@taichi will work on JRuby support for Cool.io.
Here's how nio4r handles JRuby, if it's any help:
@tarcieri Thanks for the link!
@taichi Please check nio4r when you start to implement. It is very helpful :)
@tarcieri thanks for your help. I'll check it.
@taichi something you might consider as a path to JRuby support is rewriting the core of cool.io to use nio4r. I would be happy to add features upstream to nio4r in order to support this effort.
Cool, though never use JRuby, But I like this spirit of cooperation.