Reattach after delete and rollback

galland · **Posted:** Tue Dec 12, 2006 5:36 am

After getting an exception while deleting a bean, can I "reattach" the bean to the same session ?
I try this code

try {
session.delete(bean);
session.flush();
} catch (org.hibernate.exception.ConstraintViolationException e) {
session.getTransaction().rollback();
}

but it seems that the bean stays in "deleted" state in the session.
Further a new flush cause the same exception.
I try the reload the bean but I get a null bean
If I close and reopen the session its OK but if possible I want keep the session.

Thanks for your help.

batmat · **Posted:** Tue Dec 12, 2006 6:14 am

galland wrote:

After getting an exception while deleting a bean, can I "reattach" the bean to the same session ?
[...]
If I close and reopen the session its OK but if possible I want keep the session.

It's not possible. If an exception occured within a session, you must trash this session and create a new one.
See http://www.hibernate.org/hib_docs/v3/re ... tices.html :

Quote:

Don't treat exceptions as recoverable.

This is more of a necessary practice than a "best" practice. When an exception occurs, roll back the Transaction and close the Session. If you don't, Hibernate can't guarantee that in-memory state accurately represents persistent state. As a special case of this, do not use Session.load() to determine if an instance with the given identifier exists on the database; use Session.get() or a query instead.