On Jun 22, 2008, at 11:17 AM, Martin Uhlir wrote:
hi,
i'm new to ejb so sorry for my simple question, but i could not find
the answer anywhere. i have a web app using openejb. in a client i
call a business mothod of an ejb bean and the question is how i can
get to know in the client if the business method was commited or
rolled back?? i need to know this to be able to decide which page
should be returned to the user.
For container managed transactions (the default) you can assume the
transaction was committed if no exception was thrown to the client
(either by the bean or the container).
If an exception was received by the client it still may be possible
that the transaction was still committed. The bean can throw "App
Exceptions" which the container will treat as a normal return type
will not cause the container to rollback the transaction. The basic
policy is throwing a checked exception (i.e. it's declared in your
throws clause) from the bean method does not cause the container to
rollback the transaction, throwing an unchecked exception (i.e. a
RuntimeException or subclass) from the bean method does cause the
container to rollback the transaction. A minor note, it is possible
to throw unchecked exceptions and have them not rollback the
transaction by annotating them with @ApplicationException, though most
people don't use that feature.
-David
