[jboss-user] [Persistence, JBoss/CMP, Hibernate, Database] - server side validation / rolling back update
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Tue Dec 11 13:15:53 EST 2007
I cannot find a general way of doing this - suppose a form is submitted which passes JSF standard validation, but then i find a specific validation failure in my backing bean. I want to be able to return to the page and display an error message, but rather the update is being persisted and then i am returned to the page (displaying the error message).
Is there a neat way i can prevent the entity manager from updating in this way, eg throw a specific exception (that doesn't crash the whole app), or some other way of preventing the EM from flushing?
I've come across @Begin(flushmode=MANUAL) but i dont want to cause confusion with all my other bean methods that currently work fine.
cheers in advance
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