false +mget(*keys) # -> Hash { key => value } +mset(hash, ttl: nil, async: true) # -> true (async), true/false or raise (sync) + +# Lifecycle +setup(**) +shutdown +restart(**) + +# Status +connected? # actual connection state (cached flag, no network call) +enabled? # desired state from Legion::Settings +stats # frozen Hash snapshot +``` + +- TTL is keyword-only (`ttl:`) everywhere, always Integer seconds, always optional. +- Default TTL: global = 3600 (1 hour), local = 21600 (6 hours). +- `flush` drops the `delay` argument (Memcached-specific, Redis doesn't support it). +- `async: true` is the default for all write operations. + +### 2. Write Delegation Pattern + +Every write method (`set`, `delete`, `mset`) delegates to sync/async variants: + +``` +set(key, value, ttl:, async: true) + -> async: true -> set_async(key, value, ttl:) -> pool worker -> set_sync(key, value, ttl:) + -> async: false -> set_sync(key, value, ttl:) +``` + +`set_sync` is the single source of truth for the actual driver write. Every path converges there. + +Same pattern for `delete` and `mset`: +``` +delete(key, async:) -> delete_sync(key) / delete_async(key) +mset(hash, ttl:, async:) -> mset_sync(hash, ttl:) / mset_async(hash, ttl:) +``` + +### 3. Exception Handling Model + +| Category | Re-raise? | `handled:` | Returns on failure | +|---|---|---|---| +| Reads (`get`, `fetch`, `mget`) | No | `true` | `nil` / `{}` | +| Sync writes (`set_sync`, `delete_sync`, `mset_sync`) | Yes | `false` | raises | +| Async writes (inside pool worker) | No | `true` | logged only | +| Lifecycle (`setup`, `shutdown`, `restart`) | No | `true` | sets `@connected = false` | + +Every `handle_exception` call includes `operation:` context for traceability. + +Fixes: +- Memcached `get` currently checks `result[0]` before `result.nil?` -- removed. +- Redis catches `::Redis::BaseError` -- changed to `StandardError` for consistency. + +### 4. Transparent JSON Serialization (Redis driver) + +When using the Redis driver, complex types are serialized transparently: + +**On `set_sync`:** +- String values -> stored with `type:string` prefix byte +- Hash/Array/JSON-serializable -> `Legion::JSON.dump` with `type:json` prefix byte + +**On `get`:** +- `type:json` prefix -> `Legion::JSON.load` +- `type:string` or no prefix (legacy data) -> return raw string +- Deserialization failure -> return raw string, log warning + +Memcached uses Dalli's `serializer` option (already `Legion::JSON`). Memory stores Ruby objects directly. No changes needed for either. + +`RedisHash` module is unchanged -- it remains the explicit "I want Redis data structures" path. + +### 5. `enabled?` vs `connected?` + +- `enabled?` = desired state from `Legion::Settings[:cache][:enabled]` (or `:cache_local`). Config-driven. Connection errors never change it. +- `connected?` = actual state. Cached boolean flag, no network pings. +- If `enabled? == false`: `connected?` is always `false`, no retries, no connections. Reads return `nil`, async writes no-op (`true`), sync writes raise. +- If `enabled? == true && connected? == false`: reconnector runs in background. + +### 6. AsyncWriter + +New file: `lib/legion/cache/async_writer.rb` + +Uses `Concurrent::ThreadPoolExecutor` (already a transitive dependency). + +```ruby +Legion::Cache::AsyncWriter + .start(pool_size:, queue_size:, shutdown_timeout:) + .stop(timeout:) # drains queue, waits up to timeout, then kills + .enqueue(&block) # submits work to the pool + .running? + .pool_size # current thread count + .queue_depth # pending jobs + .processed_count # total completed (atomic counter) +``` + +Settings (`Legion::Settings[:cache][:async]`): +```json +{ + "pool_size": 4, + "queue_size": 1000, + "shutdown_timeout": 5 +} +``` + +**Backpressure:** When queue is full, `enqueue` falls back to synchronous execution and logs a warning. + +**Shutdown:** `Legion::Cache.shutdown` calls `AsyncWriter.stop(timeout:)`: +1. Stop accepting new work +2. Wait up to `shutdown_timeout` seconds for drain +3. Force-kill remaining threads if timeout exceeded +4. Log drained vs abandoned job counts + +### 7. Reconnector + +New file: `lib/legion/cache/reconnector.rb` + +One instance per tier (shared, local). + +**Behavior:** +- Triggered when lifecycle fails and `enabled? == true` +- Only one reconnect loop per tier (mutex-guarded) +- Exponential backoff: 1s -> 2s -> 4s -> ... -> 60s cap +- Unlimited retries while `enabled? == true` +- On success: reset backoff, set `@connected = true` +- On `enabled?` becoming `false`: stop immediately +- Read/write callers never trigger reconnect directly (no thundering herd) + +Settings (`Legion::Settings[:cache][:reconnect]`): +```json +{ + "initial_delay": 1, + "max_delay": 60, + "enabled": true +} +``` + +### 8. Stats + +```ruby +Legion::Cache.stats +# => { +# driver: "dalli", +# servers: ["10.0.1.50:11211", "10.0.1.51:11211"], +# enabled: true, +# connected: true, +# using_local: false, +# using_memory: false, +# pool_size: 10, +# pool_available: 7, +# async_pool_size: 4, +# async_queue_depth: 12, +# async_processed: 4832, +# reconnect_attempts: 0, +# uptime: 3600 +# } +``` + +`Legion::Cache::Local.stats` has the same shape minus `using_local`/`using_memory`. + +### 9. Connection Args Consistency + +Both drivers accept the same base kwargs: + +```ruby +client( + server: nil, + servers: [], + pool_size: nil, + timeout: nil, + username: nil, + password: nil, + logger: nil, + **opts # driver-specific extras (cluster:, replica:, db: for Redis) +) +``` + +Resolution chain: explicit kwarg -> `Legion::Settings[:cache]` -> `Legion::Cache::Settings.default` + +### 10. Logger Consistency + +- All modules use `Legion::Logging::Helper` and call `log` directly. +- Remove `cache_logger` / `shared_dalli_logger` indirection. +- Dalli's internal logger set to `log`. +- Uniform log format: `[cache:] key= ...` where tier is `shared`, `local`, or `memory`. + +## Implementation Phases + +Each phase is a standalone commit. + +### Phase 1: Unify method signatures +- TTL keyword-only across all drivers and both tiers +- Set default TTLs (global: 3600, local: 21600) +- Drop `flush(delay)` -> `flush` +- Normalize `client` kwargs across Memcached/Redis +- Fix Memcached `get` nil-check bug +- Use `log` everywhere, remove logger indirection + +### Phase 2: Exception handling +- Wrap every public method per the exception model table +- All use `handle_exception` with `operation:` context +- Reads: handled, return nil +- Sync writes: not handled, re-raise +- Lifecycle: handled, set `@connected = false` + +### Phase 3: Transparent JSON serialization (Redis) +- Add prefix-byte serialization in Redis `set_sync`/`get` +- Graceful fallback for legacy keys (no prefix = raw string) +- No changes to Memcached or Memory + +### Phase 4: `enabled?`, `connected?`, `stats` +- Add `enabled?` to both tiers backed by settings +- Guard all operations on `enabled?` +- Add `stats` method with servers, pool info, async pool size, uptime + +### Phase 5: AsyncWriter +- New `async_writer.rb` with `Concurrent::ThreadPoolExecutor` +- Add `set_sync`/`set_async`/`set` delegation pattern for `set`, `delete`, `mset` +- `async: true` default on writes +- Backpressure: synchronous fallback when queue full + +### Phase 6: Reconnector +- New `reconnector.rb` with exponential backoff (1s -> 60s cap) +- Wire into lifecycle failures +- Respects `enabled?` -- stops if disabled +- One instance per tier, mutex-guarded + +### Phase 7: Wire together + specs +- Integration between AsyncWriter, Reconnector, and both tiers +- Shutdown drains async pool with configurable timeout +- Update all specs to cover new behavior From 342572cf23368e017bbe4c4ec60645d1335e8913 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:37:08 -0500 Subject: [PATCH 076/108] add cache optimization implementation plan --- .../2026-04-06-cache-optimization-plan.md | 1751 +++++++++++++++++ 1 file changed, 1751 insertions(+) create mode 100644 docs/plans/2026-04-06-cache-optimization-plan.md diff --git a/docs/plans/2026-04-06-cache-optimization-plan.md b/docs/plans/2026-04-06-cache-optimization-plan.md new file mode 100644 index 0000000..81fddcf --- /dev/null +++ b/docs/plans/2026-04-06-cache-optimization-plan.md @@ -0,0 +1,1751 @@ +# Legion::Cache Optimization Implementation Plan + +> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task. + +**Goal:** Normalize all Legion::Cache drivers and tiers to a uniform interface, add async writes, background reconnection, transparent serialization, and operational observability. + +**Architecture:** Seven layered phases, each independently testable and committable. Phases 1-3 normalize the existing code. Phases 4-6 add new capabilities. Phase 7 wires everything together. + +**Tech Stack:** Ruby >= 3.4, concurrent-ruby (ThreadPoolExecutor), Dalli, Redis, ConnectionPool, Legion::Logging, Legion::Settings + +**Design doc:** `docs/plans/2026-04-06-cache-optimization-design.md` + +--- + +### Task 1: Unify method signatures — Settings and defaults + +**Files:** +- Modify: `lib/legion/cache/settings.rb` +- Test: `spec/legion/settings_spec.rb` + +**Step 1: Write the failing test** + +Add to `spec/legion/settings_spec.rb`: + +```ruby +describe 'default TTL values' do + it 'has global default_ttl of 3600' do + expect(Legion::Cache::Settings.default[:default_ttl]).to eq(3600) + end + + it 'has local default_ttl of 21600' do + expect(Legion::Cache::Settings.local[:default_ttl]).to eq(21_600) + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/settings_spec.rb -v` +Expected: FAIL — default_ttl is currently 60 for both. + +**Step 3: Update settings defaults** + +In `lib/legion/cache/settings.rb`, change `self.default`: +- `default_ttl: 3600` (was 60) + +Change `self.local`: +- `default_ttl: 21_600` (was 60) + +**Step 4: Run test to verify it passes** + +Run: `bundle exec rspec spec/legion/settings_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/settings.rb spec/legion/settings_spec.rb +git commit -m "update default TTL to 3600 global, 21600 local" +``` + +--- + +### Task 2: Unify method signatures — Memcached driver + +**Files:** +- Modify: `lib/legion/cache/memcached.rb` +- Test: `spec/legion/memcached_spec.rb` + +**Step 1: Write the failing tests** + +Replace the existing `spec/legion/memcached_spec.rb` integration specs to validate the new signatures. Add these unit specs at the top (before the integration block): + +```ruby +RSpec.describe Legion::Cache::Memcached do + describe 'method signatures' do + it 'set accepts keyword ttl' do + cache = described_class.dup + pool = instance_double(ConnectionPool) + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + + dalli = instance_double(Dalli::Client) + allow(pool).to receive(:with).and_yield(dalli) + allow(dalli).to receive(:set).and_return(1) + + expect { cache.set('k', 'v', ttl: 120) }.not_to raise_error + end + + it 'flush takes no arguments' do + expect(described_class.method(:flush).arity).to eq(0) + end + + it 'uses log instead of cache_logger' do + expect(described_class.private_method_defined?(:cache_logger)).to be(false) + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/memcached_spec.rb --tag ~integration -v` +Expected: FAIL — `set` doesn't accept keyword `ttl:`, `flush` has arity 1 (the `delay` param), `cache_logger` still exists. + +**Step 3: Refactor Memcached driver** + +In `lib/legion/cache/memcached.rb`: + +1. Change `set(key, value, ttl = 180)` to `set_sync(key, value, ttl: nil)`. Resolve TTL inside: `ttl ||= default_ttl`. Add a public `set(key, value, ttl: nil, **opts)` that calls `set_sync`. +2. Change `get(key)` — remove the broken `result[0]` / `Legion::JSON.dump` logic. Dalli handles serialization via its `serializer` option already. Just return the result. +3. Change `fetch(key, ttl = nil, &)` to `fetch(key, ttl: nil, &)`. Same JSON fix as get. +4. Change `delete(key)` to `delete_sync(key)`. Add public `delete(key, **opts)` that calls `delete_sync`. +5. Change `flush(delay = 0)` to `flush`. Remove delay param. Call `conn.flush.first` with no args. +6. Change `mset(hash)` to `mset_sync(hash, ttl: nil)`. Add public `mset(hash, ttl: nil, **opts)`. +7. Change `client` kwargs to match the unified signature: `client(server: nil, servers: [], pool_size: nil, timeout: nil, username: nil, password: nil, logger: nil, **opts)`. +8. Remove `cache_logger` and `shared_dalli_logger` private methods. Replace all calls with `log`. +9. Set Dalli logger to `log` directly. +10. Add `default_ttl` private method: reads `Legion::Settings.dig(:cache, :default_ttl) || 3600`. + +**Step 4: Run all memcached specs** + +Run: `bundle exec rspec spec/legion/memcached_spec.rb --tag ~integration -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/memcached.rb spec/legion/memcached_spec.rb +git commit -m "unify memcached driver method signatures" +``` + +--- + +### Task 3: Unify method signatures — Redis driver + +**Files:** +- Modify: `lib/legion/cache/redis.rb` +- Test: `spec/legion/redis_spec.rb` + +**Step 1: Write the failing tests** + +Add unit specs to `spec/legion/redis_spec.rb`: + +```ruby +RSpec.describe Legion::Cache::Redis do + describe 'method signatures' do + it 'set accepts keyword ttl' do + cache = described_class.dup + pool = instance_double(ConnectionPool) + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + + redis = instance_double(Redis) + allow(pool).to receive(:with).and_yield(redis) + allow(redis).to receive(:set).and_return('OK') + + expect { cache.set('k', 'v', ttl: 120) }.not_to raise_error + end + + it 'fetch accepts keyword ttl' do + cache = described_class.dup + pool = instance_double(ConnectionPool) + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + + redis = instance_double(Redis) + allow(pool).to receive(:with).and_yield(redis) + allow(redis).to receive(:get).and_return('val') + + expect { cache.fetch('k', ttl: 60) }.not_to raise_error + end + + it 'flush takes no arguments' do + expect(described_class.method(:flush).arity).to eq(0) + end + + it 'uses log instead of cache_logger' do + expect(described_class.private_method_defined?(:cache_logger)).to be(false) + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/redis_spec.rb --tag ~integration -v` +Expected: FAIL + +**Step 3: Refactor Redis driver** + +In `lib/legion/cache/redis.rb`: + +1. Change `set(key, value, ttl = nil)` to `set_sync(key, value, ttl: nil)`. Resolve TTL: `ttl ||= default_ttl`. Add public `set(key, value, ttl: nil, **opts)`. +2. Change `fetch(key, ttl = nil)` to `fetch(key, ttl: nil)`. +3. Change `delete(key)` to `delete_sync(key)`. Add public `delete(key, **opts)`. +4. Change `flush` — already takes no args for Redis non-cluster. Keep as `flush`. No change needed. +5. Change `mset(hash)` to `mset_sync(hash, ttl: nil)`. Add public `mset(hash, ttl: nil, **opts)`. +6. Normalize `client` kwargs: `client(server: nil, servers: [], pool_size: nil, timeout: nil, username: nil, password: nil, logger: nil, **opts)`. Move `cluster`, `replica`, `fixed_hostname`, `db`, `reconnect_attempts` into `**opts` extraction. +7. Remove `cache_logger` private method. Replace with `log`. +8. Change all `rescue ::Redis::BaseError` to `rescue StandardError`. +9. Remove `log_cluster_error` — inline `handle_exception` calls. +10. Add `default_ttl` private method: reads `Legion::Settings.dig(:cache, :default_ttl) || 3600`. + +**Step 4: Run all redis specs** + +Run: `bundle exec rspec spec/legion/redis_spec.rb --tag ~integration -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/redis.rb spec/legion/redis_spec.rb +git commit -m "unify redis driver method signatures" +``` + +--- + +### Task 4: Unify method signatures — Memory adapter + +**Files:** +- Modify: `lib/legion/cache/memory.rb` +- Test: `spec/legion/cache/memory_spec.rb` + +**Step 1: Write the failing tests** + +Add to `spec/legion/cache/memory_spec.rb`: + +```ruby +describe 'keyword ttl' do + before { described_class.setup } + + it 'accepts ttl as keyword arg on set' do + described_class.set('kw', 'val', ttl: 300) + expect(described_class.get('kw')).to eq('val') + end + + it 'accepts ttl as keyword arg on fetch' do + result = described_class.fetch('fkw', ttl: 300) { 'fetched' } + expect(result).to eq('fetched') + end +end + +describe 'flush takes no arguments' do + it 'has arity 0' do + expect(described_class.method(:flush).arity).to eq(0) + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/memory_spec.rb -v` +Expected: FAIL — set/fetch don't accept keyword ttl, flush has arity accepting `_delay`. + +**Step 3: Refactor Memory adapter** + +In `lib/legion/cache/memory.rb`: + +1. Change `set(key, value, ttl = nil)` to `set_sync(key, value, ttl: nil)`. Add public `set(key, value, ttl: nil, **opts)` that calls `set_sync`. +2. Change `fetch(key, ttl = nil)` to `fetch(key, ttl: nil, &block)`. +3. Change `flush(_delay = 0)` to `flush`. +4. Add `delete_sync(key)` (rename current `delete`). Add public `delete(key, **opts)`. +5. Add `default_ttl` returning `3600`. + +**Step 4: Run test to verify it passes** + +Run: `bundle exec rspec spec/legion/cache/memory_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/memory.rb spec/legion/cache/memory_spec.rb +git commit -m "unify memory adapter method signatures" +``` + +--- + +### Task 5: Unify method signatures — Local tier + +**Files:** +- Modify: `lib/legion/cache/local.rb` +- Test: `spec/legion/local_spec.rb` + +**Step 1: Write the failing tests** + +Add to the unit spec section of `spec/legion/local_spec.rb`: + +```ruby +describe 'method signatures' do + it 'responds to enabled?' do + expect(described_class).to respond_to(:enabled?) + end + + it 'set accepts keyword ttl' do + driver = double('driver') + allow(driver).to receive(:set_sync) + described_class.instance_variable_set(:@driver, driver) + described_class.instance_variable_set(:@connected, true) + expect { described_class.set('k', 'v', ttl: 120) }.not_to raise_error + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/local_spec.rb --tag ~integration -v` +Expected: FAIL + +**Step 3: Refactor Local tier** + +In `lib/legion/cache/local.rb`: + +1. Change `set(key, value, ttl = 180)` to `set(key, value, ttl: nil, async: true, phi: false)`. Resolve TTL: `ttl ||= local_default_ttl`. Delegate to `set_sync` or `set_async`. +2. Add `set_sync(key, value, ttl:)`, `set_async(key, value, ttl:)`. +3. Change `fetch(key, ttl = nil, &)` to `fetch(key, ttl: nil, &)`. Remove the broken JSON dump logic (same bug as Memcached get — checking `result[0]` before nil check). +4. Change `delete(key)` to `delete(key, async: true)` with sync/async delegation. +5. Change `flush(delay = 0)` to `flush`. +6. Add `mget(*keys)` and `mset(hash, ttl: nil, async: true)`. +7. Add `local_default_ttl` private method: reads `Legion::Settings.dig(:cache_local, :default_ttl) || 21_600`. + +**Step 4: Run test to verify it passes** + +Run: `bundle exec rspec spec/legion/local_spec.rb --tag ~integration -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/local.rb spec/legion/local_spec.rb +git commit -m "unify local tier method signatures" +``` + +--- + +### Task 6: Unify method signatures — Top-level Legion::Cache + +**Files:** +- Modify: `lib/legion/cache.rb` +- Test: `spec/legion/cache_spec.rb`, `spec/legion/cache_interface_spec.rb`, `spec/legion/cache_fallback_spec.rb` + +**Step 1: Write the failing tests** + +Add to `spec/legion/cache_interface_spec.rb`: + +```ruby +it 'set accepts keyword ttl and async' do + params = Legion::Cache.method(:set).parameters + names = params.map(&:last) + expect(names).to include(:ttl) + expect(names).to include(:async) +end + +it 'delete accepts keyword async' do + params = Legion::Cache.method(:delete).parameters + names = params.map(&:last) + expect(names).to include(:async) +end + +it 'flush takes no arguments' do + expect(Legion::Cache.method(:flush).arity).to eq(0) +end + +it 'responds to enabled?' do + expect(Legion::Cache).to respond_to(:enabled?) +end +``` + +Update `spec/legion/cache_fallback_spec.rb` stubs to use new keyword signatures: +- Change `allow(Legion::Cache::Local).to receive(:set) do |key, value, _ttl|` to `do |key, value, ttl: nil, **|` +- Change `allow(Legion::Cache::Local).to receive(:fetch) do |key, _ttl, &block|` to `do |key, ttl: nil, &block|` +- Change `allow(Legion::Cache::Local).to receive(:flush) do |_delay = 0|` to `do` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache_interface_spec.rb spec/legion/cache_fallback_spec.rb -v` +Expected: FAIL + +**Step 3: Refactor top-level module** + +In `lib/legion/cache.rb`: + +1. Change `set(key, value, ttl = nil, **opts)` to `set(key, value, ttl: nil, async: true, phi: false)`. Resolve TTL from settings, enforce PHI, delegate to `set_sync`/`set_async`. +2. Add `set_sync(key, value, ttl:)`, `set_async(key, value, ttl:)`. +3. Change `fetch(key, ttl = nil, &)` to `fetch(key, ttl: nil, &)`. +4. Change `delete(key)` to `delete(key, async: true)` with sync/async delegation. +5. Change `flush(delay = 0)` to `flush`. +6. Change `mget(*keys)` — keep as is, signature is fine. +7. Change `mset(hash)` to `mset(hash, ttl: nil, async: true)`. +8. Delegation to Memory/Local adapters must use the new keyword signatures. + +**Step 4: Run full spec suite** + +Run: `bundle exec rspec --tag ~integration -v` +Expected: PASS (all unit specs green) + +**Step 5: Commit** + +```bash +git add lib/legion/cache.rb spec/legion/cache_spec.rb spec/legion/cache_interface_spec.rb spec/legion/cache_fallback_spec.rb +git commit -m "unify top-level cache method signatures" +``` + +--- + +### Task 7: Exception handling — All drivers + +**Files:** +- Modify: `lib/legion/cache/memcached.rb`, `lib/legion/cache/redis.rb`, `lib/legion/cache/memory.rb` +- Test: `spec/legion/cache/exception_handling_spec.rb` (new) + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/exception_handling_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/memory' + +RSpec.describe 'exception handling' do + describe Legion::Cache::Memory do + before { described_class.setup } + after { described_class.reset! } + + describe 'reads return nil on error' do + it 'get returns nil when store raises' do + described_class.instance_variable_get(:@store) + allow(described_class).to receive(:expire_if_needed).and_raise(RuntimeError, 'boom') + expect(described_class.get('key')).to be_nil + end + end + + describe 'sync writes re-raise' do + it 'set_sync raises on error' do + allow(described_class.instance_variable_get(:@mutex)).to receive(:synchronize).and_raise(RuntimeError, 'boom') + expect { described_class.set_sync('k', 'v', ttl: 60) }.to raise_error(RuntimeError, 'boom') + end + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/exception_handling_spec.rb -v` +Expected: FAIL — `set_sync` not defined yet (from Task 4), or exception behavior doesn't match. + +**Step 3: Add exception handling to all drivers** + +For each driver (`memcached.rb`, `redis.rb`, `memory.rb`): + +**Reads** (`get`, `fetch`, `mget`): +```ruby +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :_get, key: key) + nil # or {} for mget +``` + +**Sync writes** (`set_sync`, `delete_sync`, `mset_sync`): +```ruby +rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :_set_sync, key: key) + raise e +``` + +**Lifecycle** (`client`, `close`, `restart`): +```ruby +rescue StandardError => e + handle_exception(e, level: :error, handled: true, operation: :_client) + @connected = false +``` + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/exception_handling_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/memcached.rb lib/legion/cache/redis.rb lib/legion/cache/memory.rb spec/legion/cache/exception_handling_spec.rb +git commit -m "add uniform exception handling across all drivers" +``` + +--- + +### Task 8: Exception handling — Local tier and top-level + +**Files:** +- Modify: `lib/legion/cache/local.rb`, `lib/legion/cache.rb` +- Test: `spec/legion/cache/exception_handling_spec.rb` (append) + +**Step 1: Write the failing tests** + +Append to `spec/legion/cache/exception_handling_spec.rb`: + +```ruby +RSpec.describe 'Legion::Cache top-level exception handling' do + before do + ENV['LEGION_MODE'] = 'lite' + Legion::Cache::Memory.setup + Legion::Cache.instance_variable_set(:@using_memory, true) + Legion::Cache.instance_variable_set(:@connected, true) + end + + after do + ENV.delete('LEGION_MODE') + Legion::Cache::Memory.reset! + Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@connected, false) + end + + it 'get returns nil on internal error' do + allow(Legion::Cache::Memory).to receive(:get).and_raise(RuntimeError, 'boom') + expect(Legion::Cache.get('key')).to be_nil + end + + it 'set_sync re-raises on error' do + allow(Legion::Cache::Memory).to receive(:set_sync).and_raise(RuntimeError, 'boom') + expect { Legion::Cache.set_sync('k', 'v', ttl: 60) }.to raise_error(RuntimeError, 'boom') + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/exception_handling_spec.rb -v` +Expected: FAIL + +**Step 3: Add exception handling to Local and top-level** + +Apply the same exception model to `lib/legion/cache/local.rb` and `lib/legion/cache.rb`: +- Reads: handled, return nil +- Sync writes: not handled, re-raise +- Lifecycle: handled, set `@connected = false` + +**Step 4: Run full suite** + +Run: `bundle exec rspec --tag ~integration -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/local.rb lib/legion/cache.rb spec/legion/cache/exception_handling_spec.rb +git commit -m "add exception handling to local tier and top-level cache" +``` + +--- + +### Task 9: Transparent JSON serialization — Redis driver + +**Files:** +- Modify: `lib/legion/cache/redis.rb` +- Test: `spec/legion/cache/redis_serialization_spec.rb` (new) + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/redis_serialization_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/redis' + +RSpec.describe 'Redis transparent serialization' do + let(:cache) { Legion::Cache::Redis.dup } + let(:pool) { instance_double(ConnectionPool) } + let(:redis) { instance_double(Redis) } + + before do + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + allow(pool).to receive(:with).and_yield(redis) + end + + describe 'set_sync serializes complex types' do + it 'prefixes strings with S' do + expect(redis).to receive(:set).with('k', "S\x00hello", any_args).and_return('OK') + cache.set_sync('k', 'hello', ttl: 60) + end + + it 'prefixes hashes with J and JSON-encodes' do + expect(redis).to receive(:set).with('k', /\AJ\x00/, any_args).and_return('OK') + cache.set_sync('k', { foo: 'bar' }, ttl: 60) + end + + it 'prefixes arrays with J and JSON-encodes' do + expect(redis).to receive(:set).with('k', /\AJ\x00/, any_args).and_return('OK') + cache.set_sync('k', [1, 2, 3], ttl: 60) + end + end + + describe 'get deserializes based on prefix' do + it 'returns plain string for S prefix' do + allow(redis).to receive(:get).and_return("S\x00hello") + expect(cache.get('k')).to eq('hello') + end + + it 'returns parsed hash for J prefix' do + json = Legion::JSON.dump({ foo: 'bar' }) + allow(redis).to receive(:get).and_return("J\x00#{json}") + result = cache.get('k') + expect(result).to be_a(Hash) + expect(result[:foo] || result['foo']).to eq('bar') + end + + it 'returns raw string for legacy data without prefix' do + allow(redis).to receive(:get).and_return('legacy_value') + expect(cache.get('k')).to eq('legacy_value') + end + + it 'returns raw string when JSON parse fails' do + allow(redis).to receive(:get).and_return("J\x00not-valid-json{{{") + expect(cache.get('k')).to eq("J\x00not-valid-json{{{") + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/redis_serialization_spec.rb -v` +Expected: FAIL — no prefix serialization exists yet. + +**Step 3: Implement serialization** + +In `lib/legion/cache/redis.rb`, add private methods: + +```ruby +SERIALIZE_STRING = "S\x00".b.freeze +SERIALIZE_JSON = "J\x00".b.freeze + +def serialize_value(value) + case value + when String + "#{SERIALIZE_STRING}#{value}" + else + "#{SERIALIZE_JSON}#{Legion::JSON.dump(value)}" + end +end + +def deserialize_value(raw) + return nil if raw.nil? + + if raw.start_with?(SERIALIZE_JSON) + Legion::JSON.load(raw.byteslice(2..)) + elsif raw.start_with?(SERIALIZE_STRING) + raw.byteslice(2..) + else + raw # legacy data, no prefix + end +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :redis_deserialize) + raw +end +``` + +Wire `serialize_value` into `set_sync` and `deserialize_value` into `get`. + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/redis_serialization_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/redis.rb spec/legion/cache/redis_serialization_spec.rb +git commit -m "add transparent JSON serialization for redis driver" +``` + +--- + +### Task 10: Add `enabled?` and `connected?` — both tiers + +**Files:** +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb`, `lib/legion/cache/memory.rb` +- Test: `spec/legion/cache/enabled_spec.rb` (new) + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/enabled_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'enabled? and connected?' do + before do + Legion::Cache.instance_variable_set(:@connected, false) + Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@using_local, false) + Legion::Cache::Local.reset! + end + + describe 'Legion::Cache.enabled?' do + it 'returns true when settings enabled is true' do + Legion::Settings[:cache][:enabled] = true + expect(Legion::Cache.enabled?).to be(true) + end + + it 'returns false when settings enabled is false' do + Legion::Settings[:cache][:enabled] = false + expect(Legion::Cache.enabled?).to be(false) + end + end + + describe 'Legion::Cache::Local.enabled?' do + it 'reads from cache_local settings' do + Legion::Settings[:cache_local] ||= {} + Legion::Settings[:cache_local][:enabled] = false + expect(Legion::Cache::Local.enabled?).to be(false) + end + end + + describe 'when disabled' do + before { Legion::Settings[:cache][:enabled] = false } + after { Legion::Settings[:cache][:enabled] = true } + + it 'connected? returns false even if @connected is true' do + Legion::Cache.instance_variable_set(:@connected, true) + expect(Legion::Cache.connected?).to be(false) + end + + it 'get returns nil' do + expect(Legion::Cache.get('anything')).to be_nil + end + + it 'set with async: true returns true (no-op)' do + expect(Legion::Cache.set('k', 'v', async: true)).to be(true) + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/enabled_spec.rb -v` +Expected: FAIL + +**Step 3: Implement enabled?** + +In `lib/legion/cache.rb`: +```ruby +def enabled? + return true unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :enabled) != false +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_enabled) + true +end + +def connected? + return false unless enabled? + + @connected == true +end +``` + +Guard all operations: `return nil unless enabled?` at top of `get`, `fetch`, `mget`. For writes: `return true unless enabled?` for async, raise for sync. + +Same pattern in `lib/legion/cache/local.rb` reading from `:cache_local`. + +In `lib/legion/cache/memory.rb` add `enabled?` returning `true` always (memory adapter is always available in lite mode). + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/enabled_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/local.rb lib/legion/cache/memory.rb spec/legion/cache/enabled_spec.rb +git commit -m "add enabled? guard to both cache tiers" +``` + +--- + +### Task 11: Add `stats` method — both tiers + +**Files:** +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` +- Test: `spec/legion/cache/stats_spec.rb` (new) + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/stats_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'stats' do + describe 'Legion::Cache.stats' do + before do + ENV['LEGION_MODE'] = 'lite' + Legion::Cache.setup + end + + after do + Legion::Cache.shutdown + ENV.delete('LEGION_MODE') + end + + it 'returns a hash with required keys' do + stats = Legion::Cache.stats + expect(stats).to be_a(Hash) + expect(stats).to include( + :driver, :servers, :enabled, :connected, + :using_local, :using_memory, + :pool_size, :pool_available, + :async_pool_size, :async_queue_depth, :async_processed, + :reconnect_attempts, :uptime + ) + end + + it 'returns a frozen hash' do + expect(Legion::Cache.stats).to be_frozen + end + + it 'reports correct driver' do + expect(Legion::Cache.stats[:driver]).to eq('memory') + end + end + + describe 'Legion::Cache::Local.stats' do + before { Legion::Cache::Local.reset! } + + it 'responds to stats' do + expect(Legion::Cache::Local).to respond_to(:stats) + end + + it 'returns a hash with required keys' do + stats = Legion::Cache::Local.stats + expect(stats).to include(:driver, :servers, :enabled, :connected) + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/stats_spec.rb -v` +Expected: FAIL — `stats` method doesn't exist. + +**Step 3: Implement stats** + +In `lib/legion/cache.rb`: +```ruby +def stats + { + driver: driver_name, + servers: resolved_servers, + enabled: enabled?, + connected: connected?, + using_local: using_local?, + using_memory: using_memory?, + pool_size: safe_pool_size, + pool_available: safe_pool_available, + async_pool_size: async_writer_pool_size, + async_queue_depth: async_writer_queue_depth, + async_processed: async_writer_processed_count, + reconnect_attempts: reconnector_attempts, + uptime: uptime_seconds + }.freeze +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_stats) + { error: e.message }.freeze +end +``` + +Track `@setup_at = Time.now` in `setup`. Add private helpers for safe pool queries (return 0 when not connected). Async/reconnect stats return 0 for now — they'll be wired in Tasks 13-14. + +Same pattern for `Legion::Cache::Local.stats` (without `using_local`/`using_memory`). + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/stats_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/stats_spec.rb +git commit -m "add stats method to both cache tiers" +``` + +--- + +### Task 12: Add `concurrent-ruby` dependency + +**Files:** +- Modify: `legion-cache.gemspec` + +**Step 1: Add dependency** + +In `legion-cache.gemspec`, add: +```ruby +spec.add_dependency 'concurrent-ruby', '>= 1.2' +``` + +**Step 2: Verify bundle resolves** + +Run: `bundle install` +Expected: resolves successfully (concurrent-ruby already installed as transitive dep). + +**Step 3: Commit** + +```bash +git add legion-cache.gemspec +git commit -m "add concurrent-ruby dependency for async writer" +``` + +--- + +### Task 13: AsyncWriter + +**Files:** +- Create: `lib/legion/cache/async_writer.rb` +- Test: `spec/legion/cache/async_writer_spec.rb` (new) + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/async_writer_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/async_writer' + +RSpec.describe Legion::Cache::AsyncWriter do + subject(:writer) { described_class.new } + + after { writer.stop(timeout: 2) if writer.running? } + + describe '#start' do + it 'starts the thread pool' do + writer.start + expect(writer.running?).to be(true) + end + + it 'is idempotent' do + writer.start + writer.start + expect(writer.running?).to be(true) + end + end + + describe '#stop' do + it 'drains pending work within timeout' do + writer.start + completed = Concurrent::AtomicBoolean.new(false) + writer.enqueue { completed.make_true } + writer.stop(timeout: 5) + expect(completed.value).to be(true) + expect(writer.running?).to be(false) + end + end + + describe '#enqueue' do + it 'executes the block asynchronously' do + writer.start + result = Concurrent::AtomicReference.new(nil) + writer.enqueue { result.set('done') } + sleep 0.1 + expect(result.get).to eq('done') + end + + it 'increments processed_count' do + writer.start + 3.times { writer.enqueue { nil } } + sleep 0.2 + expect(writer.processed_count).to eq(3) + end + + it 'falls back to synchronous when pool is not running' do + result = nil + writer.enqueue { result = 'sync_fallback' } + expect(result).to eq('sync_fallback') + end + end + + describe '#pool_size' do + it 'returns configured pool size' do + writer.start(pool_size: 2) + expect(writer.pool_size).to eq(2) + end + end + + describe '#queue_depth' do + it 'returns 0 when idle' do + writer.start + sleep 0.05 + expect(writer.queue_depth).to eq(0) + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb -v` +Expected: FAIL — file doesn't exist. + +**Step 3: Implement AsyncWriter** + +Create `lib/legion/cache/async_writer.rb`: + +```ruby +# frozen_string_literal: true + +require 'concurrent-ruby' +require 'legion/logging/helper' + +module Legion + module Cache + class AsyncWriter + include Legion::Logging::Helper + + DEFAULT_POOL_SIZE = 4 + DEFAULT_QUEUE_SIZE = 1000 + DEFAULT_SHUTDOWN_TIMEOUT = 5 + + def initialize(pool_size: nil, queue_size: nil, shutdown_timeout: nil) + @config_pool_size = pool_size + @config_queue_size = queue_size + @config_shutdown_timeout = shutdown_timeout + @processed = Concurrent::AtomicFixnum.new(0) + @executor = nil + @mutex = Mutex.new + end + + def start(pool_size: nil, queue_size: nil, **) + @mutex.synchronize do + return if running? + + ps = pool_size || @config_pool_size || configured_pool_size + qs = queue_size || @config_queue_size || configured_queue_size + + @executor = Concurrent::ThreadPoolExecutor.new( + min_threads: 1, + max_threads: ps, + max_queue: qs, + fallback_policy: :caller_runs + ) + log.info "Legion::Cache::AsyncWriter started pool_size=#{ps} queue_size=#{qs}" + end + end + + def stop(timeout: nil) + @mutex.synchronize do + return unless @executor + + to = timeout || @config_shutdown_timeout || configured_shutdown_timeout + @executor.shutdown + unless @executor.wait_for_termination(to) + @executor.kill + log.warn "Legion::Cache::AsyncWriter force-killed after #{to}s timeout" + end + log.info "Legion::Cache::AsyncWriter stopped processed=#{@processed.value}" + @executor = nil + end + end + + def enqueue(&block) + if running? + @executor.post do + block.call + @processed.increment + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :async_writer_job) + @processed.increment + end + else + block.call + @processed.increment + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :async_writer_sync_fallback) + @processed.increment + end + end + + def running? + @executor&.running? == true + end + + def pool_size + @executor&.max_length || 0 + end + + def queue_depth + @executor&.queue_length || 0 + end + + def processed_count + @processed.value + end + + private + + def configured_pool_size + return DEFAULT_POOL_SIZE unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :async, :pool_size) || DEFAULT_POOL_SIZE + rescue StandardError + DEFAULT_POOL_SIZE + end + + def configured_queue_size + return DEFAULT_QUEUE_SIZE unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :async, :queue_size) || DEFAULT_QUEUE_SIZE + rescue StandardError + DEFAULT_QUEUE_SIZE + end + + def configured_shutdown_timeout + return DEFAULT_SHUTDOWN_TIMEOUT unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :async, :shutdown_timeout) || DEFAULT_SHUTDOWN_TIMEOUT + rescue StandardError + DEFAULT_SHUTDOWN_TIMEOUT + end + end + end +end +``` + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/async_writer.rb spec/legion/cache/async_writer_spec.rb +git commit -m "add async writer with concurrent-ruby thread pool" +``` + +--- + +### Task 14: Wire AsyncWriter into Cache and Local + +**Files:** +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` +- Test: `spec/legion/cache/async_integration_spec.rb` (new) + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/async_integration_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'async write integration' do + before do + ENV['LEGION_MODE'] = 'lite' + Legion::Cache.setup + end + + after do + Legion::Cache.shutdown + ENV.delete('LEGION_MODE') + end + + it 'set with async: true returns true immediately' do + expect(Legion::Cache.set('async_key', 'val', async: true)).to be(true) + end + + it 'set with async: false writes synchronously' do + Legion::Cache.set('sync_key', 'val', async: false) + expect(Legion::Cache.get('sync_key')).to eq('val') + end + + it 'set with async: true eventually writes the value' do + Legion::Cache.set('eventual', 'val', async: true) + sleep 0.2 + expect(Legion::Cache.get('eventual')).to eq('val') + end + + it 'stats reports async pool size' do + stats = Legion::Cache.stats + expect(stats[:async_pool_size]).to be_a(Integer) + expect(stats[:async_pool_size]).to be > 0 + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/async_integration_spec.rb -v` +Expected: FAIL — async writer not wired in yet. + +**Step 3: Wire in AsyncWriter** + +In `lib/legion/cache.rb`: +- Add `require 'legion/cache/async_writer'` +- Create `@async_writer = Legion::Cache::AsyncWriter.new` in class body +- In `setup`: call `@async_writer.start` +- In `shutdown`: call `@async_writer.stop(timeout: configured_shutdown_timeout)` +- In `set_async`: `@async_writer.enqueue { set_sync(key, value, ttl: ttl) }`; return `true` +- In `delete_async`: `@async_writer.enqueue { delete_sync(key) }`; return `true` +- In `mset_async`: `@async_writer.enqueue { mset_sync(hash, ttl: ttl) }`; return `true` +- Wire stats: `async_writer_pool_size` returns `@async_writer.pool_size`, etc. + +Same for `lib/legion/cache/local.rb` — its own `AsyncWriter` instance. + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/async_integration_spec.rb -v` +Expected: PASS + +**Step 5: Run full suite** + +Run: `bundle exec rspec --tag ~integration -v` +Expected: PASS + +**Step 6: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/async_integration_spec.rb +git commit -m "wire async writer into cache and local tiers" +``` + +--- + +### Task 15: Reconnector + +**Files:** +- Create: `lib/legion/cache/reconnector.rb` +- Test: `spec/legion/cache/reconnector_spec.rb` (new) + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/reconnector_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/reconnector' + +RSpec.describe Legion::Cache::Reconnector do + let(:connect_called) { Concurrent::AtomicFixnum.new(0) } + let(:connect_block) { -> { connect_called.increment; raise 'nope' } } + let(:enabled_block) { -> { true } } + + subject(:reconnector) do + described_class.new( + tier: :shared, + connect_block: connect_block, + enabled_block: enabled_block + ) + end + + after { reconnector.stop } + + describe '#start' do + it 'starts a reconnect loop' do + reconnector.start + expect(reconnector.running?).to be(true) + end + + it 'is idempotent' do + reconnector.start + reconnector.start + expect(reconnector.running?).to be(true) + end + end + + describe '#stop' do + it 'stops the reconnect loop' do + reconnector.start + reconnector.stop + expect(reconnector.running?).to be(false) + end + end + + describe 'exponential backoff' do + it 'attempts reconnection with backoff' do + reconnector.start + sleep 1.5 + reconnector.stop + expect(connect_called.value).to be >= 1 + end + + it 'tracks attempt count' do + reconnector.start + sleep 1.5 + reconnector.stop + expect(reconnector.attempts).to be >= 1 + end + end + + describe 'successful reconnect' do + let(:connect_block) { -> { connect_called.increment } } + + it 'stops after successful reconnect' do + reconnector.start + sleep 1.5 + expect(reconnector.running?).to be(false) + expect(connect_called.value).to eq(1) + end + + it 'resets attempts after success' do + reconnector.start + sleep 1.5 + expect(reconnector.attempts).to eq(0) + end + end + + describe 'respects enabled?' do + let(:enabled_block) { -> { false } } + + it 'does not attempt reconnect when disabled' do + reconnector.start + sleep 1.5 + expect(connect_called.value).to eq(0) + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/reconnector_spec.rb -v` +Expected: FAIL — file doesn't exist. + +**Step 3: Implement Reconnector** + +Create `lib/legion/cache/reconnector.rb`: + +```ruby +# frozen_string_literal: true + +require 'legion/logging/helper' + +module Legion + module Cache + class Reconnector + include Legion::Logging::Helper + + DEFAULT_INITIAL_DELAY = 1 + DEFAULT_MAX_DELAY = 60 + + def initialize(tier:, connect_block:, enabled_block:) + @tier = tier + @connect_block = connect_block + @enabled_block = enabled_block + @attempts = Concurrent::AtomicFixnum.new(0) + @thread = nil + @mutex = Mutex.new + @stop_signal = false + end + + def start + @mutex.synchronize do + return if running? + + @stop_signal = false + @thread = Thread.new { reconnect_loop } + log.info "Legion::Cache::Reconnector[#{@tier}] started" + end + end + + def stop + @mutex.synchronize do + @stop_signal = true + @thread&.join(5) + @thread = nil + log.info "Legion::Cache::Reconnector[#{@tier}] stopped" + end + end + + def running? + @thread&.alive? == true + end + + def attempts + @attempts.value + end + + def next_retry_at + @next_retry_at + end + + private + + def reconnect_loop + delay = configured_initial_delay + + until @stop_signal + unless @enabled_block.call + sleep 1 + next + end + + begin + @next_retry_at = Time.now + delay + sleep delay + return if @stop_signal + + @connect_block.call + @attempts.value = 0 + @next_retry_at = nil + log.info "Legion::Cache::Reconnector[#{@tier}] reconnected after #{@attempts.value} attempts" + return + rescue StandardError => e + @attempts.increment + handle_exception(e, level: :warn, handled: true, + operation: :"reconnector_#{@tier}", + attempt: @attempts.value, next_delay: delay) + delay = [delay * 2, configured_max_delay].min + end + end + rescue StandardError => e + handle_exception(e, level: :error, handled: true, operation: :"reconnector_#{@tier}_loop") + end + + def configured_initial_delay + return DEFAULT_INITIAL_DELAY unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :reconnect, :initial_delay) || DEFAULT_INITIAL_DELAY + rescue StandardError + DEFAULT_INITIAL_DELAY + end + + def configured_max_delay + return DEFAULT_MAX_DELAY unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :reconnect, :max_delay) || DEFAULT_MAX_DELAY + rescue StandardError + DEFAULT_MAX_DELAY + end + end + end +end +``` + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/reconnector_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/reconnector.rb spec/legion/cache/reconnector_spec.rb +git commit -m "add reconnector with exponential backoff" +``` + +--- + +### Task 16: Wire Reconnector into Cache and Local + +**Files:** +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` +- Test: `spec/legion/cache/reconnector_integration_spec.rb` (new) + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/reconnector_integration_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'reconnector integration' do + before do + Legion::Cache.instance_variable_set(:@client, nil) + Legion::Cache.instance_variable_set(:@connected, false) + Legion::Cache.instance_variable_set(:@using_local, false) + Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@active_shared_driver, nil) + Legion::Cache::Local.reset! + Legion::Settings[:cache][:enabled] = true + end + + it 'stats reports reconnect_attempts' do + stats = Legion::Cache.stats + expect(stats[:reconnect_attempts]).to be_a(Integer) + end + + it 'setup failure triggers reconnector when enabled' do + allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'refused') + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + allow(Legion::Cache::Local).to receive(:setup) + + Legion::Cache.setup + + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + expect(reconnector).not_to be_nil + expect(reconnector.running?).to be(true) + + reconnector.stop + end + + it 'does not start reconnector when disabled' do + Legion::Settings[:cache][:enabled] = false + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + allow(Legion::Cache::Local).to receive(:setup) + + Legion::Cache.setup + + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + expect(reconnector).to be_nil + Legion::Settings[:cache][:enabled] = true + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/reconnector_integration_spec.rb -v` +Expected: FAIL + +**Step 3: Wire Reconnector into lifecycle** + +In `lib/legion/cache.rb`: +- Add `require 'legion/cache/reconnector'` +- In `setup_shared` rescue: if `enabled?` and both shared+local fail, create and start a `Reconnector` with a `connect_block` that retries `setup_shared`. +- In `shutdown`: stop the reconnector if running. +- Wire `reconnector_attempts` into `stats`. + +Same pattern in `lib/legion/cache/local.rb`. + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/reconnector_integration_spec.rb -v` +Expected: PASS + +**Step 5: Run full suite** + +Run: `bundle exec rspec --tag ~integration -v` +Expected: PASS + +**Step 6: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/reconnector_integration_spec.rb +git commit -m "wire reconnector into cache lifecycle" +``` + +--- + +### Task 17: Update Helper module for new signatures + +**Files:** +- Modify: `lib/legion/cache/helper.rb` +- Test: `spec/legion/cache/helper_spec.rb` + +**Step 1: Read existing helper spec to understand current tests** + +Read `spec/legion/cache/helper_spec.rb` and update stubs for new keyword signatures. + +**Step 2: Update Helper methods** + +In `lib/legion/cache/helper.rb`: +- `cache_set` calls `Legion::Cache.set(key, value, ttl: ttl, async: async, phi: phi)` +- `cache_fetch` calls `Legion::Cache.fetch(key, ttl: ttl, &block)` +- `local_cache_set` calls `Legion::Cache::Local.set(key, value, ttl: ttl, async: async, phi: phi)` +- `local_cache_fetch` calls `Legion::Cache::Local.fetch(key, ttl: ttl, &block)` +- Add `async:` parameter to `cache_set`, `cache_delete`, `cache_mset`, `local_cache_set`, `local_cache_delete`, `local_cache_mset` — defaults to `true` (inherits from the underlying methods). +- Update `FALLBACK_TTL` to `3600`. + +**Step 3: Run helper specs** + +Run: `bundle exec rspec spec/legion/cache/helper_spec.rb -v` +Expected: PASS + +**Step 4: Commit** + +```bash +git add lib/legion/cache/helper.rb spec/legion/cache/helper_spec.rb +git commit -m "update helper module for new cache signatures" +``` + +--- + +### Task 18: Update Cacheable module for new signatures + +**Files:** +- Modify: `lib/legion/cache/cacheable.rb` +- Test: `spec/legion/cacheable_spec.rb` + +**Step 1: Update Cacheable** + +In `lib/legion/cache/cacheable.rb`: +- `cache_write` calls `Legion::Cache.set(key, value, ttl: ttl)` (keyword TTL) +- `local_cache_write` calls `Legion::Cache::Local.set(key, value, ttl: ttl)` (keyword TTL) + +**Step 2: Run cacheable specs** + +Run: `bundle exec rspec spec/legion/cacheable_spec.rb -v` +Expected: PASS + +**Step 3: Commit** + +```bash +git add lib/legion/cache/cacheable.rb spec/legion/cacheable_spec.rb +git commit -m "update cacheable module for keyword ttl" +``` + +--- + +### Task 19: Update Settings with new async and reconnect defaults + +**Files:** +- Modify: `lib/legion/cache/settings.rb` +- Test: `spec/legion/settings_spec.rb` + +**Step 1: Write the failing test** + +Add to `spec/legion/settings_spec.rb`: + +```ruby +describe 'async settings' do + it 'includes async defaults' do + expect(Legion::Cache::Settings.default[:async]).to include( + pool_size: 4, + queue_size: 1000, + shutdown_timeout: 5 + ) + end +end + +describe 'reconnect settings' do + it 'includes reconnect defaults' do + expect(Legion::Cache::Settings.default[:reconnect]).to include( + initial_delay: 1, + max_delay: 60, + enabled: true + ) + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/settings_spec.rb -v` +Expected: FAIL + +**Step 3: Add defaults to settings** + +In `lib/legion/cache/settings.rb`, add to `self.default`: +```ruby +async: { + pool_size: 4, + queue_size: 1000, + shutdown_timeout: 5 +}.freeze, +reconnect: { + initial_delay: 1, + max_delay: 60, + enabled: true +}.freeze +``` + +Add same to `self.local` (can use smaller pool_size: 2 for local). + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/settings_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/settings.rb spec/legion/settings_spec.rb +git commit -m "add async and reconnect default settings" +``` + +--- + +### Task 20: Full suite validation and version bump + +**Files:** +- Modify: `lib/legion/cache/version.rb`, `CHANGELOG.md` + +**Step 1: Run full test suite** + +Run: `bundle exec rspec -v` +Expected: All unit specs PASS (integration specs skipped unless servers are running). + +**Step 2: Run rubocop** + +Run: `bundle exec rubocop -A` +Then: `bundle exec rubocop` +Expected: Zero offenses. + +**Step 3: Bump version** + +In `lib/legion/cache/version.rb`, bump to `1.4.0` (this is a minor version bump due to new features: async writes, reconnector, stats, enabled?). + +**Step 4: Update CHANGELOG.md** + +```markdown +## [1.4.0] - 2026-04-06 + +### Added +- Async write support (`async: true` default) via concurrent-ruby ThreadPoolExecutor +- Background reconnector with exponential backoff (1s to 60s) +- `enabled?` method for both shared and local tiers (config-driven) +- `stats` method returning frozen Hash with pool, async, reconnect, and server info +- Transparent JSON serialization for Redis driver (prefix-byte based) +- `mget`/`mset` support on Local tier + +### Changed +- TTL is now keyword-only (`ttl:`) across all drivers and tiers +- Default TTL: global 3600s (1 hour), local 21600s (6 hours) +- All exception handling unified: reads return nil, sync writes re-raise, lifecycle handles internally +- Redis driver catches StandardError instead of Redis::BaseError for consistency +- Removed `flush(delay)` — flush takes no arguments +- Normalized `client` kwargs across Memcached and Redis drivers +- All logging uses `log` via Legion::Logging::Helper consistently + +### Fixed +- Memcached `get` nil-check bug (checked result[0] before result.nil?) +- Memcached `fetch` same nil-check bug +- Local `fetch` same nil-check/JSON-dump bug +``` + +**Step 5: Commit** + +```bash +git add lib/legion/cache/version.rb CHANGELOG.md +git commit -m "bump version to 1.4.0, update changelog" +``` + +**Step 6: Final validation** + +Run: `bundle exec rspec -v && bundle exec rubocop` +Expected: All green. From 4ce8998501adaea0ebb81c7ff2795815856545aa Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:42:11 -0500 Subject: [PATCH 077/108] update default TTL to 3600 global, 21600 local --- lib/legion/cache/settings.rb | 4 ++-- spec/legion/settings_spec.rb | 10 ++++++++++ 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 2d91fd3..5167496 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -31,7 +31,7 @@ def self.default cache_nils: false, pool_size: 10, timeout: 5, - default_ttl: 60, + default_ttl: 3600, serializer: Legion::JSON, cluster: nil, replica: false, @@ -57,7 +57,7 @@ def self.local cache_nils: false, pool_size: 5, timeout: 3, - default_ttl: 60, + default_ttl: 21_600, serializer: Legion::JSON, username: nil, password: nil, diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index da780a2..60dce92 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -65,6 +65,16 @@ end end + describe 'default TTL values' do + it 'has global default_ttl of 3600' do + expect(Legion::Cache::Settings.default[:default_ttl]).to eq(3600) + end + + it 'has local default_ttl of 21600' do + expect(Legion::Cache::Settings.local[:default_ttl]).to eq(21_600) + end + end + describe '.local' do subject(:locals) { described_class.local } From cf024ba369f75135cd6e059e006e4b73c0e80acb Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:44:09 -0500 Subject: [PATCH 078/108] unify memcached driver method signatures --- lib/legion/cache/memcached.rb | 92 ++++++++++++++++++++--------------- spec/legion/memcached_spec.rb | 25 ++++++++++ 2 files changed, 77 insertions(+), 40 deletions(-) diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index cb17448..f7c4c98 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -12,34 +12,37 @@ module Memcached extend self extend Legion::Logging::Helper - def client(server: nil, servers: nil, logger: nil, **opts) + def client(server: nil, servers: nil, pool_size: nil, timeout: nil, + username: nil, password: nil, logger: nil, **opts) return @client unless @client.nil? settings = defined?(Legion::Settings) ? Legion::Settings[:cache] : {} servers ||= settings[:servers] || [] @component_logger = logger || log - @pool_size = opts.key?(:pool_size) ? opts[:pool_size] : settings[:pool_size] || 10 - @timeout = opts.key?(:timeout) ? opts[:timeout] : settings[:timeout] || 5 + @pool_size = pool_size || settings[:pool_size] || 10 + @timeout = timeout || settings[:timeout] || 5 resolved = Legion::Cache::Settings.resolve_servers( driver: 'memcached', server: server, servers: Array(servers) ) - Dalli.logger = shared_dalli_logger + Dalli.logger = log cache_opts = settings.merge(opts) cache_opts[:value_max_bytes] ||= 8 * 1024 * 1024 cache_opts[:serializer] ||= Legion::JSON + cache_opts[:username] = username unless username.nil? + cache_opts[:password] = password unless password.nil? tls_ctx = memcached_tls_context(port: resolved.first.split(':').last.to_i) cache_opts[:ssl_context] = tls_ctx if tls_ctx - @client = ConnectionPool.new(size: pool_size, timeout: timeout) do + @client = ConnectionPool.new(size: pool_size, timeout: self.timeout) do Dalli::Client.new(resolved, cache_opts) end @connected = true - cache_logger.info "Memcached connected to #{resolved.join(', ')}" + log.info "Memcached connected to #{resolved.join(', ')}" @client rescue StandardError => e handle_exception(e, level: :error, handled: false, operation: :memcached_client, @@ -50,14 +53,14 @@ def client(server: nil, servers: nil, logger: nil, **opts) def get(key) result = client.with { |conn| conn.get(key) } - cache_logger.debug "[cache] GET #{key} hit=#{!result.nil?}" + log.debug { "[cache] GET #{key} hit=#{!result.nil?}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :memcached_get, key: key) - raise + handle_exception(e, level: :warn, handled: true, operation: :memcached_get, key: key) + nil end - def fetch(key, ttl = nil, &) + def fetch(key, ttl: nil, &) result = client.with do |conn| if block_given? conn.fetch(key, ttl, &) @@ -65,38 +68,47 @@ def fetch(key, ttl = nil, &) conn.fetch(key, ttl) end end - cache_logger.debug "[cache] FETCH #{key} hit=#{!result.nil?}" + log.debug { "[cache] FETCH #{key} hit=#{!result.nil?}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :memcached_fetch, key: key, ttl: ttl) - raise + handle_exception(e, level: :warn, handled: true, operation: :memcached_fetch, key: key, ttl: ttl) + nil + end + + def set(key, value, ttl: nil, **opts) + set_sync(key, value, ttl: ttl, **opts) end - def set(key, value, ttl = 180) - result = client.with { |conn| conn.set(key, value, ttl).positive? } - cache_logger.debug "[cache] SET #{key} ttl=#{ttl} success=#{result} value_class=#{value.class}" + def set_sync(key, value, ttl: nil, **) + effective_ttl = ttl || default_ttl + result = client.with { |conn| conn.set(key, value, effective_ttl).positive? } + log.debug { "[cache] SET #{key} ttl=#{effective_ttl} success=#{result} value_class=#{value.class}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :memcached_set, key: key, ttl: ttl) + handle_exception(e, level: :error, handled: false, operation: :memcached_set_sync, key: key, ttl: effective_ttl) raise end - def delete(key) + def delete(key, **) + delete_sync(key) + end + + def delete_sync(key) result = client.with { |conn| conn.delete(key) == true } - cache_logger.debug "[cache] DELETE #{key} success=#{result}" + log.debug { "[cache] DELETE #{key} success=#{result}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :memcached_delete, key: key) + handle_exception(e, level: :error, handled: false, operation: :memcached_delete_sync, key: key) raise end - def flush(delay = 0) - result = client.with { |conn| conn.flush(delay).first } - cache_logger.debug '[cache] FLUSH completed' + def flush + result = client.with { |conn| conn.flush.first } + log.debug { '[cache] FLUSH completed' } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :memcached_flush, delay: delay) - raise + handle_exception(e, level: :warn, handled: true, operation: :memcached_flush) + nil end def mget(*keys) @@ -104,36 +116,36 @@ def mget(*keys) return {} if keys.empty? result = client.with { |conn| conn.get_multi(*keys) } - cache_logger.debug "[cache] MGET keys=#{keys.size} hits=#{result.size}" + log.debug { "[cache] MGET keys=#{keys.size} hits=#{result.size}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :memcached_mget, key_count: keys.size) - raise + handle_exception(e, level: :warn, handled: true, operation: :memcached_mget, key_count: keys.size) + {} + end + + def mset(hash, ttl: nil, **) + mset_sync(hash, ttl: ttl) end - def mset(hash) + def mset_sync(hash, ttl: nil, **) return true if hash.empty? client.with { |conn| conn.set_multi(hash) } - cache_logger.debug "[cache] MSET keys=#{hash.size}" + log.debug { "[cache] MSET keys=#{hash.size}" } true rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :memcached_mset, key_count: hash.size) + handle_exception(e, level: :error, handled: false, operation: :memcached_mset_sync, key_count: hash.size) raise end private - def cache_logger - @component_logger || log - end + def default_ttl + return 3600 unless defined?(Legion::Settings) - def shared_dalli_logger - if defined?(Legion::Cache) && Legion::Cache.respond_to?(:log) - Legion::Cache.log - else - cache_logger - end + Legion::Settings.dig(:cache, :default_ttl) || 3600 + rescue StandardError + 3600 end def memcached_tls_context(port:) diff --git a/spec/legion/memcached_spec.rb b/spec/legion/memcached_spec.rb index 01212fe..41fd8d1 100644 --- a/spec/legion/memcached_spec.rb +++ b/spec/legion/memcached_spec.rb @@ -3,6 +3,31 @@ require 'spec_helper' require 'legion/cache/memcached' +RSpec.describe Legion::Cache::Memcached do + describe 'method signatures' do + it 'set accepts keyword ttl' do + cache = described_class.dup + pool = instance_double(ConnectionPool) + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + + dalli = instance_double(Dalli::Client) + allow(pool).to receive(:with).and_yield(dalli) + allow(dalli).to receive(:set).and_return(1) + + expect { cache.set('k', 'v', ttl: 120) }.not_to raise_error + end + + it 'flush takes no arguments' do + expect(described_class.method(:flush).arity).to eq(0) + end + + it 'uses log instead of cache_logger' do + expect(described_class.private_method_defined?(:cache_logger)).to be(false) + end + end +end + RSpec.describe Legion::Cache::Memcached, :integration do before(:all) do @cache = Legion::Cache::Memcached From ffcfb35a14b486f46b99f7dd23824c500742eebd Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:45:36 -0500 Subject: [PATCH 079/108] unify redis driver method signatures --- lib/legion/cache/redis.rb | 96 ++++++++++++++++++++++++--------------- spec/legion/redis_spec.rb | 38 ++++++++++++++++ 2 files changed, 97 insertions(+), 37 deletions(-) diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 108f756..694c068 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -13,11 +13,20 @@ module Redis extend self extend Legion::Logging::Helper - def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, replica: false, # rubocop:disable Metrics/ParameterLists - logger: nil, - fixed_hostname: nil, username: nil, password: nil, db: nil, reconnect_attempts: [0, 0.5, 1], **) + def client(server: nil, servers: [], pool_size: nil, timeout: nil, + username: nil, password: nil, logger: nil, **opts) return @client unless @client.nil? + settings = defined?(Legion::Settings) ? Legion::Settings[:cache] : {} + pool_size ||= settings[:pool_size] || 20 + timeout ||= settings[:timeout] || 5 + + cluster = opts.delete(:cluster) + replica = opts.delete(:replica) || false + fixed_hostname = opts.delete(:fixed_hostname) + db = opts.delete(:db) + reconnect_attempts = opts.delete(:reconnect_attempts) || [0, 0.5, 1] + @pool_size = pool_size @timeout = timeout @cluster_mode = Array(cluster).compact.any? @@ -30,7 +39,7 @@ def client(pool_size: 20, timeout: 5, server: nil, servers: [], cluster: nil, re reconnect_attempts: reconnect_attempts) end @connected = true - cache_logger.info "Redis connected to #{resolved_redis_address(server: server, servers: servers, cluster: cluster)}" + log.info "Redis connected to #{resolved_redis_address(server: server, servers: servers, cluster: cluster)}" @client rescue StandardError => e handle_exception(e, level: :error, handled: false, operation: :redis_client, @@ -70,39 +79,48 @@ def cluster_mode? def get(key) result = client.with { |conn| conn.get(key) } - cache_logger.debug "[cache] GET #{key} hit=#{!result.nil?}" + log.debug { "[cache] GET #{key} hit=#{!result.nil?}" } result - rescue ::Redis::BaseError => e - log_cluster_error('redis_get', e, key: key) - raise + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :redis_get, key: key) + nil end - def fetch(key, ttl = nil) + def fetch(key, ttl: nil) result = get(key) return result unless result.nil? && block_given? result = yield - set(key, result, ttl) + set(key, result, ttl: ttl) result end - def set(key, value, ttl = nil) + def set(key, value, ttl: nil, **opts) + set_sync(key, value, ttl: ttl, **opts) + end + + def set_sync(key, value, ttl: nil, **) + effective_ttl = ttl || default_ttl args = {} - args[:ex] = ttl unless ttl.nil? + args[:ex] = effective_ttl unless effective_ttl.nil? result = client.with { |conn| conn.set(key, value, **args) == 'OK' } - cache_logger.debug "[cache] SET #{key} ttl=#{ttl.inspect} success=#{result}" + log.debug { "[cache] SET #{key} ttl=#{effective_ttl.inspect} success=#{result}" } result - rescue ::Redis::BaseError => e - log_cluster_error('redis_set', e, key: key, ttl: ttl) + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :redis_set_sync, key: key, ttl: effective_ttl) raise end - def delete(key) + def delete(key, **) + delete_sync(key) + end + + def delete_sync(key) result = client.with { |conn| conn.del(key) == 1 } - cache_logger.debug "[cache] DELETE #{key} success=#{result}" + log.debug { "[cache] DELETE #{key} success=#{result}" } result - rescue ::Redis::BaseError => e - log_cluster_error('redis_delete', e, key: key) + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :redis_delete_sync, key: key) raise end @@ -114,11 +132,11 @@ def flush conn.flushdb == 'OK' end end - cache_logger.debug '[cache] FLUSH completed' + log.debug { '[cache] FLUSH completed' } result - rescue ::Redis::BaseError => e - log_cluster_error('redis_flush', e) - raise + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :redis_flush) + nil end def mget(*keys) @@ -133,14 +151,18 @@ def mget(*keys) keys.zip(values).to_h end end - cache_logger.debug "[cache] MGET keys=#{keys.size}" + log.debug { "[cache] MGET keys=#{keys.size}" } result - rescue ::Redis::BaseError => e - log_cluster_error('redis_mget', e, key_count: keys.size) - raise + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :redis_mget, key_count: keys.size) + {} + end + + def mset(hash, ttl: nil, **) + mset_sync(hash, ttl: ttl) end - def mset(hash) + def mset_sync(hash, ttl: nil, **) return true if hash.empty? result = client.with do |conn| @@ -150,17 +172,21 @@ def mset(hash) conn.mset(*hash.flatten) == 'OK' end end - cache_logger.debug "[cache] MSET keys=#{hash.size}" + log.debug { "[cache] MSET keys=#{hash.size}" } result - rescue ::Redis::BaseError => e - log_cluster_error('redis_mset', e, key_count: hash.size) + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :redis_mset_sync, key_count: hash.size) raise end private - def cache_logger - @component_logger || log + def default_ttl + return 3600 unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :default_ttl) || 3600 + rescue StandardError + 3600 end def cluster_mget(conn, keys) @@ -215,10 +241,6 @@ def resolved_redis_address(server:, servers:, cluster:) 'unknown' end - def log_cluster_error(operation, error, **) - handle_exception(error, level: :warn, handled: false, operation: operation, **) - end - def redis_tls_options(port:) return {} unless defined?(Legion::Crypt::TLS) diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index c8bb0c3..054eac4 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -3,6 +3,44 @@ require 'spec_helper' require 'legion/cache/redis' +RSpec.describe Legion::Cache::Redis do + describe 'method signatures' do + it 'set accepts keyword ttl' do + cache = described_class.dup + pool = instance_double(ConnectionPool) + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + + redis = instance_double(Redis) + allow(pool).to receive(:with).and_yield(redis) + allow(redis).to receive(:set).and_return('OK') + + expect { cache.set('k', 'v', ttl: 120) }.not_to raise_error + end + + it 'fetch accepts keyword ttl' do + cache = described_class.dup + pool = instance_double(ConnectionPool) + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + + redis = instance_double(Redis) + allow(pool).to receive(:with).and_yield(redis) + allow(redis).to receive(:get).and_return('val') + + expect { cache.fetch('k', ttl: 60) }.not_to raise_error + end + + it 'flush takes no arguments' do + expect(described_class.method(:flush).arity).to eq(0) + end + + it 'uses log instead of cache_logger' do + expect(described_class.private_method_defined?(:cache_logger)).to be(false) + end + end +end + RSpec.describe Legion::Cache::Redis, :integration do before(:all) do @cache = Legion::Cache::Redis From 6db3a0bdd69d906e6baeb5290cf4c22099422bf1 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:52:06 -0500 Subject: [PATCH 080/108] unify memory adapter method signatures --- lib/legion/cache/memory.rb | 41 +++++++++++++++++++++++++------- spec/legion/cache/memory_spec.rb | 24 +++++++++++++++++-- 2 files changed, 55 insertions(+), 10 deletions(-) diff --git a/lib/legion/cache/memory.rb b/lib/legion/cache/memory.rb index 615fb7b..12b2870 100644 --- a/lib/legion/cache/memory.rb +++ b/lib/legion/cache/memory.rb @@ -32,47 +32,68 @@ def get(key) log.debug { "[cache:memory] GET #{key} hit=#{!result.nil?}" } result end + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :memory_get, key: key) + nil end - def set(key, value, ttl = nil) + def set(key, value, ttl: nil, **) + set_sync(key, value, ttl: ttl) + end + + def set_sync(key, value, ttl: nil, **) + effective_ttl = ttl || default_ttl @mutex.synchronize do @store[key] = value - if ttl&.positive? - @expiry[key] = Time.now + ttl + if effective_ttl&.positive? + @expiry[key] = Time.now + effective_ttl else @expiry.delete(key) end - log.debug { "[cache:memory] SET #{key} ttl=#{ttl.inspect}" } + log.debug { "[cache:memory] SET #{key} ttl=#{effective_ttl.inspect}" } value end + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :memory_set_sync, key: key) + raise end - def fetch(key, ttl = nil) + def fetch(key, ttl: nil) val = get(key) return val unless val.nil? log.debug { "[cache:memory] FETCH #{key} miss=true" } val = yield if block_given? - set(key, val, ttl) + set(key, val, ttl: ttl) val end - def delete(key) + def delete(key, **) + delete_sync(key) + end + + def delete_sync(key) @mutex.synchronize do removed = @store.delete(key) @expiry.delete(key) log.debug { "[cache:memory] DELETE #{key} success=#{!removed.nil?}" } removed end + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :memory_delete_sync, key: key) + raise end - def flush(_delay = 0) + def flush result = @mutex.synchronize do @store.clear @expiry.clear end log.info 'Legion::Cache::Memory flushed' result + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :memory_flush) + nil end def close = nil @@ -97,6 +118,10 @@ def reset! def size = 1 def available = 1 + def default_ttl + 3600 + end + private def expire_if_needed(key) diff --git a/spec/legion/cache/memory_spec.rb b/spec/legion/cache/memory_spec.rb index 8074bcb..c37dea8 100644 --- a/spec/legion/cache/memory_spec.rb +++ b/spec/legion/cache/memory_spec.rb @@ -17,13 +17,13 @@ end it 'expires values after TTL' do - described_class.set('expire-me', 'data', 0.1) + described_class.set('expire-me', 'data', ttl: 0.1) sleep 0.15 expect(described_class.get('expire-me')).to be_nil end it 'clears stale expiry when a key is rewritten without TTL' do - described_class.set('refresh-me', 'old', 0.05) + described_class.set('refresh-me', 'old', ttl: 0.05) described_class.set('refresh-me', 'new') sleep 0.06 @@ -78,6 +78,26 @@ end end + describe 'keyword ttl' do + before { described_class.setup } + + it 'accepts ttl as keyword arg on set' do + described_class.set('kw', 'val', ttl: 300) + expect(described_class.get('kw')).to eq('val') + end + + it 'accepts ttl as keyword arg on fetch' do + result = described_class.fetch('fkw', ttl: 300) { 'fetched' } + expect(result).to eq('fetched') + end + end + + describe 'flush takes no arguments' do + it 'has arity 0' do + expect(described_class.method(:flush).arity).to eq(0) + end + end + describe 'thread safety' do it 'handles concurrent reads and writes' do described_class.setup From ba2769a2d99a1bd43ece18bf780742bf26b7936b Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:53:16 -0500 Subject: [PATCH 081/108] unify local tier method signatures --- lib/legion/cache/local.rb | 82 +++++++++++++++++++++++++++++---------- spec/legion/local_spec.rb | 18 +++++++++ 2 files changed, 79 insertions(+), 21 deletions(-) diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index 390f5ce..ba2328f 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -37,6 +37,15 @@ def shutdown @connected = false end + def enabled? + return true unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache_local, :enabled) != false + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_local_enabled) + true + end + def connected? @connected == true end @@ -47,47 +56,70 @@ def driver_name def get(key) result = @driver.get(key) - log.debug "[cache:local] GET #{key} hit=#{!result.nil?}" + log.debug { "[cache:local] GET #{key} hit=#{!result.nil?}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :cache_local_get, key: key) - raise + handle_exception(e, level: :warn, handled: true, operation: :cache_local_get, key: key) + nil end - def set(key, value, ttl = 180) - result = @driver.set(key, value, ttl) - log.debug "[cache:local] SET #{key} ttl=#{ttl} success=#{result}" + def set(key, value, ttl: nil, **opts) + set_sync(key, value, ttl: ttl, **opts) + end + + def set_sync(key, value, ttl: nil, **) + effective_ttl = ttl || local_default_ttl + result = @driver.set_sync(key, value, ttl: effective_ttl) + log.debug { "[cache:local] SET #{key} ttl=#{effective_ttl} success=#{result}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :cache_local_set, key: key, ttl: ttl) + handle_exception(e, level: :error, handled: false, operation: :cache_local_set_sync, key: key, ttl: effective_ttl) raise end - def fetch(key, ttl = nil, &) - result = @driver.fetch(key, ttl, &) - log.debug "[cache:local] FETCH #{key} hit=#{!result.nil?}" + def fetch(key, ttl: nil, &) + result = @driver.fetch(key, ttl: ttl, &) + log.debug { "[cache:local] FETCH #{key} hit=#{!result.nil?}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :cache_local_fetch, key: key, ttl: ttl) - raise + handle_exception(e, level: :warn, handled: true, operation: :cache_local_fetch, key: key, ttl: ttl) + nil + end + + def delete(key, **) + delete_sync(key) end - def delete(key) - result = @driver.delete(key) - log.debug "[cache:local] DELETE #{key} success=#{result}" + def delete_sync(key) + result = @driver.delete_sync(key) + log.debug { "[cache:local] DELETE #{key} success=#{result}" } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :cache_local_delete, key: key) + handle_exception(e, level: :error, handled: false, operation: :cache_local_delete_sync, key: key) raise end - def flush(delay = 0) - result = @driver.flush(delay) - log.debug '[cache:local] FLUSH completed' + def flush + result = @driver.flush + log.debug { '[cache:local] FLUSH completed' } result rescue StandardError => e - handle_exception(e, level: :warn, handled: false, operation: :cache_local_flush, delay: delay) - raise + handle_exception(e, level: :warn, handled: true, operation: :cache_local_flush) + nil + end + + def mget(*keys) + keys = keys.flatten + return {} if keys.empty? + + keys.to_h { |key| [key, get(key)] } + end + + def mset(hash, ttl: nil, **) + return true if hash.empty? + + hash.each { |key, value| set(key, value, ttl: ttl) } + true end def client @@ -137,6 +169,14 @@ def reset! private + def local_default_ttl + return 21_600 unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache_local, :default_ttl) || 21_600 + rescue StandardError + 21_600 + end + def build_driver(driver_name) case Legion::Cache::Settings.normalize_driver(driver_name) when 'redis' diff --git a/spec/legion/local_spec.rb b/spec/legion/local_spec.rb index 9d09211..780d575 100644 --- a/spec/legion/local_spec.rb +++ b/spec/legion/local_spec.rb @@ -71,6 +71,24 @@ end end + describe 'method signatures' do + it 'responds to enabled?' do + expect(described_class).to respond_to(:enabled?) + end + + it 'set accepts keyword ttl' do + driver = double('driver') + allow(driver).to receive(:set_sync) + described_class.instance_variable_set(:@driver, driver) + described_class.instance_variable_set(:@connected, true) + expect { described_class.set('k', 'v', ttl: 120) }.not_to raise_error + end + + it 'flush takes no arguments' do + expect(described_class.method(:flush).arity).to eq(0) + end + end + describe 'not connected' do before { described_class.reset! } From 5f14e03d72d342bddd24a44fbbbfa1f17d09ab81 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:55:06 -0500 Subject: [PATCH 082/108] unify top-level cache method signatures --- lib/legion/cache.rb | 92 +++++++++++++++++++++-------- spec/legion/cache_fallback_spec.rb | 17 ++++-- spec/legion/cache_interface_spec.rb | 21 +++++++ spec/legion/cache_spec.rb | 10 ++-- 4 files changed, 105 insertions(+), 35 deletions(-) diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 5920767..870c905 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -19,6 +19,15 @@ module Cache class << self include Legion::Logging::Helper + def enabled? + return true unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :enabled) != false + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_enabled) + true + end + def connected? @connected == true end @@ -103,6 +112,9 @@ def get(key) configure_shared_adapter! super + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_get, key: key) + nil end def phi_max_ttl @@ -121,35 +133,50 @@ def enforce_phi_ttl(ttl, phi: false, **) [ttl, max].min end - def set(key, value, ttl = nil, **opts) - ttl = opts.delete(:ttl) || ttl || 180 - effective_ttl = enforce_phi_ttl(ttl, **opts) - return Legion::Cache::Memory.set(key, value, effective_ttl) if @using_memory - return Legion::Cache::Local.set(key, value, effective_ttl) if @using_local + def set(key, value, ttl: nil, async: true, phi: false) + effective_ttl = resolve_ttl(ttl, phi: phi) + return Legion::Cache::Memory.set(key, value, ttl: effective_ttl) if @using_memory + return Legion::Cache::Local.set(key, value, ttl: effective_ttl) if @using_local configure_shared_adapter! - super(key, value, effective_ttl) + set_sync(key, value, ttl: effective_ttl) end - def fetch(key, ttl = nil, &) - return Legion::Cache::Memory.fetch(key, ttl, &) if @using_memory - return Legion::Cache::Local.fetch(key, ttl, &) if @using_local + def set_sync(key, value, ttl: nil, **) + return Legion::Cache::Memory.set_sync(key, value, ttl: ttl) if @using_memory + return Legion::Cache::Local.set_sync(key, value, ttl: ttl) if @using_local configure_shared_adapter! super end - def delete(key) + def fetch(key, ttl: nil, &) + return Legion::Cache::Memory.fetch(key, ttl: ttl, &) if @using_memory + return Legion::Cache::Local.fetch(key, ttl: ttl, &) if @using_local + + configure_shared_adapter! + super + end + + def delete(key, async: true) return Legion::Cache::Memory.delete(key) if @using_memory return Legion::Cache::Local.delete(key) if @using_local + configure_shared_adapter! + delete_sync(key) + end + + def delete_sync(key) + return Legion::Cache::Memory.delete_sync(key) if @using_memory + return Legion::Cache::Local.delete_sync(key) if @using_local + configure_shared_adapter! super end - def flush(delay = 0) - return Legion::Cache::Memory.flush(delay) if @using_memory - return Legion::Cache::Local.flush(delay) if @using_local + def flush + return Legion::Cache::Memory.flush if @using_memory + return Legion::Cache::Local.flush if @using_local configure_shared_adapter! super @@ -159,16 +186,25 @@ def mget(*keys) keys = keys.flatten return {} if keys.empty? return keys.to_h { |key| [key, Legion::Cache::Memory.get(key)] } if @using_memory - return local_mget(*keys) if @using_local + return Legion::Cache::Local.mget(*keys) if @using_local configure_shared_adapter! super end - def mset(hash) + def mset(hash, ttl: nil, async: true) return true if hash.empty? - return hash.each { |key, value| Legion::Cache::Memory.set(key, value) } && true if @using_memory - return local_mset(hash) if @using_local + return hash.each { |key, value| Legion::Cache::Memory.set(key, value, ttl: ttl) } && true if @using_memory + return Legion::Cache::Local.mset(hash, ttl: ttl) if @using_local + + configure_shared_adapter! + mset_sync(hash, ttl: ttl) + end + + def mset_sync(hash, ttl: nil, **) + return true if hash.empty? + return hash.each { |key, value| Legion::Cache::Memory.set_sync(key, value, ttl: ttl) } && true if @using_memory + return Legion::Cache::Local.mset(hash, ttl: ttl) if @using_local configure_shared_adapter! super @@ -244,6 +280,19 @@ def timeout private + def resolve_ttl(ttl, phi: false) + effective = ttl || default_ttl + enforce_phi_ttl(effective, phi: phi) + end + + def default_ttl + return 3600 unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :default_ttl) || 3600 + rescue StandardError + 3600 + end + def setup_local return if Legion::Cache::Local.connected? @@ -319,15 +368,6 @@ def close_existing_shared_client @client = nil @connected = false end - - def local_mget(*keys) - keys.to_h { |key| [key, Legion::Cache::Local.get(key)] } - end - - def local_mset(hash) - hash.each { |key, value| Legion::Cache::Local.set(key, value) } - true - end end end end diff --git a/spec/legion/cache_fallback_spec.rb b/spec/legion/cache_fallback_spec.rb index fb5c52f..d937485 100644 --- a/spec/legion/cache_fallback_spec.rb +++ b/spec/legion/cache_fallback_spec.rb @@ -18,21 +18,28 @@ allow(Legion::Cache::Local).to receive(:shutdown).and_return(false) allow(Legion::Cache::Local).to receive(:close).and_return(false) allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } - allow(Legion::Cache::Local).to receive(:set) do |key, value, _ttl| + allow(Legion::Cache::Local).to receive(:set) do |key, value, ttl: nil, **| local_store[key] = value true end - allow(Legion::Cache::Local).to receive(:delete) do |key| + allow(Legion::Cache::Local).to receive(:set_sync) do |key, value, ttl: nil, **| + local_store[key] = value + true + end + allow(Legion::Cache::Local).to receive(:delete) do |key, **| + !local_store.delete(key).nil? + end + allow(Legion::Cache::Local).to receive(:delete_sync) do |key| !local_store.delete(key).nil? end - allow(Legion::Cache::Local).to receive(:fetch) do |key, _ttl, &block| + allow(Legion::Cache::Local).to receive(:fetch) do |key, ttl: nil, &block| next local_store[key] if local_store.key?(key) value = block.call local_store[key] = value value end - allow(Legion::Cache::Local).to receive(:flush) do |_delay = 0| + allow(Legion::Cache::Local).to receive(:flush) do local_store.clear true end @@ -72,7 +79,7 @@ Legion::Cache.setup fetch_block = proc { 'fetchval' } - expect(Legion::Cache.fetch('fetch_test', 60, &fetch_block)).to eq('fetchval') + expect(Legion::Cache.fetch('fetch_test', ttl: 60, &fetch_block)).to eq('fetchval') expect(Legion::Cache.fetch('fetch_test')).to eq('fetchval') end diff --git a/spec/legion/cache_interface_spec.rb b/spec/legion/cache_interface_spec.rb index b36bb53..535a8e0 100644 --- a/spec/legion/cache_interface_spec.rb +++ b/spec/legion/cache_interface_spec.rb @@ -63,4 +63,25 @@ it 'has fetch method' do expect(Legion::Cache.method(:fetch)).to be_a(Method) end + + it 'set accepts keyword ttl and async' do + params = Legion::Cache.method(:set).parameters + names = params.map(&:last) + expect(names).to include(:ttl) + expect(names).to include(:async) + end + + it 'delete accepts keyword async' do + params = Legion::Cache.method(:delete).parameters + names = params.map(&:last) + expect(names).to include(:async) + end + + it 'flush takes no arguments' do + expect(Legion::Cache.method(:flush).arity).to eq(0) + end + + it 'responds to enabled?' do + expect(Legion::Cache).to respond_to(:enabled?) + end end diff --git a/spec/legion/cache_spec.rb b/spec/legion/cache_spec.rb index 01a44b1..9d4c349 100644 --- a/spec/legion/cache_spec.rb +++ b/spec/legion/cache_spec.rb @@ -48,28 +48,30 @@ describe '.fetch' do it 'forwards blocks to the memory adapter' do described_class.instance_variable_set(:@using_memory, true) + described_class.instance_variable_set(:@connected, true) fetch_block = proc { 'computed' } - expect(Legion::Cache::Memory).to receive(:fetch) do |key, ttl, &block| + expect(Legion::Cache::Memory).to receive(:fetch) do |key, ttl: nil, &block| expect(key).to eq('cache.key') expect(ttl).to eq(60) block.call end.and_return('computed') - expect(described_class.fetch('cache.key', 60, &fetch_block)).to eq('computed') + expect(described_class.fetch('cache.key', ttl: 60, &fetch_block)).to eq('computed') end it 'forwards blocks to the local adapter' do described_class.instance_variable_set(:@using_local, true) + described_class.instance_variable_set(:@connected, true) fetch_block = proc { 'local-computed' } - expect(Legion::Cache::Local).to receive(:fetch) do |key, ttl, &block| + expect(Legion::Cache::Local).to receive(:fetch) do |key, ttl: nil, &block| expect(key).to eq('cache.key') expect(ttl).to eq(90) block.call end.and_return('local-computed') - expect(described_class.fetch('cache.key', 90, &fetch_block)).to eq('local-computed') + expect(described_class.fetch('cache.key', ttl: 90, &fetch_block)).to eq('local-computed') end end end From 3a8125965803c3512d8802cec5882b806260d0fa Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:58:39 -0500 Subject: [PATCH 083/108] add uniform exception handling across all drivers --- spec/legion/cache/exception_handling_spec.rb | 90 ++++++++++++++++++ spec/legion/cache/redis_cluster_spec.rb | 98 +++++--------------- 2 files changed, 115 insertions(+), 73 deletions(-) create mode 100644 spec/legion/cache/exception_handling_spec.rb diff --git a/spec/legion/cache/exception_handling_spec.rb b/spec/legion/cache/exception_handling_spec.rb new file mode 100644 index 0000000..c9636dd --- /dev/null +++ b/spec/legion/cache/exception_handling_spec.rb @@ -0,0 +1,90 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/memory' +require 'legion/cache/memcached' +require 'legion/cache/redis' + +RSpec.describe 'exception handling' do + describe Legion::Cache::Memory do + before { described_class.setup } + after { described_class.reset! } + + describe 'reads return nil on error' do + it 'get returns nil when store raises' do + allow(described_class).to receive(:expire_if_needed).and_raise(RuntimeError, 'boom') + expect(described_class.get('key')).to be_nil + end + end + + describe 'sync writes re-raise' do + it 'set_sync raises on error' do + allow(described_class.instance_variable_get(:@store)).to receive(:[]=).and_raise(RuntimeError, 'boom') + expect { described_class.set_sync('k', 'v', ttl: 60) }.to raise_error(RuntimeError, 'boom') + end + end + + describe 'flush handles errors internally' do + it 'flush returns nil on error' do + store = described_class.instance_variable_get(:@store) + allow(store).to receive(:clear).and_raise(RuntimeError, 'boom') + expect(described_class.flush).to be_nil + allow(store).to receive(:clear).and_call_original + end + end + end + + describe Legion::Cache::Memcached do + let(:cache) { described_class.dup } + let(:pool) { instance_double(ConnectionPool) } + let(:dalli) { instance_double(Dalli::Client) } + + before do + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + allow(pool).to receive(:with).and_yield(dalli) + end + + it 'get returns nil on error' do + allow(dalli).to receive(:get).and_raise(StandardError, 'timeout') + expect(cache.get('k')).to be_nil + end + + it 'set_sync re-raises on error' do + allow(dalli).to receive(:set).and_raise(StandardError, 'timeout') + expect { cache.set_sync('k', 'v', ttl: 60) }.to raise_error(StandardError, 'timeout') + end + + it 'delete_sync re-raises on error' do + allow(dalli).to receive(:delete).and_raise(StandardError, 'timeout') + expect { cache.delete_sync('k') }.to raise_error(StandardError, 'timeout') + end + end + + describe Legion::Cache::Redis do + let(:cache) { described_class.dup } + let(:pool) { instance_double(ConnectionPool) } + let(:redis) { instance_double(Redis) } + + before do + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + allow(pool).to receive(:with).and_yield(redis) + end + + it 'get returns nil on error' do + allow(redis).to receive(:get).and_raise(StandardError, 'timeout') + expect(cache.get('k')).to be_nil + end + + it 'set_sync re-raises on error' do + allow(redis).to receive(:set).and_raise(StandardError, 'timeout') + expect { cache.set_sync('k', 'v', ttl: 60) }.to raise_error(StandardError, 'timeout') + end + + it 'delete_sync re-raises on error' do + allow(redis).to receive(:del).and_raise(StandardError, 'timeout') + expect { cache.delete_sync('k') }.to raise_error(StandardError, 'timeout') + end + end +end diff --git a/spec/legion/cache/redis_cluster_spec.rb b/spec/legion/cache/redis_cluster_spec.rb index 7948fc5..9f16ff4 100644 --- a/spec/legion/cache/redis_cluster_spec.rb +++ b/spec/legion/cache/redis_cluster_spec.rb @@ -176,15 +176,15 @@ expect(described_class).not_to receive(:set) fetch_block = proc { 'computed' } - expect(described_class.fetch('fetch-key', 60, &fetch_block)).to eq('cached') + expect(described_class.fetch('fetch-key', ttl: 60, &fetch_block)).to eq('cached') end it 'stores and returns the computed value on miss' do allow(described_class).to receive(:get).with('fetch-key').and_return(nil) - expect(described_class).to receive(:set).with('fetch-key', 'computed', 60).and_return(true) + expect(described_class).to receive(:set).with('fetch-key', 'computed', ttl: 60).and_return(true) fetch_block = proc { 'computed' } - expect(described_class.fetch('fetch-key', 60, &fetch_block)).to eq('computed') + expect(described_class.fetch('fetch-key', ttl: 60, &fetch_block)).to eq('computed') end end @@ -251,82 +251,34 @@ allow(pool).to receive(:with).and_yield(redis_conn) end - it 'routes get failures through handle_exception and re-raises' do + it 'get returns nil on failure (handled)' do allow(redis_conn).to receive(:get).and_raise(Redis::BaseError, 'node down') - allow(described_class).to receive(:handle_exception) - expect { described_class.send(:get, 'key') }.to raise_error(Redis::BaseError) - expect(described_class).to have_received(:handle_exception).with( - an_instance_of(Redis::BaseError), - level: :warn, - handled: false, - operation: 'redis_get', - key: 'key' - ) - end - - it 'routes set failures through handle_exception and re-raises' do + expect(described_class.get('key')).to be_nil + end + + it 'set_sync re-raises on failure' do allow(redis_conn).to receive(:set).and_raise(Redis::BaseError, 'write failed') - allow(described_class).to receive(:handle_exception) - expect { described_class.send(:set, 'key', 'val') }.to raise_error(Redis::BaseError) - expect(described_class).to have_received(:handle_exception).with( - an_instance_of(Redis::BaseError), - level: :warn, - handled: false, - operation: 'redis_set', - key: 'key', - ttl: nil - ) - end - - it 'routes delete failures through handle_exception and re-raises' do + expect { described_class.set_sync('key', 'val', ttl: 60) }.to raise_error(Redis::BaseError) + end + + it 'delete_sync re-raises on failure' do allow(redis_conn).to receive(:del).and_raise(Redis::BaseError, 'conn lost') - allow(described_class).to receive(:handle_exception) - expect { described_class.send(:delete, 'key') }.to raise_error(Redis::BaseError) - expect(described_class).to have_received(:handle_exception).with( - an_instance_of(Redis::BaseError), - level: :warn, - handled: false, - operation: 'redis_delete', - key: 'key' - ) - end - - it 'routes mget failures through handle_exception and re-raises' do + expect { described_class.delete_sync('key') }.to raise_error(Redis::BaseError) + end + + it 'mget returns empty hash on failure (handled)' do allow(redis_conn).to receive(:mget).and_raise(Redis::BaseError, 'cluster fail') - allow(described_class).to receive(:handle_exception) - expect { described_class.mget('a') }.to raise_error(Redis::BaseError) - expect(described_class).to have_received(:handle_exception).with( - an_instance_of(Redis::BaseError), - level: :warn, - handled: false, - operation: 'redis_mget', - key_count: 1 - ) - end - - it 'routes mset failures through handle_exception and re-raises' do + expect(described_class.mget('a')).to eq({}) + end + + it 'mset_sync re-raises on failure' do allow(redis_conn).to receive(:mset).and_raise(Redis::BaseError, 'cluster fail') - allow(described_class).to receive(:handle_exception) - expect { described_class.mset({ 'a' => '1' }) }.to raise_error(Redis::BaseError) - expect(described_class).to have_received(:handle_exception).with( - an_instance_of(Redis::BaseError), - level: :warn, - handled: false, - operation: 'redis_mset', - key_count: 1 - ) - end - - it 'routes flush failures through handle_exception and re-raises' do + expect { described_class.mset_sync({ 'a' => '1' }) }.to raise_error(Redis::BaseError) + end + + it 'flush returns nil on failure (handled)' do allow(redis_conn).to receive(:flushdb).and_raise(Redis::BaseError, 'flush fail') - allow(described_class).to receive(:handle_exception) - expect { described_class.flush }.to raise_error(Redis::BaseError) - expect(described_class).to have_received(:handle_exception).with( - an_instance_of(Redis::BaseError), - level: :warn, - handled: false, - operation: 'redis_flush' - ) + expect(described_class.flush).to be_nil end end From cfd35f734dfba3f1dd3f7b76a8a7a4ab33741da1 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 12:58:48 -0500 Subject: [PATCH 084/108] revise design doc with adversarial review round 1 fixes --- .../2026-04-06-cache-optimization-design.md | 135 +++++++++++++++--- 1 file changed, 112 insertions(+), 23 deletions(-) diff --git a/docs/plans/2026-04-06-cache-optimization-design.md b/docs/plans/2026-04-06-cache-optimization-design.md index 74fdb7d..0724456 100644 --- a/docs/plans/2026-04-06-cache-optimization-design.md +++ b/docs/plans/2026-04-06-cache-optimization-design.md @@ -2,7 +2,7 @@ **Date**: 2026-04-06 **Author**: Matthew Iverson (@Esity) -**Status**: Approved +**Status**: Approved (revised after adversarial review round 1) ## Goals @@ -39,6 +39,7 @@ stats # frozen Hash snapshot - Default TTL: global = 3600 (1 hour), local = 21600 (6 hours). - `flush` drops the `delay` argument (Memcached-specific, Redis doesn't support it). - `async: true` is the default for all write operations. +- **Internal callers** (`Cacheable`, `Helper`) always use `async: false` to preserve read-after-write consistency. External callers get async by default. ### 2. Write Delegation Pattern @@ -58,6 +59,8 @@ delete(key, async:) -> delete_sync(key) / delete_async(key) mset(hash, ttl:, async:) -> mset_sync(hash, ttl:) / mset_async(hash, ttl:) ``` +**Note on `mset` TTL:** Redis and Memcached `mset` do not natively support per-entry TTL. `mset_sync` is implemented as per-key `set_sync` calls with the TTL applied to each entry. This trades batch atomicity for uniform TTL behavior. This is acceptable because `mset` is a convenience method, not a performance-critical path. + ### 3. Exception Handling Model | Category | Re-raise? | `handled:` | Returns on failure | @@ -78,30 +81,36 @@ Fixes: When using the Redis driver, complex types are serialized transparently: **On `set_sync`:** -- String values -> stored with `type:string` prefix byte -- Hash/Array/JSON-serializable -> `Legion::JSON.dump` with `type:json` prefix byte +- String values -> stored with `type:string` prefix byte (`"S\x00"`) +- Hash/Array/JSON-serializable -> `Legion::JSON.dump` with `type:json` prefix byte (`"J\x00"`) +- Both prefix constants are `.b` (binary encoding) frozen strings. **On `get`:** +- Force binary encoding on raw value (`raw = raw.b`) before prefix checks to avoid `Encoding::CompatibilityError` - `type:json` prefix -> `Legion::JSON.load` - `type:string` or no prefix (legacy data) -> return raw string - Deserialization failure -> return raw string, log warning +**On `mget`:** Apply `deserialize_value` to each returned value. + +**On `mset_sync`:** Apply `serialize_value` to each value (implemented as per-key `set_sync`). + Memcached uses Dalli's `serializer` option (already `Legion::JSON`). Memory stores Ruby objects directly. No changes needed for either. -`RedisHash` module is unchanged -- it remains the explicit "I want Redis data structures" path. +`RedisHash` module is unchanged -- it operates in its own keyspace using native Redis hash data structures. It does not share keys with `set`/`get` and is not affected by the prefix-byte serialization scheme. ### 5. `enabled?` vs `connected?` - `enabled?` = desired state from `Legion::Settings[:cache][:enabled]` (or `:cache_local`). Config-driven. Connection errors never change it. - `connected?` = actual state. Cached boolean flag, no network pings. -- If `enabled? == false`: `connected?` is always `false`, no retries, no connections. Reads return `nil`, async writes no-op (`true`), sync writes raise. +- If `enabled? == false`: `connected?` is always `false`, no retries, no connections. Reads return `nil`, async writes no-op (`true`), sync writes raise. **`setup` returns immediately without attempting any connections.** - If `enabled? == true && connected? == false`: reconnector runs in background. ### 6. AsyncWriter New file: `lib/legion/cache/async_writer.rb` -Uses `Concurrent::ThreadPoolExecutor` (already a transitive dependency). +Uses `Concurrent::ThreadPoolExecutor`. Requires `concurrent-ruby` (added as direct gemspec dependency). ```ruby Legion::Cache::AsyncWriter @@ -111,7 +120,8 @@ Legion::Cache::AsyncWriter .running? .pool_size # current thread count .queue_depth # pending jobs - .processed_count # total completed (atomic counter) + .processed_count # total successful completions (atomic counter) + .failed_count # total failed jobs (atomic counter) ``` Settings (`Legion::Settings[:cache][:async]`): @@ -123,28 +133,37 @@ Settings (`Legion::Settings[:cache][:async]`): } ``` +**Thread safety:** `enqueue` captures a local reference to `@executor` before checking `running?` to prevent TOCTOU races with concurrent `stop` calls. Uses `Concurrent::AtomicBoolean` and `Concurrent::AtomicFixnum` instead of raw Mutex for counters and flags. + **Backpressure:** When queue is full, `enqueue` falls back to synchronous execution and logs a warning. -**Shutdown:** `Legion::Cache.shutdown` calls `AsyncWriter.stop(timeout:)`: +**Shutdown:** `Legion::Cache.shutdown` drains the async writer FIRST (before closing pools), then calls `AsyncWriter.stop(timeout:)`: 1. Stop accepting new work 2. Wait up to `shutdown_timeout` seconds for drain 3. Force-kill remaining threads if timeout exceeded 4. Log drained vs abandoned job counts +**Tier awareness:** Each tier (shared, local) gets its own `AsyncWriter` instance. Local reads settings from `Legion::Settings[:cache_local][:async]`, shared reads from `Legion::Settings[:cache][:async]`. + ### 7. Reconnector New file: `lib/legion/cache/reconnector.rb` -One instance per tier (shared, local). +One instance per tier (shared, local). Requires `require 'concurrent'`. **Behavior:** -- Triggered when lifecycle fails and `enabled? == true` -- Only one reconnect loop per tier (mutex-guarded) +- Triggered when shared setup fails and `enabled? == true` — **regardless of whether local fallback succeeds** +- Only one reconnect loop per tier (guarded by `Concurrent::AtomicBoolean`) - Exponential backoff: 1s -> 2s -> 4s -> ... -> 60s cap - Unlimited retries while `enabled? == true` -- On success: reset backoff, set `@connected = true` +- On success: log attempt count, then reset backoff counter - On `enabled?` becoming `false`: stop immediately - Read/write callers never trigger reconnect directly (no thundering herd) +- Uses `Concurrent::AtomicFixnum` for attempt counter (reset via `Concurrent::AtomicFixnum.new(0)`, not `.value=`) + +**Reconnect path:** A separate `reconnect_shared!` method (and `reconnect_local!` for Local) that raises on failure is used by the reconnect loop. This is distinct from `setup_shared` which rescues internally for normal boot flow. + +**Thread safety for `stop`:** Sets `@stop_signal` (AtomicBoolean) inside synchronization, then releases the lock before calling `@thread.join` to prevent deadlock. Settings (`Legion::Settings[:cache][:reconnect]`): ```json @@ -155,22 +174,25 @@ Settings (`Legion::Settings[:cache][:reconnect]`): } ``` +**Tier awareness:** Local reconnector reads from `Legion::Settings[:cache_local][:reconnect]`. + ### 8. Stats ```ruby Legion::Cache.stats # => { -# driver: "dalli", -# servers: ["10.0.1.50:11211", "10.0.1.51:11211"], +# driver: "memory", # varies: "dalli", "redis", "memory" +# servers: ["127.0.0.1:11211"], # enabled: true, # connected: true, # using_local: false, -# using_memory: false, -# pool_size: 10, -# pool_available: 7, +# using_memory: true, +# pool_size: 1, +# pool_available: 1, # async_pool_size: 4, -# async_queue_depth: 12, +# async_queue_depth: 0, # async_processed: 4832, +# async_failed: 3, # reconnect_attempts: 0, # uptime: 3600 # } @@ -197,6 +219,8 @@ client( Resolution chain: explicit kwarg -> `Legion::Settings[:cache]` -> `Legion::Cache::Settings.default` +**Redis Cluster flush:** Per-node connections in `cluster_flush` must pass the same credentials (`username`, `password`) and TLS options used by the main connection. These are extracted from the stored connection opts. + ### 10. Logger Consistency - All modules use `Legion::Logging::Helper` and call `log` directly. @@ -204,9 +228,17 @@ Resolution chain: explicit kwarg -> `Legion::Settings[:cache]` -> `Legion::Cache - Dalli's internal logger set to `log`. - Uniform log format: `[cache:] key= ...` where tier is `shared`, `local`, or `memory`. +### 11. Concurrency Primitives + +Prefer `concurrent-ruby` primitives over raw `Mutex`: +- `Concurrent::AtomicBoolean` for flags (`@connected`, `@stop_signal`) +- `Concurrent::AtomicFixnum` for counters (`@processed`, `@failed`, `@attempts`) +- `Concurrent::ThreadPoolExecutor` for async writer +- Only use `Mutex` when `concurrent-ruby` has no suitable alternative + ## Implementation Phases -Each phase is a standalone commit. +Each phase is a standalone commit, except where noted. ### Phase 1: Unify method signatures - TTL keyword-only across all drivers and both tiers @@ -215,6 +247,7 @@ Each phase is a standalone commit. - Normalize `client` kwargs across Memcached/Redis - Fix Memcached `get` nil-check bug - Use `log` everywhere, remove logger indirection +- **Helper and Cacheable updates are included in this phase** (single atomic commit for top-level, helper, and cacheable signature changes to avoid broken intermediate state) ### Phase 2: Exception handling - Wrap every public method per the exception model table @@ -225,27 +258,83 @@ Each phase is a standalone commit. ### Phase 3: Transparent JSON serialization (Redis) - Add prefix-byte serialization in Redis `set_sync`/`get` +- Apply `deserialize_value` to `mget` results +- Apply `serialize_value` in `mset_sync` (per-key iteration) +- Force binary encoding before prefix checks - Graceful fallback for legacy keys (no prefix = raw string) - No changes to Memcached or Memory +- Fix Redis cluster flush to pass credentials and TLS options ### Phase 4: `enabled?`, `connected?`, `stats` - Add `enabled?` to both tiers backed by settings -- Guard all operations on `enabled?` -- Add `stats` method with servers, pool info, async pool size, uptime +- Guard all operations on `enabled?` — **including `setup`** +- Add `stats` method with servers, pool info, async pool size, async failed count, uptime ### Phase 5: AsyncWriter - New `async_writer.rb` with `Concurrent::ThreadPoolExecutor` - Add `set_sync`/`set_async`/`set` delegation pattern for `set`, `delete`, `mset` -- `async: true` default on writes +- `async: true` default on writes; Helper and Cacheable hardcode `async: false` - Backpressure: synchronous fallback when queue full +- Separate `processed_count` and `failed_count` counters +- TOCTOU-safe enqueue via local executor reference capture +- Drain async writer before closing pools on shutdown +- Tier-aware settings (`:cache` vs `:cache_local`) ### Phase 6: Reconnector - New `reconnector.rb` with exponential backoff (1s -> 60s cap) +- `require 'concurrent'` at top of file +- Separate `reconnect_shared!` / `reconnect_local!` raising methods for the retry loop +- Start shared reconnector even when local fallback succeeds - Wire into lifecycle failures - Respects `enabled?` -- stops if disabled -- One instance per tier, mutex-guarded +- One instance per tier, guarded by `Concurrent::AtomicBoolean` +- `stop` releases lock before `thread.join` (no deadlock) +- Reset attempt counter via new `AtomicFixnum` instance, log count before reset +- Tier-aware settings (`:cache` vs `:cache_local`) ### Phase 7: Wire together + specs - Integration between AsyncWriter, Reconnector, and both tiers - Shutdown drains async pool with configurable timeout - Update all specs to cover new behavior + +## Adversarial Review Round 1 — Resolution Log + +### Fixed in this revision + +| # | Source | Finding | Resolution | +|---|--------|---------|------------| +| 1 | All 3 | `mget`/`mset` excluded from serialization | Added to Phase 3: deserialize in mget, serialize via per-key set_sync in mset_sync | +| 2 | Sonnet, 5.3 | Missing `require 'concurrent'` in reconnector | Added to Phase 6 | +| 3 | Sonnet, 5.3 | Helper/Cacheable positional TTL breaks between commits | Merged into Phase 1 as single atomic commit | +| 4 | 5.4, 5.3 | Redis cluster flush ignores auth/TLS | Added to Phase 3 and §9 | +| 5 | Sonnet | `@attempts.value = 0` invalid on AtomicFixnum | Fixed in §7: use new AtomicFixnum instance, log before reset | +| 6 | Sonnet, 5.3 | AsyncWriter enqueue TOCTOU race | Fixed in §6: capture local executor reference | +| 7 | Sonnet | Reconnector stop deadlocks (mutex held across join) | Fixed in §7: release lock before join | +| 8 | 5.4, 5.3 | Reconnector can't detect failure (setup_shared rescues) | Added `reconnect_shared!` raising method in §7 | +| 9 | 5.3 | Reconnector only starts when both tiers fail | Fixed in §7: starts whenever shared fails | +| 10 | 5.4, 5.3 | `enabled?` must guard `setup` | Fixed in §5: setup returns immediately when disabled | +| 11 | 5.4 | Local tier reads `:cache` for async/reconnect settings | Fixed in §6 and §7: tier-aware settings parameter | +| 12 | Sonnet | Stats example shows wrong driver | Fixed in §8: example shows `"memory"` with note | +| 13 | Sonnet | Serialization prefix encoding compatibility | Fixed in §4: force binary encoding before checks | +| 14 | Sonnet | `processed_count` counts failures | Fixed in §6: separate `failed_count` counter | +| 15 | 5.3 | `mset(ttl:)` not natively implementable | Documented in §2: implemented as per-key set_sync | +| 16 | All 3 | Async writes and lifecycle share no lock | No lifecycle mutex needed — reconnector reconnects to same servers, routing flags only change at boot/shutdown | +| 17 | Sonnet | Pool reads wrong settings for Local | Documented: fallback is dead code after proper client() init | + +### Dismissed + +| # | Source | Finding | Reason | +|---|--------|---------|--------| +| 1 | Sonnet | Memory module shared state / dup | Existing behavior, Memory is singleton in lite mode, never dup'd | +| 2 | Sonnet | `enabled?` fail-open during boot | Correct — before settings load, cache should attempt to work | +| 3 | Sonnet | Reconnector specs use sleep | Acceptable for now, can improve later | +| 4 | Sonnet | Task ordering dependency (Task 5 before 2/3) | Tasks execute sequentially, not a real issue | + +### User decisions + +| # | Finding | Decision | +|---|---------|----------| +| 1 | `async: true` default breaks read-after-write | Keep `async: true` default. Helper and Cacheable hardcode `async: false`. | +| 2 | TTL 60→3600 breaking change | Keep 3600/21600. LEX extensions specify own TTL. PHI cap is non-concern for local tier. | +| 3 | Minor vs major version bump | Keep 1.4.0. Internal gem, all callers controlled. | +| 4 | Lifecycle mutex for reconnector races | Not needed. Reconnector reconnects to same servers, no cluster swaps. | From 597b43be822f15e3dab9f9cf784751a3e36d9e38 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:00:45 -0500 Subject: [PATCH 085/108] add exception handling to local tier and top-level cache --- spec/legion/cache/exception_handling_spec.rb | 27 ++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/spec/legion/cache/exception_handling_spec.rb b/spec/legion/cache/exception_handling_spec.rb index c9636dd..55844f3 100644 --- a/spec/legion/cache/exception_handling_spec.rb +++ b/spec/legion/cache/exception_handling_spec.rb @@ -1,6 +1,7 @@ # frozen_string_literal: true require 'spec_helper' +require 'legion/cache' require 'legion/cache/memory' require 'legion/cache/memcached' require 'legion/cache/redis' @@ -88,3 +89,29 @@ end end end + +RSpec.describe 'Legion::Cache top-level exception handling' do + before do + ENV['LEGION_MODE'] = 'lite' + Legion::Cache::Memory.setup + Legion::Cache.instance_variable_set(:@using_memory, true) + Legion::Cache.instance_variable_set(:@connected, true) + end + + after do + ENV.delete('LEGION_MODE') + Legion::Cache::Memory.reset! + Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@connected, false) + end + + it 'get returns nil on internal error' do + allow(Legion::Cache::Memory).to receive(:get).and_raise(RuntimeError, 'boom') + expect(Legion::Cache.get('key')).to be_nil + end + + it 'set with async: false re-raises on error from Memory' do + allow(Legion::Cache::Memory).to receive(:set).and_raise(RuntimeError, 'boom') + expect { Legion::Cache.set('k', 'v', ttl: 60, async: false) }.to raise_error(RuntimeError, 'boom') + end +end From bf7172b0a568b4140653ce09d8cd18ce67e86249 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:02:14 -0500 Subject: [PATCH 086/108] add transparent JSON serialization for redis driver --- lib/legion/cache/redis.rb | 33 ++++++++++- spec/legion/cache/redis_serialization_spec.rb | 58 +++++++++++++++++++ 2 files changed, 89 insertions(+), 2 deletions(-) create mode 100644 spec/legion/cache/redis_serialization_spec.rb diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 694c068..63e2e41 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -78,7 +78,8 @@ def cluster_mode? end def get(key) - result = client.with { |conn| conn.get(key) } + raw = client.with { |conn| conn.get(key) } + result = deserialize_value(raw) log.debug { "[cache] GET #{key} hit=#{!result.nil?}" } result rescue StandardError => e @@ -103,7 +104,8 @@ def set_sync(key, value, ttl: nil, **) effective_ttl = ttl || default_ttl args = {} args[:ex] = effective_ttl unless effective_ttl.nil? - result = client.with { |conn| conn.set(key, value, **args) == 'OK' } + serialized = serialize_value(value) + result = client.with { |conn| conn.set(key, serialized, **args) == 'OK' } log.debug { "[cache] SET #{key} ttl=#{effective_ttl.inspect} success=#{result}" } result rescue StandardError => e @@ -181,6 +183,33 @@ def mset_sync(hash, ttl: nil, **) private + SERIALIZE_STRING = "S\x00".b.freeze + SERIALIZE_JSON = "J\x00".b.freeze + + def serialize_value(value) + case value + when String + "#{SERIALIZE_STRING}#{value}" + else + "#{SERIALIZE_JSON}#{Legion::JSON.dump(value)}" + end + end + + def deserialize_value(raw) + return nil if raw.nil? + + if raw.start_with?(SERIALIZE_JSON) + Legion::JSON.load(raw.byteslice(2..)) + elsif raw.start_with?(SERIALIZE_STRING) + raw.byteslice(2..) + else + raw # legacy data, no prefix + end + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :redis_deserialize) + raw + end + def default_ttl return 3600 unless defined?(Legion::Settings) diff --git a/spec/legion/cache/redis_serialization_spec.rb b/spec/legion/cache/redis_serialization_spec.rb new file mode 100644 index 0000000..6b4c5b5 --- /dev/null +++ b/spec/legion/cache/redis_serialization_spec.rb @@ -0,0 +1,58 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/redis' + +RSpec.describe 'Redis transparent serialization' do + let(:cache) { Legion::Cache::Redis.dup } + let(:pool) { instance_double(ConnectionPool) } + let(:redis) { instance_double(Redis) } + + before do + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + allow(pool).to receive(:with).and_yield(redis) + end + + describe 'set_sync serializes complex types' do + it 'prefixes strings with S' do + expect(redis).to receive(:set).with('k', "S\x00hello", any_args).and_return('OK') + cache.set_sync('k', 'hello', ttl: 60) + end + + it 'prefixes hashes with J and JSON-encodes' do + expect(redis).to receive(:set).with('k', /\AJ\x00/, any_args).and_return('OK') + cache.set_sync('k', { foo: 'bar' }, ttl: 60) + end + + it 'prefixes arrays with J and JSON-encodes' do + expect(redis).to receive(:set).with('k', /\AJ\x00/, any_args).and_return('OK') + cache.set_sync('k', [1, 2, 3], ttl: 60) + end + end + + describe 'get deserializes based on prefix' do + it 'returns plain string for S prefix' do + allow(redis).to receive(:get).and_return("S\x00hello") + expect(cache.get('k')).to eq('hello') + end + + it 'returns parsed hash for J prefix' do + json = Legion::JSON.dump({ foo: 'bar' }) + allow(redis).to receive(:get).and_return("J\x00#{json}") + result = cache.get('k') + expect(result).to be_a(Hash) + expect(result[:foo] || result['foo']).to eq('bar') + end + + it 'returns raw string for legacy data without prefix' do + allow(redis).to receive(:get).and_return('legacy_value') + expect(cache.get('k')).to eq('legacy_value') + end + + it 'returns raw string when JSON parse fails' do + allow(redis).to receive(:get).and_return("J\x00not-valid-json{{{") + expect(cache.get('k')).to eq("J\x00not-valid-json{{{") + end + end +end From 6c26a1aa6d2d3e9cc525beddc30268e097acc3ca Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:02:55 -0500 Subject: [PATCH 087/108] add enabled? guard to both cache tiers --- spec/legion/cache/enabled_spec.rb | 44 +++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 spec/legion/cache/enabled_spec.rb diff --git a/spec/legion/cache/enabled_spec.rb b/spec/legion/cache/enabled_spec.rb new file mode 100644 index 0000000..6c1a5d4 --- /dev/null +++ b/spec/legion/cache/enabled_spec.rb @@ -0,0 +1,44 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'enabled? and connected?' do + before do + Legion::Cache.instance_variable_set(:@connected, false) + Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@using_local, false) + Legion::Cache::Local.reset! + end + + after do + Legion::Settings[:cache][:enabled] = true + end + + describe 'Legion::Cache.enabled?' do + it 'returns true when settings enabled is true' do + Legion::Settings[:cache][:enabled] = true + expect(Legion::Cache.enabled?).to be(true) + end + + it 'returns false when settings enabled is false' do + Legion::Settings[:cache][:enabled] = false + expect(Legion::Cache.enabled?).to be(false) + end + end + + describe 'Legion::Cache::Local.enabled?' do + it 'reads from cache_local settings' do + Legion::Settings[:cache_local] ||= {} + Legion::Settings[:cache_local][:enabled] = false + expect(Legion::Cache::Local.enabled?).to be(false) + Legion::Settings[:cache_local][:enabled] = true + end + end + + describe 'Legion::Cache::Memory enabled?' do + it 'always returns true' do + expect(Legion::Cache::Memory).to respond_to(:connected?) + end + end +end From 57ec731466edfb31bcd34e64d50d86d419732466 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:04:14 -0500 Subject: [PATCH 088/108] add post-optimization fixes plan (adversarial review + connection pool) --- ...026-04-06-cache-post-optimization-fixes.md | 993 ++++++++++++++++++ 1 file changed, 993 insertions(+) create mode 100644 docs/plans/2026-04-06-cache-post-optimization-fixes.md diff --git a/docs/plans/2026-04-06-cache-post-optimization-fixes.md b/docs/plans/2026-04-06-cache-post-optimization-fixes.md new file mode 100644 index 0000000..5b146be --- /dev/null +++ b/docs/plans/2026-04-06-cache-post-optimization-fixes.md @@ -0,0 +1,993 @@ +# Legion::Cache Post-Optimization Fixes + +> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task. + +**Goal:** Apply adversarial review fixes and connection pool improvements on top of the completed cache optimization work (from `2026-04-06-cache-optimization-plan.md`). + +**Architecture:** Two phases — Phase A fixes issues found by adversarial review that the in-flight implementation won't have addressed. Phase B improves connection pool usage. + +**Tech Stack:** Ruby >= 3.4, concurrent-ruby, Dalli, Redis, ConnectionPool, Legion::Logging, Legion::Settings + +**Prerequisite:** The `2026-04-06-cache-optimization-plan.md` must be fully implemented and merged first. + +**Design doc:** `docs/plans/2026-04-06-cache-optimization-design.md` (adversarial review resolution log at bottom) + +--- + +## Phase A: Adversarial Review Fixes + +These address findings from 3 adversarial reviewers (Sonnet 4.6, Codex gpt-5.3-codex, Codex gpt-5.4) that the in-flight implementation plan does not cover. + +--- + +### Task A1: Force Cacheable and Helper to use async: false + +**Files:** +- Modify: `lib/legion/cache/helper.rb` +- Modify: `lib/legion/cache/cacheable.rb` +- Test: `spec/legion/cache/helper_spec.rb`, `spec/legion/cacheable_spec.rb` + +**Context:** All 3 reviewers flagged that `async: true` default breaks read-after-write patterns in Cacheable and Helper. User decision: keep `async: true` as public default, but internal callers hardcode `async: false`. + +**Step 1: Write the failing tests** + +Add to `spec/legion/cache/helper_spec.rb`: + +```ruby +describe 'cache_set uses synchronous writes' do + it 'passes async: false to Legion::Cache.set' do + expect(Legion::Cache).to receive(:set).with(anything, anything, hash_including(async: false)) + subject.cache_set('key', 'value') + end +end + +describe 'cache_delete uses synchronous writes' do + it 'passes async: false to Legion::Cache.delete' do + expect(Legion::Cache).to receive(:delete).with(anything, hash_including(async: false)) + subject.cache_delete('key') + end +end +``` + +Add to `spec/legion/cacheable_spec.rb`: + +```ruby +describe 'cache_write uses synchronous writes' do + it 'passes async: false to Legion::Cache.set' do + allow(Legion::Cache::Cacheable).to receive(:global_cache_available?).and_return(true) + expect(Legion::Cache).to receive(:set).with('k', 'v', hash_including(async: false)) + Legion::Cache::Cacheable.cache_write('k', 'v', ttl: 60, scope: :global) + end +end +``` + +**Step 2: Run tests to verify they fail** + +Run: `bundle exec rspec spec/legion/cache/helper_spec.rb spec/legion/cacheable_spec.rb -v` +Expected: FAIL — current code does not pass `async: false`. + +**Step 3: Update Helper** + +In `lib/legion/cache/helper.rb`, update all write calls: + +```ruby +def cache_set(key, value, ttl: nil, phi: false) + effective_ttl = ttl || cache_default_ttl + Legion::Cache.set(cache_namespace + key, value, ttl: effective_ttl, async: false, phi: phi) +end + +def cache_delete(key) + Legion::Cache.delete(cache_namespace + key, async: false) +end + +def cache_mset(hash, ttl: nil) + return true if hash.empty? + effective_ttl = ttl || cache_default_ttl + hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, ttl: effective_ttl, async: false) } + true +rescue StandardError => e + log_cache_error('cache_mset', e) + false +end + +def local_cache_set(key, value, ttl: nil, phi: false) + effective_ttl = ttl || local_cache_default_ttl + effective_ttl = Legion::Cache.enforce_phi_ttl(effective_ttl, phi: phi) + Legion::Cache::Local.set(cache_namespace + key, value, ttl: effective_ttl, async: false) +end + +def local_cache_delete(key) + Legion::Cache::Local.delete(cache_namespace + key, async: false) +end + +def local_cache_mset(hash, ttl: nil) + return true if hash.empty? + effective_ttl = ttl || local_cache_default_ttl + hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, ttl: effective_ttl, async: false) } + true +rescue StandardError => e + log_cache_error('local_cache_mset', e) + false +end +``` + +**Step 4: Update Cacheable** + +In `lib/legion/cache/cacheable.rb`, update `cache_write` and `local_cache_write`: + +```ruby +def self.cache_write(key, value, ttl:, scope:) + case scope + when :global + if global_cache_available? + Legion::Cache.set(key, value, ttl: ttl, async: false) + else + memory_write(key, value, ttl) + end + else + if local_cache_available? + result = local_cache_write(key, value, ttl) + memory_write(key, value, ttl) unless result + else + memory_write(key, value, ttl) + end + end +end + +def self.local_cache_write(key, value, ttl) + return unless local_cache_available? + Legion::Cache::Local.set(key, value, ttl: ttl, async: false) +rescue StandardError => e + handle_exception(e, level: :warn, operation: :local_cache_write, key: key, ttl: ttl) + nil +end +``` + +**Step 5: Run tests** + +Run: `bundle exec rspec spec/legion/cache/helper_spec.rb spec/legion/cacheable_spec.rb -v` +Expected: PASS + +**Step 6: Commit** + +```bash +git add lib/legion/cache/helper.rb lib/legion/cache/cacheable.rb spec/legion/cache/helper_spec.rb spec/legion/cacheable_spec.rb +git commit -m "force helper and cacheable to use synchronous cache writes" +``` + +--- + +### Task A2: Fix AsyncWriter TOCTOU race in enqueue + +**Files:** +- Modify: `lib/legion/cache/async_writer.rb` +- Test: `spec/legion/cache/async_writer_spec.rb` + +**Context:** Sonnet C-3 and Codex 5.3 F6 flagged that `enqueue` checks `running?` then calls `@executor.post` — another thread can nil `@executor` between the two. + +**Step 1: Write the failing test** + +Add to `spec/legion/cache/async_writer_spec.rb`: + +```ruby +describe 'thread safety' do + it 'handles concurrent stop and enqueue without error' do + writer.start + errors = Concurrent::AtomicFixnum.new(0) + threads = 10.times.map do + Thread.new do + 50.times { writer.enqueue { nil } } + rescue StandardError + errors.increment + end + end + sleep 0.05 + writer.stop(timeout: 2) + threads.each(&:join) + expect(errors.value).to eq(0) + end +end +``` + +**Step 2: Run test** + +Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb -v` +Expected: May pass or fail depending on timing — the fix makes it deterministic. + +**Step 3: Fix enqueue** + +In `lib/legion/cache/async_writer.rb`, change `enqueue` to capture a local reference: + +```ruby +def enqueue(&block) + executor = @executor + if executor&.running? + executor.post do + block.call + @processed.increment + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :async_writer_job) + @failed.increment + end + else + block.call + @processed.increment + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :async_writer_sync_fallback) + @failed.increment + end +end +``` + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/async_writer.rb spec/legion/cache/async_writer_spec.rb +git commit -m "fix async writer TOCTOU race in enqueue" +``` + +--- + +### Task A3: Add failed_count to AsyncWriter stats + +**Files:** +- Modify: `lib/legion/cache/async_writer.rb` +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` +- Test: `spec/legion/cache/async_writer_spec.rb`, `spec/legion/cache/stats_spec.rb` + +**Step 1: Write the failing test** + +Add to `spec/legion/cache/async_writer_spec.rb`: + +```ruby +describe '#failed_count' do + it 'tracks failed jobs separately from processed' do + writer.start + writer.enqueue { raise 'boom' } + sleep 0.2 + expect(writer.failed_count).to eq(1) + expect(writer.processed_count).to eq(0) + end +end +``` + +Add to `spec/legion/cache/stats_spec.rb`: + +```ruby +it 'includes async_failed in stats' do + stats = Legion::Cache.stats + expect(stats).to have_key(:async_failed) +end +``` + +**Step 2: Run tests to verify they fail** + +Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb spec/legion/cache/stats_spec.rb -v` +Expected: FAIL + +**Step 3: Add failed_count** + +In `lib/legion/cache/async_writer.rb`: +- Add `@failed = Concurrent::AtomicFixnum.new(0)` in `initialize` +- In rescue inside `enqueue` worker: increment `@failed` instead of `@processed` +- Add `def failed_count; @failed.value; end` + +In `lib/legion/cache.rb` and `lib/legion/cache/local.rb`: +- Add `async_failed: @async_writer.failed_count` to `stats` hash + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb spec/legion/cache/stats_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/async_writer.rb lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/async_writer_spec.rb spec/legion/cache/stats_spec.rb +git commit -m "add failed_count to async writer stats" +``` + +--- + +### Task A4: Fix Reconnector — stop deadlock, AtomicFixnum reset, require concurrent + +**Files:** +- Modify: `lib/legion/cache/reconnector.rb` +- Test: `spec/legion/cache/reconnector_spec.rb` + +**Context:** Three issues in one file: +1. `stop` holds mutex across `thread.join` (Sonnet C-2) +2. `@attempts.value = 0` is invalid on AtomicFixnum (Sonnet H-2) +3. Missing `require 'concurrent'` (Sonnet H-4, Codex 5.3 F11) + +**Step 1: Write the failing tests** + +Add to `spec/legion/cache/reconnector_spec.rb`: + +```ruby +describe 'can be required independently' do + it 'loads without NameError' do + expect { require 'legion/cache/reconnector' }.not_to raise_error + end +end + +describe 'successful reconnect logging' do + let(:connect_block) do + call_count = Concurrent::AtomicFixnum.new(0) + -> { call_count.increment } + end + + it 'does not raise NoMethodError on attempt reset' do + reconnector.start + sleep 1.5 + expect { reconnector.stop }.not_to raise_error + end +end +``` + +**Step 2: Fix reconnector.rb** + +1. Add `require 'concurrent'` at top of file +2. Fix `stop` — release mutex before join: + +```ruby +def stop + thread_to_join = nil + @mutex.synchronize do + @stop_signal.make_true + thread_to_join = @thread + @thread = nil + end + thread_to_join&.join(5) + log.info "Legion::Cache::Reconnector[#{@tier}] stopped" +end +``` + +3. Fix attempt reset in `reconnect_loop`: + +```ruby +count = @attempts.value +@attempts = Concurrent::AtomicFixnum.new(0) +@next_retry_at = nil +log.info "Legion::Cache::Reconnector[#{@tier}] reconnected after #{count} attempts" +``` + +4. Use `Concurrent::AtomicBoolean` for `@stop_signal` instead of plain boolean. + +**Step 3: Run tests** + +Run: `bundle exec rspec spec/legion/cache/reconnector_spec.rb -v` +Expected: PASS + +**Step 4: Commit** + +```bash +git add lib/legion/cache/reconnector.rb spec/legion/cache/reconnector_spec.rb +git commit -m "fix reconnector deadlock, atomic reset, and missing require" +``` + +--- + +### Task A5: Add reconnect_shared! raising method and start reconnector on shared failure + +**Files:** +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` +- Test: `spec/legion/cache/reconnector_integration_spec.rb` + +**Context:** Codex 5.4 F1 and 5.3 F1/F4 flagged that `setup_shared` rescues internally so the reconnector's `connect_block` can never detect failure. Also, the reconnector should start whenever shared fails, even if local succeeds. + +**Step 1: Write the failing tests** + +Add to `spec/legion/cache/reconnector_integration_spec.rb`: + +```ruby +it 'starts reconnector even when local fallback succeeds' do + allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'refused') + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:setup) + + Legion::Cache.setup + + expect(Legion::Cache.using_local?).to be(true) + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + expect(reconnector).not_to be_nil + expect(reconnector.running?).to be(true) + reconnector.stop +end +``` + +**Step 2: Implement reconnect_shared!** + +In `lib/legion/cache.rb`, add a private method that raises on failure: + +```ruby +def reconnect_shared! + client(**Legion::Settings[:cache], logger: log) + @connected = true + @using_local = false + Legion::Settings[:cache][:connected] = true + log.info 'Legion::Cache shared reconnected' +end +``` + +Update `setup_shared` rescue to start the reconnector when shared fails and `enabled?` is true, regardless of local fallback: + +```ruby +rescue StandardError => e + report_exception(e, level: :warn, handled: true, operation: :setup_shared, fallback: :local) + if Legion::Cache::Local.connected? + @using_local = true + @connected = true + Legion::Settings[:cache][:connected] = true + log.info 'Legion::Cache fell back to Local cache' + else + @connected = false + Legion::Settings[:cache][:connected] = false + log.error 'Legion::Cache shared and local adapters are unavailable' + end + start_reconnector if enabled? +end +``` + +**Step 3: Run tests** + +Run: `bundle exec rspec spec/legion/cache/reconnector_integration_spec.rb -v` +Expected: PASS + +**Step 4: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/reconnector_integration_spec.rb +git commit -m "add raising reconnect path, start reconnector on any shared failure" +``` + +--- + +### Task A6: Guard setup with enabled? check + +**Files:** +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` +- Test: `spec/legion/cache/enabled_spec.rb` + +**Step 1: Write the failing test** + +Add to `spec/legion/cache/enabled_spec.rb`: + +```ruby +describe 'setup respects enabled?' do + it 'does not connect when disabled' do + Legion::Settings[:cache][:enabled] = false + expect(Legion::Cache::Local).not_to receive(:setup) + Legion::Cache.setup + expect(Legion::Cache.connected?).to be(false) + Legion::Settings[:cache][:enabled] = true + end +end +``` + +**Step 2: Add guard** + +In `lib/legion/cache.rb`, add at top of `setup`: +```ruby +def setup(**) + return unless enabled? + return Legion::Settings[:cache][:connected] = true if connected? + # ... rest of setup +end +``` + +Same in `lib/legion/cache/local.rb` `setup`. + +**Step 3: Run tests** + +Run: `bundle exec rspec spec/legion/cache/enabled_spec.rb -v` +Expected: PASS + +**Step 4: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/enabled_spec.rb +git commit -m "guard setup with enabled? check" +``` + +--- + +### Task A7: Make AsyncWriter and Reconnector tier-aware for settings + +**Files:** +- Modify: `lib/legion/cache/async_writer.rb`, `lib/legion/cache/reconnector.rb` +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` +- Test: `spec/legion/cache/async_writer_spec.rb`, `spec/legion/cache/reconnector_spec.rb` + +**Context:** Codex 5.4 F4 flagged that Local tier reads `:cache` settings for async/reconnect instead of `:cache_local`. + +**Step 1: Add settings_key parameter** + +In `lib/legion/cache/async_writer.rb`, accept `settings_key:` in `initialize`: + +```ruby +def initialize(settings_key: :cache, **opts) + @settings_key = settings_key + # ... +end + +def configured_pool_size + return DEFAULT_POOL_SIZE unless defined?(Legion::Settings) + Legion::Settings.dig(@settings_key, :async, :pool_size) || DEFAULT_POOL_SIZE +rescue StandardError + DEFAULT_POOL_SIZE +end +``` + +Same pattern for `configured_queue_size` and `configured_shutdown_timeout`. + +In `lib/legion/cache/reconnector.rb`, accept `settings_key:` in `initialize`: + +```ruby +def initialize(tier:, connect_block:, enabled_block:, settings_key: :cache) + @settings_key = settings_key + # ... +end +``` + +Update `configured_initial_delay` and `configured_max_delay` to use `@settings_key`. + +**Step 2: Wire in both tiers** + +In `lib/legion/cache.rb`: +```ruby +@async_writer = Legion::Cache::AsyncWriter.new(settings_key: :cache) +``` + +In `lib/legion/cache/local.rb`: +```ruby +@async_writer = Legion::Cache::AsyncWriter.new(settings_key: :cache_local) +``` + +Same for reconnector instances. + +**Step 3: Run tests** + +Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb spec/legion/cache/reconnector_spec.rb -v` +Expected: PASS + +**Step 4: Commit** + +```bash +git add lib/legion/cache/async_writer.rb lib/legion/cache/reconnector.rb lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/async_writer_spec.rb spec/legion/cache/reconnector_spec.rb +git commit -m "make async writer and reconnector tier-aware for settings" +``` + +--- + +### Task A8: Fix Redis serialization for mget and mset_sync + +**Files:** +- Modify: `lib/legion/cache/redis.rb` +- Test: `spec/legion/cache/redis_serialization_spec.rb` + +**Context:** All 3 reviewers flagged that serialization was only applied to `set_sync`/`get`, not `mget`/`mset`. + +**Step 1: Write the failing tests** + +Add to `spec/legion/cache/redis_serialization_spec.rb`: + +```ruby +describe 'mget deserializes values' do + it 'deserializes prefixed values from mget' do + allow(redis).to receive(:mget).and_return(["S\x00hello".b, "J\x00{\"a\":1}".b]) + result = cache.mget('k1', 'k2') + expect(result['k1']).to eq('hello') + expect(result['k2']).to be_a(Hash) + end +end + +describe 'mset_sync serializes values' do + it 'serializes each value through set_sync' do + allow(redis).to receive(:set).and_return('OK') + expect(redis).to receive(:set).with('k1', /\AS\x00/, any_args) + expect(redis).to receive(:set).with('k2', /\AJ\x00/, any_args) + cache.mset_sync({ 'k1' => 'hello', 'k2' => { a: 1 } }, ttl: 60) + end +end +``` + +**Step 2: Implement** + +In `lib/legion/cache/redis.rb`: + +`mget`: Apply `deserialize_value` to each value in the result hash. + +```ruby +def mget(*keys) + keys = keys.flatten + return {} if keys.empty? + + result = client.with do |conn| + if cluster_mode? + cluster_mget(conn, keys) + else + values = conn.mget(*keys) + keys.zip(values).to_h + end + end + result.transform_values { |v| deserialize_value(v) } +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :redis_mget, key_count: keys.size) + {} +end +``` + +`mset_sync`: Implement as per-key `set_sync` to get both serialization and TTL: + +```ruby +def mset_sync(hash, ttl: nil) + return true if hash.empty? + hash.each { |key, value| set_sync(key, value, ttl: ttl) } + true +end +``` + +Also force binary encoding in `deserialize_value`: + +```ruby +def deserialize_value(raw) + return nil if raw.nil? + raw = raw.b if raw.respond_to?(:b) + # ... rest of method +end +``` + +**Step 3: Run tests** + +Run: `bundle exec rspec spec/legion/cache/redis_serialization_spec.rb -v` +Expected: PASS + +**Step 4: Commit** + +```bash +git add lib/legion/cache/redis.rb spec/legion/cache/redis_serialization_spec.rb +git commit -m "apply serialization to mget/mset_sync, force binary encoding" +``` + +--- + +### Task A9: Fix Redis cluster flush to pass auth/TLS options + +**Files:** +- Modify: `lib/legion/cache/redis.rb` +- Test: `spec/legion/cache/redis_cluster_spec.rb` + +**Context:** Codex 5.4 F7 and 5.3 F9 flagged that `cluster_flush` opens raw unauthenticated connections. + +**Step 1: Write the failing test** + +Add to `spec/legion/cache/redis_cluster_spec.rb`: + +```ruby +describe 'cluster_flush passes credentials' do + it 'includes username and password in per-node connections' do + cache = described_class.dup + cache.instance_variable_set(:@connection_opts, { username: 'user', password: 'pass' }) + conn = instance_double(Redis) + node_info = "abc123 10.0.0.1:6379@16379 myself,master - 0 0 1 connected 0-5460\n" + allow(conn).to receive(:cluster).with('nodes').and_return(node_info) + + node_client = instance_double(Redis) + expect(Redis).to receive(:new).with(hash_including(host: '10.0.0.1', port: 6379, username: 'user', password: 'pass')).and_return(node_client) + allow(node_client).to receive(:flushdb) + allow(node_client).to receive(:close) + + cache.send(:cluster_flush, conn) + end +end +``` + +**Step 2: Store connection opts and pass to cluster_flush** + +In `lib/legion/cache/redis.rb`, store credential/TLS opts during `client`: + +```ruby +@connection_opts = { + username: username, + password: password, + timeout: @timeout +}.compact +@connection_opts.merge!(redis_tls_options(port: port.to_i)) if defined?(port) +``` + +Update `cluster_flush` to use stored opts: + +```ruby +def cluster_flush(conn) + node_info = conn.cluster('nodes') + primaries = node_info.lines.select { |l| l.include?('master') }.map { |l| l.split[1].split('@').first } + primaries.each do |addr| + host, port = Legion::Cache::Settings.parse_server_address(addr, default_port: 6379) + node = ::Redis.new(host: host, port: port.to_i, **(@connection_opts || {})) + node.flushdb + node.close + end + true +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cluster_flush, fallback: :single_flushdb) + conn.flushdb == 'OK' +end +``` + +**Step 3: Run tests** + +Run: `bundle exec rspec spec/legion/cache/redis_cluster_spec.rb -v` +Expected: PASS + +**Step 4: Commit** + +```bash +git add lib/legion/cache/redis.rb spec/legion/cache/redis_cluster_spec.rb +git commit -m "pass auth and TLS options to redis cluster flush per-node connections" +``` + +--- + +### Task A10: Drain async writer before closing pools on shutdown + +**Files:** +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` +- Test: `spec/legion/cache/async_integration_spec.rb` + +**Context:** Codex 5.3 F6 flagged that shutdown closes clients before the writer is drained, causing async jobs to execute against closed pools. + +**Step 1: Write the failing test** + +Add to `spec/legion/cache/async_integration_spec.rb`: + +```ruby +describe 'shutdown drains async writer before closing pool' do + it 'completes pending async writes before shutdown' do + Legion::Cache.set('drain_test', 'value', async: true) + Legion::Cache.shutdown + # Re-setup to verify the value was written before pool closed + Legion::Cache.setup + expect(Legion::Cache.get('drain_test')).to eq('value') + Legion::Cache.shutdown + end +end +``` + +**Step 2: Fix shutdown order** + +In `lib/legion/cache.rb` `shutdown`: + +```ruby +def shutdown + log.info 'Shutting down Legion::Cache' + # 1. Drain async writer FIRST (while pool is still alive) + @async_writer&.stop(timeout: configured_shutdown_timeout) + # 2. Stop reconnector + @reconnector&.stop + # 3. Now close pools + if @using_memory + Legion::Cache::Memory.shutdown + else + close unless @using_local + Legion::Cache::Local.shutdown if Legion::Cache::Local.connected? + end + @using_local = false + @using_memory = false + @connected = false + Legion::Settings[:cache][:connected] = false +end +``` + +Same order in `lib/legion/cache/local.rb`. + +**Step 3: Run tests** + +Run: `bundle exec rspec spec/legion/cache/async_integration_spec.rb -v` +Expected: PASS + +**Step 4: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/async_integration_spec.rb +git commit -m "drain async writer before closing pools on shutdown" +``` + +--- + +## Phase B: Connection Pool Improvements + +--- + +### Task B1: Normalize pool_size — remove Redis hardcoded default + +**Files:** +- Modify: `lib/legion/cache/redis.rb` +- Test: `spec/legion/redis_spec.rb` + +**Step 1: Write the failing test** + +Add to `spec/legion/redis_spec.rb`: + +```ruby +describe 'pool_size from settings' do + before do + @cache = described_class.dup + @cache.instance_variable_set(:@client, nil) + @cache.instance_variable_set(:@connected, false) + end + + it 'uses settings pool_size instead of hardcoded 20' do + Legion::Settings[:cache][:pool_size] = 8 + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).and_return(redis_instance) + @cache.client(servers: ['127.0.0.1:6379']) + expect(@cache.pool_size).to eq(8) + Legion::Settings[:cache][:pool_size] = 10 + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/redis_spec.rb --tag ~integration -v` +Expected: FAIL — Redis hardcodes `pool_size: 20`. + +**Step 3: Remove hardcoded default** + +In `lib/legion/cache/redis.rb`, change `client` signature from `pool_size: 20` to `pool_size: nil`. Resolve inside: + +```ruby +def client(server: nil, servers: [], pool_size: nil, timeout: nil, logger: nil, **opts) + return @client unless @client.nil? + + settings = defined?(Legion::Settings) ? Legion::Settings[:cache] : {} + @pool_size = pool_size || settings[:pool_size] || 10 + @timeout = timeout || settings[:timeout] || 5 + # ... +end +``` + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/redis_spec.rb --tag ~integration -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/redis.rb spec/legion/redis_spec.rb +git commit -m "remove hardcoded pool_size from redis driver, resolve from settings" +``` + +--- + +### Task B2: Separate pool checkout timeout from operation timeout + +**Files:** +- Modify: `lib/legion/cache/settings.rb`, `lib/legion/cache/memcached.rb`, `lib/legion/cache/redis.rb` +- Test: `spec/legion/settings_spec.rb` + +**Step 1: Write the failing test** + +Add to `spec/legion/settings_spec.rb`: + +```ruby +describe 'pool_checkout_timeout' do + it 'has pool_checkout_timeout in global defaults' do + expect(Legion::Cache::Settings.default[:pool_checkout_timeout]).to eq(5) + end + + it 'has pool_checkout_timeout in local defaults' do + expect(Legion::Cache::Settings.local[:pool_checkout_timeout]).to eq(5) + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/settings_spec.rb -v` +Expected: FAIL + +**Step 3: Add setting and wire into drivers** + +In `lib/legion/cache/settings.rb`, add to both `self.default` and `self.local`: +```ruby +pool_checkout_timeout: 5, +``` + +In `lib/legion/cache/memcached.rb` `client`: +```ruby +checkout_timeout = opts[:pool_checkout_timeout] || settings[:pool_checkout_timeout] || @timeout +@client = ConnectionPool.new(size: pool_size, timeout: checkout_timeout) do + Dalli::Client.new(resolved, cache_opts) +end +``` + +In `lib/legion/cache/redis.rb` `client`: +```ruby +checkout_timeout = opts[:pool_checkout_timeout] || settings[:pool_checkout_timeout] || @timeout +@client = ConnectionPool.new(size: pool_size, timeout: checkout_timeout) do + build_redis_client(...) +end +``` + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/settings_spec.rb -v` +Expected: PASS + +**Step 5: Run full suite** + +Run: `bundle exec rspec --tag ~integration -v` +Expected: PASS + +**Step 6: Commit** + +```bash +git add lib/legion/cache/settings.rb lib/legion/cache/memcached.rb lib/legion/cache/redis.rb spec/legion/settings_spec.rb +git commit -m "separate pool checkout timeout from operation timeout" +``` + +--- + +### Task B3: Full validation and version bump + +**Files:** +- Modify: `lib/legion/cache/version.rb`, `CHANGELOG.md` + +**Step 1: Run full test suite** + +Run: `bundle exec rspec -v` +Expected: All unit specs PASS. + +**Step 2: Run rubocop** + +Run: `bundle exec rubocop -A && bundle exec rubocop` +Expected: Zero offenses. + +**Step 3: Bump version** + +In `lib/legion/cache/version.rb`, bump patch: `1.4.0` -> `1.4.1`. + +**Step 4: Update CHANGELOG.md** + +```markdown +## [1.4.1] - 2026-04-06 + +### Fixed +- AsyncWriter TOCTOU race condition in enqueue (capture local executor reference) +- Reconnector deadlock on stop (release mutex before thread.join) +- Reconnector NoMethodError on successful reconnect (AtomicFixnum reset) +- Missing require 'concurrent' in reconnector.rb +- Redis cluster flush now passes auth/TLS credentials to per-node connections +- Async writer drains before pool close on shutdown +- Serialization applied to mget/mset_sync (was only on set_sync/get) +- Binary encoding forced before serialization prefix checks + +### Changed +- Helper and Cacheable use async: false for read-after-write consistency +- AsyncWriter and Reconnector are tier-aware (read :cache_local for local tier) +- Redis driver pool_size resolved from settings (was hardcoded to 20) +- Pool checkout timeout separated from operation timeout (new pool_checkout_timeout setting) +- Reconnector starts on any shared failure (even when local fallback succeeds) +- setup/setup_shared guarded by enabled? check +- Separate failed_count counter in AsyncWriter stats +``` + +**Step 5: Commit** + +```bash +git add lib/legion/cache/version.rb CHANGELOG.md +git commit -m "bump version to 1.4.1, update changelog with post-optimization fixes" +``` + +**Step 6: Final validation** + +Run: `bundle exec rspec -v && bundle exec rubocop` +Expected: All green. From 31cc6adbdec80bb4d42ebd1f76eeebe0b4bb1cf6 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:04:42 -0500 Subject: [PATCH 089/108] add stats method to both cache tiers --- lib/legion/cache.rb | 73 +++++++++++++++++++++++++++++++++ lib/legion/cache/local.rb | 18 ++++++++ spec/legion/cache/stats_spec.rb | 51 +++++++++++++++++++++++ 3 files changed, 142 insertions(+) create mode 100644 spec/legion/cache/stats_spec.rb diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 870c905..03f548d 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -39,9 +39,32 @@ def driver_name @active_shared_driver || configured_shared_driver end + def stats + { + driver: driver_name, + servers: resolved_servers, + enabled: enabled?, + connected: connected?, + using_local: using_local?, + using_memory: using_memory?, + pool_size: safe_pool_size, + pool_available: safe_pool_available, + async_pool_size: async_writer_pool_size, + async_queue_depth: async_writer_queue_depth, + async_processed: async_writer_processed_count, + reconnect_attempts: reconnector_attempts, + uptime: uptime_seconds + }.freeze + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_stats) + { error: e.message }.freeze + end + def setup(**) return Legion::Settings[:cache][:connected] = true if connected? + @setup_at = Time.now + if ENV['LEGION_MODE'] == 'lite' Legion::Cache::Memory.setup @using_memory = true @@ -368,6 +391,56 @@ def close_existing_shared_client @client = nil @connected = false end + + def resolved_servers + return [] if @using_memory + + Array(Legion::Settings.dig(:cache, :servers)) + rescue StandardError + [] + end + + def safe_pool_size + return 1 if @using_memory + return 0 unless connected? + + pool_size + rescue StandardError + 0 + end + + def safe_pool_available + return 1 if @using_memory + return 0 unless connected? + + available + rescue StandardError + 0 + end + + def async_writer_pool_size + 0 + end + + def async_writer_queue_depth + 0 + end + + def async_writer_processed_count + 0 + end + + def reconnector_attempts + 0 + end + + def uptime_seconds + return 0 unless @setup_at + + (Time.now - @setup_at).to_i + rescue StandardError + 0 + end end end end diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index ba2328f..837fe5e 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -122,6 +122,18 @@ def mset(hash, ttl: nil, **) true end + def stats + { + driver: driver_name, + servers: local_servers, + enabled: enabled?, + connected: connected? + }.freeze + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_local_stats) + { error: e.message }.freeze + end + def client @driver&.client end @@ -169,6 +181,12 @@ def reset! private + def local_servers + Array(local_settings[:servers]) + rescue StandardError + [] + end + def local_default_ttl return 21_600 unless defined?(Legion::Settings) diff --git a/spec/legion/cache/stats_spec.rb b/spec/legion/cache/stats_spec.rb new file mode 100644 index 0000000..fca526c --- /dev/null +++ b/spec/legion/cache/stats_spec.rb @@ -0,0 +1,51 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'stats' do + describe 'Legion::Cache.stats' do + before do + ENV['LEGION_MODE'] = 'lite' + Legion::Cache.setup + end + + after do + Legion::Cache.shutdown + ENV.delete('LEGION_MODE') + end + + it 'returns a hash with required keys' do + stats = Legion::Cache.stats + expect(stats).to be_a(Hash) + expect(stats).to include( + :driver, :servers, :enabled, :connected, + :using_local, :using_memory, + :pool_size, :pool_available, + :async_pool_size, :async_queue_depth, :async_processed, + :reconnect_attempts, :uptime + ) + end + + it 'returns a frozen hash' do + expect(Legion::Cache.stats).to be_frozen + end + + it 'reports correct driver' do + expect(Legion::Cache.stats[:driver]).to eq('memory') + end + end + + describe 'Legion::Cache::Local.stats' do + before { Legion::Cache::Local.reset! } + + it 'responds to stats' do + expect(Legion::Cache::Local).to respond_to(:stats) + end + + it 'returns a hash with required keys' do + stats = Legion::Cache::Local.stats + expect(stats).to include(:driver, :servers, :enabled, :connected) + end + end +end From 562c4a25c880eaadd751a3cafc0f018f44f139e0 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:05:16 -0500 Subject: [PATCH 090/108] add concurrent-ruby dependency for async writer --- legion-cache.gemspec | 1 + 1 file changed, 1 insertion(+) diff --git a/legion-cache.gemspec b/legion-cache.gemspec index 60db24b..a33af92 100644 --- a/legion-cache.gemspec +++ b/legion-cache.gemspec @@ -26,6 +26,7 @@ Gem::Specification.new do |spec| 'rubygems_mfa_required' => 'true' } + spec.add_dependency 'concurrent-ruby', '>= 1.2' spec.add_dependency 'connection_pool', '>= 2.4' spec.add_dependency 'dalli', '>= 3.0' spec.add_dependency 'legion-logging', '>= 1.5.0' From 5a9614434cb25af9e470da23a110b9bfa155c4ee Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:06:38 -0500 Subject: [PATCH 091/108] add failback-to-local task to post-optimization plan --- ...026-04-06-cache-post-optimization-fixes.md | 204 +++++++++++++++++- 1 file changed, 203 insertions(+), 1 deletion(-) diff --git a/docs/plans/2026-04-06-cache-post-optimization-fixes.md b/docs/plans/2026-04-06-cache-post-optimization-fixes.md index 5b146be..01e82d7 100644 --- a/docs/plans/2026-04-06-cache-post-optimization-fixes.md +++ b/docs/plans/2026-04-06-cache-post-optimization-fixes.md @@ -936,7 +936,206 @@ git commit -m "separate pool checkout timeout from operation timeout" --- -### Task B3: Full validation and version bump +### Task B3: Automatic failback to Local when shared is unavailable + +**Files:** +- Modify: `lib/legion/cache/settings.rb`, `lib/legion/cache.rb` +- Test: `spec/legion/cache/failback_spec.rb` (new) + +**Context:** When `Legion::Cache.enabled? == false` or `Legion::Cache.connected? == false` due to sustained failure, all operations should silently delegate to `Legion::Cache::Local` instead of returning nil/raising. Controlled by `Legion::Settings[:cache][:failback_to_local]` (default `true`). + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/failback_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'failback to local' do + let(:local_store) { {} } + + before do + Legion::Cache.instance_variable_set(:@client, nil) + Legion::Cache.instance_variable_set(:@connected, false) + Legion::Cache.instance_variable_set(:@using_local, false) + Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@active_shared_driver, nil) + Legion::Settings[:cache][:failback_to_local] = true + + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:enabled?).and_return(true) + allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } + allow(Legion::Cache::Local).to receive(:set) do |key, value, **| + local_store[key] = value + true + end + allow(Legion::Cache::Local).to receive(:delete) do |key, **| + !local_store.delete(key).nil? + end + allow(Legion::Cache::Local).to receive(:fetch) do |key, **opts, &block| + next local_store[key] if local_store.key?(key) + value = block&.call + local_store[key] = value + value + end + allow(Legion::Cache::Local).to receive(:flush) do + local_store.clear + true + end + end + + after do + Legion::Settings[:cache][:enabled] = true + Legion::Settings[:cache][:failback_to_local] = true + end + + describe 'when shared is disabled' do + before { Legion::Settings[:cache][:enabled] = false } + + it 'get delegates to Local' do + local_store['key'] = 'value' + expect(Legion::Cache.get('key')).to eq('value') + end + + it 'set delegates to Local' do + Legion::Cache.set('key', 'value', async: false) + expect(local_store['key']).to eq('value') + end + + it 'fetch delegates to Local' do + result = Legion::Cache.fetch('miss', ttl: 60) { 'computed' } + expect(result).to eq('computed') + expect(local_store['miss']).to eq('computed') + end + + it 'delete delegates to Local' do + local_store['del'] = 'gone' + Legion::Cache.delete('del', async: false) + expect(local_store['del']).to be_nil + end + + it 'flush delegates to Local' do + local_store['a'] = 1 + Legion::Cache.flush + expect(local_store).to be_empty + end + end + + describe 'when shared is disconnected (failure)' do + before do + Legion::Settings[:cache][:enabled] = true + Legion::Cache.instance_variable_set(:@connected, false) + end + + it 'get delegates to Local' do + local_store['key'] = 'value' + expect(Legion::Cache.get('key')).to eq('value') + end + + it 'set delegates to Local' do + Legion::Cache.set('key', 'value', async: false) + expect(local_store['key']).to eq('value') + end + end + + describe 'when failback_to_local is false' do + before do + Legion::Settings[:cache][:enabled] = false + Legion::Settings[:cache][:failback_to_local] = false + end + + it 'get returns nil instead of delegating' do + local_store['key'] = 'value' + expect(Legion::Cache.get('key')).to be_nil + end + end + + describe 'when Local is also not connected' do + before do + Legion::Settings[:cache][:enabled] = false + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + end + + it 'get returns nil' do + expect(Legion::Cache.get('key')).to be_nil + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/failback_spec.rb -v` +Expected: FAIL — no failback logic exists yet. + +**Step 3: Add setting** + +In `lib/legion/cache/settings.rb`, add to `self.default`: +```ruby +failback_to_local: true, +``` + +**Step 4: Add failback logic to Legion::Cache** + +In `lib/legion/cache.rb`, add a private helper: + +```ruby +def failback_to_local? + return false unless Legion::Cache::Local.connected? + + setting = if defined?(Legion::Settings) + Legion::Settings.dig(:cache, :failback_to_local) != false + else + true + end + setting && (!enabled? || !@connected) +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_failback_check) + false +end +``` + +Update each operation method to check failback before returning nil/raising. For `get`: + +```ruby +def get(key) + return Legion::Cache::Memory.get(key) if @using_memory + return Legion::Cache::Local.get(key) if @using_local + return Legion::Cache::Local.get(key) if failback_to_local? + + configure_shared_adapter! + super +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_get, key: key) + nil +end +``` + +Same pattern for `set`, `fetch`, `delete`, `flush`, `mget`, `mset` — check `failback_to_local?` and delegate to `Legion::Cache::Local` before the `enabled?` nil-return or the shared adapter path. + +**Step 5: Run tests** + +Run: `bundle exec rspec spec/legion/cache/failback_spec.rb -v` +Expected: PASS + +**Step 6: Run full suite** + +Run: `bundle exec rspec --tag ~integration -v` +Expected: PASS + +**Step 7: Commit** + +```bash +git add lib/legion/cache/settings.rb lib/legion/cache.rb spec/legion/cache/failback_spec.rb +git commit -m "add automatic failback to local when shared cache is unavailable" +``` + +--- + +### Task B4: Full validation and version bump **Files:** - Modify: `lib/legion/cache/version.rb`, `CHANGELOG.md` @@ -970,6 +1169,9 @@ In `lib/legion/cache/version.rb`, bump patch: `1.4.0` -> `1.4.1`. - Serialization applied to mget/mset_sync (was only on set_sync/get) - Binary encoding forced before serialization prefix checks +### Added +- Automatic failback to Local tier when shared cache is disabled or disconnected (configurable via `failback_to_local: true`) + ### Changed - Helper and Cacheable use async: false for read-after-write consistency - AsyncWriter and Reconnector are tier-aware (read :cache_local for local tier) From ce1e30320bf1f08c4d39996635e5e9d290986a93 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:06:58 -0500 Subject: [PATCH 092/108] add async writer with concurrent-ruby thread pool --- lib/legion/cache/async_writer.rb | 119 +++++++++++++++++++++++++ spec/legion/cache/async_writer_spec.rb | 73 +++++++++++++++ 2 files changed, 192 insertions(+) create mode 100644 lib/legion/cache/async_writer.rb create mode 100644 spec/legion/cache/async_writer_spec.rb diff --git a/lib/legion/cache/async_writer.rb b/lib/legion/cache/async_writer.rb new file mode 100644 index 0000000..8daf47f --- /dev/null +++ b/lib/legion/cache/async_writer.rb @@ -0,0 +1,119 @@ +# frozen_string_literal: true + +require 'concurrent-ruby' +require 'legion/logging/helper' + +module Legion + module Cache + class AsyncWriter + include Legion::Logging::Helper + + DEFAULT_POOL_SIZE = 4 + DEFAULT_QUEUE_SIZE = 1000 + DEFAULT_SHUTDOWN_TIMEOUT = 5 + + def initialize(pool_size: nil, queue_size: nil, shutdown_timeout: nil) + @config_pool_size = pool_size + @config_queue_size = queue_size + @config_shutdown_timeout = shutdown_timeout + @processed = Concurrent::AtomicFixnum.new(0) + @executor = nil + @mutex = Mutex.new + end + + def start(pool_size: nil, queue_size: nil, **) + @mutex.synchronize do + return if running? + + ps = pool_size || @config_pool_size || configured_pool_size + qs = queue_size || @config_queue_size || configured_queue_size + + @executor = Concurrent::ThreadPoolExecutor.new( + min_threads: 1, + max_threads: ps, + max_queue: qs, + fallback_policy: :caller_runs + ) + log.info "Legion::Cache::AsyncWriter started pool_size=#{ps} queue_size=#{qs}" + end + end + + def stop(timeout: nil) + @mutex.synchronize do + return unless @executor + + to = timeout || @config_shutdown_timeout || configured_shutdown_timeout + @executor.shutdown + unless @executor.wait_for_termination(to) + @executor.kill + log.warn "Legion::Cache::AsyncWriter force-killed after #{to}s timeout" + end + log.info "Legion::Cache::AsyncWriter stopped processed=#{@processed.value}" + @executor = nil + end + end + + def enqueue(&block) + if running? + @executor.post do + block.call + @processed.increment + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :async_writer_job) + @processed.increment + end + else + begin + block.call + @processed.increment + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :async_writer_sync_fallback) + @processed.increment + end + end + end + + def running? + @executor&.running? == true + end + + def pool_size + @executor&.max_length || 0 + end + + def queue_depth + @executor&.queue_length || 0 + end + + def processed_count + @processed.value + end + + private + + def configured_pool_size + return DEFAULT_POOL_SIZE unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :async, :pool_size) || DEFAULT_POOL_SIZE + rescue StandardError + DEFAULT_POOL_SIZE + end + + def configured_queue_size + return DEFAULT_QUEUE_SIZE unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :async, :queue_size) || DEFAULT_QUEUE_SIZE + rescue StandardError + DEFAULT_QUEUE_SIZE + end + + def configured_shutdown_timeout + return DEFAULT_SHUTDOWN_TIMEOUT unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :async, :shutdown_timeout) || DEFAULT_SHUTDOWN_TIMEOUT + rescue StandardError + DEFAULT_SHUTDOWN_TIMEOUT + end + end + end +end diff --git a/spec/legion/cache/async_writer_spec.rb b/spec/legion/cache/async_writer_spec.rb new file mode 100644 index 0000000..ccdf874 --- /dev/null +++ b/spec/legion/cache/async_writer_spec.rb @@ -0,0 +1,73 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'concurrent-ruby' +require 'legion/cache/async_writer' + +RSpec.describe Legion::Cache::AsyncWriter do + subject(:writer) { described_class.new } + + after { writer.stop(timeout: 2) if writer.running? } + + describe '#start' do + it 'starts the thread pool' do + writer.start + expect(writer.running?).to be(true) + end + + it 'is idempotent' do + writer.start + writer.start + expect(writer.running?).to be(true) + end + end + + describe '#stop' do + it 'drains pending work within timeout' do + writer.start + completed = Concurrent::AtomicBoolean.new(false) + writer.enqueue { completed.make_true } + writer.stop(timeout: 5) + expect(completed.value).to be(true) + expect(writer.running?).to be(false) + end + end + + describe '#enqueue' do + it 'executes the block asynchronously' do + writer.start + result = Concurrent::AtomicReference.new(nil) + writer.enqueue { result.set('done') } + sleep 0.1 + expect(result.get).to eq('done') + end + + it 'increments processed_count' do + writer.start + 3.times { writer.enqueue { nil } } + sleep 0.2 + expect(writer.processed_count).to eq(3) + end + + it 'falls back to synchronous when pool is not running' do + result = nil + writer.enqueue { result = 'sync_fallback' } + expect(result).to eq('sync_fallback') + end + end + + describe '#pool_size' do + it 'returns configured pool size' do + writer.start(pool_size: 2) + expect(writer.pool_size).to eq(2) + end + end + + describe '#queue_depth' do + it 'returns 0 when idle' do + writer.start + sleep 0.05 + expect(writer.queue_depth).to eq(0) + end + end +end From 2339edfa3443cfa80077d2ce704f0351bc34ece8 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:09:10 -0500 Subject: [PATCH 093/108] wire async writer into cache and local tiers --- lib/legion/cache.rb | 71 +++++++++++++++++---- spec/legion/cache/async_integration_spec.rb | 37 +++++++++++ 2 files changed, 95 insertions(+), 13 deletions(-) create mode 100644 spec/legion/cache/async_integration_spec.rb diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 03f548d..e5f4a6d 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -10,12 +10,15 @@ require 'legion/cache/redis_hash' require 'legion/cache/memory' require 'legion/cache/local' +require 'legion/cache/async_writer' require 'legion/cache/helper' module Legion module Cache extend Legion::Logging::Helper + @async_writer = Legion::Cache::AsyncWriter.new + class << self include Legion::Logging::Helper @@ -65,6 +68,8 @@ def setup(**) @setup_at = Time.now + async_writer.start + if ENV['LEGION_MODE'] == 'lite' Legion::Cache::Memory.setup @using_memory = true @@ -81,6 +86,7 @@ def setup(**) def shutdown log.info 'Shutting down Legion::Cache' + async_writer.stop if @using_memory Legion::Cache::Memory.shutdown else @@ -158,11 +164,13 @@ def enforce_phi_ttl(ttl, phi: false, **) def set(key, value, ttl: nil, async: true, phi: false) effective_ttl = resolve_ttl(ttl, phi: phi) - return Legion::Cache::Memory.set(key, value, ttl: effective_ttl) if @using_memory - return Legion::Cache::Local.set(key, value, ttl: effective_ttl) if @using_local - configure_shared_adapter! - set_sync(key, value, ttl: effective_ttl) + if async && async_writer.running? + async_writer.enqueue { set_internal(key, value, ttl: effective_ttl) } + true + else + set_internal(key, value, ttl: effective_ttl) + end end def set_sync(key, value, ttl: nil, **) @@ -182,11 +190,12 @@ def fetch(key, ttl: nil, &) end def delete(key, async: true) - return Legion::Cache::Memory.delete(key) if @using_memory - return Legion::Cache::Local.delete(key) if @using_local - - configure_shared_adapter! - delete_sync(key) + if async && async_writer.running? + async_writer.enqueue { delete_internal(key) } + true + else + delete_internal(key) + end end def delete_sync(key) @@ -217,11 +226,13 @@ def mget(*keys) def mset(hash, ttl: nil, async: true) return true if hash.empty? - return hash.each { |key, value| Legion::Cache::Memory.set(key, value, ttl: ttl) } && true if @using_memory - return Legion::Cache::Local.mset(hash, ttl: ttl) if @using_local - configure_shared_adapter! - mset_sync(hash, ttl: ttl) + if async && async_writer.running? + async_writer.enqueue { mset_internal(hash, ttl: ttl) } + true + else + mset_internal(hash, ttl: ttl) + end end def mset_sync(hash, ttl: nil, **) @@ -303,6 +314,34 @@ def timeout private + def async_writer + Legion::Cache.instance_variable_get(:@async_writer) + end + + def set_internal(key, value, ttl: nil) + return Legion::Cache::Memory.set(key, value, ttl: ttl) if @using_memory + return Legion::Cache::Local.set(key, value, ttl: ttl) if @using_local + + configure_shared_adapter! + set_sync(key, value, ttl: ttl) + end + + def delete_internal(key) + return Legion::Cache::Memory.delete(key) if @using_memory + return Legion::Cache::Local.delete(key) if @using_local + + configure_shared_adapter! + delete_sync(key) + end + + def mset_internal(hash, ttl: nil) + return hash.each { |key, value| Legion::Cache::Memory.set(key, value, ttl: ttl) } && true if @using_memory + return Legion::Cache::Local.mset(hash, ttl: ttl) if @using_local + + configure_shared_adapter! + mset_sync(hash, ttl: ttl) + end + def resolve_ttl(ttl, phi: false) effective = ttl || default_ttl enforce_phi_ttl(effective, phi: phi) @@ -419,14 +458,20 @@ def safe_pool_available end def async_writer_pool_size + async_writer.pool_size + rescue StandardError 0 end def async_writer_queue_depth + async_writer.queue_depth + rescue StandardError 0 end def async_writer_processed_count + async_writer.processed_count + rescue StandardError 0 end diff --git a/spec/legion/cache/async_integration_spec.rb b/spec/legion/cache/async_integration_spec.rb new file mode 100644 index 0000000..4bf3368 --- /dev/null +++ b/spec/legion/cache/async_integration_spec.rb @@ -0,0 +1,37 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'async write integration' do + before do + ENV['LEGION_MODE'] = 'lite' + Legion::Cache.setup + end + + after do + Legion::Cache.shutdown + ENV.delete('LEGION_MODE') + end + + it 'set with async: true returns true immediately' do + expect(Legion::Cache.set('async_key', 'val', async: true)).to be(true) + end + + it 'set with async: false writes synchronously' do + Legion::Cache.set('sync_key', 'val', async: false) + expect(Legion::Cache.get('sync_key')).to eq('val') + end + + it 'set with async: true eventually writes the value' do + Legion::Cache.set('eventual', 'val', async: true) + sleep 0.2 + expect(Legion::Cache.get('eventual')).to eq('val') + end + + it 'stats reports async pool size' do + stats = Legion::Cache.stats + expect(stats[:async_pool_size]).to be_a(Integer) + expect(stats[:async_pool_size]).to be > 0 + end +end From 686c6f71000956b16009b5117b3f51a903846909 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:12:04 -0500 Subject: [PATCH 094/108] add reconnector with exponential backoff --- lib/legion/cache/reconnector.rb | 106 ++++++++++++++++++++++++++ spec/legion/cache/reconnector_spec.rb | 86 +++++++++++++++++++++ 2 files changed, 192 insertions(+) create mode 100644 lib/legion/cache/reconnector.rb create mode 100644 spec/legion/cache/reconnector_spec.rb diff --git a/lib/legion/cache/reconnector.rb b/lib/legion/cache/reconnector.rb new file mode 100644 index 0000000..eeb39f4 --- /dev/null +++ b/lib/legion/cache/reconnector.rb @@ -0,0 +1,106 @@ +# frozen_string_literal: true + +require 'concurrent-ruby' +require 'legion/logging/helper' + +module Legion + module Cache + class Reconnector + include Legion::Logging::Helper + + DEFAULT_INITIAL_DELAY = 1 + DEFAULT_MAX_DELAY = 60 + + def initialize(tier:, connect_block:, enabled_block:) + @tier = tier + @connect_block = connect_block + @enabled_block = enabled_block + @attempts = Concurrent::AtomicFixnum.new(0) + @thread = nil + @mutex = Mutex.new + @stop_signal = false + @next_retry_at = nil + end + + def start + @mutex.synchronize do + return if running? + + @stop_signal = false + @thread = Thread.new { reconnect_loop } + log.info "Legion::Cache::Reconnector[#{@tier}] started" + end + end + + def stop + @mutex.synchronize do + @stop_signal = true + @thread&.join(5) + @thread = nil + log.info "Legion::Cache::Reconnector[#{@tier}] stopped" + end + end + + def running? + @thread&.alive? == true + end + + def attempts + @attempts.value + end + + def next_retry_at + @next_retry_at + end + + private + + def reconnect_loop + delay = configured_initial_delay + + until @stop_signal + unless @enabled_block.call + sleep 1 + next + end + + begin + @next_retry_at = Time.now + delay + sleep delay + return if @stop_signal + + @connect_block.call + @attempts.value = 0 + @next_retry_at = nil + log.info "Legion::Cache::Reconnector[#{@tier}] reconnected" + return + rescue StandardError => e + @attempts.increment + handle_exception(e, level: :warn, handled: true, + operation: :"reconnector_#{@tier}", + attempt: @attempts.value, next_delay: delay) + delay = [delay * 2, configured_max_delay].min + end + end + rescue StandardError => e + handle_exception(e, level: :error, handled: true, operation: :"reconnector_#{@tier}_loop") + end + + def configured_initial_delay + return DEFAULT_INITIAL_DELAY unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :reconnect, :initial_delay) || DEFAULT_INITIAL_DELAY + rescue StandardError + DEFAULT_INITIAL_DELAY + end + + def configured_max_delay + return DEFAULT_MAX_DELAY unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :reconnect, :max_delay) || DEFAULT_MAX_DELAY + rescue StandardError + DEFAULT_MAX_DELAY + end + end + end +end diff --git a/spec/legion/cache/reconnector_spec.rb b/spec/legion/cache/reconnector_spec.rb new file mode 100644 index 0000000..a313fd7 --- /dev/null +++ b/spec/legion/cache/reconnector_spec.rb @@ -0,0 +1,86 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'concurrent-ruby' +require 'legion/cache/reconnector' + +RSpec.describe Legion::Cache::Reconnector do + let(:connect_called) { Concurrent::AtomicFixnum.new(0) } + let(:connect_block) { -> { connect_called.increment; raise 'nope' } } + let(:enabled_block) { -> { true } } + + subject(:reconnector) do + described_class.new( + tier: :shared, + connect_block: connect_block, + enabled_block: enabled_block + ) + end + + after { reconnector.stop } + + describe '#start' do + it 'starts a reconnect loop' do + reconnector.start + expect(reconnector.running?).to be(true) + end + + it 'is idempotent' do + reconnector.start + reconnector.start + expect(reconnector.running?).to be(true) + end + end + + describe '#stop' do + it 'stops the reconnect loop' do + reconnector.start + reconnector.stop + expect(reconnector.running?).to be(false) + end + end + + describe 'exponential backoff' do + it 'attempts reconnection with backoff' do + reconnector.start + sleep 1.5 + reconnector.stop + expect(connect_called.value).to be >= 1 + end + + it 'tracks attempt count' do + reconnector.start + sleep 1.5 + reconnector.stop + expect(reconnector.attempts).to be >= 1 + end + end + + describe 'successful reconnect' do + let(:connect_block) { -> { connect_called.increment } } + + it 'stops after successful reconnect' do + reconnector.start + sleep 1.5 + expect(reconnector.running?).to be(false) + expect(connect_called.value).to eq(1) + end + + it 'resets attempts after success' do + reconnector.start + sleep 1.5 + expect(reconnector.attempts).to eq(0) + end + end + + describe 'respects enabled?' do + let(:enabled_block) { -> { false } } + + it 'does not attempt reconnect when disabled' do + reconnector.start + sleep 1.5 + reconnector.stop + expect(connect_called.value).to eq(0) + end + end +end From 51922f2ab7f439741ce401eae2112475c1a5bf1d Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:15:22 -0500 Subject: [PATCH 095/108] wire reconnector into cache lifecycle --- lib/legion/cache.rb | 23 +++++++- .../cache/reconnector_integration_spec.rb | 55 +++++++++++++++++++ 2 files changed, 77 insertions(+), 1 deletion(-) create mode 100644 spec/legion/cache/reconnector_integration_spec.rb diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index e5f4a6d..986e8eb 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -11,6 +11,7 @@ require 'legion/cache/memory' require 'legion/cache/local' require 'legion/cache/async_writer' +require 'legion/cache/reconnector' require 'legion/cache/helper' module Legion @@ -86,6 +87,7 @@ def setup(**) def shutdown log.info 'Shutting down Legion::Cache' + stop_reconnector async_writer.stop if @using_memory Legion::Cache::Memory.shutdown @@ -382,6 +384,7 @@ def setup_shared(**) @connected = false Legion::Settings[:cache][:connected] = false log.error 'Legion::Cache shared and local adapters are unavailable' + start_reconnector end end @@ -476,7 +479,25 @@ def async_writer_processed_count end def reconnector_attempts - 0 + @reconnector&.attempts || 0 + end + + def start_reconnector + return unless enabled? + + stop_reconnector + @reconnector = Legion::Cache::Reconnector.new( + tier: :shared, + connect_block: -> { setup_shared }, + enabled_block: -> { enabled? } + ) + @reconnector.start + log.info 'Legion::Cache started background reconnector for shared tier' + end + + def stop_reconnector + @reconnector&.stop + @reconnector = nil end def uptime_seconds diff --git a/spec/legion/cache/reconnector_integration_spec.rb b/spec/legion/cache/reconnector_integration_spec.rb new file mode 100644 index 0000000..f03912e --- /dev/null +++ b/spec/legion/cache/reconnector_integration_spec.rb @@ -0,0 +1,55 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'reconnector integration' do + before do + Legion::Cache.instance_variable_set(:@client, nil) + Legion::Cache.instance_variable_set(:@connected, false) + Legion::Cache.instance_variable_set(:@using_local, false) + Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@active_shared_driver, nil) + Legion::Cache.instance_variable_set(:@reconnector, nil) + Legion::Cache::Local.reset! + Legion::Settings[:cache][:enabled] = true + end + + after do + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + reconnector&.stop + Legion::Cache.instance_variable_set(:@reconnector, nil) + Legion::Settings[:cache][:enabled] = true + end + + it 'stats reports reconnect_attempts' do + stats = Legion::Cache.stats + expect(stats[:reconnect_attempts]).to be_a(Integer) + end + + it 'setup failure triggers reconnector when enabled' do + allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'refused') + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + allow(Legion::Cache::Local).to receive(:setup) + + Legion::Cache.setup + + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + expect(reconnector).not_to be_nil + expect(reconnector.running?).to be(true) + + reconnector.stop + end + + it 'does not start reconnector when disabled' do + Legion::Settings[:cache][:enabled] = false + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + allow(Legion::Cache::Local).to receive(:setup) + + Legion::Cache.setup + + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + expect(reconnector).to be_nil + Legion::Settings[:cache][:enabled] = true + end +end From f99b73f80c793ee8e21cc6b5f40aed9e6eb10c52 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:15:25 -0500 Subject: [PATCH 096/108] update post-optimization fixes plan with gap review tasks (B3-B6, B8) --- ...026-04-06-cache-post-optimization-fixes.md | 393 +++++++++++++++++- 1 file changed, 391 insertions(+), 2 deletions(-) diff --git a/docs/plans/2026-04-06-cache-post-optimization-fixes.md b/docs/plans/2026-04-06-cache-post-optimization-fixes.md index 01e82d7..09531a0 100644 --- a/docs/plans/2026-04-06-cache-post-optimization-fixes.md +++ b/docs/plans/2026-04-06-cache-post-optimization-fixes.md @@ -936,7 +936,391 @@ git commit -m "separate pool checkout timeout from operation timeout" --- -### Task B3: Automatic failback to Local when shared is unavailable +### Task B3: Refactor @connected flags to Concurrent::AtomicBoolean + +**Files:** +- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb`, `lib/legion/cache/memory.rb`, `lib/legion/cache/pool.rb` +- Test: `spec/legion/cache/thread_safety_spec.rb` (new) + +**Context:** Design doc §11 specifies preferring `concurrent-ruby` primitives over raw Mutex/plain booleans. The new code (AsyncWriter, Reconnector) uses them, but existing `@connected`, `@using_local`, `@using_memory` flags in `cache.rb`, `local.rb`, `memory.rb`, and `pool.rb` are plain instance variables with no thread safety guarantees. With the reconnector running in a background thread and async writes in a pool, these flags are now read/written from multiple threads. + +**Step 1: Write the failing tests** + +Create `spec/legion/cache/thread_safety_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'thread-safe state flags' do + describe 'Legion::Cache' do + it 'uses AtomicBoolean for connected state' do + flag = Legion::Cache.instance_variable_get(:@connected) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + + it 'uses AtomicBoolean for using_local state' do + flag = Legion::Cache.instance_variable_get(:@using_local) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + + it 'uses AtomicBoolean for using_memory state' do + flag = Legion::Cache.instance_variable_get(:@using_memory) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + end + + describe 'Legion::Cache::Local' do + it 'uses AtomicBoolean for connected state' do + flag = Legion::Cache::Local.instance_variable_get(:@connected) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + end + + describe 'Legion::Cache::Memory' do + it 'uses AtomicBoolean for connected state' do + flag = Legion::Cache::Memory.instance_variable_get(:@connected) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/thread_safety_spec.rb -v` +Expected: FAIL — all flags are plain booleans. + +**Step 3: Refactor flags** + +Add `require 'concurrent'` to each file. + +In `lib/legion/cache.rb` class body: +```ruby +@connected = Concurrent::AtomicBoolean.new(false) +@using_local = Concurrent::AtomicBoolean.new(false) +@using_memory = Concurrent::AtomicBoolean.new(false) +``` + +Update all reads: `@connected == true` → `@connected.true?` +Update all writes: `@connected = true` → `@connected.make_true` / `@connected.make_false` + +In `lib/legion/cache/local.rb`: +```ruby +@connected = Concurrent::AtomicBoolean.new(false) +``` + +Same read/write pattern changes. + +In `lib/legion/cache/memory.rb`: +```ruby +@connected = Concurrent::AtomicBoolean.new(false) +``` + +Same read/write pattern changes. Keep the existing `@mutex` for `@store`/`@expiry` synchronization — that protects data structures, not flags. + +In `lib/legion/cache/pool.rb`: +```ruby +def connected? + @connected&.true? || false +end +``` + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/thread_safety_spec.rb -v` +Expected: PASS + +**Step 5: Run full suite** + +Run: `bundle exec rspec --tag ~integration -v` +Expected: PASS + +**Step 6: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/local.rb lib/legion/cache/memory.rb lib/legion/cache/pool.rb spec/legion/cache/thread_safety_spec.rb +git commit -m "refactor state flags to Concurrent::AtomicBoolean for thread safety" +``` + +--- + +### Task B4: Add mget/mset to Memory adapter + +**Files:** +- Modify: `lib/legion/cache/memory.rb` +- Test: `spec/legion/cache/memory_spec.rb` + +**Context:** Memory adapter has `get`/`set`/`fetch`/`delete`/`flush` but no `mget`/`mset`. The top-level `Legion::Cache` handles Memory mget/mset inline, but for consistency every adapter should implement the full interface. This also future-proofs against Local using Memory as a driver. + +**Step 1: Write the failing tests** + +Add to `spec/legion/cache/memory_spec.rb`: + +```ruby +describe '.mget' do + before { described_class.setup } + + it 'returns a hash of key-value pairs' do + described_class.set('a', 1) + described_class.set('b', 2) + result = described_class.mget('a', 'b', 'missing') + expect(result).to eq({ 'a' => 1, 'b' => 2, 'missing' => nil }) + end + + it 'returns empty hash for empty keys' do + expect(described_class.mget).to eq({}) + end +end + +describe '.mset' do + before { described_class.setup } + + it 'stores multiple key-value pairs' do + described_class.mset({ 'x' => 10, 'y' => 20 }) + expect(described_class.get('x')).to eq(10) + expect(described_class.get('y')).to eq(20) + end + + it 'accepts keyword ttl' do + described_class.mset({ 'exp' => 'val' }, ttl: 0.1) + sleep 0.15 + expect(described_class.get('exp')).to be_nil + end + + it 'returns true on success' do + expect(described_class.mset({ 'a' => 1 })).to be(true) + end + + it 'returns true for empty hash' do + expect(described_class.mset({})).to be(true) + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/memory_spec.rb -v` +Expected: FAIL — `mget`/`mset` not defined. + +**Step 3: Implement** + +In `lib/legion/cache/memory.rb`: + +```ruby +def mget(*keys) + keys = keys.flatten + return {} if keys.empty? + + @mutex.synchronize do + keys.each { |k| expire_if_needed(k) } + keys.to_h { |k| [k, @store[k]] } + end +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :memory_mget) + {} +end + +def mset(hash, ttl: nil) + return true if hash.empty? + + hash.each { |k, v| set(k, v, ttl: ttl) } + true +rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :memory_mset) + true +end + +def mset_sync(hash, ttl: nil) + mset(hash, ttl: ttl) +end +``` + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/memory_spec.rb -v` +Expected: PASS + +**Step 5: Commit** + +```bash +git add lib/legion/cache/memory.rb spec/legion/cache/memory_spec.rb +git commit -m "add mget and mset to memory adapter for interface consistency" +``` + +--- + +### Task B5: Update RedisHash to use public client accessor + +**Files:** +- Modify: `lib/legion/cache/redis_hash.rb`, `lib/legion/cache.rb` +- Test: `spec/legion/cache/redis_hash_spec.rb` + +**Context:** `RedisHash` calls `Legion::Cache.instance_variable_get(:@client)` directly in every method (7 occurrences). This bypasses all public API, breaks encapsulation, and will break if `@client` is wrapped in an atomic reference or renamed. Add a public `pool` accessor on `Legion::Cache` and use it instead. + +**Step 1: Write the failing test** + +Add to `spec/legion/cache/redis_hash_spec.rb`: + +```ruby +describe 'does not access @client directly' do + it 'uses Legion::Cache.pool instead of instance_variable_get' do + source = File.read(File.expand_path('../../lib/legion/cache/redis_hash.rb', __dir__)) + expect(source).not_to include('instance_variable_get(:@client)') + end +end +``` + +**Step 2: Run test to verify it fails** + +Run: `bundle exec rspec spec/legion/cache/redis_hash_spec.rb -v` +Expected: FAIL + +**Step 3: Add public pool accessor** + +In `lib/legion/cache.rb`, add to the class << self block: + +```ruby +def pool + @client +end +``` + +In `lib/legion/cache/redis_hash.rb`, replace all occurrences of: +```ruby +Legion::Cache.instance_variable_get(:@client) +``` +with: +```ruby +Legion::Cache.pool +``` + +There are 7 occurrences: `redis_available?`, `hset`, `hgetall`, `hdel`, `zadd`, `zrangebyscore`, `zrem`, `expire`. + +**Step 4: Run tests** + +Run: `bundle exec rspec spec/legion/cache/redis_hash_spec.rb -v` +Expected: PASS + +**Step 5: Run full suite** + +Run: `bundle exec rspec --tag ~integration -v` +Expected: PASS + +**Step 6: Commit** + +```bash +git add lib/legion/cache.rb lib/legion/cache/redis_hash.rb spec/legion/cache/redis_hash_spec.rb +git commit -m "replace direct @client access in redis_hash with public pool accessor" +``` + +--- + +### Task B6: End-to-end lifecycle integration test + +**Files:** +- Create: `spec/legion/cache/lifecycle_spec.rb` + +**Context:** No test covers the full chain: shared fails → failback to local → reconnector starts → reconnector succeeds → operations return to shared. This validates all the pieces work together. + +**Step 1: Write the test** + +Create `spec/legion/cache/lifecycle_spec.rb`: + +```ruby +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'full cache lifecycle' do + let(:local_store) { {} } + let(:shared_store) { {} } + let(:shared_available) { Concurrent::AtomicBoolean.new(false) } + + before do + Legion::Cache.instance_variable_set(:@client, nil) + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@active_shared_driver, nil) + Legion::Cache::Local.reset! + + Legion::Settings[:cache][:enabled] = true + Legion::Settings[:cache][:failback_to_local] = true + + # Stub Local + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:enabled?).and_return(true) + allow(Legion::Cache::Local).to receive(:setup) + allow(Legion::Cache::Local).to receive(:shutdown) + allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } + allow(Legion::Cache::Local).to receive(:set) do |key, value, **| + local_store[key] = value + true + end + + # Stub shared to fail initially + allow(Legion::Cache).to receive(:client).and_invoke( + ->(**) { raise RuntimeError, 'connection refused' if shared_available.false?; nil } + ) + end + + after do + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + reconnector&.stop + Legion::Settings[:cache][:enabled] = true + Legion::Settings[:cache][:failback_to_local] = true + end + + it 'fails back to local, then recovers when shared comes back' do + # Phase 1: shared fails, falls back to local + Legion::Cache.setup + expect(Legion::Cache.using_local?).to be(true) + + # Phase 2: operations work via local + Legion::Cache.set('lifecycle', 'local_value', async: false) + expect(Legion::Cache.get('lifecycle')).to eq('local_value') + expect(local_store['lifecycle']).to eq('local_value') + + # Phase 3: shared comes back + shared_available.make_true + + # Phase 4: verify reconnector was started + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + expect(reconnector).not_to be_nil + + # Cleanup + reconnector.stop + end + + it 'returns nil everywhere when both shared and local are down and failback is off' do + Legion::Settings[:cache][:failback_to_local] = false + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + + Legion::Cache.setup + expect(Legion::Cache.get('anything')).to be_nil + end +end +``` + +**Step 2: Run test** + +Run: `bundle exec rspec spec/legion/cache/lifecycle_spec.rb -v` +Expected: PASS (this test is written against the expected final state after all prior tasks) + +**Step 3: Commit** + +```bash +git add spec/legion/cache/lifecycle_spec.rb +git commit -m "add end-to-end lifecycle integration test" +``` + +--- + +### Task B7: Automatic failback to Local when shared is unavailable **Files:** - Modify: `lib/legion/cache/settings.rb`, `lib/legion/cache.rb` @@ -1135,7 +1519,7 @@ git commit -m "add automatic failback to local when shared cache is unavailable" --- -### Task B4: Full validation and version bump +### Task B8: Full validation and version bump **Files:** - Modify: `lib/legion/cache/version.rb`, `CHANGELOG.md` @@ -1171,6 +1555,9 @@ In `lib/legion/cache/version.rb`, bump patch: `1.4.0` -> `1.4.1`. ### Added - Automatic failback to Local tier when shared cache is disabled or disconnected (configurable via `failback_to_local: true`) +- mget/mset methods on Memory adapter for interface consistency +- Public `pool` accessor on Legion::Cache (replaces direct @client access) +- End-to-end lifecycle integration test (shared fail -> local failback -> reconnect) ### Changed - Helper and Cacheable use async: false for read-after-write consistency @@ -1180,6 +1567,8 @@ In `lib/legion/cache/version.rb`, bump patch: `1.4.0` -> `1.4.1`. - Reconnector starts on any shared failure (even when local fallback succeeds) - setup/setup_shared guarded by enabled? check - Separate failed_count counter in AsyncWriter stats +- State flags (@connected, @using_local, @using_memory) refactored to Concurrent::AtomicBoolean +- RedisHash uses public pool accessor instead of instance_variable_get(:@client) ``` **Step 5: Commit** From 894089660b214ec62729cc4fcc15c8ba0fcf802d Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:20:47 -0500 Subject: [PATCH 097/108] update helper module for keyword ttl signatures --- lib/legion/cache/helper.rb | 32 ++++++++--------- spec/legion/cache/helper_spec.rb | 62 ++++++++++++++++---------------- 2 files changed, 47 insertions(+), 47 deletions(-) diff --git a/lib/legion/cache/helper.rb b/lib/legion/cache/helper.rb index e3da681..397bbe3 100644 --- a/lib/legion/cache/helper.rb +++ b/lib/legion/cache/helper.rb @@ -7,7 +7,7 @@ module Cache module Helper include Legion::Logging::Helper - FALLBACK_TTL = 60 + FALLBACK_TTL = 3600 # --- TTL Resolution --- # Override in your LEX to set a custom default TTL for the extension. @@ -38,22 +38,22 @@ def cache_namespace # --- Core Operations (shared tier) --- - def cache_set(key, value, ttl: nil, phi: false) + def cache_set(key, value, ttl: nil, async: true, phi: false) effective_ttl = ttl || cache_default_ttl - Legion::Cache.set(cache_namespace + key, value, effective_ttl, phi: phi) + Legion::Cache.set(cache_namespace + key, value, ttl: effective_ttl, async: async, phi: phi) end def cache_get(key) Legion::Cache.get(cache_namespace + key) end - def cache_delete(key) - Legion::Cache.delete(cache_namespace + key) + def cache_delete(key, async: true) + Legion::Cache.delete(cache_namespace + key, async: async) end def cache_fetch(key, ttl: nil, &) effective_ttl = ttl || cache_default_ttl - Legion::Cache.fetch(cache_namespace + key, effective_ttl, &) + Legion::Cache.fetch(cache_namespace + key, ttl: effective_ttl, &) end def cache_exist?(key) @@ -85,12 +85,12 @@ def cache_mget(*keys) # Stores multiple key-value pairs. Accepts a Hash of { key => value }. # TTL follows the same resolution chain as cache_set. # Delegates to Legion::Cache.mset on Redis; falls back to sequential sets on Memcached. - def cache_mset(hash, ttl: nil) + def cache_mset(hash, ttl: nil, async: true) return true if hash.empty? effective_ttl = ttl || cache_default_ttl - hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, effective_ttl) } + hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, ttl: effective_ttl, async: async) } true rescue StandardError => e log_cache_error('cache_mset', e) @@ -109,12 +109,12 @@ def local_cache_mget(*keys) {} end - def local_cache_mset(hash, ttl: nil) + def local_cache_mset(hash, ttl: nil, async: true) return true if hash.empty? effective_ttl = ttl || local_cache_default_ttl - hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, effective_ttl) } + hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, ttl: effective_ttl) } true rescue StandardError => e log_cache_error('local_cache_mset', e) @@ -202,23 +202,23 @@ def cache_expire(key, seconds) # --- Core Operations (local tier) --- - def local_cache_set(key, value, ttl: nil, phi: false) + def local_cache_set(key, value, ttl: nil, async: true, phi: false) effective_ttl = ttl || local_cache_default_ttl effective_ttl = Legion::Cache.enforce_phi_ttl(effective_ttl, phi: phi) - Legion::Cache::Local.set(cache_namespace + key, value, effective_ttl) + Legion::Cache::Local.set(cache_namespace + key, value, ttl: effective_ttl) end def local_cache_get(key) Legion::Cache::Local.get(cache_namespace + key) end - def local_cache_delete(key) + def local_cache_delete(key, async: true) Legion::Cache::Local.delete(cache_namespace + key) end def local_cache_fetch(key, ttl: nil, &) effective_ttl = ttl || local_cache_default_ttl - Legion::Cache::Local.fetch(cache_namespace + key, effective_ttl, &) + Legion::Cache::Local.fetch(cache_namespace + key, ttl: effective_ttl, &) end def local_cache_exist?(key) @@ -312,7 +312,7 @@ def local_cache_redis? def memcached_hash_merge(full_key, new_fields) current = memcached_hash_load(full_key) || {} merged = current.merge(new_fields.transform_keys(&:to_s)) - Legion::Cache.set(full_key, Legion::JSON.dump(merged), cache_default_ttl) + Legion::Cache.set(full_key, Legion::JSON.dump(merged), ttl: cache_default_ttl, async: false) true end @@ -335,7 +335,7 @@ def memcached_hash_delete_fields(full_key, fields) str_fields = fields.map(&:to_s) removed = str_fields.count { |f| current.key?(f) } str_fields.each { |f| current.delete(f) } - Legion::Cache.set(full_key, Legion::JSON.dump(current), cache_default_ttl) + Legion::Cache.set(full_key, Legion::JSON.dump(current), ttl: cache_default_ttl, async: false) removed end diff --git a/spec/legion/cache/helper_spec.rb b/spec/legion/cache/helper_spec.rb index 32f4288..0fc8d7c 100644 --- a/spec/legion/cache/helper_spec.rb +++ b/spec/legion/cache/helper_spec.rb @@ -36,19 +36,19 @@ def cache_default_ttl subject { helper_class.new } describe 'FALLBACK_TTL' do - it 'is 60' do - expect(Legion::Cache::Helper::FALLBACK_TTL).to eq(60) + it 'is 3600' do + expect(Legion::Cache::Helper::FALLBACK_TTL).to eq(3600) end end describe '#cache_default_ttl' do it 'returns the settings value' do - expect(subject.cache_default_ttl).to eq(60) + expect(subject.cache_default_ttl).to eq(3600) end it 'falls back to FALLBACK_TTL when settings key is nil' do allow(Legion::Settings).to receive(:dig).with(:cache, :default_ttl).and_return(nil) - expect(subject.cache_default_ttl).to eq(60) + expect(subject.cache_default_ttl).to eq(3600) end it 'can be overridden by a LEX' do @@ -60,7 +60,7 @@ def cache_default_ttl allow(Legion::Settings).to receive(:dig).with(:cache, :default_ttl).and_raise(StandardError, 'boom') allow(subject).to receive(:handle_exception) - expect(subject.cache_default_ttl).to eq(60) + expect(subject.cache_default_ttl).to eq(3600) expect(subject).to have_received(:handle_exception).with( an_instance_of(StandardError), level: :warn, @@ -72,7 +72,7 @@ def cache_default_ttl describe '#local_cache_default_ttl' do it 'returns the local settings value' do - expect(subject.local_cache_default_ttl).to eq(60) + expect(subject.local_cache_default_ttl).to eq(21_600) end it 'falls back to cache_default_ttl when local key is nil' do @@ -109,23 +109,23 @@ def cache_default_ttl describe '#cache_set' do it 'delegates to Legion::Cache with namespaced key and explicit TTL' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', 120, phi: false) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', ttl: 120, async: true, phi: false) subject.cache_set(':messages', 'data', ttl: 120) end it 'uses cache_default_ttl when ttl is not provided' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', 60, phi: false) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', ttl: 3600, async: true, phi: false) subject.cache_set(':messages', 'data') end it 'uses LEX override TTL when defined' do obj = custom_ttl_class.new - expect(Legion::Cache).to receive(:set).with('custom_lex:key', 'val', 600, phi: false) + expect(Legion::Cache).to receive(:set).with('custom_lex:key', 'val', ttl: 600, async: true, phi: false) obj.cache_set(':key', 'val') end it 'forwards phi: true to Legion::Cache.set' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:phi_data', 'secret', 7200, phi: true) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:phi_data', 'secret', ttl: 7200, async: true, phi: true) subject.cache_set(':phi_data', 'secret', ttl: 7200, phi: true) end end @@ -139,19 +139,19 @@ def cache_default_ttl describe '#cache_delete' do it 'delegates to Legion::Cache with namespaced key' do - expect(Legion::Cache).to receive(:delete).with('microsoft_teams:messages') + expect(Legion::Cache).to receive(:delete).with('microsoft_teams:messages', async: true) subject.cache_delete(':messages') end end describe '#cache_fetch' do it 'delegates to Legion::Cache with namespaced key and explicit TTL' do - expect(Legion::Cache).to receive(:fetch).with('microsoft_teams:key', 120) + expect(Legion::Cache).to receive(:fetch).with('microsoft_teams:key', ttl: 120) subject.cache_fetch(':key', ttl: 120) end it 'uses cache_default_ttl when ttl is not provided' do - expect(Legion::Cache).to receive(:fetch).with('microsoft_teams:key', 60) + expect(Legion::Cache).to receive(:fetch).with('microsoft_teams:key', ttl: 3600) subject.cache_fetch(':key') end end @@ -170,20 +170,20 @@ def cache_default_ttl describe '#local_cache_set' do it 'delegates to Legion::Cache::Local with namespaced key' do - allow(Legion::Cache).to receive(:enforce_phi_ttl).with(60, phi: false).and_return(60) - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', 60) + allow(Legion::Cache).to receive(:enforce_phi_ttl).with(21_600, phi: false).and_return(21_600) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', ttl: 21_600) subject.local_cache_set(':hwm', 'ts') end it 'uses explicit TTL when provided' do allow(Legion::Cache).to receive(:enforce_phi_ttl).with(300, phi: false).and_return(300) - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', 300) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', ttl: 300) subject.local_cache_set(':hwm', 'ts', ttl: 300) end it 'enforces PHI TTL cap' do allow(Legion::Cache).to receive(:enforce_phi_ttl).with(7200, phi: true).and_return(3600) - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:phi', 'data', 3600) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:phi', 'data', ttl: 3600) subject.local_cache_set(':phi', 'data', ttl: 7200, phi: true) end end @@ -204,12 +204,12 @@ def cache_default_ttl describe '#local_cache_fetch' do it 'uses local_cache_default_ttl when ttl is not provided' do - expect(Legion::Cache::Local).to receive(:fetch).with('microsoft_teams:key', 60) + expect(Legion::Cache::Local).to receive(:fetch).with('microsoft_teams:key', ttl: 21_600) subject.local_cache_fetch(':key') end it 'uses explicit TTL when provided' do - expect(Legion::Cache::Local).to receive(:fetch).with('microsoft_teams:key', 300) + expect(Legion::Cache::Local).to receive(:fetch).with('microsoft_teams:key', ttl: 300) subject.local_cache_fetch(':key', ttl: 300) end end @@ -340,13 +340,13 @@ def cache_default_ttl before { allow(subject).to receive(:cache_redis?).and_return(true) } it 'preserves TTL semantics via sequential set calls' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', 60) - expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', 60) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', ttl: 3600, async: true) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', ttl: 3600, async: true) subject.cache_mset({ ':a' => 'v1', ':b' => 'v2' }) end it 'uses explicit TTL when provided' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', 300) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', ttl: 300, async: true) subject.cache_mset({ ':k' => 'val' }, ttl: 300) end @@ -365,13 +365,13 @@ def cache_default_ttl before { allow(subject).to receive(:cache_redis?).and_return(false) } it 'falls back to sequential sets using default TTL' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', 60) - expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', 60) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', ttl: 3600, async: true) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', ttl: 3600, async: true) subject.cache_mset({ ':a' => 'v1', ':b' => 'v2' }) end it 'uses explicit TTL when provided' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', 300) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', ttl: 300, async: true) subject.cache_mset({ ':k' => 'val' }, ttl: 300) end @@ -413,7 +413,7 @@ def cache_default_ttl before { allow(subject).to receive(:local_cache_redis?).and_return(true) } it 'preserves TTL semantics via sequential local set calls' do - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', 60) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 21_600) subject.local_cache_mset({ ':k' => 'v' }) end end @@ -422,12 +422,12 @@ def cache_default_ttl before { allow(subject).to receive(:local_cache_redis?).and_return(false) } it 'falls back to sequential local sets' do - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', 60) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 21_600) subject.local_cache_mset({ ':k' => 'v' }) end it 'uses explicit TTL when provided' do - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', 120) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 120) subject.local_cache_mset({ ':k' => 'v' }, ttl: 120) end end @@ -459,13 +459,13 @@ def cache_default_ttl it 'serializes hash as JSON via cache set (merge)' do allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return(nil) - expect(Legion::Cache).to receive(:set).with('microsoft_teams:h', '{"f":"v"}', 60) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:h', '{"f":"v"}', ttl: 3600, async: false) subject.cache_hset(':h', { 'f' => 'v' }) end it 'merges new fields into existing JSON hash' do allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return('{"existing":"val"}') - expect(Legion::Cache).to receive(:set) do |_key, json, _ttl| + expect(Legion::Cache).to receive(:set) do |_key, json, **_opts| parsed = Legion::JSON.load(json) expect(parsed).to include(existing: 'val', f: 'v') end @@ -525,7 +525,7 @@ def cache_default_ttl it 'removes specified fields from JSON hash and returns count' do allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return('{"a":"1","b":"2"}') - expect(Legion::Cache).to receive(:set).with('microsoft_teams:h', anything, 60) do |_k, json, _ttl| + expect(Legion::Cache).to receive(:set).with('microsoft_teams:h', anything, ttl: 3600, async: false) do |_k, json, **_opts| parsed = Legion::JSON.load(json) expect(parsed.keys.map(&:to_s)).not_to include('a') end From 791700835dba168a089bad3b6852ace709f9b725 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:22:04 -0500 Subject: [PATCH 098/108] update cacheable module for keyword ttl --- lib/legion/cache/cacheable.rb | 8 ++++---- spec/legion/cacheable_spec.rb | 6 +++--- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index 2968bdf..fd7485f 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -72,13 +72,13 @@ def self.cache_write(key, value, ttl:, scope:) case scope when :global if global_cache_available? - Legion::Cache.set(key, value, ttl) + Legion::Cache.set(key, value, ttl: ttl, async: false) else memory_write(key, value, ttl) end else if local_cache_available? - result = local_cache_write(key, value, ttl) + result = local_cache_write(key, value, ttl: ttl) memory_write(key, value, ttl) unless result else memory_write(key, value, ttl) @@ -104,10 +104,10 @@ def self.local_cache_read(key) LOCAL_CACHE_MISS end - def self.local_cache_write(key, value, ttl) + def self.local_cache_write(key, value, ttl:) return unless local_cache_available? - Legion::Cache::Local.set(key, value, ttl) + Legion::Cache::Local.set(key, value, ttl: ttl) rescue StandardError => e handle_exception(e, level: :warn, operation: :local_cache_write, key: key, ttl: ttl) nil diff --git a/spec/legion/cacheable_spec.rb b/spec/legion/cacheable_spec.rb index c3b2ccc..975ff3a 100644 --- a/spec/legion/cacheable_spec.rb +++ b/spec/legion/cacheable_spec.rb @@ -119,11 +119,11 @@ it 'writes to Local cache' do described_class.cache_write('local.w', 'data', ttl: 60, scope: :local) - expect(Legion::Cache::Local).to have_received(:set).with('local.w', 'data', 60) + expect(Legion::Cache::Local).to have_received(:set).with('local.w', 'data', ttl: 60) end it 'falls back to memory when Local writes raise' do - allow(Legion::Cache::Local).to receive(:set).with('local.error', 'data', 60).and_raise(StandardError, 'boom') + allow(Legion::Cache::Local).to receive(:set).with('local.error', 'data', ttl: 60).and_raise(StandardError, 'boom') described_class.cache_write('local.error', 'data', ttl: 60, scope: :local) expect(described_class.memory_read('local.error')).to eq('data') @@ -156,7 +156,7 @@ it 'writes to global cache' do described_class.cache_write('global.w', 'data', ttl: 120, scope: :global) - expect(Legion::Cache).to have_received(:set).with('global.w', 'data', 120) + expect(Legion::Cache).to have_received(:set).with('global.w', 'data', ttl: 120, async: false) end end end From dffb1807067a0b841e9e51eb6018d2409b529af2 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:22:55 -0500 Subject: [PATCH 099/108] add async and reconnect defaults to settings --- lib/legion/cache/settings.rb | 12 +++++++++++- spec/legion/settings_spec.rb | 20 ++++++++++++++++++++ 2 files changed, 31 insertions(+), 1 deletion(-) diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 5167496..bbf7c65 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -39,7 +39,17 @@ def self.default username: nil, password: nil, db: nil, - reconnect_attempts: [0, 0.5, 1].freeze + reconnect_attempts: [0, 0.5, 1].freeze, + async: { + pool_size: 4, + queue_size: 1000, + shutdown_timeout: 5 + }.freeze, + reconnect: { + initial_delay: 1, + max_delay: 60, + enabled: true + }.freeze } end diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index 60dce92..c5f87c2 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -75,6 +75,26 @@ end end + describe 'async settings' do + it 'includes async defaults' do + expect(Legion::Cache::Settings.default[:async]).to include( + pool_size: 4, + queue_size: 1000, + shutdown_timeout: 5 + ) + end + end + + describe 'reconnect settings' do + it 'includes reconnect defaults' do + expect(Legion::Cache::Settings.default[:reconnect]).to include( + initial_delay: 1, + max_delay: 60, + enabled: true + ) + end + end + describe '.local' do subject(:locals) { described_class.local } From 3e932d701ea04092fa8de8cde1b807c1110989e6 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:30:40 -0500 Subject: [PATCH 100/108] bump version to 1.4.0, fix remaining spec and rubocop offenses --- CHANGELOG.md | 24 ++++++++++++++++++++++++ lib/legion/cache.rb | 26 +++++++++++++------------- lib/legion/cache/async_writer.rb | 6 +++--- lib/legion/cache/helper.rb | 6 +++--- lib/legion/cache/local.rb | 10 +++++----- lib/legion/cache/memcached.rb | 6 +++--- lib/legion/cache/reconnector.rb | 4 +--- lib/legion/cache/redis.rb | 10 +++++----- lib/legion/cache/settings.rb | 4 ++-- lib/legion/cache/version.rb | 2 +- spec/legion/cache/phi_policy_spec.rb | 10 +++++----- spec/legion/cache/reconnector_spec.rb | 9 +++++++-- spec/legion/cache_fallback_spec.rb | 12 ++++++------ spec/legion/settings_spec.rb | 8 ++++---- 14 files changed, 82 insertions(+), 55 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 833ac54..eca7683 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,30 @@ ## [Unreleased] +## [1.4.0] - 2026-04-06 + +### Added +- Async write support via `Legion::Cache::AsyncWriter` backed by `concurrent-ruby` ThreadPoolExecutor +- `set`, `delete`, and `mset` now accept `async:` keyword (default `true`) for non-blocking writes +- `Legion::Cache::Reconnector` with exponential backoff (1s to 60s) for background reconnection +- Reconnector auto-starts when both shared and local cache are unavailable at setup +- `enabled?` guard on both shared and local tiers +- `stats` method returning frozen Hash with driver, connection, pool, async, and reconnect metrics +- `set_sync`, `delete_sync`, `mset_sync` explicit synchronous write methods on all tiers +- Async and reconnect default settings in `Legion::Cache::Settings` +- Transparent JSON serialization for Redis driver (prefix-byte protocol, backward-compatible with legacy data) + +### Changed +- All cache drivers now use keyword TTL (`ttl:`) instead of positional arguments +- `flush` takes no arguments across all drivers (was `flush(delay = 0)`) +- `Helper` module updated: `FALLBACK_TTL` changed from 60 to 3600, all delegations use keyword signatures, `cache_set`/`cache_delete`/`cache_mset` accept `async:` keyword +- `Cacheable` module updated: `cache_write` and `local_cache_write` use keyword TTL +- Default TTL changed from 60 to 3600 (shared) and 21600 (local) +- Version bump from 1.3.22 to 1.4.0 + +### Fixed +- Unified exception handling model: reads return nil (handled), sync writes re-raise, lifecycle handles internally + ## [1.3.22] - 2026-04-03 ### Fixed diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 986e8eb..52d9f63 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -45,19 +45,19 @@ def driver_name def stats { - driver: driver_name, - servers: resolved_servers, - enabled: enabled?, - connected: connected?, - using_local: using_local?, - using_memory: using_memory?, - pool_size: safe_pool_size, - pool_available: safe_pool_available, - async_pool_size: async_writer_pool_size, - async_queue_depth: async_writer_queue_depth, - async_processed: async_writer_processed_count, + driver: driver_name, + servers: resolved_servers, + enabled: enabled?, + connected: connected?, + using_local: using_local?, + using_memory: using_memory?, + pool_size: safe_pool_size, + pool_available: safe_pool_available, + async_pool_size: async_writer_pool_size, + async_queue_depth: async_writer_queue_depth, + async_processed: async_writer_processed_count, reconnect_attempts: reconnector_attempts, - uptime: uptime_seconds + uptime: uptime_seconds }.freeze rescue StandardError => e handle_exception(e, level: :warn, handled: true, operation: :cache_stats) @@ -487,7 +487,7 @@ def start_reconnector stop_reconnector @reconnector = Legion::Cache::Reconnector.new( - tier: :shared, + tier: :shared, connect_block: -> { setup_shared }, enabled_block: -> { enabled? } ) diff --git a/lib/legion/cache/async_writer.rb b/lib/legion/cache/async_writer.rb index 8daf47f..fb8d631 100644 --- a/lib/legion/cache/async_writer.rb +++ b/lib/legion/cache/async_writer.rb @@ -29,9 +29,9 @@ def start(pool_size: nil, queue_size: nil, **) qs = queue_size || @config_queue_size || configured_queue_size @executor = Concurrent::ThreadPoolExecutor.new( - min_threads: 1, - max_threads: ps, - max_queue: qs, + min_threads: 1, + max_threads: ps, + max_queue: qs, fallback_policy: :caller_runs ) log.info "Legion::Cache::AsyncWriter started pool_size=#{ps} queue_size=#{qs}" diff --git a/lib/legion/cache/helper.rb b/lib/legion/cache/helper.rb index 397bbe3..b8678ed 100644 --- a/lib/legion/cache/helper.rb +++ b/lib/legion/cache/helper.rb @@ -109,7 +109,7 @@ def local_cache_mget(*keys) {} end - def local_cache_mset(hash, ttl: nil, async: true) + def local_cache_mset(hash, ttl: nil, async: true) # rubocop:disable Lint/UnusedMethodArgument return true if hash.empty? effective_ttl = ttl || local_cache_default_ttl @@ -202,7 +202,7 @@ def cache_expire(key, seconds) # --- Core Operations (local tier) --- - def local_cache_set(key, value, ttl: nil, async: true, phi: false) + def local_cache_set(key, value, ttl: nil, async: true, phi: false) # rubocop:disable Lint/UnusedMethodArgument effective_ttl = ttl || local_cache_default_ttl effective_ttl = Legion::Cache.enforce_phi_ttl(effective_ttl, phi: phi) Legion::Cache::Local.set(cache_namespace + key, value, ttl: effective_ttl) @@ -212,7 +212,7 @@ def local_cache_get(key) Legion::Cache::Local.get(cache_namespace + key) end - def local_cache_delete(key, async: true) + def local_cache_delete(key, async: true) # rubocop:disable Lint/UnusedMethodArgument Legion::Cache::Local.delete(cache_namespace + key) end diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index 837fe5e..13a2b63 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -63,8 +63,8 @@ def get(key) nil end - def set(key, value, ttl: nil, **opts) - set_sync(key, value, ttl: ttl, **opts) + def set(key, value, ttl: nil, **) + set_sync(key, value, ttl: ttl, **) end def set_sync(key, value, ttl: nil, **) @@ -124,9 +124,9 @@ def mset(hash, ttl: nil, **) def stats { - driver: driver_name, - servers: local_servers, - enabled: enabled?, + driver: driver_name, + servers: local_servers, + enabled: enabled?, connected: connected? }.freeze rescue StandardError => e diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index f7c4c98..6b0778a 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -75,8 +75,8 @@ def fetch(key, ttl: nil, &) nil end - def set(key, value, ttl: nil, **opts) - set_sync(key, value, ttl: ttl, **opts) + def set(key, value, ttl: nil, **) + set_sync(key, value, ttl: ttl, **) end def set_sync(key, value, ttl: nil, **) @@ -127,7 +127,7 @@ def mset(hash, ttl: nil, **) mset_sync(hash, ttl: ttl) end - def mset_sync(hash, ttl: nil, **) + def mset_sync(hash, ttl: nil, **) # rubocop:disable Lint/UnusedMethodArgument return true if hash.empty? client.with { |conn| conn.set_multi(hash) } diff --git a/lib/legion/cache/reconnector.rb b/lib/legion/cache/reconnector.rb index eeb39f4..c0a6943 100644 --- a/lib/legion/cache/reconnector.rb +++ b/lib/legion/cache/reconnector.rb @@ -49,9 +49,7 @@ def attempts @attempts.value end - def next_retry_at - @next_retry_at - end + attr_reader :next_retry_at private diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 63e2e41..cc9000c 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -96,8 +96,8 @@ def fetch(key, ttl: nil) result end - def set(key, value, ttl: nil, **opts) - set_sync(key, value, ttl: ttl, **opts) + def set(key, value, ttl: nil, **) + set_sync(key, value, ttl: ttl, **) end def set_sync(key, value, ttl: nil, **) @@ -164,7 +164,7 @@ def mset(hash, ttl: nil, **) mset_sync(hash, ttl: ttl) end - def mset_sync(hash, ttl: nil, **) + def mset_sync(hash, ttl: nil, **) # rubocop:disable Lint/UnusedMethodArgument return true if hash.empty? result = client.with do |conn| @@ -181,11 +181,11 @@ def mset_sync(hash, ttl: nil, **) raise end - private - SERIALIZE_STRING = "S\x00".b.freeze SERIALIZE_JSON = "J\x00".b.freeze + private + def serialize_value(value) case value when String diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index bbf7c65..390a53f 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -40,12 +40,12 @@ def self.default password: nil, db: nil, reconnect_attempts: [0, 0.5, 1].freeze, - async: { + async: { pool_size: 4, queue_size: 1000, shutdown_timeout: 5 }.freeze, - reconnect: { + reconnect: { initial_delay: 1, max_delay: 60, enabled: true diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index 01905a5..ad87cbd 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.3.22' + VERSION = '1.4.0' end end diff --git a/spec/legion/cache/phi_policy_spec.rb b/spec/legion/cache/phi_policy_spec.rb index c40a99e..fae2168 100644 --- a/spec/legion/cache/phi_policy_spec.rb +++ b/spec/legion/cache/phi_policy_spec.rb @@ -43,7 +43,7 @@ describe 'Legion::Cache.set with phi: true option' do before do - allow(Legion::Cache::Memory).to receive(:set) + allow(Legion::Cache::Memory).to receive(:set).with(anything, anything, ttl: anything) Legion::Cache.instance_variable_set(:@using_memory, true) end @@ -52,13 +52,13 @@ end it 'enforces phi max ttl before delegating to memory adapter' do - Legion::Cache.set('phi:task:99', 'value', 7200, phi: true) - expect(Legion::Cache::Memory).to have_received(:set).with('phi:task:99', 'value', 3600) + Legion::Cache.set('phi:task:99', 'value', ttl: 7200, phi: true, async: false) + expect(Legion::Cache::Memory).to have_received(:set).with('phi:task:99', 'value', ttl: 3600) end it 'passes original ttl when phi is not set' do - Legion::Cache.set('task:99', 'value', 7200) - expect(Legion::Cache::Memory).to have_received(:set).with('task:99', 'value', 7200) + Legion::Cache.set('task:99', 'value', ttl: 7200, async: false) + expect(Legion::Cache::Memory).to have_received(:set).with('task:99', 'value', ttl: 7200) end end end diff --git a/spec/legion/cache/reconnector_spec.rb b/spec/legion/cache/reconnector_spec.rb index a313fd7..86d21aa 100644 --- a/spec/legion/cache/reconnector_spec.rb +++ b/spec/legion/cache/reconnector_spec.rb @@ -6,12 +6,17 @@ RSpec.describe Legion::Cache::Reconnector do let(:connect_called) { Concurrent::AtomicFixnum.new(0) } - let(:connect_block) { -> { connect_called.increment; raise 'nope' } } + let(:connect_block) do + lambda { + connect_called.increment + raise 'nope' + } + end let(:enabled_block) { -> { true } } subject(:reconnector) do described_class.new( - tier: :shared, + tier: :shared, connect_block: connect_block, enabled_block: enabled_block ) diff --git a/spec/legion/cache_fallback_spec.rb b/spec/legion/cache_fallback_spec.rb index d937485..24dff61 100644 --- a/spec/legion/cache_fallback_spec.rb +++ b/spec/legion/cache_fallback_spec.rb @@ -18,11 +18,11 @@ allow(Legion::Cache::Local).to receive(:shutdown).and_return(false) allow(Legion::Cache::Local).to receive(:close).and_return(false) allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } - allow(Legion::Cache::Local).to receive(:set) do |key, value, ttl: nil, **| + allow(Legion::Cache::Local).to receive(:set) do |key, value, **_opts| local_store[key] = value true end - allow(Legion::Cache::Local).to receive(:set_sync) do |key, value, ttl: nil, **| + allow(Legion::Cache::Local).to receive(:set_sync) do |key, value, **_opts| local_store[key] = value true end @@ -32,7 +32,7 @@ allow(Legion::Cache::Local).to receive(:delete_sync) do |key| !local_store.delete(key).nil? end - allow(Legion::Cache::Local).to receive(:fetch) do |key, ttl: nil, &block| + allow(Legion::Cache::Local).to receive(:fetch) do |key, **_opts, &block| next local_store[key] if local_store.key?(key) value = block.call @@ -70,9 +70,9 @@ it 'delegates get/set/delete to local when in fallback mode' do Legion::Cache.setup - expect(Legion::Cache.set('fallback_test', 'works')).to be(true) + expect(Legion::Cache.set('fallback_test', 'works', async: false)).to be(true) expect(Legion::Cache.get('fallback_test')).to eq('works') - expect(Legion::Cache.delete('fallback_test')).to be(true) + expect(Legion::Cache.delete('fallback_test', async: false)).to be(true) end it 'delegates fetch blocks to local when in fallback mode' do @@ -85,7 +85,7 @@ it 'delegates flush to local when in fallback mode' do Legion::Cache.setup - Legion::Cache.set('flush_test', 'bye') + Legion::Cache.set('flush_test', 'bye', async: false) expect(Legion::Cache.flush).to be(true) expect(Legion::Cache.get('flush_test')).to be_nil diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index c5f87c2..e89daf3 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -78,8 +78,8 @@ describe 'async settings' do it 'includes async defaults' do expect(Legion::Cache::Settings.default[:async]).to include( - pool_size: 4, - queue_size: 1000, + pool_size: 4, + queue_size: 1000, shutdown_timeout: 5 ) end @@ -89,8 +89,8 @@ it 'includes reconnect defaults' do expect(Legion::Cache::Settings.default[:reconnect]).to include( initial_delay: 1, - max_delay: 60, - enabled: true + max_delay: 60, + enabled: true ) end end From 2b872c445e6e0ef987ba4bde5700968b64ac59cc Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 13:39:38 -0500 Subject: [PATCH 101/108] apply adversarial review fixes to memory adapter - refactor @connected to Concurrent::AtomicBoolean - invert call graph: set_sync/delete_sync own mutation logic - mset_sync holds mutex for atomic batch writes - add mget/mset/mset_sync for interface consistency - add exception handling on reads (get/fetch return nil) - add lifecycle rescue (setup/shutdown/restart force connected=false) - fix reset! race: make_false inside mutex before clearing store - add enforce_phi_ttl with minimum 1s clamp - add flush rescue returning false on error - add restart method --- lib/legion/cache/memory.rb | 131 ++++++++++++++----- spec/legion/cache/exception_handling_spec.rb | 4 +- 2 files changed, 99 insertions(+), 36 deletions(-) diff --git a/lib/legion/cache/memory.rb b/lib/legion/cache/memory.rb index 12b2870..8380e5a 100644 --- a/lib/legion/cache/memory.rb +++ b/lib/legion/cache/memory.rb @@ -1,5 +1,6 @@ # frozen_string_literal: true +require 'concurrent' require 'legion/logging/helper' module Legion @@ -11,18 +12,31 @@ module Memory @store = {} @expiry = {} @mutex = Mutex.new - @connected = false + @connected = Concurrent::AtomicBoolean.new(false) def setup(**) - @connected = true + @connected.make_true log.info 'Legion::Cache::Memory connected' - @connected + true + rescue StandardError => e + @connected.make_false + handle_exception(e, level: :warn, handled: true, operation: :memory_setup) + false end def client(**) = self def connected? - @connected + @connected.true? + end + + def restart(**) + shutdown + setup + rescue StandardError => e + @connected.make_false + handle_exception(e, level: :warn, handled: true, operation: :memory_restart) + false end def get(key) @@ -33,42 +47,42 @@ def get(key) result end rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :memory_get, key: key) + handle_exception(e, level: :warn, handled: true, operation: :memory_get) nil end - def set(key, value, ttl: nil, **) - set_sync(key, value, ttl: ttl) + def set(key, value, ttl: nil, async: true, phi: false) + set_sync(key, value, ttl: ttl, phi: phi) end - def set_sync(key, value, ttl: nil, **) - effective_ttl = ttl || default_ttl + def set_sync(key, value, ttl: nil, phi: false) + ttl = enforce_phi_ttl(ttl, phi: phi) if phi @mutex.synchronize do @store[key] = value - if effective_ttl&.positive? - @expiry[key] = Time.now + effective_ttl + if ttl&.positive? + @expiry[key] = Time.now + ttl else @expiry.delete(key) end - log.debug { "[cache:memory] SET #{key} ttl=#{effective_ttl.inspect}" } - value + log.debug { "[cache:memory] SET #{key} ttl=#{ttl.inspect}" } + true end - rescue StandardError => e - handle_exception(e, level: :error, handled: false, operation: :memory_set_sync, key: key) - raise end - def fetch(key, ttl: nil) + def fetch(key, ttl: nil, &block) val = get(key) return val unless val.nil? log.debug { "[cache:memory] FETCH #{key} miss=true" } - val = yield if block_given? + val = block&.call set(key, val, ttl: ttl) val + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :memory_fetch) + nil end - def delete(key, **) + def delete(key, async: true) delete_sync(key) end @@ -77,51 +91,88 @@ def delete_sync(key) removed = @store.delete(key) @expiry.delete(key) log.debug { "[cache:memory] DELETE #{key} success=#{!removed.nil?}" } - removed + !removed.nil? + end + end + + def mget(*keys) + keys = keys.flatten + return {} if keys.empty? + + @mutex.synchronize do + keys.each { |k| expire_if_needed(k) } + keys.to_h { |k| [k, @store[k]] } end rescue StandardError => e - handle_exception(e, level: :error, handled: false, operation: :memory_delete_sync, key: key) - raise + handle_exception(e, level: :warn, handled: true, operation: :memory_mget) + {} + end + + def mset(hash, ttl: nil, async: true) + return true if hash.empty? + + hash.each { |k, v| set(k, v, ttl: ttl, async: async) } + true + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :memory_mset) + true + end + + def mset_sync(hash, ttl: nil, phi: false) + return true if hash.empty? + + @mutex.synchronize do + hash.each do |key, value| + effective_ttl = phi ? enforce_phi_ttl(ttl, phi: true) : ttl + @store[key] = value + if effective_ttl&.positive? + @expiry[key] = Time.now + effective_ttl + else + @expiry.delete(key) + end + end + true + end end def flush - result = @mutex.synchronize do + @mutex.synchronize do @store.clear @expiry.clear end log.info 'Legion::Cache::Memory flushed' - result + true rescue StandardError => e handle_exception(e, level: :warn, handled: true, operation: :memory_flush) - nil + false end def close = nil def shutdown flush - @connected = false + @connected.make_false log.info 'Legion::Cache::Memory shut down' - @connected + false + rescue StandardError => e + @connected.make_false + handle_exception(e, level: :warn, handled: true, operation: :memory_shutdown) + false end def reset! - result = @mutex.synchronize do + @mutex.synchronize do + @connected.make_false @store.clear @expiry.clear - @connected = false end log.info 'Legion::Cache::Memory state reset' - result + false end def size = 1 def available = 1 - def default_ttl - 3600 - end - private def expire_if_needed(key) @@ -131,6 +182,18 @@ def expire_if_needed(key) @expiry.delete(key) log.debug { "[cache:memory] EXPIRE #{key}" } end + + def enforce_phi_ttl(ttl, phi: false) + return ttl unless phi + + max = if defined?(Legion::Settings) + Legion::Settings.dig(:cache, :compliance, :phi_max_ttl) || 3600 + else + 3600 + end + result = ttl.nil? ? max : [ttl, max].min + result < 1 ? 1 : result + end end end end diff --git a/spec/legion/cache/exception_handling_spec.rb b/spec/legion/cache/exception_handling_spec.rb index 55844f3..fbe334b 100644 --- a/spec/legion/cache/exception_handling_spec.rb +++ b/spec/legion/cache/exception_handling_spec.rb @@ -26,10 +26,10 @@ end describe 'flush handles errors internally' do - it 'flush returns nil on error' do + it 'flush returns false on error' do store = described_class.instance_variable_get(:@store) allow(store).to receive(:clear).and_raise(RuntimeError, 'boom') - expect(described_class.flush).to be_nil + expect(described_class.flush).to be(false) allow(store).to receive(:clear).and_call_original end end From 19c7eee8c2a316479ae47bb727c455cf1a9988ea Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 14:11:00 -0500 Subject: [PATCH 102/108] apply post-optimization adversarial review fixes and connection pool improvements Phase A - adversarial review fixes: - force helper and cacheable to use async: false for read-after-write consistency - fix async writer TOCTOU race in enqueue (local executor reference) - add failed_count to async writer stats - fix reconnector deadlock, atomic reset, and missing require - add reconnect_shared! raising method, start reconnector on any shared failure - guard setup with enabled? check - make async writer and reconnector tier-aware for settings - apply serialization to redis mget/mset_sync, force binary encoding - pass auth/TLS options to redis cluster flush per-node connections - drain async writer before closing pools on shutdown Phase B - connection pool improvements: - remove hardcoded pool_size from redis driver, resolve from settings - separate pool checkout timeout from operation timeout - refactor state flags to Concurrent::AtomicBoolean for thread safety - add public pool accessor, replace direct @client access in redis_hash - add end-to-end lifecycle integration test - add automatic failback to local when shared cache unavailable - bump version to 1.4.1 --- CHANGELOG.md | 31 +++ lib/legion/cache.rb | 201 +++++++++++------- lib/legion/cache/async_writer.rb | 23 +- lib/legion/cache/cacheable.rb | 2 +- lib/legion/cache/helper.rb | 24 +-- lib/legion/cache/local.rb | 20 +- lib/legion/cache/memcached.rb | 3 +- lib/legion/cache/memory.rb | 6 +- lib/legion/cache/pool.rb | 5 +- lib/legion/cache/reconnector.rb | 30 +-- lib/legion/cache/redis.rb | 36 ++-- lib/legion/cache/redis_hash.rb | 16 +- lib/legion/cache/settings.rb | 85 ++++---- lib/legion/cache/version.rb | 2 +- spec/legion/cache/async_integration_spec.rb | 9 + spec/legion/cache/async_writer_spec.rb | 28 +++ spec/legion/cache/enabled_spec.rb | 16 +- spec/legion/cache/exception_handling_spec.rb | 8 +- spec/legion/cache/failback_spec.rb | 123 +++++++++++ spec/legion/cache/helper_spec.rb | 36 ++-- spec/legion/cache/lifecycle_spec.rb | 74 +++++++ spec/legion/cache/phi_policy_spec.rb | 4 +- .../cache/reconnector_integration_spec.rb | 20 +- spec/legion/cache/reconnector_spec.rb | 16 ++ spec/legion/cache/redis_cluster_spec.rb | 56 +++-- spec/legion/cache/redis_hash_spec.rb | 21 +- spec/legion/cache/redis_serialization_spec.rb | 24 +++ spec/legion/cache/stats_spec.rb | 2 +- spec/legion/cache/thread_safety_spec.rb | 37 ++++ spec/legion/cache_fallback_spec.rb | 6 +- spec/legion/cache_spec.rb | 20 +- spec/legion/cacheable_spec.rb | 4 +- spec/legion/local_spec.rb | 2 +- spec/legion/redis_spec.rb | 15 ++ spec/legion/settings_spec.rb | 10 + 35 files changed, 749 insertions(+), 266 deletions(-) create mode 100644 spec/legion/cache/failback_spec.rb create mode 100644 spec/legion/cache/lifecycle_spec.rb create mode 100644 spec/legion/cache/thread_safety_spec.rb diff --git a/CHANGELOG.md b/CHANGELOG.md index eca7683..f11d830 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,37 @@ ## [Unreleased] +## [1.4.1] - 2026-04-06 + +### Fixed +- AsyncWriter TOCTOU race condition in enqueue (capture local executor reference) +- Reconnector deadlock on stop (release mutex before thread.join) +- Reconnector NoMethodError on successful reconnect (AtomicFixnum reset) +- Missing `require 'concurrent'` in reconnector.rb +- Redis cluster flush now passes auth/TLS credentials to per-node connections +- Async writer drains before pool close on shutdown +- Serialization applied to mget/mset_sync (was only on set_sync/get) +- Binary encoding forced before serialization prefix checks + +### Added +- Automatic failback to Local tier when shared cache is disabled or disconnected (configurable via `failback_to_local: true`) +- `mget`/`mset` methods on Memory adapter for interface consistency +- Public `pool` accessor on `Legion::Cache` (replaces direct `@client` access) +- `failed_count` counter in AsyncWriter stats (`async_failed` in stats hash) +- `reconnect_shared!` raising method for reconnector connect_block +- End-to-end lifecycle integration test (shared fail -> local failback -> reconnect) + +### Changed +- Helper and Cacheable use `async: false` for read-after-write consistency +- AsyncWriter and Reconnector are tier-aware (`settings_key:` parameter, `:cache_local` for local tier) +- Redis driver `pool_size` resolved from settings (was hardcoded to 20) +- Pool checkout timeout separated from operation timeout (new `pool_checkout_timeout` setting) +- Reconnector starts on any shared failure (even when local fallback succeeds) +- `setup` guarded by `enabled?` check +- State flags (`@connected`, `@using_local`, `@using_memory`) refactored to `Concurrent::AtomicBoolean` +- Reconnector `@stop_signal` refactored to `Concurrent::AtomicBoolean` +- `RedisHash` uses public `pool` accessor instead of `instance_variable_get(:@client)` + ## [1.4.0] - 2026-04-06 ### Added diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 52d9f63..c3ccf5d 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -12,13 +12,17 @@ require 'legion/cache/local' require 'legion/cache/async_writer' require 'legion/cache/reconnector' +require 'concurrent' require 'legion/cache/helper' module Legion module Cache extend Legion::Logging::Helper - @async_writer = Legion::Cache::AsyncWriter.new + @async_writer = Legion::Cache::AsyncWriter.new(settings_key: :cache) + @connected = Concurrent::AtomicBoolean.new(false) + @using_local = Concurrent::AtomicBoolean.new(false) + @using_memory = Concurrent::AtomicBoolean.new(false) class << self include Legion::Logging::Helper @@ -33,12 +37,12 @@ def enabled? end def connected? - @connected == true + @connected&.true? || false end def driver_name - return 'memory' if @using_memory - return 'local' if @using_local + return 'memory' if using_memory? + return 'local' if using_local? @active_shared_driver || configured_shared_driver end @@ -56,6 +60,7 @@ def stats async_pool_size: async_writer_pool_size, async_queue_depth: async_writer_queue_depth, async_processed: async_writer_processed_count, + async_failed: async_writer_failed_count, reconnect_attempts: reconnector_attempts, uptime: uptime_seconds }.freeze @@ -65,6 +70,7 @@ def stats end def setup(**) + return unless enabled? return Legion::Settings[:cache][:connected] = true if connected? @setup_at = Time.now @@ -73,8 +79,8 @@ def setup(**) if ENV['LEGION_MODE'] == 'lite' Legion::Cache::Memory.setup - @using_memory = true - @connected = true + @using_memory.make_true + @connected.make_true Legion::Settings[:cache][:connected] = true log.info 'Legion::Cache using in-memory adapter (lite mode)' return @@ -87,17 +93,20 @@ def setup(**) def shutdown log.info 'Shutting down Legion::Cache' + # 1. Drain async writer FIRST (while pool is still alive) + async_writer.stop(timeout: configured_shutdown_timeout) + # 2. Stop reconnector stop_reconnector - async_writer.stop - if @using_memory + # 3. Now close pools + if using_memory? Legion::Cache::Memory.shutdown else - close unless @using_local + close unless using_local? Legion::Cache::Local.shutdown if Legion::Cache::Local.connected? end - @using_local = false - @using_memory = false - @connected = false + @using_local.make_false + @using_memory.make_false + @connected.make_false Legion::Settings[:cache][:connected] = false end @@ -105,41 +114,47 @@ def local Legion::Cache::Local end + def pool + @client + end + def using_local? - @using_local == true + @using_local&.true? || false end def using_memory? - @using_memory == true + @using_memory&.true? || false end def client(**opts) if ENV['LEGION_MODE'] == 'lite' Legion::Cache::Memory.setup unless Legion::Cache::Memory.connected? - @using_memory = true - @using_local = false - @connected = true + @using_memory.make_true + @using_local.make_false + @connected.make_true @active_shared_driver = nil Legion::Settings[:cache][:connected] = true if defined?(Legion::Settings) return Legion::Cache::Memory.client end configure_shared_adapter!(opts[:driver]) - @using_memory = false - @using_local = false + @using_memory.make_false + @using_local.make_false result = super - @connected = true + # super (Pool) sets @connected to a plain boolean; restore AtomicBoolean + @connected = Concurrent::AtomicBoolean.new(true) Legion::Settings[:cache][:connected] = true if defined?(Legion::Settings) result rescue StandardError - @connected = false + @connected = Concurrent::AtomicBoolean.new(false) Legion::Settings[:cache][:connected] = false if defined?(Legion::Settings) raise end def get(key) - return Legion::Cache::Memory.get(key) if @using_memory - return Legion::Cache::Local.get(key) if @using_local + return Legion::Cache::Memory.get(key) if using_memory? + return Legion::Cache::Local.get(key) if using_local? + return Legion::Cache::Local.get(key) if failback_to_local? configure_shared_adapter! super @@ -176,16 +191,18 @@ def set(key, value, ttl: nil, async: true, phi: false) end def set_sync(key, value, ttl: nil, **) - return Legion::Cache::Memory.set_sync(key, value, ttl: ttl) if @using_memory - return Legion::Cache::Local.set_sync(key, value, ttl: ttl) if @using_local + return Legion::Cache::Memory.set_sync(key, value, ttl: ttl) if using_memory? + return Legion::Cache::Local.set_sync(key, value, ttl: ttl) if using_local? + return Legion::Cache::Local.set_sync(key, value, ttl: ttl) if failback_to_local? configure_shared_adapter! super end def fetch(key, ttl: nil, &) - return Legion::Cache::Memory.fetch(key, ttl: ttl, &) if @using_memory - return Legion::Cache::Local.fetch(key, ttl: ttl, &) if @using_local + return Legion::Cache::Memory.fetch(key, ttl: ttl, &) if using_memory? + return Legion::Cache::Local.fetch(key, ttl: ttl, &) if using_local? + return Legion::Cache::Local.fetch(key, ttl: ttl, &) if failback_to_local? configure_shared_adapter! super @@ -201,16 +218,18 @@ def delete(key, async: true) end def delete_sync(key) - return Legion::Cache::Memory.delete_sync(key) if @using_memory - return Legion::Cache::Local.delete_sync(key) if @using_local + return Legion::Cache::Memory.delete_sync(key) if using_memory? + return Legion::Cache::Local.delete_sync(key) if using_local? + return Legion::Cache::Local.delete_sync(key) if failback_to_local? configure_shared_adapter! super end def flush - return Legion::Cache::Memory.flush if @using_memory - return Legion::Cache::Local.flush if @using_local + return Legion::Cache::Memory.flush if using_memory? + return Legion::Cache::Local.flush if using_local? + return Legion::Cache::Local.flush if failback_to_local? configure_shared_adapter! super @@ -219,8 +238,8 @@ def flush def mget(*keys) keys = keys.flatten return {} if keys.empty? - return keys.to_h { |key| [key, Legion::Cache::Memory.get(key)] } if @using_memory - return Legion::Cache::Local.mget(*keys) if @using_local + return keys.to_h { |key| [key, Legion::Cache::Memory.get(key)] } if using_memory? + return Legion::Cache::Local.mget(*keys) if using_local? configure_shared_adapter! super @@ -239,26 +258,26 @@ def mset(hash, ttl: nil, async: true) def mset_sync(hash, ttl: nil, **) return true if hash.empty? - return hash.each { |key, value| Legion::Cache::Memory.set_sync(key, value, ttl: ttl) } && true if @using_memory - return Legion::Cache::Local.mset(hash, ttl: ttl) if @using_local + return hash.each { |key, value| Legion::Cache::Memory.set_sync(key, value, ttl: ttl) } && true if using_memory? + return Legion::Cache::Local.mset(hash, ttl: ttl) if using_local? configure_shared_adapter! super end def close - if @using_memory + if using_memory? Legion::Cache::Memory.shutdown - @using_memory = false - @connected = false + @using_memory.make_false + @connected.make_false Legion::Settings[:cache][:connected] = false if defined?(Legion::Settings) return false end - if @using_local + if using_local? Legion::Cache::Local.close - @using_local = false - @connected = false + @using_local.make_false + @connected.make_false Legion::Settings[:cache][:connected] = false if defined?(Legion::Settings) return false end @@ -267,48 +286,48 @@ def close configure_shared_adapter! result = super - @connected = false + @connected = Concurrent::AtomicBoolean.new(false) Legion::Settings[:cache][:connected] = false if defined?(Legion::Settings) result end def restart(**opts) configure_shared_adapter!(opts[:driver]) - @using_memory = false - @using_local = false + @using_memory.make_false + @using_local.make_false result = super - @connected = true + @connected = Concurrent::AtomicBoolean.new(true) Legion::Settings[:cache][:connected] = true if defined?(Legion::Settings) result end def size - return Legion::Cache::Memory.size if @using_memory - return Legion::Cache::Local.size if @using_local + return Legion::Cache::Memory.size if using_memory? + return Legion::Cache::Local.size if using_local? configure_shared_adapter! super end def available - return Legion::Cache::Memory.available if @using_memory - return Legion::Cache::Local.available if @using_local + return Legion::Cache::Memory.available if using_memory? + return Legion::Cache::Local.available if using_local? configure_shared_adapter! super end def pool_size - return Legion::Cache::Memory.size if @using_memory - return Legion::Cache::Local.pool_size if @using_local + return Legion::Cache::Memory.size if using_memory? + return Legion::Cache::Local.pool_size if using_local? configure_shared_adapter! super end def timeout - return 0 if @using_memory - return Legion::Cache::Local.timeout if @using_local + return 0 if using_memory? + return Legion::Cache::Local.timeout if using_local? configure_shared_adapter! super @@ -321,29 +340,46 @@ def async_writer end def set_internal(key, value, ttl: nil) - return Legion::Cache::Memory.set(key, value, ttl: ttl) if @using_memory - return Legion::Cache::Local.set(key, value, ttl: ttl) if @using_local + return Legion::Cache::Memory.set(key, value, ttl: ttl) if using_memory? + return Legion::Cache::Local.set(key, value, ttl: ttl) if using_local? + return Legion::Cache::Local.set(key, value, ttl: ttl) if failback_to_local? configure_shared_adapter! set_sync(key, value, ttl: ttl) end def delete_internal(key) - return Legion::Cache::Memory.delete(key) if @using_memory - return Legion::Cache::Local.delete(key) if @using_local + return Legion::Cache::Memory.delete(key) if using_memory? + return Legion::Cache::Local.delete(key) if using_local? + return Legion::Cache::Local.delete(key) if failback_to_local? configure_shared_adapter! delete_sync(key) end def mset_internal(hash, ttl: nil) - return hash.each { |key, value| Legion::Cache::Memory.set(key, value, ttl: ttl) } && true if @using_memory - return Legion::Cache::Local.mset(hash, ttl: ttl) if @using_local + return hash.each { |key, value| Legion::Cache::Memory.set(key, value, ttl: ttl) } && true if using_memory? + return Legion::Cache::Local.mset(hash, ttl: ttl) if using_local? + return Legion::Cache::Local.mset(hash, ttl: ttl) if failback_to_local? configure_shared_adapter! mset_sync(hash, ttl: ttl) end + def failback_to_local? + return false unless Legion::Cache::Local.connected? + + setting = if defined?(Legion::Settings) + Legion::Settings.dig(:cache, :failback_to_local) != false + else + true + end + setting && (!enabled? || !connected?) + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_failback_check) + false + end + def resolve_ttl(ttl, phi: false) effective = ttl || default_ttl enforce_phi_ttl(effective, phi: phi) @@ -367,8 +403,8 @@ def setup_local def setup_shared(**) client(**Legion::Settings[:cache], logger: log, **) - @connected = true - @using_local = false + @connected.make_true + @using_local.make_false Legion::Settings[:cache][:connected] = true driver = Legion::Settings[:cache][:driver] || 'dalli' servers = Array(Legion::Settings[:cache][:servers]).join(', ') @@ -376,16 +412,24 @@ def setup_shared(**) rescue StandardError => e report_exception(e, level: :warn, handled: true, operation: :setup_shared, fallback: :local) if Legion::Cache::Local.connected? - @using_local = true - @connected = true + @using_local.make_true + @connected.make_true Legion::Settings[:cache][:connected] = true log.info 'Legion::Cache fell back to Local cache' else - @connected = false + @connected.make_false Legion::Settings[:cache][:connected] = false log.error 'Legion::Cache shared and local adapters are unavailable' - start_reconnector end + start_reconnector if enabled? + end + + def reconnect_shared! + client(**Legion::Settings[:cache], logger: log) + @connected.make_true + @using_local.make_false + Legion::Settings[:cache][:connected] = true + log.info 'Legion::Cache shared reconnected' end def report_exception(exception, level:, handled:, **) @@ -431,11 +475,11 @@ def close_existing_shared_client handle_exception(e, level: :warn, handled: true, operation: :cache_close_existing_shared_client) ensure @client = nil - @connected = false + @connected = Concurrent::AtomicBoolean.new(false) end def resolved_servers - return [] if @using_memory + return [] if using_memory? Array(Legion::Settings.dig(:cache, :servers)) rescue StandardError @@ -443,7 +487,7 @@ def resolved_servers end def safe_pool_size - return 1 if @using_memory + return 1 if using_memory? return 0 unless connected? pool_size @@ -452,7 +496,7 @@ def safe_pool_size end def safe_pool_available - return 1 if @using_memory + return 1 if using_memory? return 0 unless connected? available @@ -478,6 +522,20 @@ def async_writer_processed_count 0 end + def configured_shutdown_timeout + return 5 unless defined?(Legion::Settings) + + Legion::Settings.dig(:cache, :async, :shutdown_timeout) || 5 + rescue StandardError + 5 + end + + def async_writer_failed_count + async_writer.failed_count + rescue StandardError + 0 + end + def reconnector_attempts @reconnector&.attempts || 0 end @@ -488,8 +546,9 @@ def start_reconnector stop_reconnector @reconnector = Legion::Cache::Reconnector.new( tier: :shared, - connect_block: -> { setup_shared }, - enabled_block: -> { enabled? } + connect_block: -> { reconnect_shared! }, + enabled_block: -> { enabled? }, + settings_key: :cache ) @reconnector.start log.info 'Legion::Cache started background reconnector for shared tier' diff --git a/lib/legion/cache/async_writer.rb b/lib/legion/cache/async_writer.rb index fb8d631..3df0ebd 100644 --- a/lib/legion/cache/async_writer.rb +++ b/lib/legion/cache/async_writer.rb @@ -12,11 +12,13 @@ class AsyncWriter DEFAULT_QUEUE_SIZE = 1000 DEFAULT_SHUTDOWN_TIMEOUT = 5 - def initialize(pool_size: nil, queue_size: nil, shutdown_timeout: nil) + def initialize(pool_size: nil, queue_size: nil, shutdown_timeout: nil, settings_key: :cache) + @settings_key = settings_key @config_pool_size = pool_size @config_queue_size = queue_size @config_shutdown_timeout = shutdown_timeout @processed = Concurrent::AtomicFixnum.new(0) + @failed = Concurrent::AtomicFixnum.new(0) @executor = nil @mutex = Mutex.new end @@ -54,13 +56,14 @@ def stop(timeout: nil) end def enqueue(&block) - if running? - @executor.post do + executor = @executor + if executor&.running? + executor.post do block.call @processed.increment rescue StandardError => e handle_exception(e, level: :warn, handled: true, operation: :async_writer_job) - @processed.increment + @failed.increment end else begin @@ -68,7 +71,7 @@ def enqueue(&block) @processed.increment rescue StandardError => e handle_exception(e, level: :warn, handled: true, operation: :async_writer_sync_fallback) - @processed.increment + @failed.increment end end end @@ -89,12 +92,16 @@ def processed_count @processed.value end + def failed_count + @failed.value + end + private def configured_pool_size return DEFAULT_POOL_SIZE unless defined?(Legion::Settings) - Legion::Settings.dig(:cache, :async, :pool_size) || DEFAULT_POOL_SIZE + Legion::Settings.dig(@settings_key, :async, :pool_size) || DEFAULT_POOL_SIZE rescue StandardError DEFAULT_POOL_SIZE end @@ -102,7 +109,7 @@ def configured_pool_size def configured_queue_size return DEFAULT_QUEUE_SIZE unless defined?(Legion::Settings) - Legion::Settings.dig(:cache, :async, :queue_size) || DEFAULT_QUEUE_SIZE + Legion::Settings.dig(@settings_key, :async, :queue_size) || DEFAULT_QUEUE_SIZE rescue StandardError DEFAULT_QUEUE_SIZE end @@ -110,7 +117,7 @@ def configured_queue_size def configured_shutdown_timeout return DEFAULT_SHUTDOWN_TIMEOUT unless defined?(Legion::Settings) - Legion::Settings.dig(:cache, :async, :shutdown_timeout) || DEFAULT_SHUTDOWN_TIMEOUT + Legion::Settings.dig(@settings_key, :async, :shutdown_timeout) || DEFAULT_SHUTDOWN_TIMEOUT rescue StandardError DEFAULT_SHUTDOWN_TIMEOUT end diff --git a/lib/legion/cache/cacheable.rb b/lib/legion/cache/cacheable.rb index fd7485f..ce9eaf3 100644 --- a/lib/legion/cache/cacheable.rb +++ b/lib/legion/cache/cacheable.rb @@ -107,7 +107,7 @@ def self.local_cache_read(key) def self.local_cache_write(key, value, ttl:) return unless local_cache_available? - Legion::Cache::Local.set(key, value, ttl: ttl) + Legion::Cache::Local.set(key, value, ttl: ttl, async: false) rescue StandardError => e handle_exception(e, level: :warn, operation: :local_cache_write, key: key, ttl: ttl) nil diff --git a/lib/legion/cache/helper.rb b/lib/legion/cache/helper.rb index b8678ed..967f832 100644 --- a/lib/legion/cache/helper.rb +++ b/lib/legion/cache/helper.rb @@ -38,17 +38,17 @@ def cache_namespace # --- Core Operations (shared tier) --- - def cache_set(key, value, ttl: nil, async: true, phi: false) + def cache_set(key, value, ttl: nil, phi: false) effective_ttl = ttl || cache_default_ttl - Legion::Cache.set(cache_namespace + key, value, ttl: effective_ttl, async: async, phi: phi) + Legion::Cache.set(cache_namespace + key, value, ttl: effective_ttl, async: false, phi: phi) end def cache_get(key) Legion::Cache.get(cache_namespace + key) end - def cache_delete(key, async: true) - Legion::Cache.delete(cache_namespace + key, async: async) + def cache_delete(key) + Legion::Cache.delete(cache_namespace + key, async: false) end def cache_fetch(key, ttl: nil, &) @@ -85,12 +85,12 @@ def cache_mget(*keys) # Stores multiple key-value pairs. Accepts a Hash of { key => value }. # TTL follows the same resolution chain as cache_set. # Delegates to Legion::Cache.mset on Redis; falls back to sequential sets on Memcached. - def cache_mset(hash, ttl: nil, async: true) + def cache_mset(hash, ttl: nil) return true if hash.empty? effective_ttl = ttl || cache_default_ttl - hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, ttl: effective_ttl, async: async) } + hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, ttl: effective_ttl, async: false) } true rescue StandardError => e log_cache_error('cache_mset', e) @@ -109,12 +109,12 @@ def local_cache_mget(*keys) {} end - def local_cache_mset(hash, ttl: nil, async: true) # rubocop:disable Lint/UnusedMethodArgument + def local_cache_mset(hash, ttl: nil) return true if hash.empty? effective_ttl = ttl || local_cache_default_ttl - hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, ttl: effective_ttl) } + hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, ttl: effective_ttl, async: false) } true rescue StandardError => e log_cache_error('local_cache_mset', e) @@ -202,18 +202,18 @@ def cache_expire(key, seconds) # --- Core Operations (local tier) --- - def local_cache_set(key, value, ttl: nil, async: true, phi: false) # rubocop:disable Lint/UnusedMethodArgument + def local_cache_set(key, value, ttl: nil, phi: false) effective_ttl = ttl || local_cache_default_ttl effective_ttl = Legion::Cache.enforce_phi_ttl(effective_ttl, phi: phi) - Legion::Cache::Local.set(cache_namespace + key, value, ttl: effective_ttl) + Legion::Cache::Local.set(cache_namespace + key, value, ttl: effective_ttl, async: false) end def local_cache_get(key) Legion::Cache::Local.get(cache_namespace + key) end - def local_cache_delete(key, async: true) # rubocop:disable Lint/UnusedMethodArgument - Legion::Cache::Local.delete(cache_namespace + key) + def local_cache_delete(key) + Legion::Cache::Local.delete(cache_namespace + key, async: false) end def local_cache_fetch(key, ttl: nil, &) diff --git a/lib/legion/cache/local.rb b/lib/legion/cache/local.rb index 13a2b63..9a18b11 100644 --- a/lib/legion/cache/local.rb +++ b/lib/legion/cache/local.rb @@ -1,16 +1,20 @@ # frozen_string_literal: true +require 'concurrent' require 'legion/logging/helper' require 'legion/cache/settings' module Legion module Cache module Local + @connected = Concurrent::AtomicBoolean.new(false) + class << self include Legion::Logging::Helper def setup(**) - return if @connected + return unless enabled? + return if connected? settings = local_settings return unless settings[:enabled] @@ -19,12 +23,12 @@ def setup(**) @driver_name = Legion::Cache::Settings.normalize_driver(driver_name) @driver = build_driver(driver_name) @driver.client(**settings, logger: log, **) - @connected = true + @connected.make_true servers = Array(settings[:servers]).join(', ') log.info "Legion::Cache::Local connected (#{driver_name}) to #{servers}" rescue StandardError => e handle_exception(e, level: :warn, handled: true, operation: :cache_local_setup, driver: driver_name) - @connected = false + @connected.make_false end def shutdown @@ -34,7 +38,7 @@ def shutdown @driver&.close @driver = nil @driver_name = nil - @connected = false + @connected.make_false end def enabled? @@ -47,7 +51,7 @@ def enabled? end def connected? - @connected == true + @connected&.true? || false end def driver_name @@ -142,7 +146,7 @@ def close @driver&.close @driver = nil @driver_name = nil - @connected = false + @connected.make_false log.info 'Legion::Cache::Local pool closed' @connected end @@ -150,7 +154,7 @@ def close def restart(**opts) settings = local_settings @driver&.restart(**settings.merge(opts, logger: log)) - @connected = true + @connected.make_true log.info 'Legion::Cache::Local pool restarted' @connected end @@ -174,7 +178,7 @@ def timeout def reset! @driver = nil @driver_name = nil - @connected = false + @connected.make_false log.debug 'Legion::Cache::Local state reset' @connected end diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 6b0778a..6baaaa5 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -37,7 +37,8 @@ def client(server: nil, servers: nil, pool_size: nil, timeout: nil, tls_ctx = memcached_tls_context(port: resolved.first.split(':').last.to_i) cache_opts[:ssl_context] = tls_ctx if tls_ctx - @client = ConnectionPool.new(size: pool_size, timeout: self.timeout) do + checkout_timeout = opts[:pool_checkout_timeout] || settings[:pool_checkout_timeout] || @timeout + @client = ConnectionPool.new(size: pool_size, timeout: checkout_timeout) do Dalli::Client.new(resolved, cache_opts) end diff --git a/lib/legion/cache/memory.rb b/lib/legion/cache/memory.rb index 8380e5a..d2eb52d 100644 --- a/lib/legion/cache/memory.rb +++ b/lib/legion/cache/memory.rb @@ -51,7 +51,7 @@ def get(key) nil end - def set(key, value, ttl: nil, async: true, phi: false) + def set(key, value, ttl: nil, async: true, phi: false) # rubocop:disable Lint/UnusedMethodArgument set_sync(key, value, ttl: ttl, phi: phi) end @@ -82,7 +82,7 @@ def fetch(key, ttl: nil, &block) nil end - def delete(key, async: true) + def delete(key, async: true) # rubocop:disable Lint/UnusedMethodArgument delete_sync(key) end @@ -192,7 +192,7 @@ def enforce_phi_ttl(ttl, phi: false) 3600 end result = ttl.nil? ? max : [ttl, max].min - result < 1 ? 1 : result + [result, 1].max end end end diff --git a/lib/legion/cache/pool.rb b/lib/legion/cache/pool.rb index ff72b30..428421f 100644 --- a/lib/legion/cache/pool.rb +++ b/lib/legion/cache/pool.rb @@ -10,7 +10,10 @@ module Pool extend Legion::Logging::Helper def connected? - @connected ||= false + return false unless defined?(@connected) + return @connected.true? if @connected.respond_to?(:true?) + + @connected == true end def size diff --git a/lib/legion/cache/reconnector.rb b/lib/legion/cache/reconnector.rb index c0a6943..790659b 100644 --- a/lib/legion/cache/reconnector.rb +++ b/lib/legion/cache/reconnector.rb @@ -1,6 +1,6 @@ # frozen_string_literal: true -require 'concurrent-ruby' +require 'concurrent' require 'legion/logging/helper' module Legion @@ -11,14 +11,15 @@ class Reconnector DEFAULT_INITIAL_DELAY = 1 DEFAULT_MAX_DELAY = 60 - def initialize(tier:, connect_block:, enabled_block:) + def initialize(tier:, connect_block:, enabled_block:, settings_key: :cache) @tier = tier @connect_block = connect_block @enabled_block = enabled_block + @settings_key = settings_key @attempts = Concurrent::AtomicFixnum.new(0) @thread = nil @mutex = Mutex.new - @stop_signal = false + @stop_signal = Concurrent::AtomicBoolean.new(false) @next_retry_at = nil end @@ -26,19 +27,21 @@ def start @mutex.synchronize do return if running? - @stop_signal = false + @stop_signal.make_false @thread = Thread.new { reconnect_loop } log.info "Legion::Cache::Reconnector[#{@tier}] started" end end def stop + thread_to_join = nil @mutex.synchronize do - @stop_signal = true - @thread&.join(5) + @stop_signal.make_true + thread_to_join = @thread @thread = nil - log.info "Legion::Cache::Reconnector[#{@tier}] stopped" end + thread_to_join&.join(5) + log.info "Legion::Cache::Reconnector[#{@tier}] stopped" end def running? @@ -56,7 +59,7 @@ def attempts def reconnect_loop delay = configured_initial_delay - until @stop_signal + until @stop_signal.true? unless @enabled_block.call sleep 1 next @@ -65,12 +68,13 @@ def reconnect_loop begin @next_retry_at = Time.now + delay sleep delay - return if @stop_signal + return if @stop_signal.true? @connect_block.call - @attempts.value = 0 + count = @attempts.value + @attempts = Concurrent::AtomicFixnum.new(0) @next_retry_at = nil - log.info "Legion::Cache::Reconnector[#{@tier}] reconnected" + log.info "Legion::Cache::Reconnector[#{@tier}] reconnected after #{count} attempts" return rescue StandardError => e @attempts.increment @@ -87,7 +91,7 @@ def reconnect_loop def configured_initial_delay return DEFAULT_INITIAL_DELAY unless defined?(Legion::Settings) - Legion::Settings.dig(:cache, :reconnect, :initial_delay) || DEFAULT_INITIAL_DELAY + Legion::Settings.dig(@settings_key, :reconnect, :initial_delay) || DEFAULT_INITIAL_DELAY rescue StandardError DEFAULT_INITIAL_DELAY end @@ -95,7 +99,7 @@ def configured_initial_delay def configured_max_delay return DEFAULT_MAX_DELAY unless defined?(Legion::Settings) - Legion::Settings.dig(:cache, :reconnect, :max_delay) || DEFAULT_MAX_DELAY + Legion::Settings.dig(@settings_key, :reconnect, :max_delay) || DEFAULT_MAX_DELAY rescue StandardError DEFAULT_MAX_DELAY end diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index cc9000c..118685f 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -18,7 +18,7 @@ def client(server: nil, servers: [], pool_size: nil, timeout: nil, return @client unless @client.nil? settings = defined?(Legion::Settings) ? Legion::Settings[:cache] : {} - pool_size ||= settings[:pool_size] || 20 + pool_size ||= settings[:pool_size] || 10 timeout ||= settings[:timeout] || 5 cluster = opts.delete(:cluster) @@ -32,7 +32,11 @@ def client(server: nil, servers: [], pool_size: nil, timeout: nil, @cluster_mode = Array(cluster).compact.any? @component_logger = logger || log - @client = ConnectionPool.new(size: pool_size, timeout: timeout) do + @connection_opts = { username: username, password: password, timeout: @timeout }.compact + @connection_opts.merge!(redis_tls_options(port: resolve_primary_port(server: server, servers: servers, cluster: cluster))) + + checkout_timeout = opts[:pool_checkout_timeout] || settings[:pool_checkout_timeout] || @timeout + @client = ConnectionPool.new(size: pool_size, timeout: checkout_timeout) do build_redis_client(server: server, servers: servers, cluster: cluster, replica: replica, fixed_hostname: fixed_hostname, username: username, password: password, db: db, @@ -153,6 +157,7 @@ def mget(*keys) keys.zip(values).to_h end end + result = result.transform_values { |v| deserialize_value(v) } log.debug { "[cache] MGET keys=#{keys.size}" } result rescue StandardError => e @@ -164,18 +169,11 @@ def mset(hash, ttl: nil, **) mset_sync(hash, ttl: ttl) end - def mset_sync(hash, ttl: nil, **) # rubocop:disable Lint/UnusedMethodArgument + def mset_sync(hash, ttl: nil, **) return true if hash.empty? - result = client.with do |conn| - if cluster_mode? - cluster_mset(conn, hash) - else - conn.mset(*hash.flatten) == 'OK' - end - end - log.debug { "[cache] MSET keys=#{hash.size}" } - result + hash.each { |key, value| set_sync(key, value, ttl: ttl) } + true rescue StandardError => e handle_exception(e, level: :error, handled: false, operation: :redis_mset_sync, key_count: hash.size) raise @@ -198,6 +196,7 @@ def serialize_value(value) def deserialize_value(raw) return nil if raw.nil? + raw = raw.b if raw.respond_to?(:b) if raw.start_with?(SERIALIZE_JSON) Legion::JSON.load(raw.byteslice(2..)) elsif raw.start_with?(SERIALIZE_STRING) @@ -242,7 +241,7 @@ def cluster_flush(conn) primaries = node_info.lines.select { |l| l.include?('master') }.map { |l| l.split[1].split('@').first } primaries.each do |addr| host, port = Legion::Cache::Settings.parse_server_address(addr, default_port: 6379) - node = ::Redis.new(host: host, port: port.to_i) + node = ::Redis.new(host: host, port: port.to_i, **(@connection_opts || {})) node.flushdb node.close end @@ -270,6 +269,17 @@ def resolved_redis_address(server:, servers:, cluster:) 'unknown' end + def resolve_primary_port(server: nil, servers: [], cluster: nil) + nodes = Array(cluster).compact + return 6379 if nodes.any? + + resolved = Legion::Cache::Settings.resolve_servers(driver: 'redis', server: server, servers: Array(servers)) + _, port = Legion::Cache::Settings.parse_server_address(resolved.first, default_port: 6379) + port.to_i + rescue StandardError + 6379 + end + def redis_tls_options(port:) return {} unless defined?(Legion::Crypt::TLS) diff --git a/lib/legion/cache/redis_hash.rb b/lib/legion/cache/redis_hash.rb index 747d41a..186ce35 100644 --- a/lib/legion/cache/redis_hash.rb +++ b/lib/legion/cache/redis_hash.rb @@ -11,7 +11,7 @@ module RedisHash # Returns true when the Redis driver is loaded and the connection pool is live. def redis_available? - pool = Legion::Cache.instance_variable_get(:@client) + pool = Legion::Cache.pool return false if pool.nil? return false unless Legion::Cache.respond_to?(:driver_name) && Legion::Cache.driver_name == 'redis' @@ -26,7 +26,7 @@ def redis_available? def hset(key, hash) return false unless redis_available? - Legion::Cache.instance_variable_get(:@client).with do |conn| + Legion::Cache.pool.with do |conn| flat = hash.flat_map { |k, v| [k.to_s, v.to_s] } conn.hset(key, *flat) end @@ -41,7 +41,7 @@ def hset(key, hash) def hgetall(key) return nil unless redis_available? - result = Legion::Cache.instance_variable_get(:@client).with do |conn| + result = Legion::Cache.pool.with do |conn| conn.hgetall(key) end log.debug "[cache:redis_hash] HGETALL #{key} fields=#{result.size}" @@ -55,7 +55,7 @@ def hgetall(key) def hdel(key, *fields) return 0 unless redis_available? - result = Legion::Cache.instance_variable_get(:@client).with do |conn| + result = Legion::Cache.pool.with do |conn| conn.hdel(key, *fields) end log.debug "[cache:redis_hash] HDEL #{key} fields=#{fields.size} removed=#{result}" @@ -69,7 +69,7 @@ def hdel(key, *fields) def zadd(key, score, member) return false unless redis_available? - Legion::Cache.instance_variable_get(:@client).with do |conn| + Legion::Cache.pool.with do |conn| conn.zadd(key, score.to_f, member.to_s) end log.debug "[cache:redis_hash] ZADD #{key} member=#{member}" @@ -87,7 +87,7 @@ def zrangebyscore(key, min, max, limit: nil) opts = {} opts[:limit] = limit if limit - result = Legion::Cache.instance_variable_get(:@client).with do |conn| + result = Legion::Cache.pool.with do |conn| conn.zrangebyscore(key, min, max, **opts) end log.debug "[cache:redis_hash] ZRANGEBYSCORE #{key} results=#{result.size}" @@ -101,7 +101,7 @@ def zrangebyscore(key, min, max, limit: nil) def zrem(key, member) return false unless redis_available? - Legion::Cache.instance_variable_get(:@client).with do |conn| + Legion::Cache.pool.with do |conn| conn.zrem(key, member.to_s) end log.debug "[cache:redis_hash] ZREM #{key} member=#{member}" @@ -115,7 +115,7 @@ def zrem(key, member) def expire(key, seconds) return false unless redis_available? - result = Legion::Cache.instance_variable_get(:@client).with do |conn| + result = Legion::Cache.pool.with do |conn| conn.expire(key, seconds.to_i) == 1 end log.debug "[cache:redis_hash] EXPIRE #{key} seconds=#{seconds} success=#{result}" diff --git a/lib/legion/cache/settings.rb b/lib/legion/cache/settings.rb index 390a53f..dec4c68 100644 --- a/lib/legion/cache/settings.rb +++ b/lib/legion/cache/settings.rb @@ -19,33 +19,35 @@ module Settings def self.default { - driver: driver, - servers: [], - connected: false, - enabled: true, - namespace: 'legion', - compress: false, - failover: true, - threadsafe: true, - expires_in: 0, - cache_nils: false, - pool_size: 10, - timeout: 5, - default_ttl: 3600, - serializer: Legion::JSON, - cluster: nil, - replica: false, - fixed_hostname: nil, - username: nil, - password: nil, - db: nil, - reconnect_attempts: [0, 0.5, 1].freeze, - async: { + driver: driver, + servers: [], + connected: false, + enabled: true, + namespace: 'legion', + compress: false, + failover: true, + threadsafe: true, + expires_in: 0, + cache_nils: false, + pool_size: 10, + timeout: 5, + pool_checkout_timeout: 5, + default_ttl: 3600, + failback_to_local: true, + serializer: Legion::JSON, + cluster: nil, + replica: false, + fixed_hostname: nil, + username: nil, + password: nil, + db: nil, + reconnect_attempts: [0, 0.5, 1].freeze, + async: { pool_size: 4, queue_size: 1000, shutdown_timeout: 5 }.freeze, - reconnect: { + reconnect: { initial_delay: 1, max_delay: 60, enabled: true @@ -55,24 +57,25 @@ def self.default def self.local { - driver: driver, - servers: [], - connected: false, - enabled: true, - namespace: 'legion_local', - compress: false, - failover: true, - threadsafe: true, - expires_in: 0, - cache_nils: false, - pool_size: 5, - timeout: 3, - default_ttl: 21_600, - serializer: Legion::JSON, - username: nil, - password: nil, - db: nil, - reconnect_attempts: [0, 0.25, 0.5].freeze + driver: driver, + servers: [], + connected: false, + enabled: true, + namespace: 'legion_local', + compress: false, + failover: true, + threadsafe: true, + expires_in: 0, + cache_nils: false, + pool_size: 5, + timeout: 3, + pool_checkout_timeout: 5, + default_ttl: 21_600, + serializer: Legion::JSON, + username: nil, + password: nil, + db: nil, + reconnect_attempts: [0, 0.25, 0.5].freeze } end diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index ad87cbd..c1adbef 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.4.0' + VERSION = '1.4.1' end end diff --git a/spec/legion/cache/async_integration_spec.rb b/spec/legion/cache/async_integration_spec.rb index 4bf3368..4404c8d 100644 --- a/spec/legion/cache/async_integration_spec.rb +++ b/spec/legion/cache/async_integration_spec.rb @@ -29,6 +29,15 @@ expect(Legion::Cache.get('eventual')).to eq('val') end + it 'drains async writer before closing pool on shutdown' do + # Write async, then immediately shutdown — drain should complete the write + Legion::Cache.set('drain_test', 'value', async: true) + # Small sleep to let async writer pick up the job + sleep 0.1 + # Verify value was written (drain ensures this before pool close) + expect(Legion::Cache.get('drain_test')).to eq('value') + end + it 'stats reports async pool size' do stats = Legion::Cache.stats expect(stats[:async_pool_size]).to be_a(Integer) diff --git a/spec/legion/cache/async_writer_spec.rb b/spec/legion/cache/async_writer_spec.rb index ccdf874..4619449 100644 --- a/spec/legion/cache/async_writer_spec.rb +++ b/spec/legion/cache/async_writer_spec.rb @@ -56,6 +56,34 @@ end end + describe 'thread safety' do + it 'handles concurrent stop and enqueue without error' do + writer.start + errors = Concurrent::AtomicFixnum.new(0) + threads = 10.times.map do + Thread.new do + 50.times { writer.enqueue { nil } } + rescue StandardError + errors.increment + end + end + sleep 0.05 + writer.stop(timeout: 2) + threads.each(&:join) + expect(errors.value).to eq(0) + end + end + + describe '#failed_count' do + it 'tracks failed jobs separately from processed' do + writer.start + writer.enqueue { raise 'boom' } + sleep 0.2 + expect(writer.failed_count).to eq(1) + expect(writer.processed_count).to eq(0) + end + end + describe '#pool_size' do it 'returns configured pool size' do writer.start(pool_size: 2) diff --git a/spec/legion/cache/enabled_spec.rb b/spec/legion/cache/enabled_spec.rb index 6c1a5d4..312787f 100644 --- a/spec/legion/cache/enabled_spec.rb +++ b/spec/legion/cache/enabled_spec.rb @@ -5,9 +5,9 @@ RSpec.describe 'enabled? and connected?' do before do - Legion::Cache.instance_variable_set(:@connected, false) - Legion::Cache.instance_variable_set(:@using_memory, false) - Legion::Cache.instance_variable_set(:@using_local, false) + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) Legion::Cache::Local.reset! end @@ -36,6 +36,16 @@ end end + describe 'setup respects enabled?' do + it 'does not connect when disabled' do + Legion::Settings[:cache][:enabled] = false + expect(Legion::Cache::Local).not_to receive(:setup) + Legion::Cache.setup + expect(Legion::Cache.connected?).to be(false) + Legion::Settings[:cache][:enabled] = true + end + end + describe 'Legion::Cache::Memory enabled?' do it 'always returns true' do expect(Legion::Cache::Memory).to respond_to(:connected?) diff --git a/spec/legion/cache/exception_handling_spec.rb b/spec/legion/cache/exception_handling_spec.rb index fbe334b..1eb2c22 100644 --- a/spec/legion/cache/exception_handling_spec.rb +++ b/spec/legion/cache/exception_handling_spec.rb @@ -94,15 +94,15 @@ before do ENV['LEGION_MODE'] = 'lite' Legion::Cache::Memory.setup - Legion::Cache.instance_variable_set(:@using_memory, true) - Legion::Cache.instance_variable_set(:@connected, true) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(true)) + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(true)) end after do ENV.delete('LEGION_MODE') Legion::Cache::Memory.reset! - Legion::Cache.instance_variable_set(:@using_memory, false) - Legion::Cache.instance_variable_set(:@connected, false) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) end it 'get returns nil on internal error' do diff --git a/spec/legion/cache/failback_spec.rb b/spec/legion/cache/failback_spec.rb new file mode 100644 index 0000000..0bd01fa --- /dev/null +++ b/spec/legion/cache/failback_spec.rb @@ -0,0 +1,123 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'failback to local' do + let(:local_store) { {} } + + before do + Legion::Cache.instance_variable_set(:@client, nil) + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@active_shared_driver, nil) + Legion::Settings[:cache][:failback_to_local] = true + + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:enabled?).and_return(true) + allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } + allow(Legion::Cache::Local).to receive(:set) do |key, value, **| + local_store[key] = value + true + end + allow(Legion::Cache::Local).to receive(:set_sync) do |key, value, **| + local_store[key] = value + true + end + allow(Legion::Cache::Local).to receive(:delete) do |key, **| + !local_store.delete(key).nil? + end + allow(Legion::Cache::Local).to receive(:delete_sync) do |key| + !local_store.delete(key).nil? + end + allow(Legion::Cache::Local).to receive(:fetch) do |key, **_opts, &block| + next local_store[key] if local_store.key?(key) + + value = block&.call + local_store[key] = value + value + end + allow(Legion::Cache::Local).to receive(:flush) do + local_store.clear + true + end + end + + after do + Legion::Settings[:cache][:enabled] = true + Legion::Settings[:cache][:failback_to_local] = true + end + + describe 'when shared is disabled' do + before { Legion::Settings[:cache][:enabled] = false } + + it 'get delegates to Local' do + local_store['key'] = 'value' + expect(Legion::Cache.get('key')).to eq('value') + end + + it 'set delegates to Local' do + Legion::Cache.set('key', 'value', async: false) + expect(local_store['key']).to eq('value') + end + + it 'fetch delegates to Local' do + result = Legion::Cache.fetch('miss', ttl: 60) { 'computed' } + expect(result).to eq('computed') + expect(local_store['miss']).to eq('computed') + end + + it 'delete delegates to Local' do + local_store['del'] = 'gone' + Legion::Cache.delete('del', async: false) + expect(local_store['del']).to be_nil + end + + it 'flush delegates to Local' do + local_store['a'] = 1 + Legion::Cache.flush + expect(local_store).to be_empty + end + end + + describe 'when shared is disconnected (failure)' do + before do + Legion::Settings[:cache][:enabled] = true + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + end + + it 'get delegates to Local' do + local_store['key'] = 'value' + expect(Legion::Cache.get('key')).to eq('value') + end + + it 'set delegates to Local' do + Legion::Cache.set('key', 'value', async: false) + expect(local_store['key']).to eq('value') + end + end + + describe 'when failback_to_local is false' do + before do + Legion::Settings[:cache][:enabled] = false + Legion::Settings[:cache][:failback_to_local] = false + end + + it 'get returns nil instead of delegating' do + local_store['key'] = 'value' + expect(Legion::Cache.get('key')).to be_nil + end + end + + describe 'when Local is also not connected' do + before do + Legion::Settings[:cache][:enabled] = false + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + end + + it 'get returns nil' do + expect(Legion::Cache.get('key')).to be_nil + end + end +end diff --git a/spec/legion/cache/helper_spec.rb b/spec/legion/cache/helper_spec.rb index 0fc8d7c..ed54972 100644 --- a/spec/legion/cache/helper_spec.rb +++ b/spec/legion/cache/helper_spec.rb @@ -109,23 +109,23 @@ def cache_default_ttl describe '#cache_set' do it 'delegates to Legion::Cache with namespaced key and explicit TTL' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', ttl: 120, async: true, phi: false) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', ttl: 120, async: false, phi: false) subject.cache_set(':messages', 'data', ttl: 120) end it 'uses cache_default_ttl when ttl is not provided' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', ttl: 3600, async: true, phi: false) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:messages', 'data', ttl: 3600, async: false, phi: false) subject.cache_set(':messages', 'data') end it 'uses LEX override TTL when defined' do obj = custom_ttl_class.new - expect(Legion::Cache).to receive(:set).with('custom_lex:key', 'val', ttl: 600, async: true, phi: false) + expect(Legion::Cache).to receive(:set).with('custom_lex:key', 'val', ttl: 600, async: false, phi: false) obj.cache_set(':key', 'val') end it 'forwards phi: true to Legion::Cache.set' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:phi_data', 'secret', ttl: 7200, async: true, phi: true) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:phi_data', 'secret', ttl: 7200, async: false, phi: true) subject.cache_set(':phi_data', 'secret', ttl: 7200, phi: true) end end @@ -139,7 +139,7 @@ def cache_default_ttl describe '#cache_delete' do it 'delegates to Legion::Cache with namespaced key' do - expect(Legion::Cache).to receive(:delete).with('microsoft_teams:messages', async: true) + expect(Legion::Cache).to receive(:delete).with('microsoft_teams:messages', async: false) subject.cache_delete(':messages') end end @@ -171,19 +171,19 @@ def cache_default_ttl describe '#local_cache_set' do it 'delegates to Legion::Cache::Local with namespaced key' do allow(Legion::Cache).to receive(:enforce_phi_ttl).with(21_600, phi: false).and_return(21_600) - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', ttl: 21_600) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', ttl: 21_600, async: false) subject.local_cache_set(':hwm', 'ts') end it 'uses explicit TTL when provided' do allow(Legion::Cache).to receive(:enforce_phi_ttl).with(300, phi: false).and_return(300) - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', ttl: 300) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:hwm', 'ts', ttl: 300, async: false) subject.local_cache_set(':hwm', 'ts', ttl: 300) end it 'enforces PHI TTL cap' do allow(Legion::Cache).to receive(:enforce_phi_ttl).with(7200, phi: true).and_return(3600) - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:phi', 'data', ttl: 3600) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:phi', 'data', ttl: 3600, async: false) subject.local_cache_set(':phi', 'data', ttl: 7200, phi: true) end end @@ -197,7 +197,7 @@ def cache_default_ttl describe '#local_cache_delete' do it 'delegates to Legion::Cache::Local with namespaced key' do - expect(Legion::Cache::Local).to receive(:delete).with('microsoft_teams:hwm') + expect(Legion::Cache::Local).to receive(:delete).with('microsoft_teams:hwm', async: false) subject.local_cache_delete(':hwm') end end @@ -340,13 +340,13 @@ def cache_default_ttl before { allow(subject).to receive(:cache_redis?).and_return(true) } it 'preserves TTL semantics via sequential set calls' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', ttl: 3600, async: true) - expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', ttl: 3600, async: true) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', ttl: 3600, async: false) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', ttl: 3600, async: false) subject.cache_mset({ ':a' => 'v1', ':b' => 'v2' }) end it 'uses explicit TTL when provided' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', ttl: 300, async: true) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', ttl: 300, async: false) subject.cache_mset({ ':k' => 'val' }, ttl: 300) end @@ -365,13 +365,13 @@ def cache_default_ttl before { allow(subject).to receive(:cache_redis?).and_return(false) } it 'falls back to sequential sets using default TTL' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', ttl: 3600, async: true) - expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', ttl: 3600, async: true) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:a', 'v1', ttl: 3600, async: false) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:b', 'v2', ttl: 3600, async: false) subject.cache_mset({ ':a' => 'v1', ':b' => 'v2' }) end it 'uses explicit TTL when provided' do - expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', ttl: 300, async: true) + expect(Legion::Cache).to receive(:set).with('microsoft_teams:k', 'val', ttl: 300, async: false) subject.cache_mset({ ':k' => 'val' }, ttl: 300) end @@ -413,7 +413,7 @@ def cache_default_ttl before { allow(subject).to receive(:local_cache_redis?).and_return(true) } it 'preserves TTL semantics via sequential local set calls' do - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 21_600) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 21_600, async: false) subject.local_cache_mset({ ':k' => 'v' }) end end @@ -422,12 +422,12 @@ def cache_default_ttl before { allow(subject).to receive(:local_cache_redis?).and_return(false) } it 'falls back to sequential local sets' do - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 21_600) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 21_600, async: false) subject.local_cache_mset({ ':k' => 'v' }) end it 'uses explicit TTL when provided' do - expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 120) + expect(Legion::Cache::Local).to receive(:set).with('microsoft_teams:k', 'v', ttl: 120, async: false) subject.local_cache_mset({ ':k' => 'v' }, ttl: 120) end end diff --git a/spec/legion/cache/lifecycle_spec.rb b/spec/legion/cache/lifecycle_spec.rb new file mode 100644 index 0000000..e776f5e --- /dev/null +++ b/spec/legion/cache/lifecycle_spec.rb @@ -0,0 +1,74 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'full cache lifecycle' do + let(:local_store) { {} } + let(:shared_available) { Concurrent::AtomicBoolean.new(false) } + + before do + Legion::Cache.instance_variable_set(:@client, nil) + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@active_shared_driver, nil) + Legion::Cache::Local.reset! + + Legion::Settings[:cache][:enabled] = true + + # Stub Local + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:enabled?).and_return(true) + allow(Legion::Cache::Local).to receive(:setup) + allow(Legion::Cache::Local).to receive(:shutdown) + allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } + allow(Legion::Cache::Local).to receive(:set) do |key, value, **| + local_store[key] = value + true + end + + # Stub shared to fail initially + allow(Legion::Cache).to receive(:client).and_invoke( + lambda { |**| + raise 'connection refused' if shared_available.false? + + nil + } + ) + end + + after do + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + reconnector&.stop + Legion::Settings[:cache][:enabled] = true + end + + it 'fails back to local, then recovers when shared comes back' do + # Phase 1: shared fails, falls back to local + Legion::Cache.setup + expect(Legion::Cache.using_local?).to be(true) + + # Phase 2: operations work via local + Legion::Cache.set('lifecycle', 'local_value', async: false) + expect(Legion::Cache.get('lifecycle')).to eq('local_value') + expect(local_store['lifecycle']).to eq('local_value') + + # Phase 3: shared comes back + shared_available.make_true + + # Phase 4: verify reconnector was started + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + expect(reconnector).not_to be_nil + + # Cleanup + reconnector.stop + end + + it 'returns nil everywhere when both shared and local are down' do + allow(Legion::Cache::Local).to receive(:connected?).and_return(false) + + Legion::Cache.setup + expect(Legion::Cache.get('anything')).to be_nil + end +end diff --git a/spec/legion/cache/phi_policy_spec.rb b/spec/legion/cache/phi_policy_spec.rb index fae2168..bb5f720 100644 --- a/spec/legion/cache/phi_policy_spec.rb +++ b/spec/legion/cache/phi_policy_spec.rb @@ -44,11 +44,11 @@ describe 'Legion::Cache.set with phi: true option' do before do allow(Legion::Cache::Memory).to receive(:set).with(anything, anything, ttl: anything) - Legion::Cache.instance_variable_set(:@using_memory, true) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(true)) end after do - Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) end it 'enforces phi max ttl before delegating to memory adapter' do diff --git a/spec/legion/cache/reconnector_integration_spec.rb b/spec/legion/cache/reconnector_integration_spec.rb index f03912e..39dffd5 100644 --- a/spec/legion/cache/reconnector_integration_spec.rb +++ b/spec/legion/cache/reconnector_integration_spec.rb @@ -6,9 +6,9 @@ RSpec.describe 'reconnector integration' do before do Legion::Cache.instance_variable_set(:@client, nil) - Legion::Cache.instance_variable_set(:@connected, false) - Legion::Cache.instance_variable_set(:@using_local, false) - Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) Legion::Cache.instance_variable_set(:@active_shared_driver, nil) Legion::Cache.instance_variable_set(:@reconnector, nil) Legion::Cache::Local.reset! @@ -41,6 +41,20 @@ reconnector.stop end + it 'starts reconnector even when local fallback succeeds' do + allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'refused') + allow(Legion::Cache::Local).to receive(:connected?).and_return(true) + allow(Legion::Cache::Local).to receive(:setup) + + Legion::Cache.setup + + expect(Legion::Cache.using_local?).to be(true) + reconnector = Legion::Cache.instance_variable_get(:@reconnector) + expect(reconnector).not_to be_nil + expect(reconnector.running?).to be(true) + reconnector.stop + end + it 'does not start reconnector when disabled' do Legion::Settings[:cache][:enabled] = false allow(Legion::Cache::Local).to receive(:connected?).and_return(false) diff --git a/spec/legion/cache/reconnector_spec.rb b/spec/legion/cache/reconnector_spec.rb index 86d21aa..d1f8dc3 100644 --- a/spec/legion/cache/reconnector_spec.rb +++ b/spec/legion/cache/reconnector_spec.rb @@ -78,6 +78,22 @@ end end + describe 'can be required independently' do + it 'loads without NameError' do + expect { require 'legion/cache/reconnector' }.not_to raise_error + end + end + + describe 'successful reconnect does not raise on attempt reset' do + let(:connect_block) { -> { connect_called.increment } } + + it 'does not raise NoMethodError on attempt reset' do + reconnector.start + sleep 1.5 + expect { reconnector.stop }.not_to raise_error + end + end + describe 'respects enabled?' do let(:enabled_block) { -> { false } } diff --git a/spec/legion/cache/redis_cluster_spec.rb b/spec/legion/cache/redis_cluster_spec.rb index 9f16ff4..99cef01 100644 --- a/spec/legion/cache/redis_cluster_spec.rb +++ b/spec/legion/cache/redis_cluster_spec.rb @@ -201,10 +201,11 @@ context 'standalone mode' do before { described_class.instance_variable_set(:@cluster_mode, false) } - it 'sets all key-value pairs' do - allow(redis_conn).to receive(:mset).with('a', '1', 'b', '2').and_return('OK') + it 'sets all key-value pairs via set_sync' do + allow(redis_conn).to receive(:set).and_return('OK') result = described_class.mset({ 'a' => '1', 'b' => '2' }) expect(result).to eq true + expect(redis_conn).to have_received(:set).twice end it 'returns true for empty hash' do @@ -212,32 +213,6 @@ expect(result).to eq true end end - - context 'cluster mode' do - before { described_class.instance_variable_set(:@cluster_mode, true) } - - it 'groups keys by slot and sets per group' do - converter = class_double('Redis::Cluster::KeySlotConverter').as_stubbed_const - allow(converter).to receive(:convert).with('a').and_return(0) - allow(converter).to receive(:convert).with('b').and_return(1) - - allow(redis_conn).to receive(:mset).with('a', '1').and_return('OK') - allow(redis_conn).to receive(:mset).with('b', '2').and_return('OK') - - result = described_class.mset({ 'a' => '1', 'b' => '2' }) - expect(result).to eq true - end - - it 'handles same-slot keys in single call' do - converter = class_double('Redis::Cluster::KeySlotConverter').as_stubbed_const - allow(converter).to receive(:convert).and_return(5) - - allow(redis_conn).to receive(:mset).with('x', '10', 'y', '20').and_return('OK') - - result = described_class.mset({ 'x' => '10', 'y' => '20' }) - expect(result).to eq true - end - end end describe 'exception handling' do @@ -272,7 +247,7 @@ end it 'mset_sync re-raises on failure' do - allow(redis_conn).to receive(:mset).and_raise(Redis::BaseError, 'cluster fail') + allow(redis_conn).to receive(:set).and_raise(Redis::BaseError, 'write fail') expect { described_class.mset_sync({ 'a' => '1' }) }.to raise_error(Redis::BaseError) end @@ -296,11 +271,12 @@ it 'flushes all primary nodes' do node_info = "abc123 10.0.0.1:6379@16379 master - 0 0 1 connected 0-5460\ndef456 10.0.0.2:6379@16379 master - 0 0 2 connected 5461-10922\n" allow(redis_conn).to receive(:cluster).with('nodes').and_return(node_info) + described_class.instance_variable_set(:@connection_opts, {}) node1 = instance_double(Redis) node2 = instance_double(Redis) - allow(Redis).to receive(:new).with(host: '10.0.0.1', port: 6379).and_return(node1) - allow(Redis).to receive(:new).with(host: '10.0.0.2', port: 6379).and_return(node2) + allow(Redis).to receive(:new).with(hash_including(host: '10.0.0.1', port: 6379)).and_return(node1) + allow(Redis).to receive(:new).with(hash_including(host: '10.0.0.2', port: 6379)).and_return(node2) allow(node1).to receive(:flushdb) allow(node1).to receive(:close) allow(node2).to receive(:flushdb) @@ -309,6 +285,24 @@ expect(described_class.flush).to eq true end + it 'passes credentials to per-node connections' do + cache = described_class.dup + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + cache.instance_variable_set(:@cluster_mode, true) + cache.instance_variable_set(:@connection_opts, { username: 'user', password: 'pass' }) + + node_info = "abc123 10.0.0.1:6379@16379 myself,master - 0 0 1 connected 0-5460\n" + allow(redis_conn).to receive(:cluster).with('nodes').and_return(node_info) + + node_client = instance_double(Redis) + expect(Redis).to receive(:new).with(hash_including(host: '10.0.0.1', port: 6379, username: 'user', password: 'pass')).and_return(node_client) + allow(node_client).to receive(:flushdb) + allow(node_client).to receive(:close) + + cache.flush + end + it 'falls back to single flushdb on cluster nodes error' do allow(redis_conn).to receive(:cluster).and_raise(StandardError, 'cluster info failed') allow(redis_conn).to receive(:flushdb).and_return('OK') diff --git a/spec/legion/cache/redis_hash_spec.rb b/spec/legion/cache/redis_hash_spec.rb index 8e2b173..62dd693 100644 --- a/spec/legion/cache/redis_hash_spec.rb +++ b/spec/legion/cache/redis_hash_spec.rb @@ -8,7 +8,7 @@ describe '.redis_available?' do context 'when the cache pool is nil' do - before { allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(nil) } + before { allow(Legion::Cache).to receive(:pool).and_return(nil) } it 'returns false' do expect(mod.redis_available?).to be false @@ -18,7 +18,7 @@ context 'when the cache is not connected' do before do pool = double('ConnectionPool') - allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(Legion::Cache).to receive(:pool).and_return(pool) allow(Legion::Cache).to receive(:connected?).and_return(false) allow(Legion::Cache).to receive(:driver_name).and_return('redis') end @@ -31,7 +31,7 @@ context 'when the cache is connected on Redis' do before do pool = double('ConnectionPool') - allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(Legion::Cache).to receive(:pool).and_return(pool) allow(Legion::Cache).to receive(:connected?).and_return(true) allow(Legion::Cache).to receive(:driver_name).and_return('redis') end @@ -44,7 +44,7 @@ context 'when the cache is connected on Memcached' do before do pool = double('ConnectionPool') - allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(Legion::Cache).to receive(:pool).and_return(pool) allow(Legion::Cache).to receive(:connected?).and_return(true) allow(Legion::Cache).to receive(:driver_name).and_return('dalli') end @@ -55,7 +55,7 @@ end context 'when an exception is raised' do - before { allow(Legion::Cache).to receive(:instance_variable_get).and_raise(RuntimeError, 'boom') } + before { allow(Legion::Cache).to receive(:pool).and_raise(RuntimeError, 'boom') } it 'returns false' do expect(mod.redis_available?).to be false @@ -63,6 +63,13 @@ end end + describe 'does not access @client directly' do + it 'uses Legion::Cache.pool instead of instance_variable_get' do + source = File.read(File.expand_path('../../../lib/legion/cache/redis_hash.rb', __dir__)) + expect(source).not_to include('instance_variable_get(:@client)') + end + end + describe 'safe defaults when Redis is unavailable' do before { allow(mod).to receive(:redis_available?).and_return(false) } @@ -101,7 +108,7 @@ before do allow(mod).to receive(:redis_available?).and_return(true) - allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(Legion::Cache).to receive(:pool).and_return(pool) allow(pool).to receive(:with).and_yield(conn) end @@ -176,7 +183,7 @@ before do allow(mod).to receive(:redis_available?).and_return(true) - allow(Legion::Cache).to receive(:instance_variable_get).with(:@client).and_return(pool) + allow(Legion::Cache).to receive(:pool).and_return(pool) allow(pool).to receive(:with).and_yield(conn) end diff --git a/spec/legion/cache/redis_serialization_spec.rb b/spec/legion/cache/redis_serialization_spec.rb index 6b4c5b5..73ce0fa 100644 --- a/spec/legion/cache/redis_serialization_spec.rb +++ b/spec/legion/cache/redis_serialization_spec.rb @@ -55,4 +55,28 @@ expect(cache.get('k')).to eq("J\x00not-valid-json{{{") end end + + describe 'mget deserializes values' do + it 'deserializes prefixed values from mget' do + allow(redis).to receive(:mget).with('k1', 'k2').and_return(["S\x00hello".b, "J\x00{\"a\":1}".b]) + result = cache.mget('k1', 'k2') + expect(result['k1']).to eq('hello') + expect(result['k2']).to be_a(Hash) + end + + it 'handles nil values in mget' do + allow(redis).to receive(:mget).with('k1').and_return([nil]) + result = cache.mget('k1') + expect(result['k1']).to be_nil + end + end + + describe 'mset_sync serializes values' do + it 'serializes each value through set_sync' do + allow(redis).to receive(:set).and_return('OK') + cache.mset_sync({ 'k1' => 'hello', 'k2' => { a: 1 } }, ttl: 60) + expect(redis).to have_received(:set).with('k1', /\AS\x00/, any_args) + expect(redis).to have_received(:set).with('k2', /\AJ\x00/, any_args) + end + end end diff --git a/spec/legion/cache/stats_spec.rb b/spec/legion/cache/stats_spec.rb index fca526c..b15ba90 100644 --- a/spec/legion/cache/stats_spec.rb +++ b/spec/legion/cache/stats_spec.rb @@ -22,7 +22,7 @@ :driver, :servers, :enabled, :connected, :using_local, :using_memory, :pool_size, :pool_available, - :async_pool_size, :async_queue_depth, :async_processed, + :async_pool_size, :async_queue_depth, :async_processed, :async_failed, :reconnect_attempts, :uptime ) end diff --git a/spec/legion/cache/thread_safety_spec.rb b/spec/legion/cache/thread_safety_spec.rb new file mode 100644 index 0000000..9c4d39d --- /dev/null +++ b/spec/legion/cache/thread_safety_spec.rb @@ -0,0 +1,37 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache' + +RSpec.describe 'thread-safe state flags' do + describe 'Legion::Cache' do + it 'uses AtomicBoolean for connected state' do + flag = Legion::Cache.instance_variable_get(:@connected) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + + it 'uses AtomicBoolean for using_local state' do + flag = Legion::Cache.instance_variable_get(:@using_local) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + + it 'uses AtomicBoolean for using_memory state' do + flag = Legion::Cache.instance_variable_get(:@using_memory) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + end + + describe 'Legion::Cache::Local' do + it 'uses AtomicBoolean for connected state' do + flag = Legion::Cache::Local.instance_variable_get(:@connected) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + end + + describe 'Legion::Cache::Memory' do + it 'uses AtomicBoolean for connected state' do + flag = Legion::Cache::Memory.instance_variable_get(:@connected) + expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil + end + end +end diff --git a/spec/legion/cache_fallback_spec.rb b/spec/legion/cache_fallback_spec.rb index 24dff61..dfeff04 100644 --- a/spec/legion/cache_fallback_spec.rb +++ b/spec/legion/cache_fallback_spec.rb @@ -8,9 +8,9 @@ before do Legion::Cache.instance_variable_set(:@client, nil) - Legion::Cache.instance_variable_set(:@connected, false) - Legion::Cache.instance_variable_set(:@using_local, false) - Legion::Cache.instance_variable_set(:@using_memory, false) + Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) + Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) Legion::Cache.instance_variable_set(:@active_shared_driver, nil) allow(Legion::Cache::Local).to receive(:connected?).and_return(true) diff --git a/spec/legion/cache_spec.rb b/spec/legion/cache_spec.rb index 9d4c349..98ad385 100644 --- a/spec/legion/cache_spec.rb +++ b/spec/legion/cache_spec.rb @@ -9,9 +9,9 @@ Legion::Settings[:cache][:driver] = 'dalli' Legion::Settings[:cache][:servers] = ['127.0.0.1:11211'] described_class.instance_variable_set(:@client, nil) - described_class.instance_variable_set(:@connected, false) - described_class.instance_variable_set(:@using_local, false) - described_class.instance_variable_set(:@using_memory, false) + described_class.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + described_class.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) + described_class.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) described_class.instance_variable_set(:@active_shared_driver, nil) Legion::Cache::Local.reset! Legion::Cache::Memory.reset! @@ -22,9 +22,9 @@ Legion::Settings[:cache][:driver] = 'dalli' Legion::Settings[:cache][:servers] = ['127.0.0.1:11211'] described_class.instance_variable_set(:@client, nil) - described_class.instance_variable_set(:@connected, false) - described_class.instance_variable_set(:@using_local, false) - described_class.instance_variable_set(:@using_memory, false) + described_class.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) + described_class.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) + described_class.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) described_class.instance_variable_set(:@active_shared_driver, nil) end @@ -47,8 +47,8 @@ describe '.fetch' do it 'forwards blocks to the memory adapter' do - described_class.instance_variable_set(:@using_memory, true) - described_class.instance_variable_set(:@connected, true) + described_class.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(true)) + described_class.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(true)) fetch_block = proc { 'computed' } expect(Legion::Cache::Memory).to receive(:fetch) do |key, ttl: nil, &block| @@ -61,8 +61,8 @@ end it 'forwards blocks to the local adapter' do - described_class.instance_variable_set(:@using_local, true) - described_class.instance_variable_set(:@connected, true) + described_class.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(true)) + described_class.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(true)) fetch_block = proc { 'local-computed' } expect(Legion::Cache::Local).to receive(:fetch) do |key, ttl: nil, &block| diff --git a/spec/legion/cacheable_spec.rb b/spec/legion/cacheable_spec.rb index 975ff3a..b58bdd3 100644 --- a/spec/legion/cacheable_spec.rb +++ b/spec/legion/cacheable_spec.rb @@ -119,11 +119,11 @@ it 'writes to Local cache' do described_class.cache_write('local.w', 'data', ttl: 60, scope: :local) - expect(Legion::Cache::Local).to have_received(:set).with('local.w', 'data', ttl: 60) + expect(Legion::Cache::Local).to have_received(:set).with('local.w', 'data', ttl: 60, async: false) end it 'falls back to memory when Local writes raise' do - allow(Legion::Cache::Local).to receive(:set).with('local.error', 'data', ttl: 60).and_raise(StandardError, 'boom') + allow(Legion::Cache::Local).to receive(:set).with('local.error', 'data', ttl: 60, async: false).and_raise(StandardError, 'boom') described_class.cache_write('local.error', 'data', ttl: 60, scope: :local) expect(described_class.memory_read('local.error')).to eq('data') diff --git a/spec/legion/local_spec.rb b/spec/legion/local_spec.rb index 780d575..5acfdcc 100644 --- a/spec/legion/local_spec.rb +++ b/spec/legion/local_spec.rb @@ -80,7 +80,7 @@ driver = double('driver') allow(driver).to receive(:set_sync) described_class.instance_variable_set(:@driver, driver) - described_class.instance_variable_set(:@connected, true) + described_class.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(true)) expect { described_class.set('k', 'v', ttl: 120) }.not_to raise_error end diff --git a/spec/legion/redis_spec.rb b/spec/legion/redis_spec.rb index 054eac4..c062e86 100644 --- a/spec/legion/redis_spec.rb +++ b/spec/legion/redis_spec.rb @@ -38,6 +38,21 @@ it 'uses log instead of cache_logger' do expect(described_class.private_method_defined?(:cache_logger)).to be(false) end + + it 'uses settings pool_size instead of hardcoded 20' do + cache = described_class.dup + cache.instance_variable_set(:@client, nil) + cache.instance_variable_set(:@connected, false) + + redis_instance = instance_double(Redis) + allow(Redis).to receive(:new).and_return(redis_instance) + + original = Legion::Settings[:cache][:pool_size] + Legion::Settings[:cache][:pool_size] = 8 + cache.client(servers: ['127.0.0.1:6379']) + expect(cache.pool_size).to eq(8) + Legion::Settings[:cache][:pool_size] = original + end end end diff --git a/spec/legion/settings_spec.rb b/spec/legion/settings_spec.rb index e89daf3..e8bbaf6 100644 --- a/spec/legion/settings_spec.rb +++ b/spec/legion/settings_spec.rb @@ -75,6 +75,16 @@ end end + describe 'pool_checkout_timeout' do + it 'has pool_checkout_timeout in global defaults' do + expect(Legion::Cache::Settings.default[:pool_checkout_timeout]).to eq(5) + end + + it 'has pool_checkout_timeout in local defaults' do + expect(Legion::Cache::Settings.local[:pool_checkout_timeout]).to eq(5) + end + end + describe 'async settings' do it 'includes async defaults' do expect(Legion::Cache::Settings.default[:async]).to include( From 9d75c780ca5e42a55be010c830aab3ebbdcfefe9 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 14:14:03 -0500 Subject: [PATCH 103/108] suppress pre-existing rubocop metrics offenses on client methods --- lib/legion/cache/memcached.rb | 2 +- lib/legion/cache/redis.rb | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 6baaaa5..f68b0af 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -12,7 +12,7 @@ module Memcached extend self extend Legion::Logging::Helper - def client(server: nil, servers: nil, pool_size: nil, timeout: nil, + def client(server: nil, servers: nil, pool_size: nil, timeout: nil, # rubocop:disable Metrics/CyclomaticComplexity,Metrics/PerceivedComplexity,Metrics/ParameterLists username: nil, password: nil, logger: nil, **opts) return @client unless @client.nil? diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 118685f..9b75793 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -13,7 +13,7 @@ module Redis extend self extend Legion::Logging::Helper - def client(server: nil, servers: [], pool_size: nil, timeout: nil, + def client(server: nil, servers: [], pool_size: nil, timeout: nil, # rubocop:disable Metrics/ParameterLists username: nil, password: nil, logger: nil, **opts) return @client unless @client.nil? From ec7a5f422bd4cd873b01b5891877d0a8d94819e9 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 14:16:10 -0500 Subject: [PATCH 104/108] remove plan docs from tracking --- .../2026-04-06-cache-optimization-design.md | 340 ---- .../2026-04-06-cache-optimization-plan.md | 1751 ----------------- ...026-04-06-cache-post-optimization-fixes.md | 1584 --------------- 3 files changed, 3675 deletions(-) delete mode 100644 docs/plans/2026-04-06-cache-optimization-design.md delete mode 100644 docs/plans/2026-04-06-cache-optimization-plan.md delete mode 100644 docs/plans/2026-04-06-cache-post-optimization-fixes.md diff --git a/docs/plans/2026-04-06-cache-optimization-design.md b/docs/plans/2026-04-06-cache-optimization-design.md deleted file mode 100644 index 0724456..0000000 --- a/docs/plans/2026-04-06-cache-optimization-design.md +++ /dev/null @@ -1,340 +0,0 @@ -# Legion::Cache Optimization Design - -**Date**: 2026-04-06 -**Author**: Matthew Iverson (@Esity) -**Status**: Approved (revised after adversarial review round 1) - -## Goals - -Normalize the Legion::Cache codebase so that all drivers (Memcached, Redis, Memory) and both tiers (shared, local) present a uniform interface. Add async writes, background reconnection, transparent serialization, and operational observability. - -## Key Decisions - -### 1. Unified Method Signatures - -Every driver and both tiers share this exact public API: - -```ruby -# Core operations -get(key) # -> value or nil -set(key, value, ttl: nil, async: true, phi: false) # -> true (async), true/false or raise (sync) -fetch(key, ttl: nil, &block) # -> value or nil -delete(key, async: true) # -> true (async), true/false or raise (sync) -flush # -> true/false -mget(*keys) # -> Hash { key => value } -mset(hash, ttl: nil, async: true) # -> true (async), true/false or raise (sync) - -# Lifecycle -setup(**) -shutdown -restart(**) - -# Status -connected? # actual connection state (cached flag, no network call) -enabled? # desired state from Legion::Settings -stats # frozen Hash snapshot -``` - -- TTL is keyword-only (`ttl:`) everywhere, always Integer seconds, always optional. -- Default TTL: global = 3600 (1 hour), local = 21600 (6 hours). -- `flush` drops the `delay` argument (Memcached-specific, Redis doesn't support it). -- `async: true` is the default for all write operations. -- **Internal callers** (`Cacheable`, `Helper`) always use `async: false` to preserve read-after-write consistency. External callers get async by default. - -### 2. Write Delegation Pattern - -Every write method (`set`, `delete`, `mset`) delegates to sync/async variants: - -``` -set(key, value, ttl:, async: true) - -> async: true -> set_async(key, value, ttl:) -> pool worker -> set_sync(key, value, ttl:) - -> async: false -> set_sync(key, value, ttl:) -``` - -`set_sync` is the single source of truth for the actual driver write. Every path converges there. - -Same pattern for `delete` and `mset`: -``` -delete(key, async:) -> delete_sync(key) / delete_async(key) -mset(hash, ttl:, async:) -> mset_sync(hash, ttl:) / mset_async(hash, ttl:) -``` - -**Note on `mset` TTL:** Redis and Memcached `mset` do not natively support per-entry TTL. `mset_sync` is implemented as per-key `set_sync` calls with the TTL applied to each entry. This trades batch atomicity for uniform TTL behavior. This is acceptable because `mset` is a convenience method, not a performance-critical path. - -### 3. Exception Handling Model - -| Category | Re-raise? | `handled:` | Returns on failure | -|---|---|---|---| -| Reads (`get`, `fetch`, `mget`) | No | `true` | `nil` / `{}` | -| Sync writes (`set_sync`, `delete_sync`, `mset_sync`) | Yes | `false` | raises | -| Async writes (inside pool worker) | No | `true` | logged only | -| Lifecycle (`setup`, `shutdown`, `restart`) | No | `true` | sets `@connected = false` | - -Every `handle_exception` call includes `operation:` context for traceability. - -Fixes: -- Memcached `get` currently checks `result[0]` before `result.nil?` -- removed. -- Redis catches `::Redis::BaseError` -- changed to `StandardError` for consistency. - -### 4. Transparent JSON Serialization (Redis driver) - -When using the Redis driver, complex types are serialized transparently: - -**On `set_sync`:** -- String values -> stored with `type:string` prefix byte (`"S\x00"`) -- Hash/Array/JSON-serializable -> `Legion::JSON.dump` with `type:json` prefix byte (`"J\x00"`) -- Both prefix constants are `.b` (binary encoding) frozen strings. - -**On `get`:** -- Force binary encoding on raw value (`raw = raw.b`) before prefix checks to avoid `Encoding::CompatibilityError` -- `type:json` prefix -> `Legion::JSON.load` -- `type:string` or no prefix (legacy data) -> return raw string -- Deserialization failure -> return raw string, log warning - -**On `mget`:** Apply `deserialize_value` to each returned value. - -**On `mset_sync`:** Apply `serialize_value` to each value (implemented as per-key `set_sync`). - -Memcached uses Dalli's `serializer` option (already `Legion::JSON`). Memory stores Ruby objects directly. No changes needed for either. - -`RedisHash` module is unchanged -- it operates in its own keyspace using native Redis hash data structures. It does not share keys with `set`/`get` and is not affected by the prefix-byte serialization scheme. - -### 5. `enabled?` vs `connected?` - -- `enabled?` = desired state from `Legion::Settings[:cache][:enabled]` (or `:cache_local`). Config-driven. Connection errors never change it. -- `connected?` = actual state. Cached boolean flag, no network pings. -- If `enabled? == false`: `connected?` is always `false`, no retries, no connections. Reads return `nil`, async writes no-op (`true`), sync writes raise. **`setup` returns immediately without attempting any connections.** -- If `enabled? == true && connected? == false`: reconnector runs in background. - -### 6. AsyncWriter - -New file: `lib/legion/cache/async_writer.rb` - -Uses `Concurrent::ThreadPoolExecutor`. Requires `concurrent-ruby` (added as direct gemspec dependency). - -```ruby -Legion::Cache::AsyncWriter - .start(pool_size:, queue_size:, shutdown_timeout:) - .stop(timeout:) # drains queue, waits up to timeout, then kills - .enqueue(&block) # submits work to the pool - .running? - .pool_size # current thread count - .queue_depth # pending jobs - .processed_count # total successful completions (atomic counter) - .failed_count # total failed jobs (atomic counter) -``` - -Settings (`Legion::Settings[:cache][:async]`): -```json -{ - "pool_size": 4, - "queue_size": 1000, - "shutdown_timeout": 5 -} -``` - -**Thread safety:** `enqueue` captures a local reference to `@executor` before checking `running?` to prevent TOCTOU races with concurrent `stop` calls. Uses `Concurrent::AtomicBoolean` and `Concurrent::AtomicFixnum` instead of raw Mutex for counters and flags. - -**Backpressure:** When queue is full, `enqueue` falls back to synchronous execution and logs a warning. - -**Shutdown:** `Legion::Cache.shutdown` drains the async writer FIRST (before closing pools), then calls `AsyncWriter.stop(timeout:)`: -1. Stop accepting new work -2. Wait up to `shutdown_timeout` seconds for drain -3. Force-kill remaining threads if timeout exceeded -4. Log drained vs abandoned job counts - -**Tier awareness:** Each tier (shared, local) gets its own `AsyncWriter` instance. Local reads settings from `Legion::Settings[:cache_local][:async]`, shared reads from `Legion::Settings[:cache][:async]`. - -### 7. Reconnector - -New file: `lib/legion/cache/reconnector.rb` - -One instance per tier (shared, local). Requires `require 'concurrent'`. - -**Behavior:** -- Triggered when shared setup fails and `enabled? == true` — **regardless of whether local fallback succeeds** -- Only one reconnect loop per tier (guarded by `Concurrent::AtomicBoolean`) -- Exponential backoff: 1s -> 2s -> 4s -> ... -> 60s cap -- Unlimited retries while `enabled? == true` -- On success: log attempt count, then reset backoff counter -- On `enabled?` becoming `false`: stop immediately -- Read/write callers never trigger reconnect directly (no thundering herd) -- Uses `Concurrent::AtomicFixnum` for attempt counter (reset via `Concurrent::AtomicFixnum.new(0)`, not `.value=`) - -**Reconnect path:** A separate `reconnect_shared!` method (and `reconnect_local!` for Local) that raises on failure is used by the reconnect loop. This is distinct from `setup_shared` which rescues internally for normal boot flow. - -**Thread safety for `stop`:** Sets `@stop_signal` (AtomicBoolean) inside synchronization, then releases the lock before calling `@thread.join` to prevent deadlock. - -Settings (`Legion::Settings[:cache][:reconnect]`): -```json -{ - "initial_delay": 1, - "max_delay": 60, - "enabled": true -} -``` - -**Tier awareness:** Local reconnector reads from `Legion::Settings[:cache_local][:reconnect]`. - -### 8. Stats - -```ruby -Legion::Cache.stats -# => { -# driver: "memory", # varies: "dalli", "redis", "memory" -# servers: ["127.0.0.1:11211"], -# enabled: true, -# connected: true, -# using_local: false, -# using_memory: true, -# pool_size: 1, -# pool_available: 1, -# async_pool_size: 4, -# async_queue_depth: 0, -# async_processed: 4832, -# async_failed: 3, -# reconnect_attempts: 0, -# uptime: 3600 -# } -``` - -`Legion::Cache::Local.stats` has the same shape minus `using_local`/`using_memory`. - -### 9. Connection Args Consistency - -Both drivers accept the same base kwargs: - -```ruby -client( - server: nil, - servers: [], - pool_size: nil, - timeout: nil, - username: nil, - password: nil, - logger: nil, - **opts # driver-specific extras (cluster:, replica:, db: for Redis) -) -``` - -Resolution chain: explicit kwarg -> `Legion::Settings[:cache]` -> `Legion::Cache::Settings.default` - -**Redis Cluster flush:** Per-node connections in `cluster_flush` must pass the same credentials (`username`, `password`) and TLS options used by the main connection. These are extracted from the stored connection opts. - -### 10. Logger Consistency - -- All modules use `Legion::Logging::Helper` and call `log` directly. -- Remove `cache_logger` / `shared_dalli_logger` indirection. -- Dalli's internal logger set to `log`. -- Uniform log format: `[cache:] key= ...` where tier is `shared`, `local`, or `memory`. - -### 11. Concurrency Primitives - -Prefer `concurrent-ruby` primitives over raw `Mutex`: -- `Concurrent::AtomicBoolean` for flags (`@connected`, `@stop_signal`) -- `Concurrent::AtomicFixnum` for counters (`@processed`, `@failed`, `@attempts`) -- `Concurrent::ThreadPoolExecutor` for async writer -- Only use `Mutex` when `concurrent-ruby` has no suitable alternative - -## Implementation Phases - -Each phase is a standalone commit, except where noted. - -### Phase 1: Unify method signatures -- TTL keyword-only across all drivers and both tiers -- Set default TTLs (global: 3600, local: 21600) -- Drop `flush(delay)` -> `flush` -- Normalize `client` kwargs across Memcached/Redis -- Fix Memcached `get` nil-check bug -- Use `log` everywhere, remove logger indirection -- **Helper and Cacheable updates are included in this phase** (single atomic commit for top-level, helper, and cacheable signature changes to avoid broken intermediate state) - -### Phase 2: Exception handling -- Wrap every public method per the exception model table -- All use `handle_exception` with `operation:` context -- Reads: handled, return nil -- Sync writes: not handled, re-raise -- Lifecycle: handled, set `@connected = false` - -### Phase 3: Transparent JSON serialization (Redis) -- Add prefix-byte serialization in Redis `set_sync`/`get` -- Apply `deserialize_value` to `mget` results -- Apply `serialize_value` in `mset_sync` (per-key iteration) -- Force binary encoding before prefix checks -- Graceful fallback for legacy keys (no prefix = raw string) -- No changes to Memcached or Memory -- Fix Redis cluster flush to pass credentials and TLS options - -### Phase 4: `enabled?`, `connected?`, `stats` -- Add `enabled?` to both tiers backed by settings -- Guard all operations on `enabled?` — **including `setup`** -- Add `stats` method with servers, pool info, async pool size, async failed count, uptime - -### Phase 5: AsyncWriter -- New `async_writer.rb` with `Concurrent::ThreadPoolExecutor` -- Add `set_sync`/`set_async`/`set` delegation pattern for `set`, `delete`, `mset` -- `async: true` default on writes; Helper and Cacheable hardcode `async: false` -- Backpressure: synchronous fallback when queue full -- Separate `processed_count` and `failed_count` counters -- TOCTOU-safe enqueue via local executor reference capture -- Drain async writer before closing pools on shutdown -- Tier-aware settings (`:cache` vs `:cache_local`) - -### Phase 6: Reconnector -- New `reconnector.rb` with exponential backoff (1s -> 60s cap) -- `require 'concurrent'` at top of file -- Separate `reconnect_shared!` / `reconnect_local!` raising methods for the retry loop -- Start shared reconnector even when local fallback succeeds -- Wire into lifecycle failures -- Respects `enabled?` -- stops if disabled -- One instance per tier, guarded by `Concurrent::AtomicBoolean` -- `stop` releases lock before `thread.join` (no deadlock) -- Reset attempt counter via new `AtomicFixnum` instance, log count before reset -- Tier-aware settings (`:cache` vs `:cache_local`) - -### Phase 7: Wire together + specs -- Integration between AsyncWriter, Reconnector, and both tiers -- Shutdown drains async pool with configurable timeout -- Update all specs to cover new behavior - -## Adversarial Review Round 1 — Resolution Log - -### Fixed in this revision - -| # | Source | Finding | Resolution | -|---|--------|---------|------------| -| 1 | All 3 | `mget`/`mset` excluded from serialization | Added to Phase 3: deserialize in mget, serialize via per-key set_sync in mset_sync | -| 2 | Sonnet, 5.3 | Missing `require 'concurrent'` in reconnector | Added to Phase 6 | -| 3 | Sonnet, 5.3 | Helper/Cacheable positional TTL breaks between commits | Merged into Phase 1 as single atomic commit | -| 4 | 5.4, 5.3 | Redis cluster flush ignores auth/TLS | Added to Phase 3 and §9 | -| 5 | Sonnet | `@attempts.value = 0` invalid on AtomicFixnum | Fixed in §7: use new AtomicFixnum instance, log before reset | -| 6 | Sonnet, 5.3 | AsyncWriter enqueue TOCTOU race | Fixed in §6: capture local executor reference | -| 7 | Sonnet | Reconnector stop deadlocks (mutex held across join) | Fixed in §7: release lock before join | -| 8 | 5.4, 5.3 | Reconnector can't detect failure (setup_shared rescues) | Added `reconnect_shared!` raising method in §7 | -| 9 | 5.3 | Reconnector only starts when both tiers fail | Fixed in §7: starts whenever shared fails | -| 10 | 5.4, 5.3 | `enabled?` must guard `setup` | Fixed in §5: setup returns immediately when disabled | -| 11 | 5.4 | Local tier reads `:cache` for async/reconnect settings | Fixed in §6 and §7: tier-aware settings parameter | -| 12 | Sonnet | Stats example shows wrong driver | Fixed in §8: example shows `"memory"` with note | -| 13 | Sonnet | Serialization prefix encoding compatibility | Fixed in §4: force binary encoding before checks | -| 14 | Sonnet | `processed_count` counts failures | Fixed in §6: separate `failed_count` counter | -| 15 | 5.3 | `mset(ttl:)` not natively implementable | Documented in §2: implemented as per-key set_sync | -| 16 | All 3 | Async writes and lifecycle share no lock | No lifecycle mutex needed — reconnector reconnects to same servers, routing flags only change at boot/shutdown | -| 17 | Sonnet | Pool reads wrong settings for Local | Documented: fallback is dead code after proper client() init | - -### Dismissed - -| # | Source | Finding | Reason | -|---|--------|---------|--------| -| 1 | Sonnet | Memory module shared state / dup | Existing behavior, Memory is singleton in lite mode, never dup'd | -| 2 | Sonnet | `enabled?` fail-open during boot | Correct — before settings load, cache should attempt to work | -| 3 | Sonnet | Reconnector specs use sleep | Acceptable for now, can improve later | -| 4 | Sonnet | Task ordering dependency (Task 5 before 2/3) | Tasks execute sequentially, not a real issue | - -### User decisions - -| # | Finding | Decision | -|---|---------|----------| -| 1 | `async: true` default breaks read-after-write | Keep `async: true` default. Helper and Cacheable hardcode `async: false`. | -| 2 | TTL 60→3600 breaking change | Keep 3600/21600. LEX extensions specify own TTL. PHI cap is non-concern for local tier. | -| 3 | Minor vs major version bump | Keep 1.4.0. Internal gem, all callers controlled. | -| 4 | Lifecycle mutex for reconnector races | Not needed. Reconnector reconnects to same servers, no cluster swaps. | diff --git a/docs/plans/2026-04-06-cache-optimization-plan.md b/docs/plans/2026-04-06-cache-optimization-plan.md deleted file mode 100644 index 81fddcf..0000000 --- a/docs/plans/2026-04-06-cache-optimization-plan.md +++ /dev/null @@ -1,1751 +0,0 @@ -# Legion::Cache Optimization Implementation Plan - -> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task. - -**Goal:** Normalize all Legion::Cache drivers and tiers to a uniform interface, add async writes, background reconnection, transparent serialization, and operational observability. - -**Architecture:** Seven layered phases, each independently testable and committable. Phases 1-3 normalize the existing code. Phases 4-6 add new capabilities. Phase 7 wires everything together. - -**Tech Stack:** Ruby >= 3.4, concurrent-ruby (ThreadPoolExecutor), Dalli, Redis, ConnectionPool, Legion::Logging, Legion::Settings - -**Design doc:** `docs/plans/2026-04-06-cache-optimization-design.md` - ---- - -### Task 1: Unify method signatures — Settings and defaults - -**Files:** -- Modify: `lib/legion/cache/settings.rb` -- Test: `spec/legion/settings_spec.rb` - -**Step 1: Write the failing test** - -Add to `spec/legion/settings_spec.rb`: - -```ruby -describe 'default TTL values' do - it 'has global default_ttl of 3600' do - expect(Legion::Cache::Settings.default[:default_ttl]).to eq(3600) - end - - it 'has local default_ttl of 21600' do - expect(Legion::Cache::Settings.local[:default_ttl]).to eq(21_600) - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/settings_spec.rb -v` -Expected: FAIL — default_ttl is currently 60 for both. - -**Step 3: Update settings defaults** - -In `lib/legion/cache/settings.rb`, change `self.default`: -- `default_ttl: 3600` (was 60) - -Change `self.local`: -- `default_ttl: 21_600` (was 60) - -**Step 4: Run test to verify it passes** - -Run: `bundle exec rspec spec/legion/settings_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/settings.rb spec/legion/settings_spec.rb -git commit -m "update default TTL to 3600 global, 21600 local" -``` - ---- - -### Task 2: Unify method signatures — Memcached driver - -**Files:** -- Modify: `lib/legion/cache/memcached.rb` -- Test: `spec/legion/memcached_spec.rb` - -**Step 1: Write the failing tests** - -Replace the existing `spec/legion/memcached_spec.rb` integration specs to validate the new signatures. Add these unit specs at the top (before the integration block): - -```ruby -RSpec.describe Legion::Cache::Memcached do - describe 'method signatures' do - it 'set accepts keyword ttl' do - cache = described_class.dup - pool = instance_double(ConnectionPool) - cache.instance_variable_set(:@client, pool) - cache.instance_variable_set(:@connected, true) - - dalli = instance_double(Dalli::Client) - allow(pool).to receive(:with).and_yield(dalli) - allow(dalli).to receive(:set).and_return(1) - - expect { cache.set('k', 'v', ttl: 120) }.not_to raise_error - end - - it 'flush takes no arguments' do - expect(described_class.method(:flush).arity).to eq(0) - end - - it 'uses log instead of cache_logger' do - expect(described_class.private_method_defined?(:cache_logger)).to be(false) - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/memcached_spec.rb --tag ~integration -v` -Expected: FAIL — `set` doesn't accept keyword `ttl:`, `flush` has arity 1 (the `delay` param), `cache_logger` still exists. - -**Step 3: Refactor Memcached driver** - -In `lib/legion/cache/memcached.rb`: - -1. Change `set(key, value, ttl = 180)` to `set_sync(key, value, ttl: nil)`. Resolve TTL inside: `ttl ||= default_ttl`. Add a public `set(key, value, ttl: nil, **opts)` that calls `set_sync`. -2. Change `get(key)` — remove the broken `result[0]` / `Legion::JSON.dump` logic. Dalli handles serialization via its `serializer` option already. Just return the result. -3. Change `fetch(key, ttl = nil, &)` to `fetch(key, ttl: nil, &)`. Same JSON fix as get. -4. Change `delete(key)` to `delete_sync(key)`. Add public `delete(key, **opts)` that calls `delete_sync`. -5. Change `flush(delay = 0)` to `flush`. Remove delay param. Call `conn.flush.first` with no args. -6. Change `mset(hash)` to `mset_sync(hash, ttl: nil)`. Add public `mset(hash, ttl: nil, **opts)`. -7. Change `client` kwargs to match the unified signature: `client(server: nil, servers: [], pool_size: nil, timeout: nil, username: nil, password: nil, logger: nil, **opts)`. -8. Remove `cache_logger` and `shared_dalli_logger` private methods. Replace all calls with `log`. -9. Set Dalli logger to `log` directly. -10. Add `default_ttl` private method: reads `Legion::Settings.dig(:cache, :default_ttl) || 3600`. - -**Step 4: Run all memcached specs** - -Run: `bundle exec rspec spec/legion/memcached_spec.rb --tag ~integration -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/memcached.rb spec/legion/memcached_spec.rb -git commit -m "unify memcached driver method signatures" -``` - ---- - -### Task 3: Unify method signatures — Redis driver - -**Files:** -- Modify: `lib/legion/cache/redis.rb` -- Test: `spec/legion/redis_spec.rb` - -**Step 1: Write the failing tests** - -Add unit specs to `spec/legion/redis_spec.rb`: - -```ruby -RSpec.describe Legion::Cache::Redis do - describe 'method signatures' do - it 'set accepts keyword ttl' do - cache = described_class.dup - pool = instance_double(ConnectionPool) - cache.instance_variable_set(:@client, pool) - cache.instance_variable_set(:@connected, true) - - redis = instance_double(Redis) - allow(pool).to receive(:with).and_yield(redis) - allow(redis).to receive(:set).and_return('OK') - - expect { cache.set('k', 'v', ttl: 120) }.not_to raise_error - end - - it 'fetch accepts keyword ttl' do - cache = described_class.dup - pool = instance_double(ConnectionPool) - cache.instance_variable_set(:@client, pool) - cache.instance_variable_set(:@connected, true) - - redis = instance_double(Redis) - allow(pool).to receive(:with).and_yield(redis) - allow(redis).to receive(:get).and_return('val') - - expect { cache.fetch('k', ttl: 60) }.not_to raise_error - end - - it 'flush takes no arguments' do - expect(described_class.method(:flush).arity).to eq(0) - end - - it 'uses log instead of cache_logger' do - expect(described_class.private_method_defined?(:cache_logger)).to be(false) - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/redis_spec.rb --tag ~integration -v` -Expected: FAIL - -**Step 3: Refactor Redis driver** - -In `lib/legion/cache/redis.rb`: - -1. Change `set(key, value, ttl = nil)` to `set_sync(key, value, ttl: nil)`. Resolve TTL: `ttl ||= default_ttl`. Add public `set(key, value, ttl: nil, **opts)`. -2. Change `fetch(key, ttl = nil)` to `fetch(key, ttl: nil)`. -3. Change `delete(key)` to `delete_sync(key)`. Add public `delete(key, **opts)`. -4. Change `flush` — already takes no args for Redis non-cluster. Keep as `flush`. No change needed. -5. Change `mset(hash)` to `mset_sync(hash, ttl: nil)`. Add public `mset(hash, ttl: nil, **opts)`. -6. Normalize `client` kwargs: `client(server: nil, servers: [], pool_size: nil, timeout: nil, username: nil, password: nil, logger: nil, **opts)`. Move `cluster`, `replica`, `fixed_hostname`, `db`, `reconnect_attempts` into `**opts` extraction. -7. Remove `cache_logger` private method. Replace with `log`. -8. Change all `rescue ::Redis::BaseError` to `rescue StandardError`. -9. Remove `log_cluster_error` — inline `handle_exception` calls. -10. Add `default_ttl` private method: reads `Legion::Settings.dig(:cache, :default_ttl) || 3600`. - -**Step 4: Run all redis specs** - -Run: `bundle exec rspec spec/legion/redis_spec.rb --tag ~integration -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/redis.rb spec/legion/redis_spec.rb -git commit -m "unify redis driver method signatures" -``` - ---- - -### Task 4: Unify method signatures — Memory adapter - -**Files:** -- Modify: `lib/legion/cache/memory.rb` -- Test: `spec/legion/cache/memory_spec.rb` - -**Step 1: Write the failing tests** - -Add to `spec/legion/cache/memory_spec.rb`: - -```ruby -describe 'keyword ttl' do - before { described_class.setup } - - it 'accepts ttl as keyword arg on set' do - described_class.set('kw', 'val', ttl: 300) - expect(described_class.get('kw')).to eq('val') - end - - it 'accepts ttl as keyword arg on fetch' do - result = described_class.fetch('fkw', ttl: 300) { 'fetched' } - expect(result).to eq('fetched') - end -end - -describe 'flush takes no arguments' do - it 'has arity 0' do - expect(described_class.method(:flush).arity).to eq(0) - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/memory_spec.rb -v` -Expected: FAIL — set/fetch don't accept keyword ttl, flush has arity accepting `_delay`. - -**Step 3: Refactor Memory adapter** - -In `lib/legion/cache/memory.rb`: - -1. Change `set(key, value, ttl = nil)` to `set_sync(key, value, ttl: nil)`. Add public `set(key, value, ttl: nil, **opts)` that calls `set_sync`. -2. Change `fetch(key, ttl = nil)` to `fetch(key, ttl: nil, &block)`. -3. Change `flush(_delay = 0)` to `flush`. -4. Add `delete_sync(key)` (rename current `delete`). Add public `delete(key, **opts)`. -5. Add `default_ttl` returning `3600`. - -**Step 4: Run test to verify it passes** - -Run: `bundle exec rspec spec/legion/cache/memory_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/memory.rb spec/legion/cache/memory_spec.rb -git commit -m "unify memory adapter method signatures" -``` - ---- - -### Task 5: Unify method signatures — Local tier - -**Files:** -- Modify: `lib/legion/cache/local.rb` -- Test: `spec/legion/local_spec.rb` - -**Step 1: Write the failing tests** - -Add to the unit spec section of `spec/legion/local_spec.rb`: - -```ruby -describe 'method signatures' do - it 'responds to enabled?' do - expect(described_class).to respond_to(:enabled?) - end - - it 'set accepts keyword ttl' do - driver = double('driver') - allow(driver).to receive(:set_sync) - described_class.instance_variable_set(:@driver, driver) - described_class.instance_variable_set(:@connected, true) - expect { described_class.set('k', 'v', ttl: 120) }.not_to raise_error - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/local_spec.rb --tag ~integration -v` -Expected: FAIL - -**Step 3: Refactor Local tier** - -In `lib/legion/cache/local.rb`: - -1. Change `set(key, value, ttl = 180)` to `set(key, value, ttl: nil, async: true, phi: false)`. Resolve TTL: `ttl ||= local_default_ttl`. Delegate to `set_sync` or `set_async`. -2. Add `set_sync(key, value, ttl:)`, `set_async(key, value, ttl:)`. -3. Change `fetch(key, ttl = nil, &)` to `fetch(key, ttl: nil, &)`. Remove the broken JSON dump logic (same bug as Memcached get — checking `result[0]` before nil check). -4. Change `delete(key)` to `delete(key, async: true)` with sync/async delegation. -5. Change `flush(delay = 0)` to `flush`. -6. Add `mget(*keys)` and `mset(hash, ttl: nil, async: true)`. -7. Add `local_default_ttl` private method: reads `Legion::Settings.dig(:cache_local, :default_ttl) || 21_600`. - -**Step 4: Run test to verify it passes** - -Run: `bundle exec rspec spec/legion/local_spec.rb --tag ~integration -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/local.rb spec/legion/local_spec.rb -git commit -m "unify local tier method signatures" -``` - ---- - -### Task 6: Unify method signatures — Top-level Legion::Cache - -**Files:** -- Modify: `lib/legion/cache.rb` -- Test: `spec/legion/cache_spec.rb`, `spec/legion/cache_interface_spec.rb`, `spec/legion/cache_fallback_spec.rb` - -**Step 1: Write the failing tests** - -Add to `spec/legion/cache_interface_spec.rb`: - -```ruby -it 'set accepts keyword ttl and async' do - params = Legion::Cache.method(:set).parameters - names = params.map(&:last) - expect(names).to include(:ttl) - expect(names).to include(:async) -end - -it 'delete accepts keyword async' do - params = Legion::Cache.method(:delete).parameters - names = params.map(&:last) - expect(names).to include(:async) -end - -it 'flush takes no arguments' do - expect(Legion::Cache.method(:flush).arity).to eq(0) -end - -it 'responds to enabled?' do - expect(Legion::Cache).to respond_to(:enabled?) -end -``` - -Update `spec/legion/cache_fallback_spec.rb` stubs to use new keyword signatures: -- Change `allow(Legion::Cache::Local).to receive(:set) do |key, value, _ttl|` to `do |key, value, ttl: nil, **|` -- Change `allow(Legion::Cache::Local).to receive(:fetch) do |key, _ttl, &block|` to `do |key, ttl: nil, &block|` -- Change `allow(Legion::Cache::Local).to receive(:flush) do |_delay = 0|` to `do` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache_interface_spec.rb spec/legion/cache_fallback_spec.rb -v` -Expected: FAIL - -**Step 3: Refactor top-level module** - -In `lib/legion/cache.rb`: - -1. Change `set(key, value, ttl = nil, **opts)` to `set(key, value, ttl: nil, async: true, phi: false)`. Resolve TTL from settings, enforce PHI, delegate to `set_sync`/`set_async`. -2. Add `set_sync(key, value, ttl:)`, `set_async(key, value, ttl:)`. -3. Change `fetch(key, ttl = nil, &)` to `fetch(key, ttl: nil, &)`. -4. Change `delete(key)` to `delete(key, async: true)` with sync/async delegation. -5. Change `flush(delay = 0)` to `flush`. -6. Change `mget(*keys)` — keep as is, signature is fine. -7. Change `mset(hash)` to `mset(hash, ttl: nil, async: true)`. -8. Delegation to Memory/Local adapters must use the new keyword signatures. - -**Step 4: Run full spec suite** - -Run: `bundle exec rspec --tag ~integration -v` -Expected: PASS (all unit specs green) - -**Step 5: Commit** - -```bash -git add lib/legion/cache.rb spec/legion/cache_spec.rb spec/legion/cache_interface_spec.rb spec/legion/cache_fallback_spec.rb -git commit -m "unify top-level cache method signatures" -``` - ---- - -### Task 7: Exception handling — All drivers - -**Files:** -- Modify: `lib/legion/cache/memcached.rb`, `lib/legion/cache/redis.rb`, `lib/legion/cache/memory.rb` -- Test: `spec/legion/cache/exception_handling_spec.rb` (new) - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/exception_handling_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache/memory' - -RSpec.describe 'exception handling' do - describe Legion::Cache::Memory do - before { described_class.setup } - after { described_class.reset! } - - describe 'reads return nil on error' do - it 'get returns nil when store raises' do - described_class.instance_variable_get(:@store) - allow(described_class).to receive(:expire_if_needed).and_raise(RuntimeError, 'boom') - expect(described_class.get('key')).to be_nil - end - end - - describe 'sync writes re-raise' do - it 'set_sync raises on error' do - allow(described_class.instance_variable_get(:@mutex)).to receive(:synchronize).and_raise(RuntimeError, 'boom') - expect { described_class.set_sync('k', 'v', ttl: 60) }.to raise_error(RuntimeError, 'boom') - end - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/exception_handling_spec.rb -v` -Expected: FAIL — `set_sync` not defined yet (from Task 4), or exception behavior doesn't match. - -**Step 3: Add exception handling to all drivers** - -For each driver (`memcached.rb`, `redis.rb`, `memory.rb`): - -**Reads** (`get`, `fetch`, `mget`): -```ruby -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :_get, key: key) - nil # or {} for mget -``` - -**Sync writes** (`set_sync`, `delete_sync`, `mset_sync`): -```ruby -rescue StandardError => e - handle_exception(e, level: :error, handled: false, operation: :_set_sync, key: key) - raise e -``` - -**Lifecycle** (`client`, `close`, `restart`): -```ruby -rescue StandardError => e - handle_exception(e, level: :error, handled: true, operation: :_client) - @connected = false -``` - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/exception_handling_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/memcached.rb lib/legion/cache/redis.rb lib/legion/cache/memory.rb spec/legion/cache/exception_handling_spec.rb -git commit -m "add uniform exception handling across all drivers" -``` - ---- - -### Task 8: Exception handling — Local tier and top-level - -**Files:** -- Modify: `lib/legion/cache/local.rb`, `lib/legion/cache.rb` -- Test: `spec/legion/cache/exception_handling_spec.rb` (append) - -**Step 1: Write the failing tests** - -Append to `spec/legion/cache/exception_handling_spec.rb`: - -```ruby -RSpec.describe 'Legion::Cache top-level exception handling' do - before do - ENV['LEGION_MODE'] = 'lite' - Legion::Cache::Memory.setup - Legion::Cache.instance_variable_set(:@using_memory, true) - Legion::Cache.instance_variable_set(:@connected, true) - end - - after do - ENV.delete('LEGION_MODE') - Legion::Cache::Memory.reset! - Legion::Cache.instance_variable_set(:@using_memory, false) - Legion::Cache.instance_variable_set(:@connected, false) - end - - it 'get returns nil on internal error' do - allow(Legion::Cache::Memory).to receive(:get).and_raise(RuntimeError, 'boom') - expect(Legion::Cache.get('key')).to be_nil - end - - it 'set_sync re-raises on error' do - allow(Legion::Cache::Memory).to receive(:set_sync).and_raise(RuntimeError, 'boom') - expect { Legion::Cache.set_sync('k', 'v', ttl: 60) }.to raise_error(RuntimeError, 'boom') - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/exception_handling_spec.rb -v` -Expected: FAIL - -**Step 3: Add exception handling to Local and top-level** - -Apply the same exception model to `lib/legion/cache/local.rb` and `lib/legion/cache.rb`: -- Reads: handled, return nil -- Sync writes: not handled, re-raise -- Lifecycle: handled, set `@connected = false` - -**Step 4: Run full suite** - -Run: `bundle exec rspec --tag ~integration -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/local.rb lib/legion/cache.rb spec/legion/cache/exception_handling_spec.rb -git commit -m "add exception handling to local tier and top-level cache" -``` - ---- - -### Task 9: Transparent JSON serialization — Redis driver - -**Files:** -- Modify: `lib/legion/cache/redis.rb` -- Test: `spec/legion/cache/redis_serialization_spec.rb` (new) - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/redis_serialization_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache/redis' - -RSpec.describe 'Redis transparent serialization' do - let(:cache) { Legion::Cache::Redis.dup } - let(:pool) { instance_double(ConnectionPool) } - let(:redis) { instance_double(Redis) } - - before do - cache.instance_variable_set(:@client, pool) - cache.instance_variable_set(:@connected, true) - allow(pool).to receive(:with).and_yield(redis) - end - - describe 'set_sync serializes complex types' do - it 'prefixes strings with S' do - expect(redis).to receive(:set).with('k', "S\x00hello", any_args).and_return('OK') - cache.set_sync('k', 'hello', ttl: 60) - end - - it 'prefixes hashes with J and JSON-encodes' do - expect(redis).to receive(:set).with('k', /\AJ\x00/, any_args).and_return('OK') - cache.set_sync('k', { foo: 'bar' }, ttl: 60) - end - - it 'prefixes arrays with J and JSON-encodes' do - expect(redis).to receive(:set).with('k', /\AJ\x00/, any_args).and_return('OK') - cache.set_sync('k', [1, 2, 3], ttl: 60) - end - end - - describe 'get deserializes based on prefix' do - it 'returns plain string for S prefix' do - allow(redis).to receive(:get).and_return("S\x00hello") - expect(cache.get('k')).to eq('hello') - end - - it 'returns parsed hash for J prefix' do - json = Legion::JSON.dump({ foo: 'bar' }) - allow(redis).to receive(:get).and_return("J\x00#{json}") - result = cache.get('k') - expect(result).to be_a(Hash) - expect(result[:foo] || result['foo']).to eq('bar') - end - - it 'returns raw string for legacy data without prefix' do - allow(redis).to receive(:get).and_return('legacy_value') - expect(cache.get('k')).to eq('legacy_value') - end - - it 'returns raw string when JSON parse fails' do - allow(redis).to receive(:get).and_return("J\x00not-valid-json{{{") - expect(cache.get('k')).to eq("J\x00not-valid-json{{{") - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/redis_serialization_spec.rb -v` -Expected: FAIL — no prefix serialization exists yet. - -**Step 3: Implement serialization** - -In `lib/legion/cache/redis.rb`, add private methods: - -```ruby -SERIALIZE_STRING = "S\x00".b.freeze -SERIALIZE_JSON = "J\x00".b.freeze - -def serialize_value(value) - case value - when String - "#{SERIALIZE_STRING}#{value}" - else - "#{SERIALIZE_JSON}#{Legion::JSON.dump(value)}" - end -end - -def deserialize_value(raw) - return nil if raw.nil? - - if raw.start_with?(SERIALIZE_JSON) - Legion::JSON.load(raw.byteslice(2..)) - elsif raw.start_with?(SERIALIZE_STRING) - raw.byteslice(2..) - else - raw # legacy data, no prefix - end -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :redis_deserialize) - raw -end -``` - -Wire `serialize_value` into `set_sync` and `deserialize_value` into `get`. - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/redis_serialization_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/redis.rb spec/legion/cache/redis_serialization_spec.rb -git commit -m "add transparent JSON serialization for redis driver" -``` - ---- - -### Task 10: Add `enabled?` and `connected?` — both tiers - -**Files:** -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb`, `lib/legion/cache/memory.rb` -- Test: `spec/legion/cache/enabled_spec.rb` (new) - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/enabled_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache' - -RSpec.describe 'enabled? and connected?' do - before do - Legion::Cache.instance_variable_set(:@connected, false) - Legion::Cache.instance_variable_set(:@using_memory, false) - Legion::Cache.instance_variable_set(:@using_local, false) - Legion::Cache::Local.reset! - end - - describe 'Legion::Cache.enabled?' do - it 'returns true when settings enabled is true' do - Legion::Settings[:cache][:enabled] = true - expect(Legion::Cache.enabled?).to be(true) - end - - it 'returns false when settings enabled is false' do - Legion::Settings[:cache][:enabled] = false - expect(Legion::Cache.enabled?).to be(false) - end - end - - describe 'Legion::Cache::Local.enabled?' do - it 'reads from cache_local settings' do - Legion::Settings[:cache_local] ||= {} - Legion::Settings[:cache_local][:enabled] = false - expect(Legion::Cache::Local.enabled?).to be(false) - end - end - - describe 'when disabled' do - before { Legion::Settings[:cache][:enabled] = false } - after { Legion::Settings[:cache][:enabled] = true } - - it 'connected? returns false even if @connected is true' do - Legion::Cache.instance_variable_set(:@connected, true) - expect(Legion::Cache.connected?).to be(false) - end - - it 'get returns nil' do - expect(Legion::Cache.get('anything')).to be_nil - end - - it 'set with async: true returns true (no-op)' do - expect(Legion::Cache.set('k', 'v', async: true)).to be(true) - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/enabled_spec.rb -v` -Expected: FAIL - -**Step 3: Implement enabled?** - -In `lib/legion/cache.rb`: -```ruby -def enabled? - return true unless defined?(Legion::Settings) - - Legion::Settings.dig(:cache, :enabled) != false -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :cache_enabled) - true -end - -def connected? - return false unless enabled? - - @connected == true -end -``` - -Guard all operations: `return nil unless enabled?` at top of `get`, `fetch`, `mget`. For writes: `return true unless enabled?` for async, raise for sync. - -Same pattern in `lib/legion/cache/local.rb` reading from `:cache_local`. - -In `lib/legion/cache/memory.rb` add `enabled?` returning `true` always (memory adapter is always available in lite mode). - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/enabled_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/local.rb lib/legion/cache/memory.rb spec/legion/cache/enabled_spec.rb -git commit -m "add enabled? guard to both cache tiers" -``` - ---- - -### Task 11: Add `stats` method — both tiers - -**Files:** -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` -- Test: `spec/legion/cache/stats_spec.rb` (new) - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/stats_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache' - -RSpec.describe 'stats' do - describe 'Legion::Cache.stats' do - before do - ENV['LEGION_MODE'] = 'lite' - Legion::Cache.setup - end - - after do - Legion::Cache.shutdown - ENV.delete('LEGION_MODE') - end - - it 'returns a hash with required keys' do - stats = Legion::Cache.stats - expect(stats).to be_a(Hash) - expect(stats).to include( - :driver, :servers, :enabled, :connected, - :using_local, :using_memory, - :pool_size, :pool_available, - :async_pool_size, :async_queue_depth, :async_processed, - :reconnect_attempts, :uptime - ) - end - - it 'returns a frozen hash' do - expect(Legion::Cache.stats).to be_frozen - end - - it 'reports correct driver' do - expect(Legion::Cache.stats[:driver]).to eq('memory') - end - end - - describe 'Legion::Cache::Local.stats' do - before { Legion::Cache::Local.reset! } - - it 'responds to stats' do - expect(Legion::Cache::Local).to respond_to(:stats) - end - - it 'returns a hash with required keys' do - stats = Legion::Cache::Local.stats - expect(stats).to include(:driver, :servers, :enabled, :connected) - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/stats_spec.rb -v` -Expected: FAIL — `stats` method doesn't exist. - -**Step 3: Implement stats** - -In `lib/legion/cache.rb`: -```ruby -def stats - { - driver: driver_name, - servers: resolved_servers, - enabled: enabled?, - connected: connected?, - using_local: using_local?, - using_memory: using_memory?, - pool_size: safe_pool_size, - pool_available: safe_pool_available, - async_pool_size: async_writer_pool_size, - async_queue_depth: async_writer_queue_depth, - async_processed: async_writer_processed_count, - reconnect_attempts: reconnector_attempts, - uptime: uptime_seconds - }.freeze -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :cache_stats) - { error: e.message }.freeze -end -``` - -Track `@setup_at = Time.now` in `setup`. Add private helpers for safe pool queries (return 0 when not connected). Async/reconnect stats return 0 for now — they'll be wired in Tasks 13-14. - -Same pattern for `Legion::Cache::Local.stats` (without `using_local`/`using_memory`). - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/stats_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/stats_spec.rb -git commit -m "add stats method to both cache tiers" -``` - ---- - -### Task 12: Add `concurrent-ruby` dependency - -**Files:** -- Modify: `legion-cache.gemspec` - -**Step 1: Add dependency** - -In `legion-cache.gemspec`, add: -```ruby -spec.add_dependency 'concurrent-ruby', '>= 1.2' -``` - -**Step 2: Verify bundle resolves** - -Run: `bundle install` -Expected: resolves successfully (concurrent-ruby already installed as transitive dep). - -**Step 3: Commit** - -```bash -git add legion-cache.gemspec -git commit -m "add concurrent-ruby dependency for async writer" -``` - ---- - -### Task 13: AsyncWriter - -**Files:** -- Create: `lib/legion/cache/async_writer.rb` -- Test: `spec/legion/cache/async_writer_spec.rb` (new) - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/async_writer_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache/async_writer' - -RSpec.describe Legion::Cache::AsyncWriter do - subject(:writer) { described_class.new } - - after { writer.stop(timeout: 2) if writer.running? } - - describe '#start' do - it 'starts the thread pool' do - writer.start - expect(writer.running?).to be(true) - end - - it 'is idempotent' do - writer.start - writer.start - expect(writer.running?).to be(true) - end - end - - describe '#stop' do - it 'drains pending work within timeout' do - writer.start - completed = Concurrent::AtomicBoolean.new(false) - writer.enqueue { completed.make_true } - writer.stop(timeout: 5) - expect(completed.value).to be(true) - expect(writer.running?).to be(false) - end - end - - describe '#enqueue' do - it 'executes the block asynchronously' do - writer.start - result = Concurrent::AtomicReference.new(nil) - writer.enqueue { result.set('done') } - sleep 0.1 - expect(result.get).to eq('done') - end - - it 'increments processed_count' do - writer.start - 3.times { writer.enqueue { nil } } - sleep 0.2 - expect(writer.processed_count).to eq(3) - end - - it 'falls back to synchronous when pool is not running' do - result = nil - writer.enqueue { result = 'sync_fallback' } - expect(result).to eq('sync_fallback') - end - end - - describe '#pool_size' do - it 'returns configured pool size' do - writer.start(pool_size: 2) - expect(writer.pool_size).to eq(2) - end - end - - describe '#queue_depth' do - it 'returns 0 when idle' do - writer.start - sleep 0.05 - expect(writer.queue_depth).to eq(0) - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb -v` -Expected: FAIL — file doesn't exist. - -**Step 3: Implement AsyncWriter** - -Create `lib/legion/cache/async_writer.rb`: - -```ruby -# frozen_string_literal: true - -require 'concurrent-ruby' -require 'legion/logging/helper' - -module Legion - module Cache - class AsyncWriter - include Legion::Logging::Helper - - DEFAULT_POOL_SIZE = 4 - DEFAULT_QUEUE_SIZE = 1000 - DEFAULT_SHUTDOWN_TIMEOUT = 5 - - def initialize(pool_size: nil, queue_size: nil, shutdown_timeout: nil) - @config_pool_size = pool_size - @config_queue_size = queue_size - @config_shutdown_timeout = shutdown_timeout - @processed = Concurrent::AtomicFixnum.new(0) - @executor = nil - @mutex = Mutex.new - end - - def start(pool_size: nil, queue_size: nil, **) - @mutex.synchronize do - return if running? - - ps = pool_size || @config_pool_size || configured_pool_size - qs = queue_size || @config_queue_size || configured_queue_size - - @executor = Concurrent::ThreadPoolExecutor.new( - min_threads: 1, - max_threads: ps, - max_queue: qs, - fallback_policy: :caller_runs - ) - log.info "Legion::Cache::AsyncWriter started pool_size=#{ps} queue_size=#{qs}" - end - end - - def stop(timeout: nil) - @mutex.synchronize do - return unless @executor - - to = timeout || @config_shutdown_timeout || configured_shutdown_timeout - @executor.shutdown - unless @executor.wait_for_termination(to) - @executor.kill - log.warn "Legion::Cache::AsyncWriter force-killed after #{to}s timeout" - end - log.info "Legion::Cache::AsyncWriter stopped processed=#{@processed.value}" - @executor = nil - end - end - - def enqueue(&block) - if running? - @executor.post do - block.call - @processed.increment - rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :async_writer_job) - @processed.increment - end - else - block.call - @processed.increment - rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :async_writer_sync_fallback) - @processed.increment - end - end - - def running? - @executor&.running? == true - end - - def pool_size - @executor&.max_length || 0 - end - - def queue_depth - @executor&.queue_length || 0 - end - - def processed_count - @processed.value - end - - private - - def configured_pool_size - return DEFAULT_POOL_SIZE unless defined?(Legion::Settings) - - Legion::Settings.dig(:cache, :async, :pool_size) || DEFAULT_POOL_SIZE - rescue StandardError - DEFAULT_POOL_SIZE - end - - def configured_queue_size - return DEFAULT_QUEUE_SIZE unless defined?(Legion::Settings) - - Legion::Settings.dig(:cache, :async, :queue_size) || DEFAULT_QUEUE_SIZE - rescue StandardError - DEFAULT_QUEUE_SIZE - end - - def configured_shutdown_timeout - return DEFAULT_SHUTDOWN_TIMEOUT unless defined?(Legion::Settings) - - Legion::Settings.dig(:cache, :async, :shutdown_timeout) || DEFAULT_SHUTDOWN_TIMEOUT - rescue StandardError - DEFAULT_SHUTDOWN_TIMEOUT - end - end - end -end -``` - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/async_writer.rb spec/legion/cache/async_writer_spec.rb -git commit -m "add async writer with concurrent-ruby thread pool" -``` - ---- - -### Task 14: Wire AsyncWriter into Cache and Local - -**Files:** -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` -- Test: `spec/legion/cache/async_integration_spec.rb` (new) - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/async_integration_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache' - -RSpec.describe 'async write integration' do - before do - ENV['LEGION_MODE'] = 'lite' - Legion::Cache.setup - end - - after do - Legion::Cache.shutdown - ENV.delete('LEGION_MODE') - end - - it 'set with async: true returns true immediately' do - expect(Legion::Cache.set('async_key', 'val', async: true)).to be(true) - end - - it 'set with async: false writes synchronously' do - Legion::Cache.set('sync_key', 'val', async: false) - expect(Legion::Cache.get('sync_key')).to eq('val') - end - - it 'set with async: true eventually writes the value' do - Legion::Cache.set('eventual', 'val', async: true) - sleep 0.2 - expect(Legion::Cache.get('eventual')).to eq('val') - end - - it 'stats reports async pool size' do - stats = Legion::Cache.stats - expect(stats[:async_pool_size]).to be_a(Integer) - expect(stats[:async_pool_size]).to be > 0 - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/async_integration_spec.rb -v` -Expected: FAIL — async writer not wired in yet. - -**Step 3: Wire in AsyncWriter** - -In `lib/legion/cache.rb`: -- Add `require 'legion/cache/async_writer'` -- Create `@async_writer = Legion::Cache::AsyncWriter.new` in class body -- In `setup`: call `@async_writer.start` -- In `shutdown`: call `@async_writer.stop(timeout: configured_shutdown_timeout)` -- In `set_async`: `@async_writer.enqueue { set_sync(key, value, ttl: ttl) }`; return `true` -- In `delete_async`: `@async_writer.enqueue { delete_sync(key) }`; return `true` -- In `mset_async`: `@async_writer.enqueue { mset_sync(hash, ttl: ttl) }`; return `true` -- Wire stats: `async_writer_pool_size` returns `@async_writer.pool_size`, etc. - -Same for `lib/legion/cache/local.rb` — its own `AsyncWriter` instance. - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/async_integration_spec.rb -v` -Expected: PASS - -**Step 5: Run full suite** - -Run: `bundle exec rspec --tag ~integration -v` -Expected: PASS - -**Step 6: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/async_integration_spec.rb -git commit -m "wire async writer into cache and local tiers" -``` - ---- - -### Task 15: Reconnector - -**Files:** -- Create: `lib/legion/cache/reconnector.rb` -- Test: `spec/legion/cache/reconnector_spec.rb` (new) - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/reconnector_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache/reconnector' - -RSpec.describe Legion::Cache::Reconnector do - let(:connect_called) { Concurrent::AtomicFixnum.new(0) } - let(:connect_block) { -> { connect_called.increment; raise 'nope' } } - let(:enabled_block) { -> { true } } - - subject(:reconnector) do - described_class.new( - tier: :shared, - connect_block: connect_block, - enabled_block: enabled_block - ) - end - - after { reconnector.stop } - - describe '#start' do - it 'starts a reconnect loop' do - reconnector.start - expect(reconnector.running?).to be(true) - end - - it 'is idempotent' do - reconnector.start - reconnector.start - expect(reconnector.running?).to be(true) - end - end - - describe '#stop' do - it 'stops the reconnect loop' do - reconnector.start - reconnector.stop - expect(reconnector.running?).to be(false) - end - end - - describe 'exponential backoff' do - it 'attempts reconnection with backoff' do - reconnector.start - sleep 1.5 - reconnector.stop - expect(connect_called.value).to be >= 1 - end - - it 'tracks attempt count' do - reconnector.start - sleep 1.5 - reconnector.stop - expect(reconnector.attempts).to be >= 1 - end - end - - describe 'successful reconnect' do - let(:connect_block) { -> { connect_called.increment } } - - it 'stops after successful reconnect' do - reconnector.start - sleep 1.5 - expect(reconnector.running?).to be(false) - expect(connect_called.value).to eq(1) - end - - it 'resets attempts after success' do - reconnector.start - sleep 1.5 - expect(reconnector.attempts).to eq(0) - end - end - - describe 'respects enabled?' do - let(:enabled_block) { -> { false } } - - it 'does not attempt reconnect when disabled' do - reconnector.start - sleep 1.5 - expect(connect_called.value).to eq(0) - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/reconnector_spec.rb -v` -Expected: FAIL — file doesn't exist. - -**Step 3: Implement Reconnector** - -Create `lib/legion/cache/reconnector.rb`: - -```ruby -# frozen_string_literal: true - -require 'legion/logging/helper' - -module Legion - module Cache - class Reconnector - include Legion::Logging::Helper - - DEFAULT_INITIAL_DELAY = 1 - DEFAULT_MAX_DELAY = 60 - - def initialize(tier:, connect_block:, enabled_block:) - @tier = tier - @connect_block = connect_block - @enabled_block = enabled_block - @attempts = Concurrent::AtomicFixnum.new(0) - @thread = nil - @mutex = Mutex.new - @stop_signal = false - end - - def start - @mutex.synchronize do - return if running? - - @stop_signal = false - @thread = Thread.new { reconnect_loop } - log.info "Legion::Cache::Reconnector[#{@tier}] started" - end - end - - def stop - @mutex.synchronize do - @stop_signal = true - @thread&.join(5) - @thread = nil - log.info "Legion::Cache::Reconnector[#{@tier}] stopped" - end - end - - def running? - @thread&.alive? == true - end - - def attempts - @attempts.value - end - - def next_retry_at - @next_retry_at - end - - private - - def reconnect_loop - delay = configured_initial_delay - - until @stop_signal - unless @enabled_block.call - sleep 1 - next - end - - begin - @next_retry_at = Time.now + delay - sleep delay - return if @stop_signal - - @connect_block.call - @attempts.value = 0 - @next_retry_at = nil - log.info "Legion::Cache::Reconnector[#{@tier}] reconnected after #{@attempts.value} attempts" - return - rescue StandardError => e - @attempts.increment - handle_exception(e, level: :warn, handled: true, - operation: :"reconnector_#{@tier}", - attempt: @attempts.value, next_delay: delay) - delay = [delay * 2, configured_max_delay].min - end - end - rescue StandardError => e - handle_exception(e, level: :error, handled: true, operation: :"reconnector_#{@tier}_loop") - end - - def configured_initial_delay - return DEFAULT_INITIAL_DELAY unless defined?(Legion::Settings) - - Legion::Settings.dig(:cache, :reconnect, :initial_delay) || DEFAULT_INITIAL_DELAY - rescue StandardError - DEFAULT_INITIAL_DELAY - end - - def configured_max_delay - return DEFAULT_MAX_DELAY unless defined?(Legion::Settings) - - Legion::Settings.dig(:cache, :reconnect, :max_delay) || DEFAULT_MAX_DELAY - rescue StandardError - DEFAULT_MAX_DELAY - end - end - end -end -``` - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/reconnector_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/reconnector.rb spec/legion/cache/reconnector_spec.rb -git commit -m "add reconnector with exponential backoff" -``` - ---- - -### Task 16: Wire Reconnector into Cache and Local - -**Files:** -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` -- Test: `spec/legion/cache/reconnector_integration_spec.rb` (new) - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/reconnector_integration_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache' - -RSpec.describe 'reconnector integration' do - before do - Legion::Cache.instance_variable_set(:@client, nil) - Legion::Cache.instance_variable_set(:@connected, false) - Legion::Cache.instance_variable_set(:@using_local, false) - Legion::Cache.instance_variable_set(:@using_memory, false) - Legion::Cache.instance_variable_set(:@active_shared_driver, nil) - Legion::Cache::Local.reset! - Legion::Settings[:cache][:enabled] = true - end - - it 'stats reports reconnect_attempts' do - stats = Legion::Cache.stats - expect(stats[:reconnect_attempts]).to be_a(Integer) - end - - it 'setup failure triggers reconnector when enabled' do - allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'refused') - allow(Legion::Cache::Local).to receive(:connected?).and_return(false) - allow(Legion::Cache::Local).to receive(:setup) - - Legion::Cache.setup - - reconnector = Legion::Cache.instance_variable_get(:@reconnector) - expect(reconnector).not_to be_nil - expect(reconnector.running?).to be(true) - - reconnector.stop - end - - it 'does not start reconnector when disabled' do - Legion::Settings[:cache][:enabled] = false - allow(Legion::Cache::Local).to receive(:connected?).and_return(false) - allow(Legion::Cache::Local).to receive(:setup) - - Legion::Cache.setup - - reconnector = Legion::Cache.instance_variable_get(:@reconnector) - expect(reconnector).to be_nil - Legion::Settings[:cache][:enabled] = true - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/reconnector_integration_spec.rb -v` -Expected: FAIL - -**Step 3: Wire Reconnector into lifecycle** - -In `lib/legion/cache.rb`: -- Add `require 'legion/cache/reconnector'` -- In `setup_shared` rescue: if `enabled?` and both shared+local fail, create and start a `Reconnector` with a `connect_block` that retries `setup_shared`. -- In `shutdown`: stop the reconnector if running. -- Wire `reconnector_attempts` into `stats`. - -Same pattern in `lib/legion/cache/local.rb`. - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/reconnector_integration_spec.rb -v` -Expected: PASS - -**Step 5: Run full suite** - -Run: `bundle exec rspec --tag ~integration -v` -Expected: PASS - -**Step 6: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/reconnector_integration_spec.rb -git commit -m "wire reconnector into cache lifecycle" -``` - ---- - -### Task 17: Update Helper module for new signatures - -**Files:** -- Modify: `lib/legion/cache/helper.rb` -- Test: `spec/legion/cache/helper_spec.rb` - -**Step 1: Read existing helper spec to understand current tests** - -Read `spec/legion/cache/helper_spec.rb` and update stubs for new keyword signatures. - -**Step 2: Update Helper methods** - -In `lib/legion/cache/helper.rb`: -- `cache_set` calls `Legion::Cache.set(key, value, ttl: ttl, async: async, phi: phi)` -- `cache_fetch` calls `Legion::Cache.fetch(key, ttl: ttl, &block)` -- `local_cache_set` calls `Legion::Cache::Local.set(key, value, ttl: ttl, async: async, phi: phi)` -- `local_cache_fetch` calls `Legion::Cache::Local.fetch(key, ttl: ttl, &block)` -- Add `async:` parameter to `cache_set`, `cache_delete`, `cache_mset`, `local_cache_set`, `local_cache_delete`, `local_cache_mset` — defaults to `true` (inherits from the underlying methods). -- Update `FALLBACK_TTL` to `3600`. - -**Step 3: Run helper specs** - -Run: `bundle exec rspec spec/legion/cache/helper_spec.rb -v` -Expected: PASS - -**Step 4: Commit** - -```bash -git add lib/legion/cache/helper.rb spec/legion/cache/helper_spec.rb -git commit -m "update helper module for new cache signatures" -``` - ---- - -### Task 18: Update Cacheable module for new signatures - -**Files:** -- Modify: `lib/legion/cache/cacheable.rb` -- Test: `spec/legion/cacheable_spec.rb` - -**Step 1: Update Cacheable** - -In `lib/legion/cache/cacheable.rb`: -- `cache_write` calls `Legion::Cache.set(key, value, ttl: ttl)` (keyword TTL) -- `local_cache_write` calls `Legion::Cache::Local.set(key, value, ttl: ttl)` (keyword TTL) - -**Step 2: Run cacheable specs** - -Run: `bundle exec rspec spec/legion/cacheable_spec.rb -v` -Expected: PASS - -**Step 3: Commit** - -```bash -git add lib/legion/cache/cacheable.rb spec/legion/cacheable_spec.rb -git commit -m "update cacheable module for keyword ttl" -``` - ---- - -### Task 19: Update Settings with new async and reconnect defaults - -**Files:** -- Modify: `lib/legion/cache/settings.rb` -- Test: `spec/legion/settings_spec.rb` - -**Step 1: Write the failing test** - -Add to `spec/legion/settings_spec.rb`: - -```ruby -describe 'async settings' do - it 'includes async defaults' do - expect(Legion::Cache::Settings.default[:async]).to include( - pool_size: 4, - queue_size: 1000, - shutdown_timeout: 5 - ) - end -end - -describe 'reconnect settings' do - it 'includes reconnect defaults' do - expect(Legion::Cache::Settings.default[:reconnect]).to include( - initial_delay: 1, - max_delay: 60, - enabled: true - ) - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/settings_spec.rb -v` -Expected: FAIL - -**Step 3: Add defaults to settings** - -In `lib/legion/cache/settings.rb`, add to `self.default`: -```ruby -async: { - pool_size: 4, - queue_size: 1000, - shutdown_timeout: 5 -}.freeze, -reconnect: { - initial_delay: 1, - max_delay: 60, - enabled: true -}.freeze -``` - -Add same to `self.local` (can use smaller pool_size: 2 for local). - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/settings_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/settings.rb spec/legion/settings_spec.rb -git commit -m "add async and reconnect default settings" -``` - ---- - -### Task 20: Full suite validation and version bump - -**Files:** -- Modify: `lib/legion/cache/version.rb`, `CHANGELOG.md` - -**Step 1: Run full test suite** - -Run: `bundle exec rspec -v` -Expected: All unit specs PASS (integration specs skipped unless servers are running). - -**Step 2: Run rubocop** - -Run: `bundle exec rubocop -A` -Then: `bundle exec rubocop` -Expected: Zero offenses. - -**Step 3: Bump version** - -In `lib/legion/cache/version.rb`, bump to `1.4.0` (this is a minor version bump due to new features: async writes, reconnector, stats, enabled?). - -**Step 4: Update CHANGELOG.md** - -```markdown -## [1.4.0] - 2026-04-06 - -### Added -- Async write support (`async: true` default) via concurrent-ruby ThreadPoolExecutor -- Background reconnector with exponential backoff (1s to 60s) -- `enabled?` method for both shared and local tiers (config-driven) -- `stats` method returning frozen Hash with pool, async, reconnect, and server info -- Transparent JSON serialization for Redis driver (prefix-byte based) -- `mget`/`mset` support on Local tier - -### Changed -- TTL is now keyword-only (`ttl:`) across all drivers and tiers -- Default TTL: global 3600s (1 hour), local 21600s (6 hours) -- All exception handling unified: reads return nil, sync writes re-raise, lifecycle handles internally -- Redis driver catches StandardError instead of Redis::BaseError for consistency -- Removed `flush(delay)` — flush takes no arguments -- Normalized `client` kwargs across Memcached and Redis drivers -- All logging uses `log` via Legion::Logging::Helper consistently - -### Fixed -- Memcached `get` nil-check bug (checked result[0] before result.nil?) -- Memcached `fetch` same nil-check bug -- Local `fetch` same nil-check/JSON-dump bug -``` - -**Step 5: Commit** - -```bash -git add lib/legion/cache/version.rb CHANGELOG.md -git commit -m "bump version to 1.4.0, update changelog" -``` - -**Step 6: Final validation** - -Run: `bundle exec rspec -v && bundle exec rubocop` -Expected: All green. diff --git a/docs/plans/2026-04-06-cache-post-optimization-fixes.md b/docs/plans/2026-04-06-cache-post-optimization-fixes.md deleted file mode 100644 index 09531a0..0000000 --- a/docs/plans/2026-04-06-cache-post-optimization-fixes.md +++ /dev/null @@ -1,1584 +0,0 @@ -# Legion::Cache Post-Optimization Fixes - -> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task. - -**Goal:** Apply adversarial review fixes and connection pool improvements on top of the completed cache optimization work (from `2026-04-06-cache-optimization-plan.md`). - -**Architecture:** Two phases — Phase A fixes issues found by adversarial review that the in-flight implementation won't have addressed. Phase B improves connection pool usage. - -**Tech Stack:** Ruby >= 3.4, concurrent-ruby, Dalli, Redis, ConnectionPool, Legion::Logging, Legion::Settings - -**Prerequisite:** The `2026-04-06-cache-optimization-plan.md` must be fully implemented and merged first. - -**Design doc:** `docs/plans/2026-04-06-cache-optimization-design.md` (adversarial review resolution log at bottom) - ---- - -## Phase A: Adversarial Review Fixes - -These address findings from 3 adversarial reviewers (Sonnet 4.6, Codex gpt-5.3-codex, Codex gpt-5.4) that the in-flight implementation plan does not cover. - ---- - -### Task A1: Force Cacheable and Helper to use async: false - -**Files:** -- Modify: `lib/legion/cache/helper.rb` -- Modify: `lib/legion/cache/cacheable.rb` -- Test: `spec/legion/cache/helper_spec.rb`, `spec/legion/cacheable_spec.rb` - -**Context:** All 3 reviewers flagged that `async: true` default breaks read-after-write patterns in Cacheable and Helper. User decision: keep `async: true` as public default, but internal callers hardcode `async: false`. - -**Step 1: Write the failing tests** - -Add to `spec/legion/cache/helper_spec.rb`: - -```ruby -describe 'cache_set uses synchronous writes' do - it 'passes async: false to Legion::Cache.set' do - expect(Legion::Cache).to receive(:set).with(anything, anything, hash_including(async: false)) - subject.cache_set('key', 'value') - end -end - -describe 'cache_delete uses synchronous writes' do - it 'passes async: false to Legion::Cache.delete' do - expect(Legion::Cache).to receive(:delete).with(anything, hash_including(async: false)) - subject.cache_delete('key') - end -end -``` - -Add to `spec/legion/cacheable_spec.rb`: - -```ruby -describe 'cache_write uses synchronous writes' do - it 'passes async: false to Legion::Cache.set' do - allow(Legion::Cache::Cacheable).to receive(:global_cache_available?).and_return(true) - expect(Legion::Cache).to receive(:set).with('k', 'v', hash_including(async: false)) - Legion::Cache::Cacheable.cache_write('k', 'v', ttl: 60, scope: :global) - end -end -``` - -**Step 2: Run tests to verify they fail** - -Run: `bundle exec rspec spec/legion/cache/helper_spec.rb spec/legion/cacheable_spec.rb -v` -Expected: FAIL — current code does not pass `async: false`. - -**Step 3: Update Helper** - -In `lib/legion/cache/helper.rb`, update all write calls: - -```ruby -def cache_set(key, value, ttl: nil, phi: false) - effective_ttl = ttl || cache_default_ttl - Legion::Cache.set(cache_namespace + key, value, ttl: effective_ttl, async: false, phi: phi) -end - -def cache_delete(key) - Legion::Cache.delete(cache_namespace + key, async: false) -end - -def cache_mset(hash, ttl: nil) - return true if hash.empty? - effective_ttl = ttl || cache_default_ttl - hash.each { |k, v| Legion::Cache.set(cache_namespace + k, v, ttl: effective_ttl, async: false) } - true -rescue StandardError => e - log_cache_error('cache_mset', e) - false -end - -def local_cache_set(key, value, ttl: nil, phi: false) - effective_ttl = ttl || local_cache_default_ttl - effective_ttl = Legion::Cache.enforce_phi_ttl(effective_ttl, phi: phi) - Legion::Cache::Local.set(cache_namespace + key, value, ttl: effective_ttl, async: false) -end - -def local_cache_delete(key) - Legion::Cache::Local.delete(cache_namespace + key, async: false) -end - -def local_cache_mset(hash, ttl: nil) - return true if hash.empty? - effective_ttl = ttl || local_cache_default_ttl - hash.each { |k, v| Legion::Cache::Local.set(cache_namespace + k, v, ttl: effective_ttl, async: false) } - true -rescue StandardError => e - log_cache_error('local_cache_mset', e) - false -end -``` - -**Step 4: Update Cacheable** - -In `lib/legion/cache/cacheable.rb`, update `cache_write` and `local_cache_write`: - -```ruby -def self.cache_write(key, value, ttl:, scope:) - case scope - when :global - if global_cache_available? - Legion::Cache.set(key, value, ttl: ttl, async: false) - else - memory_write(key, value, ttl) - end - else - if local_cache_available? - result = local_cache_write(key, value, ttl) - memory_write(key, value, ttl) unless result - else - memory_write(key, value, ttl) - end - end -end - -def self.local_cache_write(key, value, ttl) - return unless local_cache_available? - Legion::Cache::Local.set(key, value, ttl: ttl, async: false) -rescue StandardError => e - handle_exception(e, level: :warn, operation: :local_cache_write, key: key, ttl: ttl) - nil -end -``` - -**Step 5: Run tests** - -Run: `bundle exec rspec spec/legion/cache/helper_spec.rb spec/legion/cacheable_spec.rb -v` -Expected: PASS - -**Step 6: Commit** - -```bash -git add lib/legion/cache/helper.rb lib/legion/cache/cacheable.rb spec/legion/cache/helper_spec.rb spec/legion/cacheable_spec.rb -git commit -m "force helper and cacheable to use synchronous cache writes" -``` - ---- - -### Task A2: Fix AsyncWriter TOCTOU race in enqueue - -**Files:** -- Modify: `lib/legion/cache/async_writer.rb` -- Test: `spec/legion/cache/async_writer_spec.rb` - -**Context:** Sonnet C-3 and Codex 5.3 F6 flagged that `enqueue` checks `running?` then calls `@executor.post` — another thread can nil `@executor` between the two. - -**Step 1: Write the failing test** - -Add to `spec/legion/cache/async_writer_spec.rb`: - -```ruby -describe 'thread safety' do - it 'handles concurrent stop and enqueue without error' do - writer.start - errors = Concurrent::AtomicFixnum.new(0) - threads = 10.times.map do - Thread.new do - 50.times { writer.enqueue { nil } } - rescue StandardError - errors.increment - end - end - sleep 0.05 - writer.stop(timeout: 2) - threads.each(&:join) - expect(errors.value).to eq(0) - end -end -``` - -**Step 2: Run test** - -Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb -v` -Expected: May pass or fail depending on timing — the fix makes it deterministic. - -**Step 3: Fix enqueue** - -In `lib/legion/cache/async_writer.rb`, change `enqueue` to capture a local reference: - -```ruby -def enqueue(&block) - executor = @executor - if executor&.running? - executor.post do - block.call - @processed.increment - rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :async_writer_job) - @failed.increment - end - else - block.call - @processed.increment - rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :async_writer_sync_fallback) - @failed.increment - end -end -``` - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/async_writer.rb spec/legion/cache/async_writer_spec.rb -git commit -m "fix async writer TOCTOU race in enqueue" -``` - ---- - -### Task A3: Add failed_count to AsyncWriter stats - -**Files:** -- Modify: `lib/legion/cache/async_writer.rb` -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` -- Test: `spec/legion/cache/async_writer_spec.rb`, `spec/legion/cache/stats_spec.rb` - -**Step 1: Write the failing test** - -Add to `spec/legion/cache/async_writer_spec.rb`: - -```ruby -describe '#failed_count' do - it 'tracks failed jobs separately from processed' do - writer.start - writer.enqueue { raise 'boom' } - sleep 0.2 - expect(writer.failed_count).to eq(1) - expect(writer.processed_count).to eq(0) - end -end -``` - -Add to `spec/legion/cache/stats_spec.rb`: - -```ruby -it 'includes async_failed in stats' do - stats = Legion::Cache.stats - expect(stats).to have_key(:async_failed) -end -``` - -**Step 2: Run tests to verify they fail** - -Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb spec/legion/cache/stats_spec.rb -v` -Expected: FAIL - -**Step 3: Add failed_count** - -In `lib/legion/cache/async_writer.rb`: -- Add `@failed = Concurrent::AtomicFixnum.new(0)` in `initialize` -- In rescue inside `enqueue` worker: increment `@failed` instead of `@processed` -- Add `def failed_count; @failed.value; end` - -In `lib/legion/cache.rb` and `lib/legion/cache/local.rb`: -- Add `async_failed: @async_writer.failed_count` to `stats` hash - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb spec/legion/cache/stats_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/async_writer.rb lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/async_writer_spec.rb spec/legion/cache/stats_spec.rb -git commit -m "add failed_count to async writer stats" -``` - ---- - -### Task A4: Fix Reconnector — stop deadlock, AtomicFixnum reset, require concurrent - -**Files:** -- Modify: `lib/legion/cache/reconnector.rb` -- Test: `spec/legion/cache/reconnector_spec.rb` - -**Context:** Three issues in one file: -1. `stop` holds mutex across `thread.join` (Sonnet C-2) -2. `@attempts.value = 0` is invalid on AtomicFixnum (Sonnet H-2) -3. Missing `require 'concurrent'` (Sonnet H-4, Codex 5.3 F11) - -**Step 1: Write the failing tests** - -Add to `spec/legion/cache/reconnector_spec.rb`: - -```ruby -describe 'can be required independently' do - it 'loads without NameError' do - expect { require 'legion/cache/reconnector' }.not_to raise_error - end -end - -describe 'successful reconnect logging' do - let(:connect_block) do - call_count = Concurrent::AtomicFixnum.new(0) - -> { call_count.increment } - end - - it 'does not raise NoMethodError on attempt reset' do - reconnector.start - sleep 1.5 - expect { reconnector.stop }.not_to raise_error - end -end -``` - -**Step 2: Fix reconnector.rb** - -1. Add `require 'concurrent'` at top of file -2. Fix `stop` — release mutex before join: - -```ruby -def stop - thread_to_join = nil - @mutex.synchronize do - @stop_signal.make_true - thread_to_join = @thread - @thread = nil - end - thread_to_join&.join(5) - log.info "Legion::Cache::Reconnector[#{@tier}] stopped" -end -``` - -3. Fix attempt reset in `reconnect_loop`: - -```ruby -count = @attempts.value -@attempts = Concurrent::AtomicFixnum.new(0) -@next_retry_at = nil -log.info "Legion::Cache::Reconnector[#{@tier}] reconnected after #{count} attempts" -``` - -4. Use `Concurrent::AtomicBoolean` for `@stop_signal` instead of plain boolean. - -**Step 3: Run tests** - -Run: `bundle exec rspec spec/legion/cache/reconnector_spec.rb -v` -Expected: PASS - -**Step 4: Commit** - -```bash -git add lib/legion/cache/reconnector.rb spec/legion/cache/reconnector_spec.rb -git commit -m "fix reconnector deadlock, atomic reset, and missing require" -``` - ---- - -### Task A5: Add reconnect_shared! raising method and start reconnector on shared failure - -**Files:** -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` -- Test: `spec/legion/cache/reconnector_integration_spec.rb` - -**Context:** Codex 5.4 F1 and 5.3 F1/F4 flagged that `setup_shared` rescues internally so the reconnector's `connect_block` can never detect failure. Also, the reconnector should start whenever shared fails, even if local succeeds. - -**Step 1: Write the failing tests** - -Add to `spec/legion/cache/reconnector_integration_spec.rb`: - -```ruby -it 'starts reconnector even when local fallback succeeds' do - allow(Legion::Cache).to receive(:client).and_raise(RuntimeError, 'refused') - allow(Legion::Cache::Local).to receive(:connected?).and_return(true) - allow(Legion::Cache::Local).to receive(:setup) - - Legion::Cache.setup - - expect(Legion::Cache.using_local?).to be(true) - reconnector = Legion::Cache.instance_variable_get(:@reconnector) - expect(reconnector).not_to be_nil - expect(reconnector.running?).to be(true) - reconnector.stop -end -``` - -**Step 2: Implement reconnect_shared!** - -In `lib/legion/cache.rb`, add a private method that raises on failure: - -```ruby -def reconnect_shared! - client(**Legion::Settings[:cache], logger: log) - @connected = true - @using_local = false - Legion::Settings[:cache][:connected] = true - log.info 'Legion::Cache shared reconnected' -end -``` - -Update `setup_shared` rescue to start the reconnector when shared fails and `enabled?` is true, regardless of local fallback: - -```ruby -rescue StandardError => e - report_exception(e, level: :warn, handled: true, operation: :setup_shared, fallback: :local) - if Legion::Cache::Local.connected? - @using_local = true - @connected = true - Legion::Settings[:cache][:connected] = true - log.info 'Legion::Cache fell back to Local cache' - else - @connected = false - Legion::Settings[:cache][:connected] = false - log.error 'Legion::Cache shared and local adapters are unavailable' - end - start_reconnector if enabled? -end -``` - -**Step 3: Run tests** - -Run: `bundle exec rspec spec/legion/cache/reconnector_integration_spec.rb -v` -Expected: PASS - -**Step 4: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/reconnector_integration_spec.rb -git commit -m "add raising reconnect path, start reconnector on any shared failure" -``` - ---- - -### Task A6: Guard setup with enabled? check - -**Files:** -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` -- Test: `spec/legion/cache/enabled_spec.rb` - -**Step 1: Write the failing test** - -Add to `spec/legion/cache/enabled_spec.rb`: - -```ruby -describe 'setup respects enabled?' do - it 'does not connect when disabled' do - Legion::Settings[:cache][:enabled] = false - expect(Legion::Cache::Local).not_to receive(:setup) - Legion::Cache.setup - expect(Legion::Cache.connected?).to be(false) - Legion::Settings[:cache][:enabled] = true - end -end -``` - -**Step 2: Add guard** - -In `lib/legion/cache.rb`, add at top of `setup`: -```ruby -def setup(**) - return unless enabled? - return Legion::Settings[:cache][:connected] = true if connected? - # ... rest of setup -end -``` - -Same in `lib/legion/cache/local.rb` `setup`. - -**Step 3: Run tests** - -Run: `bundle exec rspec spec/legion/cache/enabled_spec.rb -v` -Expected: PASS - -**Step 4: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/enabled_spec.rb -git commit -m "guard setup with enabled? check" -``` - ---- - -### Task A7: Make AsyncWriter and Reconnector tier-aware for settings - -**Files:** -- Modify: `lib/legion/cache/async_writer.rb`, `lib/legion/cache/reconnector.rb` -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` -- Test: `spec/legion/cache/async_writer_spec.rb`, `spec/legion/cache/reconnector_spec.rb` - -**Context:** Codex 5.4 F4 flagged that Local tier reads `:cache` settings for async/reconnect instead of `:cache_local`. - -**Step 1: Add settings_key parameter** - -In `lib/legion/cache/async_writer.rb`, accept `settings_key:` in `initialize`: - -```ruby -def initialize(settings_key: :cache, **opts) - @settings_key = settings_key - # ... -end - -def configured_pool_size - return DEFAULT_POOL_SIZE unless defined?(Legion::Settings) - Legion::Settings.dig(@settings_key, :async, :pool_size) || DEFAULT_POOL_SIZE -rescue StandardError - DEFAULT_POOL_SIZE -end -``` - -Same pattern for `configured_queue_size` and `configured_shutdown_timeout`. - -In `lib/legion/cache/reconnector.rb`, accept `settings_key:` in `initialize`: - -```ruby -def initialize(tier:, connect_block:, enabled_block:, settings_key: :cache) - @settings_key = settings_key - # ... -end -``` - -Update `configured_initial_delay` and `configured_max_delay` to use `@settings_key`. - -**Step 2: Wire in both tiers** - -In `lib/legion/cache.rb`: -```ruby -@async_writer = Legion::Cache::AsyncWriter.new(settings_key: :cache) -``` - -In `lib/legion/cache/local.rb`: -```ruby -@async_writer = Legion::Cache::AsyncWriter.new(settings_key: :cache_local) -``` - -Same for reconnector instances. - -**Step 3: Run tests** - -Run: `bundle exec rspec spec/legion/cache/async_writer_spec.rb spec/legion/cache/reconnector_spec.rb -v` -Expected: PASS - -**Step 4: Commit** - -```bash -git add lib/legion/cache/async_writer.rb lib/legion/cache/reconnector.rb lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/async_writer_spec.rb spec/legion/cache/reconnector_spec.rb -git commit -m "make async writer and reconnector tier-aware for settings" -``` - ---- - -### Task A8: Fix Redis serialization for mget and mset_sync - -**Files:** -- Modify: `lib/legion/cache/redis.rb` -- Test: `spec/legion/cache/redis_serialization_spec.rb` - -**Context:** All 3 reviewers flagged that serialization was only applied to `set_sync`/`get`, not `mget`/`mset`. - -**Step 1: Write the failing tests** - -Add to `spec/legion/cache/redis_serialization_spec.rb`: - -```ruby -describe 'mget deserializes values' do - it 'deserializes prefixed values from mget' do - allow(redis).to receive(:mget).and_return(["S\x00hello".b, "J\x00{\"a\":1}".b]) - result = cache.mget('k1', 'k2') - expect(result['k1']).to eq('hello') - expect(result['k2']).to be_a(Hash) - end -end - -describe 'mset_sync serializes values' do - it 'serializes each value through set_sync' do - allow(redis).to receive(:set).and_return('OK') - expect(redis).to receive(:set).with('k1', /\AS\x00/, any_args) - expect(redis).to receive(:set).with('k2', /\AJ\x00/, any_args) - cache.mset_sync({ 'k1' => 'hello', 'k2' => { a: 1 } }, ttl: 60) - end -end -``` - -**Step 2: Implement** - -In `lib/legion/cache/redis.rb`: - -`mget`: Apply `deserialize_value` to each value in the result hash. - -```ruby -def mget(*keys) - keys = keys.flatten - return {} if keys.empty? - - result = client.with do |conn| - if cluster_mode? - cluster_mget(conn, keys) - else - values = conn.mget(*keys) - keys.zip(values).to_h - end - end - result.transform_values { |v| deserialize_value(v) } -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :redis_mget, key_count: keys.size) - {} -end -``` - -`mset_sync`: Implement as per-key `set_sync` to get both serialization and TTL: - -```ruby -def mset_sync(hash, ttl: nil) - return true if hash.empty? - hash.each { |key, value| set_sync(key, value, ttl: ttl) } - true -end -``` - -Also force binary encoding in `deserialize_value`: - -```ruby -def deserialize_value(raw) - return nil if raw.nil? - raw = raw.b if raw.respond_to?(:b) - # ... rest of method -end -``` - -**Step 3: Run tests** - -Run: `bundle exec rspec spec/legion/cache/redis_serialization_spec.rb -v` -Expected: PASS - -**Step 4: Commit** - -```bash -git add lib/legion/cache/redis.rb spec/legion/cache/redis_serialization_spec.rb -git commit -m "apply serialization to mget/mset_sync, force binary encoding" -``` - ---- - -### Task A9: Fix Redis cluster flush to pass auth/TLS options - -**Files:** -- Modify: `lib/legion/cache/redis.rb` -- Test: `spec/legion/cache/redis_cluster_spec.rb` - -**Context:** Codex 5.4 F7 and 5.3 F9 flagged that `cluster_flush` opens raw unauthenticated connections. - -**Step 1: Write the failing test** - -Add to `spec/legion/cache/redis_cluster_spec.rb`: - -```ruby -describe 'cluster_flush passes credentials' do - it 'includes username and password in per-node connections' do - cache = described_class.dup - cache.instance_variable_set(:@connection_opts, { username: 'user', password: 'pass' }) - conn = instance_double(Redis) - node_info = "abc123 10.0.0.1:6379@16379 myself,master - 0 0 1 connected 0-5460\n" - allow(conn).to receive(:cluster).with('nodes').and_return(node_info) - - node_client = instance_double(Redis) - expect(Redis).to receive(:new).with(hash_including(host: '10.0.0.1', port: 6379, username: 'user', password: 'pass')).and_return(node_client) - allow(node_client).to receive(:flushdb) - allow(node_client).to receive(:close) - - cache.send(:cluster_flush, conn) - end -end -``` - -**Step 2: Store connection opts and pass to cluster_flush** - -In `lib/legion/cache/redis.rb`, store credential/TLS opts during `client`: - -```ruby -@connection_opts = { - username: username, - password: password, - timeout: @timeout -}.compact -@connection_opts.merge!(redis_tls_options(port: port.to_i)) if defined?(port) -``` - -Update `cluster_flush` to use stored opts: - -```ruby -def cluster_flush(conn) - node_info = conn.cluster('nodes') - primaries = node_info.lines.select { |l| l.include?('master') }.map { |l| l.split[1].split('@').first } - primaries.each do |addr| - host, port = Legion::Cache::Settings.parse_server_address(addr, default_port: 6379) - node = ::Redis.new(host: host, port: port.to_i, **(@connection_opts || {})) - node.flushdb - node.close - end - true -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :cluster_flush, fallback: :single_flushdb) - conn.flushdb == 'OK' -end -``` - -**Step 3: Run tests** - -Run: `bundle exec rspec spec/legion/cache/redis_cluster_spec.rb -v` -Expected: PASS - -**Step 4: Commit** - -```bash -git add lib/legion/cache/redis.rb spec/legion/cache/redis_cluster_spec.rb -git commit -m "pass auth and TLS options to redis cluster flush per-node connections" -``` - ---- - -### Task A10: Drain async writer before closing pools on shutdown - -**Files:** -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb` -- Test: `spec/legion/cache/async_integration_spec.rb` - -**Context:** Codex 5.3 F6 flagged that shutdown closes clients before the writer is drained, causing async jobs to execute against closed pools. - -**Step 1: Write the failing test** - -Add to `spec/legion/cache/async_integration_spec.rb`: - -```ruby -describe 'shutdown drains async writer before closing pool' do - it 'completes pending async writes before shutdown' do - Legion::Cache.set('drain_test', 'value', async: true) - Legion::Cache.shutdown - # Re-setup to verify the value was written before pool closed - Legion::Cache.setup - expect(Legion::Cache.get('drain_test')).to eq('value') - Legion::Cache.shutdown - end -end -``` - -**Step 2: Fix shutdown order** - -In `lib/legion/cache.rb` `shutdown`: - -```ruby -def shutdown - log.info 'Shutting down Legion::Cache' - # 1. Drain async writer FIRST (while pool is still alive) - @async_writer&.stop(timeout: configured_shutdown_timeout) - # 2. Stop reconnector - @reconnector&.stop - # 3. Now close pools - if @using_memory - Legion::Cache::Memory.shutdown - else - close unless @using_local - Legion::Cache::Local.shutdown if Legion::Cache::Local.connected? - end - @using_local = false - @using_memory = false - @connected = false - Legion::Settings[:cache][:connected] = false -end -``` - -Same order in `lib/legion/cache/local.rb`. - -**Step 3: Run tests** - -Run: `bundle exec rspec spec/legion/cache/async_integration_spec.rb -v` -Expected: PASS - -**Step 4: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/local.rb spec/legion/cache/async_integration_spec.rb -git commit -m "drain async writer before closing pools on shutdown" -``` - ---- - -## Phase B: Connection Pool Improvements - ---- - -### Task B1: Normalize pool_size — remove Redis hardcoded default - -**Files:** -- Modify: `lib/legion/cache/redis.rb` -- Test: `spec/legion/redis_spec.rb` - -**Step 1: Write the failing test** - -Add to `spec/legion/redis_spec.rb`: - -```ruby -describe 'pool_size from settings' do - before do - @cache = described_class.dup - @cache.instance_variable_set(:@client, nil) - @cache.instance_variable_set(:@connected, false) - end - - it 'uses settings pool_size instead of hardcoded 20' do - Legion::Settings[:cache][:pool_size] = 8 - redis_instance = instance_double(Redis) - allow(Redis).to receive(:new).and_return(redis_instance) - @cache.client(servers: ['127.0.0.1:6379']) - expect(@cache.pool_size).to eq(8) - Legion::Settings[:cache][:pool_size] = 10 - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/redis_spec.rb --tag ~integration -v` -Expected: FAIL — Redis hardcodes `pool_size: 20`. - -**Step 3: Remove hardcoded default** - -In `lib/legion/cache/redis.rb`, change `client` signature from `pool_size: 20` to `pool_size: nil`. Resolve inside: - -```ruby -def client(server: nil, servers: [], pool_size: nil, timeout: nil, logger: nil, **opts) - return @client unless @client.nil? - - settings = defined?(Legion::Settings) ? Legion::Settings[:cache] : {} - @pool_size = pool_size || settings[:pool_size] || 10 - @timeout = timeout || settings[:timeout] || 5 - # ... -end -``` - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/redis_spec.rb --tag ~integration -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/redis.rb spec/legion/redis_spec.rb -git commit -m "remove hardcoded pool_size from redis driver, resolve from settings" -``` - ---- - -### Task B2: Separate pool checkout timeout from operation timeout - -**Files:** -- Modify: `lib/legion/cache/settings.rb`, `lib/legion/cache/memcached.rb`, `lib/legion/cache/redis.rb` -- Test: `spec/legion/settings_spec.rb` - -**Step 1: Write the failing test** - -Add to `spec/legion/settings_spec.rb`: - -```ruby -describe 'pool_checkout_timeout' do - it 'has pool_checkout_timeout in global defaults' do - expect(Legion::Cache::Settings.default[:pool_checkout_timeout]).to eq(5) - end - - it 'has pool_checkout_timeout in local defaults' do - expect(Legion::Cache::Settings.local[:pool_checkout_timeout]).to eq(5) - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/settings_spec.rb -v` -Expected: FAIL - -**Step 3: Add setting and wire into drivers** - -In `lib/legion/cache/settings.rb`, add to both `self.default` and `self.local`: -```ruby -pool_checkout_timeout: 5, -``` - -In `lib/legion/cache/memcached.rb` `client`: -```ruby -checkout_timeout = opts[:pool_checkout_timeout] || settings[:pool_checkout_timeout] || @timeout -@client = ConnectionPool.new(size: pool_size, timeout: checkout_timeout) do - Dalli::Client.new(resolved, cache_opts) -end -``` - -In `lib/legion/cache/redis.rb` `client`: -```ruby -checkout_timeout = opts[:pool_checkout_timeout] || settings[:pool_checkout_timeout] || @timeout -@client = ConnectionPool.new(size: pool_size, timeout: checkout_timeout) do - build_redis_client(...) -end -``` - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/settings_spec.rb -v` -Expected: PASS - -**Step 5: Run full suite** - -Run: `bundle exec rspec --tag ~integration -v` -Expected: PASS - -**Step 6: Commit** - -```bash -git add lib/legion/cache/settings.rb lib/legion/cache/memcached.rb lib/legion/cache/redis.rb spec/legion/settings_spec.rb -git commit -m "separate pool checkout timeout from operation timeout" -``` - ---- - -### Task B3: Refactor @connected flags to Concurrent::AtomicBoolean - -**Files:** -- Modify: `lib/legion/cache.rb`, `lib/legion/cache/local.rb`, `lib/legion/cache/memory.rb`, `lib/legion/cache/pool.rb` -- Test: `spec/legion/cache/thread_safety_spec.rb` (new) - -**Context:** Design doc §11 specifies preferring `concurrent-ruby` primitives over raw Mutex/plain booleans. The new code (AsyncWriter, Reconnector) uses them, but existing `@connected`, `@using_local`, `@using_memory` flags in `cache.rb`, `local.rb`, `memory.rb`, and `pool.rb` are plain instance variables with no thread safety guarantees. With the reconnector running in a background thread and async writes in a pool, these flags are now read/written from multiple threads. - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/thread_safety_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache' - -RSpec.describe 'thread-safe state flags' do - describe 'Legion::Cache' do - it 'uses AtomicBoolean for connected state' do - flag = Legion::Cache.instance_variable_get(:@connected) - expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil - end - - it 'uses AtomicBoolean for using_local state' do - flag = Legion::Cache.instance_variable_get(:@using_local) - expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil - end - - it 'uses AtomicBoolean for using_memory state' do - flag = Legion::Cache.instance_variable_get(:@using_memory) - expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil - end - end - - describe 'Legion::Cache::Local' do - it 'uses AtomicBoolean for connected state' do - flag = Legion::Cache::Local.instance_variable_get(:@connected) - expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil - end - end - - describe 'Legion::Cache::Memory' do - it 'uses AtomicBoolean for connected state' do - flag = Legion::Cache::Memory.instance_variable_get(:@connected) - expect(flag).to be_a(Concurrent::AtomicBoolean).or be_nil - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/thread_safety_spec.rb -v` -Expected: FAIL — all flags are plain booleans. - -**Step 3: Refactor flags** - -Add `require 'concurrent'` to each file. - -In `lib/legion/cache.rb` class body: -```ruby -@connected = Concurrent::AtomicBoolean.new(false) -@using_local = Concurrent::AtomicBoolean.new(false) -@using_memory = Concurrent::AtomicBoolean.new(false) -``` - -Update all reads: `@connected == true` → `@connected.true?` -Update all writes: `@connected = true` → `@connected.make_true` / `@connected.make_false` - -In `lib/legion/cache/local.rb`: -```ruby -@connected = Concurrent::AtomicBoolean.new(false) -``` - -Same read/write pattern changes. - -In `lib/legion/cache/memory.rb`: -```ruby -@connected = Concurrent::AtomicBoolean.new(false) -``` - -Same read/write pattern changes. Keep the existing `@mutex` for `@store`/`@expiry` synchronization — that protects data structures, not flags. - -In `lib/legion/cache/pool.rb`: -```ruby -def connected? - @connected&.true? || false -end -``` - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/thread_safety_spec.rb -v` -Expected: PASS - -**Step 5: Run full suite** - -Run: `bundle exec rspec --tag ~integration -v` -Expected: PASS - -**Step 6: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/local.rb lib/legion/cache/memory.rb lib/legion/cache/pool.rb spec/legion/cache/thread_safety_spec.rb -git commit -m "refactor state flags to Concurrent::AtomicBoolean for thread safety" -``` - ---- - -### Task B4: Add mget/mset to Memory adapter - -**Files:** -- Modify: `lib/legion/cache/memory.rb` -- Test: `spec/legion/cache/memory_spec.rb` - -**Context:** Memory adapter has `get`/`set`/`fetch`/`delete`/`flush` but no `mget`/`mset`. The top-level `Legion::Cache` handles Memory mget/mset inline, but for consistency every adapter should implement the full interface. This also future-proofs against Local using Memory as a driver. - -**Step 1: Write the failing tests** - -Add to `spec/legion/cache/memory_spec.rb`: - -```ruby -describe '.mget' do - before { described_class.setup } - - it 'returns a hash of key-value pairs' do - described_class.set('a', 1) - described_class.set('b', 2) - result = described_class.mget('a', 'b', 'missing') - expect(result).to eq({ 'a' => 1, 'b' => 2, 'missing' => nil }) - end - - it 'returns empty hash for empty keys' do - expect(described_class.mget).to eq({}) - end -end - -describe '.mset' do - before { described_class.setup } - - it 'stores multiple key-value pairs' do - described_class.mset({ 'x' => 10, 'y' => 20 }) - expect(described_class.get('x')).to eq(10) - expect(described_class.get('y')).to eq(20) - end - - it 'accepts keyword ttl' do - described_class.mset({ 'exp' => 'val' }, ttl: 0.1) - sleep 0.15 - expect(described_class.get('exp')).to be_nil - end - - it 'returns true on success' do - expect(described_class.mset({ 'a' => 1 })).to be(true) - end - - it 'returns true for empty hash' do - expect(described_class.mset({})).to be(true) - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/memory_spec.rb -v` -Expected: FAIL — `mget`/`mset` not defined. - -**Step 3: Implement** - -In `lib/legion/cache/memory.rb`: - -```ruby -def mget(*keys) - keys = keys.flatten - return {} if keys.empty? - - @mutex.synchronize do - keys.each { |k| expire_if_needed(k) } - keys.to_h { |k| [k, @store[k]] } - end -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :memory_mget) - {} -end - -def mset(hash, ttl: nil) - return true if hash.empty? - - hash.each { |k, v| set(k, v, ttl: ttl) } - true -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :memory_mset) - true -end - -def mset_sync(hash, ttl: nil) - mset(hash, ttl: ttl) -end -``` - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/memory_spec.rb -v` -Expected: PASS - -**Step 5: Commit** - -```bash -git add lib/legion/cache/memory.rb spec/legion/cache/memory_spec.rb -git commit -m "add mget and mset to memory adapter for interface consistency" -``` - ---- - -### Task B5: Update RedisHash to use public client accessor - -**Files:** -- Modify: `lib/legion/cache/redis_hash.rb`, `lib/legion/cache.rb` -- Test: `spec/legion/cache/redis_hash_spec.rb` - -**Context:** `RedisHash` calls `Legion::Cache.instance_variable_get(:@client)` directly in every method (7 occurrences). This bypasses all public API, breaks encapsulation, and will break if `@client` is wrapped in an atomic reference or renamed. Add a public `pool` accessor on `Legion::Cache` and use it instead. - -**Step 1: Write the failing test** - -Add to `spec/legion/cache/redis_hash_spec.rb`: - -```ruby -describe 'does not access @client directly' do - it 'uses Legion::Cache.pool instead of instance_variable_get' do - source = File.read(File.expand_path('../../lib/legion/cache/redis_hash.rb', __dir__)) - expect(source).not_to include('instance_variable_get(:@client)') - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/redis_hash_spec.rb -v` -Expected: FAIL - -**Step 3: Add public pool accessor** - -In `lib/legion/cache.rb`, add to the class << self block: - -```ruby -def pool - @client -end -``` - -In `lib/legion/cache/redis_hash.rb`, replace all occurrences of: -```ruby -Legion::Cache.instance_variable_get(:@client) -``` -with: -```ruby -Legion::Cache.pool -``` - -There are 7 occurrences: `redis_available?`, `hset`, `hgetall`, `hdel`, `zadd`, `zrangebyscore`, `zrem`, `expire`. - -**Step 4: Run tests** - -Run: `bundle exec rspec spec/legion/cache/redis_hash_spec.rb -v` -Expected: PASS - -**Step 5: Run full suite** - -Run: `bundle exec rspec --tag ~integration -v` -Expected: PASS - -**Step 6: Commit** - -```bash -git add lib/legion/cache.rb lib/legion/cache/redis_hash.rb spec/legion/cache/redis_hash_spec.rb -git commit -m "replace direct @client access in redis_hash with public pool accessor" -``` - ---- - -### Task B6: End-to-end lifecycle integration test - -**Files:** -- Create: `spec/legion/cache/lifecycle_spec.rb` - -**Context:** No test covers the full chain: shared fails → failback to local → reconnector starts → reconnector succeeds → operations return to shared. This validates all the pieces work together. - -**Step 1: Write the test** - -Create `spec/legion/cache/lifecycle_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache' - -RSpec.describe 'full cache lifecycle' do - let(:local_store) { {} } - let(:shared_store) { {} } - let(:shared_available) { Concurrent::AtomicBoolean.new(false) } - - before do - Legion::Cache.instance_variable_set(:@client, nil) - Legion::Cache.instance_variable_set(:@connected, Concurrent::AtomicBoolean.new(false)) - Legion::Cache.instance_variable_set(:@using_local, Concurrent::AtomicBoolean.new(false)) - Legion::Cache.instance_variable_set(:@using_memory, Concurrent::AtomicBoolean.new(false)) - Legion::Cache.instance_variable_set(:@active_shared_driver, nil) - Legion::Cache::Local.reset! - - Legion::Settings[:cache][:enabled] = true - Legion::Settings[:cache][:failback_to_local] = true - - # Stub Local - allow(Legion::Cache::Local).to receive(:connected?).and_return(true) - allow(Legion::Cache::Local).to receive(:enabled?).and_return(true) - allow(Legion::Cache::Local).to receive(:setup) - allow(Legion::Cache::Local).to receive(:shutdown) - allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } - allow(Legion::Cache::Local).to receive(:set) do |key, value, **| - local_store[key] = value - true - end - - # Stub shared to fail initially - allow(Legion::Cache).to receive(:client).and_invoke( - ->(**) { raise RuntimeError, 'connection refused' if shared_available.false?; nil } - ) - end - - after do - reconnector = Legion::Cache.instance_variable_get(:@reconnector) - reconnector&.stop - Legion::Settings[:cache][:enabled] = true - Legion::Settings[:cache][:failback_to_local] = true - end - - it 'fails back to local, then recovers when shared comes back' do - # Phase 1: shared fails, falls back to local - Legion::Cache.setup - expect(Legion::Cache.using_local?).to be(true) - - # Phase 2: operations work via local - Legion::Cache.set('lifecycle', 'local_value', async: false) - expect(Legion::Cache.get('lifecycle')).to eq('local_value') - expect(local_store['lifecycle']).to eq('local_value') - - # Phase 3: shared comes back - shared_available.make_true - - # Phase 4: verify reconnector was started - reconnector = Legion::Cache.instance_variable_get(:@reconnector) - expect(reconnector).not_to be_nil - - # Cleanup - reconnector.stop - end - - it 'returns nil everywhere when both shared and local are down and failback is off' do - Legion::Settings[:cache][:failback_to_local] = false - allow(Legion::Cache::Local).to receive(:connected?).and_return(false) - - Legion::Cache.setup - expect(Legion::Cache.get('anything')).to be_nil - end -end -``` - -**Step 2: Run test** - -Run: `bundle exec rspec spec/legion/cache/lifecycle_spec.rb -v` -Expected: PASS (this test is written against the expected final state after all prior tasks) - -**Step 3: Commit** - -```bash -git add spec/legion/cache/lifecycle_spec.rb -git commit -m "add end-to-end lifecycle integration test" -``` - ---- - -### Task B7: Automatic failback to Local when shared is unavailable - -**Files:** -- Modify: `lib/legion/cache/settings.rb`, `lib/legion/cache.rb` -- Test: `spec/legion/cache/failback_spec.rb` (new) - -**Context:** When `Legion::Cache.enabled? == false` or `Legion::Cache.connected? == false` due to sustained failure, all operations should silently delegate to `Legion::Cache::Local` instead of returning nil/raising. Controlled by `Legion::Settings[:cache][:failback_to_local]` (default `true`). - -**Step 1: Write the failing tests** - -Create `spec/legion/cache/failback_spec.rb`: - -```ruby -# frozen_string_literal: true - -require 'spec_helper' -require 'legion/cache' - -RSpec.describe 'failback to local' do - let(:local_store) { {} } - - before do - Legion::Cache.instance_variable_set(:@client, nil) - Legion::Cache.instance_variable_set(:@connected, false) - Legion::Cache.instance_variable_set(:@using_local, false) - Legion::Cache.instance_variable_set(:@using_memory, false) - Legion::Cache.instance_variable_set(:@active_shared_driver, nil) - Legion::Settings[:cache][:failback_to_local] = true - - allow(Legion::Cache::Local).to receive(:connected?).and_return(true) - allow(Legion::Cache::Local).to receive(:enabled?).and_return(true) - allow(Legion::Cache::Local).to receive(:get) { |key| local_store[key] } - allow(Legion::Cache::Local).to receive(:set) do |key, value, **| - local_store[key] = value - true - end - allow(Legion::Cache::Local).to receive(:delete) do |key, **| - !local_store.delete(key).nil? - end - allow(Legion::Cache::Local).to receive(:fetch) do |key, **opts, &block| - next local_store[key] if local_store.key?(key) - value = block&.call - local_store[key] = value - value - end - allow(Legion::Cache::Local).to receive(:flush) do - local_store.clear - true - end - end - - after do - Legion::Settings[:cache][:enabled] = true - Legion::Settings[:cache][:failback_to_local] = true - end - - describe 'when shared is disabled' do - before { Legion::Settings[:cache][:enabled] = false } - - it 'get delegates to Local' do - local_store['key'] = 'value' - expect(Legion::Cache.get('key')).to eq('value') - end - - it 'set delegates to Local' do - Legion::Cache.set('key', 'value', async: false) - expect(local_store['key']).to eq('value') - end - - it 'fetch delegates to Local' do - result = Legion::Cache.fetch('miss', ttl: 60) { 'computed' } - expect(result).to eq('computed') - expect(local_store['miss']).to eq('computed') - end - - it 'delete delegates to Local' do - local_store['del'] = 'gone' - Legion::Cache.delete('del', async: false) - expect(local_store['del']).to be_nil - end - - it 'flush delegates to Local' do - local_store['a'] = 1 - Legion::Cache.flush - expect(local_store).to be_empty - end - end - - describe 'when shared is disconnected (failure)' do - before do - Legion::Settings[:cache][:enabled] = true - Legion::Cache.instance_variable_set(:@connected, false) - end - - it 'get delegates to Local' do - local_store['key'] = 'value' - expect(Legion::Cache.get('key')).to eq('value') - end - - it 'set delegates to Local' do - Legion::Cache.set('key', 'value', async: false) - expect(local_store['key']).to eq('value') - end - end - - describe 'when failback_to_local is false' do - before do - Legion::Settings[:cache][:enabled] = false - Legion::Settings[:cache][:failback_to_local] = false - end - - it 'get returns nil instead of delegating' do - local_store['key'] = 'value' - expect(Legion::Cache.get('key')).to be_nil - end - end - - describe 'when Local is also not connected' do - before do - Legion::Settings[:cache][:enabled] = false - allow(Legion::Cache::Local).to receive(:connected?).and_return(false) - end - - it 'get returns nil' do - expect(Legion::Cache.get('key')).to be_nil - end - end -end -``` - -**Step 2: Run test to verify it fails** - -Run: `bundle exec rspec spec/legion/cache/failback_spec.rb -v` -Expected: FAIL — no failback logic exists yet. - -**Step 3: Add setting** - -In `lib/legion/cache/settings.rb`, add to `self.default`: -```ruby -failback_to_local: true, -``` - -**Step 4: Add failback logic to Legion::Cache** - -In `lib/legion/cache.rb`, add a private helper: - -```ruby -def failback_to_local? - return false unless Legion::Cache::Local.connected? - - setting = if defined?(Legion::Settings) - Legion::Settings.dig(:cache, :failback_to_local) != false - else - true - end - setting && (!enabled? || !@connected) -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :cache_failback_check) - false -end -``` - -Update each operation method to check failback before returning nil/raising. For `get`: - -```ruby -def get(key) - return Legion::Cache::Memory.get(key) if @using_memory - return Legion::Cache::Local.get(key) if @using_local - return Legion::Cache::Local.get(key) if failback_to_local? - - configure_shared_adapter! - super -rescue StandardError => e - handle_exception(e, level: :warn, handled: true, operation: :cache_get, key: key) - nil -end -``` - -Same pattern for `set`, `fetch`, `delete`, `flush`, `mget`, `mset` — check `failback_to_local?` and delegate to `Legion::Cache::Local` before the `enabled?` nil-return or the shared adapter path. - -**Step 5: Run tests** - -Run: `bundle exec rspec spec/legion/cache/failback_spec.rb -v` -Expected: PASS - -**Step 6: Run full suite** - -Run: `bundle exec rspec --tag ~integration -v` -Expected: PASS - -**Step 7: Commit** - -```bash -git add lib/legion/cache/settings.rb lib/legion/cache.rb spec/legion/cache/failback_spec.rb -git commit -m "add automatic failback to local when shared cache is unavailable" -``` - ---- - -### Task B8: Full validation and version bump - -**Files:** -- Modify: `lib/legion/cache/version.rb`, `CHANGELOG.md` - -**Step 1: Run full test suite** - -Run: `bundle exec rspec -v` -Expected: All unit specs PASS. - -**Step 2: Run rubocop** - -Run: `bundle exec rubocop -A && bundle exec rubocop` -Expected: Zero offenses. - -**Step 3: Bump version** - -In `lib/legion/cache/version.rb`, bump patch: `1.4.0` -> `1.4.1`. - -**Step 4: Update CHANGELOG.md** - -```markdown -## [1.4.1] - 2026-04-06 - -### Fixed -- AsyncWriter TOCTOU race condition in enqueue (capture local executor reference) -- Reconnector deadlock on stop (release mutex before thread.join) -- Reconnector NoMethodError on successful reconnect (AtomicFixnum reset) -- Missing require 'concurrent' in reconnector.rb -- Redis cluster flush now passes auth/TLS credentials to per-node connections -- Async writer drains before pool close on shutdown -- Serialization applied to mget/mset_sync (was only on set_sync/get) -- Binary encoding forced before serialization prefix checks - -### Added -- Automatic failback to Local tier when shared cache is disabled or disconnected (configurable via `failback_to_local: true`) -- mget/mset methods on Memory adapter for interface consistency -- Public `pool` accessor on Legion::Cache (replaces direct @client access) -- End-to-end lifecycle integration test (shared fail -> local failback -> reconnect) - -### Changed -- Helper and Cacheable use async: false for read-after-write consistency -- AsyncWriter and Reconnector are tier-aware (read :cache_local for local tier) -- Redis driver pool_size resolved from settings (was hardcoded to 20) -- Pool checkout timeout separated from operation timeout (new pool_checkout_timeout setting) -- Reconnector starts on any shared failure (even when local fallback succeeds) -- setup/setup_shared guarded by enabled? check -- Separate failed_count counter in AsyncWriter stats -- State flags (@connected, @using_local, @using_memory) refactored to Concurrent::AtomicBoolean -- RedisHash uses public pool accessor instead of instance_variable_get(:@client) -``` - -**Step 5: Commit** - -```bash -git add lib/legion/cache/version.rb CHANGELOG.md -git commit -m "bump version to 1.4.1, update changelog with post-optimization fixes" -``` - -**Step 6: Final validation** - -Run: `bundle exec rspec -v && bundle exec rubocop` -Expected: All green. From 909d231b465a8de58c9d9bd9ca74e6f9abcac5d0 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 14:22:05 -0500 Subject: [PATCH 105/108] add failback_to_local? branch to mget and mset_sync for consistent bulk read behavior --- lib/legion/cache.rb | 2 ++ spec/legion/cache/failback_spec.rb | 7 +++++++ 2 files changed, 9 insertions(+) diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index c3ccf5d..3879eb8 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -240,6 +240,7 @@ def mget(*keys) return {} if keys.empty? return keys.to_h { |key| [key, Legion::Cache::Memory.get(key)] } if using_memory? return Legion::Cache::Local.mget(*keys) if using_local? + return Legion::Cache::Local.mget(*keys) if failback_to_local? configure_shared_adapter! super @@ -260,6 +261,7 @@ def mset_sync(hash, ttl: nil, **) return true if hash.empty? return hash.each { |key, value| Legion::Cache::Memory.set_sync(key, value, ttl: ttl) } && true if using_memory? return Legion::Cache::Local.mset(hash, ttl: ttl) if using_local? + return Legion::Cache::Local.mset(hash, ttl: ttl) if failback_to_local? configure_shared_adapter! super diff --git a/spec/legion/cache/failback_spec.rb b/spec/legion/cache/failback_spec.rb index 0bd01fa..274132f 100644 --- a/spec/legion/cache/failback_spec.rb +++ b/spec/legion/cache/failback_spec.rb @@ -62,6 +62,13 @@ expect(local_store['key']).to eq('value') end + it 'mget delegates to Local' do + local_store['a'] = 1 + local_store['b'] = 2 + allow(Legion::Cache::Local).to receive(:mget).with('a', 'b').and_return({ 'a' => 1, 'b' => 2 }) + expect(Legion::Cache.mget('a', 'b')).to eq({ 'a' => 1, 'b' => 2 }) + end + it 'fetch delegates to Local' do result = Legion::Cache.fetch('miss', ttl: 60) { 'computed' } expect(result).to eq('computed') From 34ccde9c524e501f577e2e6e94ee23ae9acb5bb9 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 6 Apr 2026 14:23:16 -0500 Subject: [PATCH 106/108] use normalized @pool_size in memcached ConnectionPool.new to prevent nil size --- lib/legion/cache/memcached.rb | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index f68b0af..7f31f19 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -38,7 +38,7 @@ def client(server: nil, servers: nil, pool_size: nil, timeout: nil, # rubocop:di cache_opts[:ssl_context] = tls_ctx if tls_ctx checkout_timeout = opts[:pool_checkout_timeout] || settings[:pool_checkout_timeout] || @timeout - @client = ConnectionPool.new(size: pool_size, timeout: checkout_timeout) do + @client = ConnectionPool.new(size: @pool_size, timeout: checkout_timeout) do Dalli::Client.new(resolved, cache_opts) end From 80547b6be90a09fa5512a20dda5e7c3b037c2762 Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 13 Apr 2026 18:49:24 -0500 Subject: [PATCH 107/108] fleet(cache): add set_nx to all three cache drivers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Adds Legion::Cache.set_nx(key, value, ttl:) — a compare-and-set primitive that returns true if the key was written (race won) and false if the key already existed. - Redis: conn.set(key, serialized, nx: true, ex: ttl) - Memcached: conn.add(key, value, ttl) — native atomic add semantics - Memory: mutex-guarded check-and-set with TTL expiry awareness - Facade (Legion::Cache): routes to the active driver; falls back through local/memory tiers following the same pattern as set Specs cover: win/lose semantics, TTL expiry, concurrency (10 threads), serialization pass-through, and the public interface contract. Also fixes a pre-existing helper_spec JSON key assertion that broke when Legion::JSON.dump switched to pretty-print output. --- lib/legion/cache.rb | 13 ++++ lib/legion/cache/memcached.rb | 10 +++ lib/legion/cache/memory.rb | 19 +++++ lib/legion/cache/redis.rb | 11 +++ spec/legion/cache/helper_spec.rb | 6 +- spec/legion/cache/set_nx_spec.rb | 116 ++++++++++++++++++++++++++++ spec/legion/cache_interface_spec.rb | 10 +++ 7 files changed, 184 insertions(+), 1 deletion(-) create mode 100644 spec/legion/cache/set_nx_spec.rb diff --git a/lib/legion/cache.rb b/lib/legion/cache.rb index 3879eb8..e1f486e 100644 --- a/lib/legion/cache.rb +++ b/lib/legion/cache.rb @@ -190,6 +190,19 @@ def set(key, value, ttl: nil, async: true, phi: false) end end + def set_nx(key, value, ttl: nil) + effective_ttl = resolve_ttl(ttl) + return Legion::Cache::Memory.set_nx(key, value, ttl: effective_ttl) if using_memory? + return Legion::Cache::Local.set_nx(key, value, ttl: effective_ttl) if using_local? + return Legion::Cache::Local.set_nx(key, value, ttl: effective_ttl) if failback_to_local? + + configure_shared_adapter! + super + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :cache_set_nx, key: key) + false + end + def set_sync(key, value, ttl: nil, **) return Legion::Cache::Memory.set_sync(key, value, ttl: ttl) if using_memory? return Legion::Cache::Local.set_sync(key, value, ttl: ttl) if using_local? diff --git a/lib/legion/cache/memcached.rb b/lib/legion/cache/memcached.rb index 7f31f19..ad339b4 100644 --- a/lib/legion/cache/memcached.rb +++ b/lib/legion/cache/memcached.rb @@ -76,6 +76,16 @@ def fetch(key, ttl: nil, &) nil end + def set_nx(key, value, ttl: nil) + effective_ttl = ttl || default_ttl + result = client.with { |conn| conn.add(key, value, effective_ttl) == true } + log.debug { "[cache] SET_NX #{key} ttl=#{effective_ttl.inspect} result=#{result}" } + result + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :memcached_set_nx, key: key, ttl: effective_ttl) + raise + end + def set(key, value, ttl: nil, **) set_sync(key, value, ttl: ttl, **) end diff --git a/lib/legion/cache/memory.rb b/lib/legion/cache/memory.rb index d2eb52d..891b80e 100644 --- a/lib/legion/cache/memory.rb +++ b/lib/legion/cache/memory.rb @@ -55,6 +55,25 @@ def set(key, value, ttl: nil, async: true, phi: false) # rubocop:disable Lint/Un set_sync(key, value, ttl: ttl, phi: phi) end + def set_nx(key, value, ttl: nil) + @mutex.synchronize do + expire_if_needed(key) + return false if @store.key?(key) + + @store[key] = value + if ttl&.positive? + @expiry[key] = Time.now + ttl + else + @expiry.delete(key) + end + log.debug { "[cache:memory] SET_NX #{key} ttl=#{ttl.inspect} result=true" } + true + end + rescue StandardError => e + handle_exception(e, level: :warn, handled: true, operation: :memory_set_nx) + false + end + def set_sync(key, value, ttl: nil, phi: false) ttl = enforce_phi_ttl(ttl, phi: phi) if phi @mutex.synchronize do diff --git a/lib/legion/cache/redis.rb b/lib/legion/cache/redis.rb index 9b75793..153237f 100644 --- a/lib/legion/cache/redis.rb +++ b/lib/legion/cache/redis.rb @@ -100,6 +100,17 @@ def fetch(key, ttl: nil) result end + def set_nx(key, value, ttl: nil) + effective_ttl = ttl || default_ttl + serialized = serialize_value(value) + result = client.with { |conn| conn.set(key, serialized, nx: true, ex: effective_ttl) == 'OK' } + log.debug { "[cache] SET_NX #{key} ttl=#{effective_ttl.inspect} result=#{result}" } + result + rescue StandardError => e + handle_exception(e, level: :error, handled: false, operation: :redis_set_nx, key: key, ttl: effective_ttl) + raise + end + def set(key, value, ttl: nil, **) set_sync(key, value, ttl: ttl, **) end diff --git a/spec/legion/cache/helper_spec.rb b/spec/legion/cache/helper_spec.rb index ed54972..c2a993a 100644 --- a/spec/legion/cache/helper_spec.rb +++ b/spec/legion/cache/helper_spec.rb @@ -459,7 +459,11 @@ def cache_default_ttl it 'serializes hash as JSON via cache set (merge)' do allow(Legion::Cache).to receive(:get).with('microsoft_teams:h').and_return(nil) - expect(Legion::Cache).to receive(:set).with('microsoft_teams:h', '{"f":"v"}', ttl: 3600, async: false) + expect(Legion::Cache).to receive(:set) do |key, json, **opts| + expect(key).to eq('microsoft_teams:h') + expect(opts).to eq(ttl: 3600, async: false) + expect(Legion::JSON.load(json)).to eq(f: 'v') + end subject.cache_hset(':h', { 'f' => 'v' }) end diff --git a/spec/legion/cache/set_nx_spec.rb b/spec/legion/cache/set_nx_spec.rb new file mode 100644 index 0000000..ee2a3f6 --- /dev/null +++ b/spec/legion/cache/set_nx_spec.rb @@ -0,0 +1,116 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'legion/cache/redis' +require 'legion/cache/memcached' +require 'legion/cache/memory' + +RSpec.describe 'Legion::Cache set_nx' do + describe Legion::Cache::Memory do + before { described_class.reset! } + + describe '.set_nx' do + it 'returns true and stores value when key does not exist' do + result = described_class.set_nx('nx-key', 'value', ttl: 60) + expect(result).to be true + expect(described_class.get('nx-key')).to eq('value') + end + + it 'returns false and does not overwrite when key already exists' do + described_class.set('nx-key', 'original', ttl: 60) + result = described_class.set_nx('nx-key', 'overwrite', ttl: 60) + expect(result).to be false + expect(described_class.get('nx-key')).to eq('original') + end + + it 'returns true after an expired key has been purged' do + described_class.set('nx-expire', 'old', ttl: 0.05) + sleep 0.07 + result = described_class.set_nx('nx-expire', 'new', ttl: 60) + expect(result).to be true + expect(described_class.get('nx-expire')).to eq('new') + end + + it 'is atomic under concurrent access' do + winners = [] + mutex = Mutex.new + threads = 10.times.map do |i| + Thread.new do + won = described_class.set_nx('race-key', "value-#{i}", ttl: 60) + mutex.synchronize { winners << i } if won + end + end + threads.each(&:join) + expect(winners.size).to eq(1) + end + end + end + + describe Legion::Cache::Redis do + let(:cache) { described_class.dup } + let(:pool) { instance_double(ConnectionPool) } + let(:redis) { instance_double(Redis) } + + before do + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + allow(pool).to receive(:with).and_yield(redis) + end + + describe '#set_nx' do + it 'returns true when Redis SET NX succeeds (returns "OK")' do + allow(redis).to receive(:set).with('nx-key', anything, nx: true, ex: 60).and_return('OK') + expect(cache.set_nx('nx-key', 'value', ttl: 60)).to be true + end + + it 'returns false when Redis SET NX fails (key exists, returns nil)' do + allow(redis).to receive(:set).with('nx-key', anything, nx: true, ex: 60).and_return(nil) + expect(cache.set_nx('nx-key', 'value', ttl: 60)).to be false + end + + it 'passes nx: true and ex: ttl to Redis SET' do + expect(redis).to receive(:set).with('nx-key', anything, nx: true, ex: 120).and_return('OK') + cache.set_nx('nx-key', 'value', ttl: 120) + end + + it 'serializes the value before storing' do + captured = nil + allow(redis).to receive(:set) do |_key, val, **_opts| + captured = val + 'OK' + end + cache.set_nx('nx-key', { data: 42 }, ttl: 60) + expect(captured).to be_a(String) + end + end + end + + describe Legion::Cache::Memcached do + let(:cache) { described_class.dup } + let(:pool) { instance_double(ConnectionPool) } + let(:dalli) { instance_double(Dalli::Client) } + + before do + cache.instance_variable_set(:@client, pool) + cache.instance_variable_set(:@connected, true) + allow(pool).to receive(:with).and_yield(dalli) + end + + describe '#set_nx' do + it 'returns true when Dalli#add succeeds (key did not exist)' do + allow(dalli).to receive(:add).with('nx-key', 'value', 60).and_return(true) + expect(cache.set_nx('nx-key', 'value', ttl: 60)).to be true + end + + it 'returns false when Dalli#add fails (key already exists, returns nil/false)' do + allow(dalli).to receive(:add).with('nx-key', 'value', 60).and_return(nil) + expect(cache.set_nx('nx-key', 'value', ttl: 60)).to be false + end + + it 'passes the ttl positionally to Dalli#add' do + expect(dalli).to receive(:add).with('nx-key', 'value', 90).and_return(true) + cache.set_nx('nx-key', 'value', ttl: 90) + end + end + end +end diff --git a/spec/legion/cache_interface_spec.rb b/spec/legion/cache_interface_spec.rb index 535a8e0..8b0e362 100644 --- a/spec/legion/cache_interface_spec.rb +++ b/spec/legion/cache_interface_spec.rb @@ -84,4 +84,14 @@ it 'responds to enabled?' do expect(Legion::Cache).to respond_to(:enabled?) end + + it 'has set_nx method' do + expect(Legion::Cache.method(:set_nx)).to be_a(Method) + end + + it 'set_nx accepts keyword ttl' do + params = Legion::Cache.method(:set_nx).parameters + names = params.map(&:last) + expect(names).to include(:ttl) + end end From c7d1ced6852c0de88668c22a7edb1858795ee3be Mon Sep 17 00:00:00 2001 From: Esity Date: Mon, 13 Apr 2026 19:14:38 -0500 Subject: [PATCH 108/108] bump version to 1.4.2 for fleet set_nx addition --- lib/legion/cache/version.rb | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/legion/cache/version.rb b/lib/legion/cache/version.rb index c1adbef..910f71a 100644 --- a/lib/legion/cache/version.rb +++ b/lib/legion/cache/version.rb @@ -2,6 +2,6 @@ module Legion module Cache - VERSION = '1.4.1' + VERSION = '1.4.2' end end