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Struts & Hibernate
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| | | - process-state exception handling | - process-state exception handling 2007-07-16 - By kevin.l.wilson
Back
I am trying to write a exception handler for a process state node. The sub
processes may throw a variety of exceptions. These exceptions need to be caught
when the subprocess is wrapped by another higherlevel process. The higherlevel
process we have the process-state node defined as:
<process-state name="Process Target">
| <sub-process name="subProcess"></sub-process>
| <transition name="" to="updateStatus"></transition>
| <exception-handler>
| <action class="....StatusDetailExceptionHandler"></action>
| </exception-handler>
| </process-state>
However, when we try to test this in the debugger, the exception is first
caught by the Node calling the action. It then tries to raise the exception,
and ends up delegating to the subprocess definition, which throws a
DelegatedException().
Since the ProcessState.enter() does not wrap with a Catch, the exception is
never processed by this node this the exception goes up the stack to the
previous Node, and its exception handler does get called.
Potentially handling the exception in the incorrect way.
The work around I came up with is to define a node previous to the process
state to define the exception handling for process state. And a exception
transistion taken by the handler.
<node name="handleException">
| <transition name="" to="subProcess"></transition>
| <transition name="exception" to="updateStatus"><
/transition>
| <exception-handler>
| <action class="....StatusDetailExceptionHandler"></action>
| </exception-handler>
| </node>
| <process-state name="Process Target">
| <sub-process name="subProcess"></sub-process>
| <transition name="" to="updateStatus"></transition>
| <exception-handler>
| <action class="....StatusDetailExceptionHandler"></action>
| </exception-handler>
| </process-state>
Is there any better workaround?
Kevin
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic
&p=4064806#4064806
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