I have done a few projects using Ruby on Rails. I am going to use JRuby on Rails and hosting it on GAE. In that case what are the stuff that I need to know while developing JRuby apps. I read that
- JRuby has the same syntax
- I can access Java libraries
- JRuby does not have access to some gems/plugins
- JRuby app would take some time to load for the first time, so I have to keep it alive by sending request every 5 mins or so
- I cannot use ActiveRecord and instead I must DataMapper
Please correct if I am wrong about any of the statements I have made and Is there anything else that I must know?. Do I need to start reading about JRuby from the scratch or I can go about as usual developing Ruby apps?