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- Introduced ProviderRuntimeStats struct to capture metrics such as call count, total duration, average duration, last duration, last error, and last run timestamp. - Enhanced GetProviderDetails to include function file and line number for better debugging. - Implemented GetProviderRuntimeStats method to return sorted runtime statistics for all providers. - Added recordProviderStat method to track provider execution metrics. - Updated the Dix struct to maintain provider statistics. - Modified error handling to optionally print stack traces based on log level. - Added tests for runtime statistics retrieval and validation of provider initialization. - Created new server runtime test file to validate HTTP endpoint for runtime stats.
… logging - Implemented a new tracing system in `dixtrace` package to manage spans and events. - Added `RunDetachedSpan` and `BeginSpan` functions for span creation and management. - Introduced `MemorySink` and `FileSink` for event storage and querying. - Created tests for tracing functionality, ensuring correct span relationships and event logging. - Updated HTTP server logs to include new trace endpoint.
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Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request significantly enhances the diagnostic and observability capabilities of the Highlights
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Code Review
This pull request introduces comprehensive diagnostic and tracing capabilities to the dependency injection framework. Key changes include adding provider timeout and slow provider warning options, implementing context-aware injection methods, and introducing a new dixtrace package for in-memory event tracing. It also adds support for collecting detailed diagnostic records to a file (DIX_DIAG_FILE) and exposes new HTTP API endpoints in dixhttp for querying runtime statistics, recent errors, diagnostic files, and trace timelines. The documentation has been updated to reflect these new features, and the InjectContext function was corrected to prevent silent failures when injecting into struct values by requiring a pointer.
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/gemini review |
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Code Review
This pull request introduces a comprehensive set of features for diagnostics, tracing, and observability. This includes provider timeouts, slow provider warnings, detailed error recording, and a new dixtrace package for lightweight tracing. The dixhttp web UI is enhanced with new endpoints to visualize this data. The changes are extensive and well-tested. I have a few suggestions regarding code consistency, particularly with hardcoded language strings and file handling behavior, to improve maintainability and user experience.
| func buildErrorHint(operation, stage string, timedOut bool) string { | ||
| if timedOut { | ||
| return "provider 初始化超时：可先优化初始化逻辑，或临时调大 WithProviderTimeout；排查时可用 /api/errors 与 /api/runtime-stats 联动定位" | ||
| } | ||
|
|
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| switch operation { | ||
| case "provide", "try_provide": | ||
| return "检查 provider 签名（必须是函数且返回值数量合法）；若不希望中断启动，请优先用 TryProvide 并继续启动 Web 诊断页" | ||
| case "inject", "try_inject": | ||
| switch stage { | ||
| case "cycle_check": | ||
| return "检测到循环依赖：请拆分相互引用的组件，或改为接口/延迟注入；可用 /api/dependencies 观察依赖环" | ||
| default: | ||
| return "注入失败：先确认依赖是否已注册、类型是否一致；生产路径建议改用 TryInject 避免进程直接退出" | ||
| } | ||
| case "provider_execute": | ||
| switch stage { | ||
| case "resolve_input": | ||
| return "provider 输入依赖未解析：检查对应输入类型是否有 provider、命名空间(map/list)是否匹配、是否遗漏导入" | ||
| case "return_error": | ||
| return "provider 主动返回 error：优先检查外部资源可用性（DB/Redis/HTTP）与配置参数；必要时在 provider 内增加上下文日志" | ||
| default: | ||
| return "provider 执行失败：查看 provider_function、output_type 与 input_types 定位具体构造链路" | ||
| } | ||
| default: | ||
| return "可先查看 /api/errors 获取最近错误详情，并结合 /api/runtime-stats 定位慢/失败 provider" | ||
| } | ||
| } |
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The error hints in buildErrorHint are hardcoded in Chinese. While helpful, this is inconsistent with the rest of the library's code and documentation, which is in English. This could pose a challenge for non-Chinese speaking users and for future maintenance. It would be better to either provide these hints in English or implement a simple internationalization (i18n) mechanism.
| logStartupScenarioResult(di, "provider_timeout", err, before) | ||
| } | ||
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| // 循环依赖演示使用临时容器，避免污染主容器导致后续所有注入失败。 |
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This comment is in Chinese, while the rest of the code and comments in this file are in English. For consistency and to make the example accessible to a wider audience, it would be better to write comments in English.
dixtrace/trace.go
Outdated
| if dir != "." && dir != "" { | ||
| _ = os.MkdirAll(dir, 0o755) | ||
| } | ||
| fd, err := os.OpenFile(f.path, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o644) |
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The FileSink for DIX_TRACE_FILE truncates the file on creation (O_TRUNC), while the sink for DIX_DIAG_FILE (in dixinternal/diag_file.go) appends to its file. This inconsistency can be surprising and lead to data loss if a user expects trace files to be appended across application restarts. It would be better to use O_APPEND for consistency with DIX_DIAG_FILE, or clearly document this truncating behavior.
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Actionable comments posted: 4
Caution
Some comments are outside the diff and can’t be posted inline due to platform limitations.
⚠️ Outside diff range comments (3)
dixhttp/README.md (1)
405-414:⚠️ Potential issue | 🟡 MinorMarkdown syntax issue: unclosed code block.
The JSON code block for
/api/type/{typeName}?depth=2(starting around line 395) is not properly closed before the next### GET /api/group-rulessection. There's also an extra closing triple-backtick at line 414 that appears orphaned.📝 Suggested fix
] } +``` ### GET `/api/group-rules` Returns backend-registered group rules (used as UI defaults) ```json [ {"name": "service", "prefixes": ["github.com/acme/app/service"]} ]-```
</details> <details> <summary>🤖 Prompt for AI Agents</summary>Verify each finding against the current code and only fix it if needed.
In
@dixhttp/README.mdaround lines 405 - 414, The README has an unclosed JSON
code block for the GET/api/type/{typeName}?depth=2section and an orphaned
triple-backtick before the### GET /api/group-rulesheading; close the earlier
JSON block properly (add the missingjson block terminator) and remove the extra standalonethat follows the### GET /api/group-rulessection so both
code blocks are correctly delimited and the headings render properly.</details> </blockquote></details> <details> <summary>dixhttp/README_zh.md (1)</summary><blockquote> `386-395`: _⚠️ Potential issue_ | _🟡 Minor_ **Markdown syntax issue: unclosed code block (same as English README).** The JSON code block for `/api/type/{typeName}?depth=2` is not properly closed before the `/api/group-rules` section, and there's an orphaned closing triple-backtick at line 395. <details> <summary>📝 Suggested fix</summary> ```diff ] } +``` ### GET `/api/group-rules` 返回后端注册的分组清单（前端默认配置） ```json [ {"name": "service", "prefixes": ["github.com/acme/app/service"]} ] ``` -``` ``` </details> <details> <summary>🤖 Prompt for AI Agents</summary> ``` Verify each finding against the current code and only fix it if needed. In `@dixhttp/README_zh.md` around lines 386 - 395, There is an unclosed code block in README_zh.md: close the JSON fenced code block introduced in the `/api/type/{typeName}?depth=2` section so it does not bleed into the subsequent `GET /api/group-rules` section; locate the code fences around the JSON example (the triple-backtick starting the JSON block) and add the matching closing triple-backtick immediately after the JSON example, ensuring the `GET /api/group-rules` heading and its JSON example are outside that block. ``` </details> </blockquote></details> <details> <summary>dixinternal/provider.go (1)</summary><blockquote> `52-70`: _⚠️ Potential issue_ | _🟡 Minor_ **Consider bilingual or English-only hint message.** The `hint` field on line 69 is in Chinese only. For international users, this may not be helpful. Consider providing an English version or bilingual message. <details> <summary>📝 Suggested fix</summary> ```diff - "hint", "provider 内部发生 panic：建议在 provider 内捕获异常并返回 error；可临时开启 debug 日志查看堆栈") + "hint", "provider panicked: catch exceptions inside provider and return error; enable debug logging for stack trace") ``` </details> <details> <summary>🤖 Prompt for AI Agents</summary> ``` Verify each finding against the current code and only fix it if needed. In `@dixinternal/provider.go` around lines 52 - 70, The panic handler's logger.Error call currently uses a Chinese-only hint string; change it to a bilingual (Chinese + English) or English-only message and wire that into the existing logger call: update the hint value in the defer recover block (the anonymous func that calls maybePrintStack and sets err), e.g., replace the Chinese-only literal passed as the "hint" field with a new variable or literal containing both languages (or English), ensuring you preserve surrounding fields (error, error_type from buildErrorType, fn_name via GetFnName(n.fn), fn_type, input_data, etc.) so the log entry remains structured and only the hint text is internationalized. ``` </details> </blockquote></details> </blockquote></details>🧹 Nitpick comments (4)
dixinternal/option.go (1)
34-45: Clarification:Mergevs direct option application.The
Mergemethod's> 0guard is intentional - it prevents merging zero values from overwriting existing non-zero values. However, sincenewDixapplies options directly via theOptionfunction type (not throughMerge),WithProviderTimeout(0)correctly disables timeout by directly settingopts.ProviderTimeout = 0after defaults are applied.This design is correct but subtle. Consider adding a comment to
Mergeexplaining when it's used vs direct option application.🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@dixinternal/option.go` around lines 34 - 45, The Merge method on Options uses >0 guards to avoid overwriting existing non-zero values, which is intentional and different from the direct Option application used by constructors like newDix where Option functions (e.g., WithProviderTimeout) set fields directly (so WithProviderTimeout(0) can disable timeouts after defaults are applied); add a concise comment above func (o Options) Merge(opt Options) explaining this distinction: state that Merge preserves existing non-zero values and is used for merging two Options structs, whereas Option functions passed to newDix apply directly and may intentionally set zero values, with references to Merge, Options, newDix, and WithProviderTimeout for clarity.dixtrace/trace_test.go (1)
144-160: Consider verifying truncated content is valid JSONL.The test confirms the seed content is removed but doesn't verify the written event is valid JSON. This could miss encoding issues in FileSink.
💡 Optional: Add content format verification
if strings.Contains(string(b), "seed\n") { t.Fatalf("expected existing content to be truncated, got: %q", string(b)) } + if !strings.Contains(string(b), `"event":"span.start"`) { + t.Fatalf("expected valid JSON event, got: %q", string(b)) + }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@dixtrace/trace_test.go` around lines 144 - 160, Update TestFileSinkAlwaysTruncatesExistingFile to not only assert the seed content was removed but also validate that the new file contains valid JSONL for the written event: after reading the file (using the existing os.ReadFile result), split into lines and unmarshal the first non-empty line into the Event struct (from the diff) and assert fields like ID==1, OccurredAt==1 and Event=="span.start"; this ensures NewFileSink/FileSink output is valid JSONL and guards against encoding issues.dixinternal/diag_file.go (2)
29-58: Consider consolidating duplicate struct definitions.
diagFileRecordandDiagFileRecordare identical except for visibility. Consider using a single exported type or embedding to reduce duplication.🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@dixinternal/diag_file.go` around lines 29 - 58, The two structs diagFileRecord and DiagFileRecord are identical; remove the duplicate by keeping a single canonical definition (prefer keeping the exported DiagFileRecord) and replace the other with a type alias (e.g., add "type diagFileRecord = DiagFileRecord") so callers within the package can still use the unexported name; update any references to the removed struct name to use the alias or the exported type and ensure JSON tags remain unchanged.
345-425: Memory concern: Entire file loaded before filtering.
ReadDiagFileRecordsreads all matching records into memory before sorting and paginating. For large diagnostic files, this could cause memory pressure. Consider streaming/early-termination optimizations for production use.💡 Consider adding a hard cap or streaming approach
For now, you could add a pre-filter cap to limit memory usage:
lineNo := 0 all := make([]DiagFileRecord, 0, 256) + const maxRecordsToLoad = 50000 // Hard cap to prevent OOM for scanner.Scan() { + if len(all) >= maxRecordsToLoad { + break + } lineNo++This is a tradeoff - it may miss older records, but prevents unbounded memory growth.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@dixinternal/diag_file.go` around lines 345 - 425, The current implementation accumulates all matching records in the slice all before sorting/paginating which can OOM on large files; change ReadDiagFileRecords to stream and keep only up to limit matching records using a min-heap (priority queue) keyed by OccurredAt (and RecordID as tiebreaker) so you maintain the top-N most recent records without storing everything. Concretely: in the scanner loop increment a match counter for result.Total, push each matching rec into a fixed-size min-heap (use a small struct comparator based on rec.OccurredAt then RecordID), and if heap size > limit pop the smallest; after scanning drain heap into a slice, sort that slice descending (same comparator used today), set result.Records, result.Returned, and result.NextBefore from the last returned RecordID; keep error handling and normalizeDiagRecordID/diagRecordMatchesQuery calls as-is and use defaultDiagReadLimit(query.Limit) for heap capacity.🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed. Inline comments: In `@dixinternal/api.go`: - Around line 255-305: GetProviderRuntimeStats (and similarly GetRecentErrors) reads dix.providerStats and dix.recentErrors concurrently while recordProviderStat and recordRecentErrorWithContext mutate them; snapshot these structures under a Dix RWMutex to avoid concurrent map/slice panics and torn snapshots: add an RWMutex field to Dix (e.g., statsMu), acquire a read lock in GetProviderRuntimeStats, copy dix.providerStats (map) and any slices you iterate (and recentErrors in GetRecentErrors) into local variables while holding the lock, release the lock and then build/sort the ProviderRuntimeStats from the local copies; ensure recordProviderStat and recordRecentErrorWithContext use the same mutex for writes (write lock) when mutating providerStats/recentErrors. In `@dixinternal/dix.go`: - Around line 412-423: The provider runtime stat is using the expanded registration type (p.output.typ) which can differ from the function's declared return type; update the stat creation in the block that sets dix.providerStats[p.fn] to use the function's declared return type obtained from p.fn.Type().Out(0).String() for OutputType instead of p.output.typ.String(), keeping other fields (FunctionName via GetFnName(p.fn) and map insertion) unchanged so providerRuntimeStat reflects the original function signature. In `@dixinternal/provider.go`: - Around line 76-97: The timeout implementation in providerFn.callWithTimeout currently leaves the goroutine running after the caller unblocks, so document this behavior and recommend cooperative cancellation: update the WithProviderTimeout option's documentation (and any public docs for provider timeouts) to state that timeouts only unblock the caller and do not cancel or stop the provider goroutine, that side effects and resource usage may continue, and advise implementers to accept a context or implement their own cancellation-aware logic; also add a note suggesting a future enhancement to add a context parameter to provider functions for cooperative cancellation (reference providerFn.callWithTimeout and the WithProviderTimeout option in your docs). In `@dixtrace/trace.go`: - Around line 331-337: The directory and file creation in the trace persistence code use world-readable perms; update the mkdir and file permissions to be private and enforce them after creation: when creating the dir for f.path, use 0700 instead of 0755 (MkdirAll), open the file with flags as before but use 0600 instead of 0644, and immediately call Chmod(0o600) on the returned fd (or the created path) to ensure permissions apply regardless of umask; apply the same change pattern used around f.path/OpenFile/Chmod in dixtrace/trace.go and mirror it in dixinternal/diag_file.go for the Event persistence logic. --- Outside diff comments: In `@dixhttp/README_zh.md`: - Around line 386-395: There is an unclosed code block in README_zh.md: close the JSON fenced code block introduced in the `/api/type/{typeName}?depth=2` section so it does not bleed into the subsequent `GET /api/group-rules` section; locate the code fences around the JSON example (the triple-backtick starting the JSON block) and add the matching closing triple-backtick immediately after the JSON example, ensuring the `GET /api/group-rules` heading and its JSON example are outside that block. In `@dixhttp/README.md`: - Around line 405-414: The README has an unclosed JSON code block for the GET `/api/type/{typeName}?depth=2` section and an orphaned triple-backtick before the `### GET /api/group-rules` heading; close the earlier JSON block properly (add the missing ```json block terminator) and remove the extra standalone ``` that follows the `### GET /api/group-rules` section so both code blocks are correctly delimited and the headings render properly. In `@dixinternal/provider.go`: - Around line 52-70: The panic handler's logger.Error call currently uses a Chinese-only hint string; change it to a bilingual (Chinese + English) or English-only message and wire that into the existing logger call: update the hint value in the defer recover block (the anonymous func that calls maybePrintStack and sets err), e.g., replace the Chinese-only literal passed as the "hint" field with a new variable or literal containing both languages (or English), ensuring you preserve surrounding fields (error, error_type from buildErrorType, fn_name via GetFnName(n.fn), fn_type, input_data, etc.) so the log entry remains structured and only the hint text is internationalized. --- Nitpick comments: In `@dixinternal/diag_file.go`: - Around line 29-58: The two structs diagFileRecord and DiagFileRecord are identical; remove the duplicate by keeping a single canonical definition (prefer keeping the exported DiagFileRecord) and replace the other with a type alias (e.g., add "type diagFileRecord = DiagFileRecord") so callers within the package can still use the unexported name; update any references to the removed struct name to use the alias or the exported type and ensure JSON tags remain unchanged. - Around line 345-425: The current implementation accumulates all matching records in the slice all before sorting/paginating which can OOM on large files; change ReadDiagFileRecords to stream and keep only up to limit matching records using a min-heap (priority queue) keyed by OccurredAt (and RecordID as tiebreaker) so you maintain the top-N most recent records without storing everything. Concretely: in the scanner loop increment a match counter for result.Total, push each matching rec into a fixed-size min-heap (use a small struct comparator based on rec.OccurredAt then RecordID), and if heap size > limit pop the smallest; after scanning drain heap into a slice, sort that slice descending (same comparator used today), set result.Records, result.Returned, and result.NextBefore from the last returned RecordID; keep error handling and normalizeDiagRecordID/diagRecordMatchesQuery calls as-is and use defaultDiagReadLimit(query.Limit) for heap capacity. In `@dixinternal/option.go`: - Around line 34-45: The Merge method on Options uses >0 guards to avoid overwriting existing non-zero values, which is intentional and different from the direct Option application used by constructors like newDix where Option functions (e.g., WithProviderTimeout) set fields directly (so WithProviderTimeout(0) can disable timeouts after defaults are applied); add a concise comment above func (o Options) Merge(opt Options) explaining this distinction: state that Merge preserves existing non-zero values and is used for merging two Options structs, whereas Option functions passed to newDix apply directly and may intentionally set zero values, with references to Merge, Options, newDix, and WithProviderTimeout for clarity. In `@dixtrace/trace_test.go`: - Around line 144-160: Update TestFileSinkAlwaysTruncatesExistingFile to not only assert the seed content was removed but also validate that the new file contains valid JSONL for the written event: after reading the file (using the existing os.ReadFile result), split into lines and unmarshal the first non-empty line into the Event struct (from the diff) and assert fields like ID==1, OccurredAt==1 and Event=="span.start"; this ensures NewFileSink/FileSink output is valid JSONL and guards against encoding issues.
ℹ️ Review info
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Configuration used: defaults
Review profile: CHILL
Plan: Pro
Run ID:
091174f1-f87a-40fb-bc02-08a187a18249📒 Files selected for processing (23)
.gitignoreREADME.mdREADME_zh.mddix.godixhttp/README.mddixhttp/README_zh.mddixhttp/server.godixhttp/server_runtime_test.godixhttp/template.htmldixinternal/api.godixinternal/diag_file.godixinternal/diag_file_query_test.godixinternal/dix.godixinternal/dix_test.godixinternal/logger.godixinternal/logger_test.godixinternal/option.godixinternal/provider.godixinternal/trace_chain_test.godixinternal/util.godixtrace/trace.godixtrace/trace_test.goexample/http/main.go
| func (dix *Dix) GetProviderRuntimeStats() []ProviderRuntimeStats { | ||
| stats := make([]ProviderRuntimeStats, 0, len(dix.providers)) | ||
| seen := make(map[reflect.Value]bool) | ||
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| for _, providerList := range dix.providers { | ||
| for _, p := range providerList { | ||
| if p == nil || seen[p.fn] { | ||
| continue | ||
| } | ||
| seen[p.fn] = true | ||
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| outputType := "" | ||
| if p.output != nil && p.output.typ != nil { | ||
| outputType = p.output.typ.String() | ||
| } | ||
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| item := ProviderRuntimeStats{ | ||
| FunctionName: GetFnName(p.fn), | ||
| OutputType: outputType, | ||
| } | ||
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| if s, ok := dix.providerStats[p.fn]; ok && s != nil { | ||
| avg := time.Duration(0) | ||
| if s.CallCount > 0 { | ||
| avg = s.TotalDuration / time.Duration(s.CallCount) | ||
| } | ||
| item.FunctionName = s.FunctionName | ||
| if s.OutputType != "" { | ||
| item.OutputType = s.OutputType | ||
| } | ||
| item.CallCount = s.CallCount | ||
| item.TotalDuration = s.TotalDuration | ||
| item.AverageDuration = avg | ||
| item.LastDuration = s.LastDuration | ||
| item.LastError = s.LastError | ||
| item.LastRunAtUnixNano = s.LastRunAt.UnixNano() | ||
| } | ||
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| stats = append(stats, item) | ||
| } | ||
| } | ||
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| sort.Slice(stats, func(i, j int) bool { | ||
| if stats[i].TotalDuration == stats[j].TotalDuration { | ||
| return stats[i].FunctionName < stats[j].FunctionName | ||
| } | ||
| return stats[i].TotalDuration > stats[j].TotalDuration | ||
| }) | ||
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| return stats | ||
| } |
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🧩 Analysis chain
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# First, let's examine the Dix struct definition and understand its current fields
fd "dix.go" dixinternal/ --exec head -100 {}Repository: pubgo/dix
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# Search for the Dix struct definition to see if there's already a mutex
rg "type Dix struct" -A 30 dixinternal/Repository: pubgo/dix
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# Look at the second getter around lines 309-342
sed -n '309,342p' dixinternal/api.goRepository: pubgo/dix
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# Search for recordProviderStat and recordRecentErrorWithContext implementations
rg "func.*recordProviderStat|func.*recordRecentErrorWithContext" -A 10 dixinternal/Repository: pubgo/dix
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# Search for HTTP endpoint handlers for /api/runtime-stats and /api/errors
rg "runtime-stats|/api/errors" -r dixinternal/Repository: pubgo/dix
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# Get the full implementation of recordProviderStat
rg "func \(dix \*Dix\) recordProviderStat" -A 30 dixinternal/Repository: pubgo/dix
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# Get the full implementation of recordRecentErrorWithContext
rg "func \(dix \*Dix\) recordRecentErrorWithContext" -A 40 dixinternal/Repository: pubgo/dix
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rg "HandleRuntimeStats|HandleErrors" -A 15 dixhttp/Repository: pubgo/dix
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# Search for where recordProviderStat is called to see if there's any locking context
rg "recordProviderStat" dixinternal/ -B 3 -A 1Repository: pubgo/dix
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Snapshot diagnostics under a lock before serving them.
GetProviderRuntimeStats() and GetRecentErrors() read from dix.providerStats and dix.recentErrors while recordProviderStat() and recordRecentErrorWithContext() mutate them on every provider execution and injection failure. With HTTP handlers calling these getters concurrently, concurrent map reads and slice appends can trigger Go's concurrent map/slice panic or return torn snapshots. Add an RWMutex on Dix and copy both structures under the read lock before building the response.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@dixinternal/api.go` around lines 255 - 305, GetProviderRuntimeStats (and
similarly GetRecentErrors) reads dix.providerStats and dix.recentErrors
concurrently while recordProviderStat and recordRecentErrorWithContext mutate
them; snapshot these structures under a Dix RWMutex to avoid concurrent
map/slice panics and torn snapshots: add an RWMutex field to Dix (e.g.,
statsMu), acquire a read lock in GetProviderRuntimeStats, copy dix.providerStats
(map) and any slices you iterate (and recentErrors in GetRecentErrors) into
local variables while holding the lock, release the lock and then build/sort the
ProviderRuntimeStats from the local copies; ensure recordProviderStat and
recordRecentErrorWithContext use the same mutex for writes (write lock) when
mutating providerStats/recentErrors.
| stat, ok := dix.providerStats[p.fn] | ||
| if !ok { | ||
| outputType := "" | ||
| if p.output != nil && p.output.typ != nil { | ||
| outputType = p.output.typ.String() | ||
| } | ||
| stat = &providerRuntimeStat{ | ||
| FunctionName: GetFnName(p.fn), | ||
| OutputType: outputType, | ||
| } | ||
| dix.providerStats[p.fn] = stat | ||
| } |
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rg "type.*Provider" dixinternal/ -A 5 | head -100Repository: pubgo/dix
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Use the provider's declared return type, not the expanded lookup type.
p.output.typ is the expanded type after registration (element type for slices/maps, field type for structs), not the declared return type. This causes runtime stats to report misleading output types. Use p.fn.Type().Out(0).String() to capture the actual function signature.
Minimal fix for the recorded stat
if !ok {
outputType := ""
- if p.output != nil && p.output.typ != nil {
- outputType = p.output.typ.String()
+ if p.fn.IsValid() && p.fn.Type().NumOut() > 0 {
+ outputType = p.fn.Type().Out(0).String()
}
stat = &providerRuntimeStat{
FunctionName: GetFnName(p.fn),
OutputType: outputType,
}🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@dixinternal/dix.go` around lines 412 - 423, The provider runtime stat is
using the expanded registration type (p.output.typ) which can differ from the
function's declared return type; update the stat creation in the block that sets
dix.providerStats[p.fn] to use the function's declared return type obtained from
p.fn.Type().Out(0).String() for OutputType instead of p.output.typ.String(),
keeping other fields (FunctionName via GetFnName(p.fn) and map insertion)
unchanged so providerRuntimeStat reflects the original function signature.
| func (n providerFn) callWithTimeout(in []reflect.Value, timeout time.Duration) (outputs []reflect.Value, err error, timedOut bool) { | ||
| if timeout <= 0 { | ||
| outputs, err = n.call(in) | ||
| return outputs, err, false | ||
| } | ||
|
|
||
| resultCh := make(chan providerCallResult, 1) | ||
| go func() { | ||
| outputs, callErr := n.call(in) | ||
| resultCh <- providerCallResult{outputs: outputs, err: callErr} | ||
| }() | ||
|
|
||
| timer := time.NewTimer(timeout) | ||
| defer timer.Stop() | ||
|
|
||
| select { | ||
| case res := <-resultCh: | ||
| return res.outputs, res.err, false | ||
| case <-timer.C: | ||
| return nil, fmt.Errorf("provider execution timeout after %s", timeout), true | ||
| } | ||
| } |
There was a problem hiding this comment.
Provider goroutine continues after timeout - document this behavior.
When a timeout occurs, the goroutine running n.call(in) continues executing in the background. The result is discarded via the buffered channel, but:
- The provider may still complete side effects (DB writes, API calls, etc.)
- Resources held by the provider won't be released until it completes
- Multiple timeouts can accumulate background goroutines
This is a fundamental Go limitation (no goroutine preemption), but users should be aware that timeout doesn't cancel the provider - it only unblocks the caller.
Consider documenting this behavior in the WithProviderTimeout option or adding a context parameter to providers for cooperative cancellation in the future.
Would you like me to draft documentation text explaining this timeout behavior, or open an issue to track adding context-based cancellation support?
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@dixinternal/provider.go` around lines 76 - 97, The timeout implementation in
providerFn.callWithTimeout currently leaves the goroutine running after the
caller unblocks, so document this behavior and recommend cooperative
cancellation: update the WithProviderTimeout option's documentation (and any
public docs for provider timeouts) to state that timeouts only unblock the
caller and do not cancel or stop the provider goroutine, that side effects and
resource usage may continue, and advise implementers to accept a context or
implement their own cancellation-aware logic; also add a note suggesting a
future enhancement to add a context parameter to provider functions for
cooperative cancellation (reference providerFn.callWithTimeout and the
WithProviderTimeout option in your docs).
| dir := filepath.Dir(f.path) | ||
| if dir != "." && dir != "" { | ||
| _ = os.MkdirAll(dir, 0o755) | ||
| } | ||
| fd, err := os.OpenFile(f.path, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o644) | ||
| if err != nil { | ||
| return nil |
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Use private file permissions for persisted trace data.
The Event struct includes Message, Error, and arbitrary Attrs, making these files sensitive. Creating directories as 0755 and files as 0644 allows other local users to read diagnostics on shared systems. Change to 0700 for directories and 0600 for files. Call Chmod(0o600) after OpenFile to ensure permissions apply regardless of umask.
Suggested fix
dir := filepath.Dir(f.path)
if dir != "." && dir != "" {
- _ = os.MkdirAll(dir, 0o755)
+ _ = os.MkdirAll(dir, 0o700)
}
- fd, err := os.OpenFile(f.path, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o644)
+ fd, err := os.OpenFile(f.path, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o600)
if err != nil {
return nil
}
+ _ = fd.Chmod(0o600)
f.f = fd
return f.fNote: Similar permission issue exists in dixinternal/diag_file.go.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@dixtrace/trace.go` around lines 331 - 337, The directory and file creation in
the trace persistence code use world-readable perms; update the mkdir and file
permissions to be private and enforce them after creation: when creating the dir
for f.path, use 0700 instead of 0755 (MkdirAll), open the file with flags as
before but use 0600 instead of 0644, and immediately call Chmod(0o600) on the
returned fd (or the created path) to ensure permissions apply regardless of
umask; apply the same change pattern used around f.path/OpenFile/Chmod in
dixtrace/trace.go and mirror it in dixinternal/diag_file.go for the Event
persistence logic.
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