Java EE (Java Enterprise Edition) General Discussion

hi -

In one of the project designs that I was studying, the message facade pattern is used heavily. That is each request is submitted on to a JMS queue to which a MDB is attached. This is quiet in synch with the Message Facade pattern. But here the servlet is made to wait for the response until MDB finishes processing, i.e., the request which is actually synchronous is processed by asynchronous means but finally making it look like synchronous.

So I want to know how far this design is better as compared to traditional Session Facade in the given scenario of
synchronous requests ? I thought Message Facade pattern is useful only when the requests can be asynchronously processed. Isn't it ?

TIA
-Nikhil.