Thank you for your reply and it sure does help me, I'm going to try it out.
Although I was looking to see if there is a way to do it through Guvnor and that is basically my question. Is it possible to do it?
We currently do not retrieve java classes from guvnor. So you'll have to make sure you put the implementation classes on the server classpath (like server/default/lib).
One last question Do you see this happenning in the future or is it something that is not in the roadmap?