JavaSessionStore in Rails 3

[<andrew.avenoso@nearinfinity.com>]

I am trying to get the JavaSessionStore working in my JRuby on Rails 3
app.
I had it working with Rails 2 and wrote this blog post about it.
http://www.nearinfinity.com/blogs/andrew_avenoso/session_storage_in_jru
by_on_ra.html

I have been unable to figure out how to get it working with Rails 3
though

I am using jruby-rack 1.0.3
warbler 1.2.1
rails 3.0.0
jruby 1.5.2

I tried a few things
MyApp::Application.config.session_store = :java_servlet_store
This did nothing, it was still a cookie store

require 'action_controller/session/java_servlet_store'
causes a no such file to load error

require 'jruby-rack'
require JRubyJars.jruby_rack_jar_path
require 'action_controller/session/java_servlet_store'
causes an uninitialized constant
ActionController::Session::JavaServletStore::AbstractStore


I'm not sure if this is a bug in jruby-rack, or if I just don't know
the proper way to setup the JavaServletStore.

Help please,
Andrew