1. Install the Google App Engine SDK for Java. You should either add appengine-java-sdk/bin to your PATH or set the APPENGINE_JAVA_SDK environment variable to point to your installed sdk.
1. Install JRuby 1.3 or later from http://dist.codehaus.org/jruby/ . You probably want the jruby-bin.zip and jruby-complete.jar files.
2. Download jruby-rack
(Link: Getting Started with JRuby on Google App Engine – Google Code)


June 24, 2009
