Adds delayed jobs for long task process

Gemfile

@@ -59,6 +59,7 @@ gem 'bcrypt', '~> 3.1.7'
 # Use Capistrano for deployment
 # gem 'capistrano', group: :development
 gem 'kaminari'
+gem 'delayed_job_active_record', '~> 4.1'
 
 # Use debugger
 gem 'byebug', group: [:development, :test]

Gemfile.lock

@@ -56,6 +56,11 @@ GEM
     compass-rails (1.1.7)
       compass (>= 0.12.2)
       sprockets (<= 2.11.0)
+    delayed_job (4.1.1)
+      activesupport (>= 3.0, < 5.0)
+    delayed_job_active_record (4.1.0)
+      activerecord (>= 3.0, < 5)
+      delayed_job (>= 3.0, < 5)
     devise (3.5.2)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -189,6 +194,7 @@ DEPENDENCIES
   byebug
   coffee-rails (~> 4.0.0)
   compass-rails (= 1.1.7)
+  delayed_job_active_record (~> 4.1)
   devise
   email_spec
   factory_girl_rails

app/controllers/api/v1/orders_controller.rb

@@ -17,8 +17,8 @@ def create
       params[:order][:product_ids_and_quantities])
 
     if order.save
-      order.reload
-      OrderMailer.send_confirmation(order).deliver
+      order.reload #we reload the object so the response displays the product objects
+      OrderMailer.delay.send_confirmation(order)
       render json: order, status: 201, location: [:api, current_user, order]
     else
       render json: { errors: order.errors }, status: 422

bin/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

config/environments/development.rb

@@ -14,7 +14,7 @@
   config.action_controller.perform_caching = false
 
   # Don't care if the mailer can't send.
-  config.action_mailer.raise_delivery_errors = false
+  config.action_mailer.raise_delivery_errors = true
 
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
@@ -26,4 +26,9 @@
   # This option may cause significant delays in view rendering with a large
   # number of complex assets.
   config.assets.debug = true
+
+  config.action_mailer.delivery_method = :smtp
+  config.action_mailer.smtp_settings = { :address => "localhost", :port => 1025 }
+  config.action_mailer.default_url_options = { :host => "localhost",
+                                               only_path: false }
 end

db/migrate/20151227015440_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, null: false # Allows some jobs to jump to the front of the queue
+      table.integer :attempts, default: 0, null: false # Provides for retries, but still fail eventually.
+      table.text :handler,                 null: false # 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 null: true
+    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 +11,23 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20151226042740) do
+ActiveRecord::Schema.define(version: 20151227015440) do
+
+  create_table "delayed_jobs", force: true do |t|
+    t.integer  "priority",   default: 0, null: false
+    t.integer  "attempts",   default: 0, null: false
+    t.text     "handler",                null: false
+    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 "orders", force: true do |t|
     t.integer  "user_id"