I think it's a really common question but i cant find it in the forum.
In my my webapp, I load an entity with HibernateFilter.getSession().load(myClass, id). My entity is then populated by some input parameters. Afterwards, my entity is validated. In case of errors, i would like to "rollback" the changes, I dont want when my session will be closed, the errors are persisted in db. How can I do ?
Thank you a lot.
R.

Are you using the Hibernate transaction management strategy, or utilizing JTA transactions?

hibernate.transaction.factory_class net.sf.hibernate.transaction.JDBCTransactionFactory

Thank you for your help.

If you don't have a handle to the transaction (i.e, you never called session.beginTransaction()), you can try evicting the instance from session (session.evict()) prior to flushing.

Otherwise, just call transaction.rollback()

If i use a transaction, s.beginTransaction(), a rollback cancels only the flushing to db ? You have to discard the session ? Im right ?

What makes you say that?

I tried the evict() method, but unfortunately i cant understand Hibernate flushes automatically my entity as soon as its has been modified, and COMMIT it (whitout any intervention from me) , so evict() becomes useless. Can you explain me ?

Here is my conf :
Hibernate 2.1b4
Proxool
Postgresql 7.3

Thank you for your help.

I resolved my problem with a session.setFlushMode(FlushMode.COMMIT).
Thank you.