On Aug 5, 2008, at 5:23 AM, Karan Malhi wrote:
Question:- What would be the use-case to call an asynchronous method
and
expect synchronous behavior?
Not *an* asynchronous method (singular) but *multiple* asynchronous
methods (plural). Do methods A, B, and C in parallel and wait for
them to complete before continuing. The asynchronous methods could
each be doing a web service call, for example, that gather data needed
to start the real work.
It's essentially what you could do on your own with a CountDownLatch
but cannot do reliably as you are not in control of the threads or
even the method execution. Passing a CountDownLatch as a parameter to
the asynchronous methods you call and having the methods themselves
call latch.countDown() isn't going to work as the container can throw
exceptions before and after a bean method call. You have no easy way
of knowing if the bean method called countDown().
-David
