Hibernate transitions in a Free State and a permanent state

At hibernate in. After a PO surgery may be long, the session is out of date closed. At this point PO it has been the object of the Free State, in this state, in order to be converted into a protracted war, there are several methods as follows:

1, Session.saveorupdate (object).

The declaration will release the status Po into the persistent state PO to the database

2, Session.merge (object).

The declaration releases the status PO into the persistent state po. With the merge operation.

3, Session.lock (object, Lockmode.none). This statement will only Free State PO to switch to the persistent status Po, for other operations.

Only, the PO must not change. This approach is ideal for application-level

Hibernate transitions in a Free State and a permanent state