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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