A call for
comments on the possible call back mechanism for the new simpler EJB3 spec.
Personally, I have no problem with the current Interface-defined (current
2.x spec) call backs. I always keep a few abstract base classes
providing the implementation of the call-back methods. I have empty
implementations, event-based implementations with notification capabilities
to subscribers (I use this for clean purposes with anonymous classes).
As for my comment: I would like a number of abstract implementations of the
call-back interfaces. So, I suggent a combination of option 2 and 3.
