On Dec 17, 2009, at 3:52 AM, Mansour Al Akeel wrote:
@TransactionAttribute(TransactionAttributeType.REQUIRED)
@TransactionManagement(TransactionManagementType.BEAN)
@Stateful
public class RestaurantDao3 extends BaseDao<Restaurant, Long>
implements
IRestaurantDao {
If you're using OpenEJB 3.1.x, you should be getting a warning saying
the @TransactionAttribute annotation will be ignored as you are not
using Container-Managed Transactions --
@TransactionManagement(TransactionManagementType.CONTAINER)
@Override
public Restaurant create(Restaurant obj)
{
try
{
Context ctx = new InitialContext();
UserTransaction ut = (UserTransaction) ctx
.lookup("java:comp/UserTransaction");
ut.begin();
obj = getEntityManager().merge(obj);
getEntityManager().persist(obj);
getEntityManager().flush();
ut.commit();
} catch (Exception e)
{
e.printStackTrace();
}
return obj;
}
....
}
I am getting the same exception, if I remove the line
"entityManager.flush()" then it works fine but nothing is saved to the
the DB.
The expection I get is:
<openjpa-1.2.1-r752877:753278 nonfatal user error>
org.apache.openjpa.persistence.TransactionRequiredException: Can only
perform operation while a transaction is active.
at
org
.apache
.openjpa.kernel.BrokerImpl.assertActiveTransaction(BrokerImpl.java:
4380)
at
org
.apache
.openjpa
.kernel
.DelegatingBroker.assertActiveTransaction(DelegatingBroker.java:1330)
at
org
.apache
.openjpa.persistence.EntityManagerImpl.flush(EntityManagerImpl.java:
591)
at
org
.apache
.openejb.persistence.JtaEntityManager.flush(JtaEntityManager.java:130)
This should be fine depending on how you get your entity manager
reference and how your persistence unit is declared. Your persistence
unit should be of type TRANSACTION and you should be using
@PersistenceContext to get a reference to the EntityManager (not
@PersistenceUnit or an EntityManagerFactory).
Hope this helps.
-David
