Red Hat Training

A Red Hat training course is available for JBoss Enterprise Application Platform Common Criteria Certification

3.9.2. Outside a transaction

In an EXTENDED persistence context, all read only operations of the entity manager can be executed outside a transaction (find(), getReference(), refresh(), and read queries). Some modifications operations can be executed outside a transaction, but they are queued until the persistence context join a transaction. This is the case of persist(), merge(), remove(). Some operations cannot be called outside a transaction: flush(), lock(), and update/delete queries.