JRUBY ON RAILS ON GOOGLE APP ENGINE

GoogleAppEngineがJAVAに対応した、というニュースが流れましたが更にはJruby経由でJRuby on Railsの稼働が確認できたらしいです。
これはJRuby祭りが始まるかも!

http://olabini.com/blog/2009/04/jruby-on-rails-on-google-app-engine/

JRUBY ON RAILS ON GOOGLE APP ENGINE

This is the third post in a series detailing information about the newly announced Google App Engine support for Java. In this post I thought I’d go through the steps you need to take to get a JRuby on Rails application working on GAE/J, and also what kind of characteristics you should expect from your application.

You need a fairly new copy of JRuby. Most of the changes needed to JRuby was added to JRuby trunk right after the JRuby 1.2 release, so check out and build something after that. The newest Rails version works fine too.