I'm new to Hibernate and I'm trying to use the latest Hibernate EntityManager code with MySQL in a J2SE environment.

If I persist an object, then query that object, the query return null.
If I persist the object, then flush the entity manager, the query is successfull.

I wasn't expecting to have to flush the entity manager after every persist or remove call.


I've also just discovered that if I wrap the persist in a transaction, then a query works ...

em.getTransaction().begin();
em.persist(user);
em.getTransaction.commit();

Query query = em.createQuery("select user from User as user");
return (List<User>) query.getResultList();

Is there a setting I'm missing, or does this have something to do with the transaction model when running in a J2SE environment?

Bryan

Maybe missing EM.joinTransaction() [http://www.hibernate.org/hib_docs/entitymanager/reference/en/html_single/#d0e1836] - as in joining current transaction.

of course you *must* use transaction demarcation