Runtime exceptions cause transactions to role back. Checked exceptions do not.
Lawrence
Justin Casp wrote:
> Hello,
> I'm hoping somebody out there can give me a hint on how to set up transaction
> attributes for session beans that behave in the following manner.
>
> ImportantBean has a method, 'doImportantWork' which throws MajorException
> UnimportantBean has a method 'doUnimportantWork' which throws TrivialException
>
> MainBean has a method 'doWork' :
>
> doWork() throws MajorException {
> ImportantBean.doImportantWork();
> try {
> UnimportantBean.doUnimportantWork();
> } catch (TrivialException t) {
> //do something that doesn't matter much
> }
> }
>
> If ImportantBean's method throws an exception, I want the transaction to be
> rolled back. This is easy, standard behavior- no problem.
>
> I want to catch the TrivialException without causing the transaction to be
> rolled back for MainBean. Currently, when I catch TrivialException in my
> MainBean method, the TX gets rolled back.
>
> I have tried setting the transaction attributes of UnimportantBean's methods
> to both "NotSupported" and "RequiresNew", but both of these settings cause a
> transaction timeout with JBoss. The other beans' methods are set to the
> default, 'Required'.
>
> I thought that by setting the UnimportantBean to 'NotSupported', I would be
> suspending the MainBean's transaction during this code's execution. That
> way, if an exception was thrown in doUnimportantWork(), it wouldn't matter to
> MainBean. Obviously, this reasoning is wrong, but I'm not sure why. I guess
> having MainBean catch an exception as described above means the transaction
> context is re-entered/unsuspended when the exception is caught.
>
> Thank you in advance for saving me from transaction ignorance.
> Justin
>
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