Add delayed enqueue

.travis.yml

@@ -2,6 +2,6 @@ language: ruby
 before_install:
   - gem install nokogiri -- --with-cflags='--std=gnu99'
 rvm:
-  - 1.9.3
   - 2.0.0
+  - 2.1
   - ruby-head

lib/sunspot/queue/configuration.rb

@@ -1,5 +1,9 @@
 module Sunspot::Queue
   class Configuration
-    attr_accessor :index_job, :removal_job
+    attr_accessor :index_job, :removal_job, :delay_for
+
+    def initialize
+      @delay_for = 5.seconds # default `delay_for` is 5 seconds
+    end
   end
 end

lib/sunspot/queue/delayed_job/backend.rb

@@ -11,7 +11,7 @@ def initialize(configuration = Sunspot::Queue.configuration)
     end
 
     def enqueue(job)
-      Delayed::Job.enqueue(job)
+      Delayed::Job.enqueue(job, run_at: @configuration.delay_for.from_now)
     end
 
     def index(klass, id)

lib/sunspot/queue/sidekiq.rb

@@ -1,3 +1,4 @@
+require "sidekiq"
 require "sunspot/queue"
 
 module Sunspot::Queue

lib/sunspot/queue/sidekiq/backend.rb

@@ -11,7 +11,7 @@ def initialize(configuration = Sunspot::Queue.configuration)
 
     # Job needs to include Sidekiq::Worker
     def enqueue(job, klass, id)
-      job.perform_async(klass.to_s, id)
+      job.perform_in(@configuration.delay_for, klass.to_s, id)
     end
 
     def index(klass, id)

spec/spec_helper.rb

@@ -41,6 +41,12 @@ class Person < ActiveRecord::Base
   end
 end
 
+class Rails
+  def self.version
+    '4'
+  end
+end
+
 RSpec.configure do |config|
   config.treat_symbols_as_metadata_keys_with_true_values = true
   config.run_all_when_everything_filtered = true