Anyone using JRuby-Rack with Rails 3?

Is anyone else out there running Rails 3 and JRuby-Rack, or Jetty and Rails 3? Any trick to it? I'm going insane with some debugging, and at this point I just want to know that it's possible.


These instructions work for me:

i am using jetty-rails + rails3 for a couple of projects. jetty-rails need to be fixed , require "activesupport" need to be changed to require "active_support" (for activesupport 3.0.3) and you have also do 'require "active_support/all"' to include hash extensions (otherwise symbolize! & reverse_merge method will raise exceptions.. right now trying to fix some jruby-rack issues.. (Rack::Runtime not loaded)..will update once thats done.

Need Your Help

Optimize MySQL Subquery

mysql optimization subquery

I'm rather new to MySQL and am trying to simplify this statement:

In a single SQL query how many indexes can the query use from a single table?

sql database oracle indexing

In oracle if you had a table with say 3 indexes on 3 different columns. How many of those indexes could a single SQL statement possibly use from the one table?