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RunLater ======== Simply a blatant port of Merb's run_later method, taking advantage of Rails 2.2 thread safety. Runs longer running tasks outside the current request thread, so that the request will return the content to the user without blocking. Once the request is done, the worker will run the specified block in a separate thread. It's merely a proof-of-concept for now, and my entry into the thread-safe Rails world, so I can't guarantee anything about the code. Should an error occur inside the block handed to run_later, the block will be discarded, and the worker thread will just continue its work without looking back. If you're executing important code inside the block, ensure that it does proper error handling. Testing ======= For testing you can explicitly disable threading of your blocks. Set RunLater.run_now to true in your config/environments/test.rb and your blocks will be executed within the test case for your testing pleasure. Example ======= class AccountController < ApplicationController def signup @user = User.new(params[:user]) if @user.save run_later do AccountMailer.deliver_signup(@user) end end end end Known Issues ============ When using Passenger (http://modrails.com) and you're running tasks that take a little longer you will experience a delay in development mode. This is because after each request, Rails cleans up its environment and unloads all classes. run_later will defer the cleanup until the worker thread is done or a timeout has occured (default is 10 seconds). This is true for at least Passenger 2.0.6, but not in 2.0.3 and 2.1.1, and it will also happen when using Mongrel, but not in production mode. License, Props ============== Thanks to Yehuda Katz for showing off run_later at the Merb BoF session at RailsConf Europe 2008. Ported to Rails by Mathias Meyer (http://paperplanes.de). Released under the MIT license