I\'ve been searching and can\'t find an answer anywhere. I also haven\'t had time to try it out either.
Is it possible, using java in the Google App Engine (GAE), t
I do this all the time using a REST API on the server that contains the database. Depending on your needs (eg, do you need ad-hoc queries) you may want to choose a REST API with some flexibility.
There are quite a few simple REST-DB libraries around, such as http://phprestsql.sourceforge.net/
Though you may want to simply roll your own using http://www.playframework.org/ or http://guides.rubyonrails.org/getting_started.html#rest