Delay to post feed to facebook with Delayed::Job

Gemfile

@@ -30,6 +30,7 @@ gem 'json' # used rest-graph
 gem "amazon-ecs"
 gem "carrierwave"
 gem "fog"
+gem "delayed_job"
 
 # Bundle gems for the local environment. Make sure to
 # put test-only gems in this group so their generators

Gemfile.lock

@@ -42,6 +42,10 @@ GEM
     carrierwave (0.5.3)
       activesupport (~> 3.0)
     columnize (0.3.2)
+    daemons (1.1.3)
+    delayed_job (2.1.4)
+      activesupport (~> 3.0)
+      daemons
     diff-lcs (1.1.2)
     erubis (2.6.6)
       abstract (>= 1.0.0)
@@ -137,6 +141,7 @@ PLATFORMS
 DEPENDENCIES
   amazon-ecs
   carrierwave
+  delayed_job
   fog
   haml
   haml-rails

app/controllers/mangas_controller.rb

@@ -17,7 +17,7 @@ def create
     end
     begin
       @manga.save!
-      @manga.post_link_to_facebook
+      @manga.delay.post_link_to_facebook
       redirect_to mangas_url, :notice => "Successfully created manga."
     rescue ActiveRecord::RecordInvalid => e
       redirect_to new_manga_path(:query => params[:query]), :notice => @manga.errors.full_messages

config/initializers/delaeyd_job_config.rb

@@ -0,0 +1 @@
+Delayed::Worker.delay_jobs = !(Rails.env.development? or Rails.env.test?)

db/migrate/20110425102025_create_delayed_jobs.rb

@@ -0,0 +1,21 @@
+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.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

@@ -10,7 +10,22 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20110418163704) do
+ActiveRecord::Schema.define(:version => 20110425102025) do
+
+  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.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  add_index "delayed_jobs", ["priority", "run_at"], :name => "delayed_jobs_priority"
 
   create_table "mangas", :force => true do |t|
     t.string   "title"

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