I have a script with a factory method that I would like to return a different implementation of some class depending on whether or not the script is running from JRuby or Ruby. Anyone have any ideas on how I could tell the difference from inside my script?
Some initial thoughts I had were:
Attempt to 'include Java' and rescue back to the Ruby implementation if it fails. This method doesn't work. Ruby's smart enough to error out regardless of my begin/rescue/end.
Do something goofy with process IDs. I'd rather avoid this, since it always feels like a hack.
I believe you can check the RUBY_PLATFORM constant.