From 3e0fc41f63fafd322e28f603534eb971732767ff Mon Sep 17 00:00:00 2001
From: Morton Jonuschat <yabawock@gmail.com>
Date: Wed, 7 Apr 2010 22:40:03 +0200
Subject: [PATCH] Railtie to perform Rails 3 initialization

---
 lib/delayed/railtie.rb | 17 +++++++++++++++++
 lib/delayed_job.rb     |  1 +
 2 files changed, 18 insertions(+)
 create mode 100644 lib/delayed/railtie.rb

diff --git a/lib/delayed/railtie.rb b/lib/delayed/railtie.rb
new file mode 100644
index 000000000..5d6c76241
--- /dev/null
+++ b/lib/delayed/railtie.rb
@@ -0,0 +1,17 @@
+require 'delayed_job'
+require 'rails'
+
+module Delayed
+  class Railtie < Rails::Railtie
+    initializer :after_initialize do
+      Delayed::Worker.backend ||= if defined?(ActiveRecord)
+        :active_record
+      elsif defined?(MongoMapper)
+        :mongo_mapper
+      else
+        Delayed::Worker.logger.warn "Could not decide on a backend, defaulting to active_record"
+        :active_record
+      end
+    end
+  end
+end
diff --git a/lib/delayed_job.rb b/lib/delayed_job.rb
index dcd4e1a94..ef9fe0147 100644
--- a/lib/delayed_job.rb
+++ b/lib/delayed_job.rb
@@ -4,6 +4,7 @@
 require File.dirname(__FILE__) + '/delayed/performable_method'
 require File.dirname(__FILE__) + '/delayed/backend/base'
 require File.dirname(__FILE__) + '/delayed/worker'
+require File.dirname(__FILE__) + '/delayed/railtie' if defined?(::Rails::Railtie)
 
 Object.send(:include, Delayed::MessageSending)   
 Module.send(:include, Delayed::MessageSending::ClassMethods)