Added delayed_job as new background queue manager.

Gemfile

@@ -18,6 +18,8 @@ gem 'meta_search'
 gem 'inherited_resources'
 gem 'localize_input', :git => "git://github.com/bennibu/localize_input.git"
 gem 'wikicloth'
+gem 'daemons'
+gem 'delayed_job_active_record'
 
 group :production do
   gem 'exception_notification', :require => 'exception_notifier'

Gemfile.lock

@@ -38,6 +38,12 @@ GEM
     builder (2.1.2)
     client_side_validations (3.0.4)
       activesupport (~> 3.0.0)
+    daemons (1.1.9)
+    delayed_job (3.0.3)
+      activesupport (~> 3.0)
+    delayed_job_active_record (0.3.2)
+      activerecord (> 2.1.0)
+      delayed_job (~> 3.0.0)
     erubis (2.6.6)
       abstract (>= 1.0.0)
     exception_notification (2.4.0)
@@ -122,6 +128,8 @@ PLATFORMS
 
 DEPENDENCIES
   client_side_validations
+  daemons
+  delayed_job_active_record
   exception_notification
   fastercsv
   haml

config/initializers/delayed_job_config.rb

@@ -0,0 +1,2 @@
+Delayed::Worker.max_attempts = 5
+Delayed::Worker.delay_jobs = !Rails.env.test?

db/migrate/20120824114234_create_delayed_jobs.rb

@@ -0,0 +1,22 @@
+class CreateDelayedJobs < ActiveRecord::Migration
+  def self.up
+    create_table :delayed_jobs, :force => true do |table|
+      table.integer  :priority, :default => 0      # Allows some jobs to jump to the front of the queue
+      table.integer  :attempts, :default => 0      # Provides for retries, but still fail eventually.
+      table.text     :handler                      # YAML-encoded string of the object that will do work
+      table.text     :last_error                   # reason for last failure (See Note below)
+      table.datetime :run_at                       # When to run. Could be Time.zone.now for immediately, or sometime in the future.
+      table.datetime :locked_at                    # Set when a client is working on this object
+      table.datetime :failed_at                    # Set when all retries have failed (actually, by default, the record is deleted instead)
+      table.string   :locked_by                    # Who is working on this object (if locked)
+      table.string   :queue                        # The name of the queue this job is in
+      table.timestamps
+    end
+
+    add_index :delayed_jobs, [:priority, :run_at], :name => 'delayed_jobs_priority'
+  end
+
+  def self.down
+    drop_table :delayed_jobs
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120622094337) do
+ActiveRecord::Schema.define(:version => 20120824114234) do
 
   create_table "article_categories", :force => true do |t|
     t.string "name",        :default => "", :null => false
@@ -78,6 +78,22 @@ ActiveRecord::Schema.define(:version => 20120622094337) do
 
   add_index "configurable_settings", ["name"], :name => "index_configurable_settings_on_name"
 
+  create_table "delayed_jobs", :force => true do |t|
+    t.integer  "priority",   :default => 0
+    t.integer  "attempts",   :default => 0
+    t.text     "handler"
+    t.text     "last_error"
+    t.datetime "run_at"
+    t.datetime "locked_at"
+    t.datetime "failed_at"
+    t.string   "locked_by"
+    t.string   "queue"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  add_index "delayed_jobs", ["priority", "run_at"], :name => "delayed_jobs_priority"
+
   create_table "deliveries", :force => true do |t|
     t.integer  "supplier_id"
     t.date     "delivered_on"

script/delayed_job

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+
+require File.expand_path(File.join(File.dirname(__FILE__), '..', 'config', 'environment'))
+require 'delayed/command'
+Delayed::Command.new(ARGV).daemonize