Phase Listener buries exceptions

Question

This is a JSF question sort of...
Can anybody hazard a guess why my JSF Phase Listener does not show exceptions when one gets thrown in a method within this PhaseListener?
I am using ADF/BC and JSF/ADF Faces within JDeveloper 10.1.3.4 and deploying to iAS 10.1.3.4.
I have not tried the same thing in an ADFPhaseListener...chiefly because I wanted a beforePhase() and an afterPhase() method to override, and Source-->Override Methods did not show these methods as being overrideable...so I just used the normal JSF Phase Listener.
My theory is that PhaseListener is perhaps accessed by many sessions?? So it has no way to know to where its stack traces should be directed. So I guess I should use logging with some sort of general catch clause for each method...any ideas will be entertained.
Thanks in advance.

Answer 1

Here's exactly what it says:
The beforePhase() method is called before the standard processing for a particular phase is
performed, while the afterPhase() method is called after the standard processing has been
completed. The JSF implementation must guarantee that, if beforePhase() has been
called on a particular instance, then afterPhase() will also be called, regardless of any
Exceptions that may have been thrown during the actual execution of the lifecycle phase. For
example, let’s say there are three PhaseListeners attached to the lifecycle: A, B, and C, in
that order. A.beforePhase() is called, and executes successfully. B.beforePhase()
is called and throws an exception. Any exceptions thrown during the beforePhase()
listeners must be caught, logged, and swallowed. In this example, C.beforePhase()
must not be called. Then the actual lifecycle phase executes. Any exceptions thrown during
the execution of the actual phase must not be swallowed. When the lifecycle phase exits, due
to an exeception or normal termination, the afterPhase() listeners must be called in
reverse order from the beforePhase() listeners in the following manner.
C.afterPhase() must not be called, since C.beforePhase() was not called.
B.afterPhase() must not be called, since B.beforePhase() did not execute
successfully. A.afterPhase() must be called. Any exceptions thrown during the afterPhase()
listeners must be caught, logged, and swallowedJohn