HowToRunBackgroundJobsInRails--ap4r

http://ap4r.rubyforge.org/wiki/wiki.pl?GettingStarted

  

1. 1.  Business logics can be implemented as simple Web applications, or ruby code, whether it's called asynchronously or synchronously.
2.    2. Asynchronous messaging is reliable by RDBMS persistence (now MySQL only) or file persistence, under the favor of reliable-msg.
3.    3. Load balancing over multiple AP4R processes on single/multiple server(s) is supported.
4.    4. Asynchronous logics are called via various protocols, such as XML-RPC, SOAP, HTTP POST, and more.

未完待续`````````````````````

http://www.infoq.com/cn/news/2007/06/messaging-with-ap4r