/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.jpa.deployment;
import java.util.HashMap;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.TransactionRequiredException;
import javax.transaction.RollbackException;
import javax.transaction.Synchronization;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import org.jboss.jpa.util.ThreadLocalStack;
import org.jboss.logging.Logger;
import org.jboss.tm.TransactionLocal;
import org.jboss.tm.TxUtils;
/**
* @author <a href="mailto:gavine@hibernate.org">Gavin King</a>
* @version $Revision: 75254 $
*/
public class ManagedEntityManagerFactory
{
private static final Logger log = Logger.getLogger(ManagedEntityManagerFactory.class);
protected EntityManagerFactory entityManagerFactory;
protected TransactionLocal session = new TransactionLocal();
protected String kernelName;
public static ThreadLocalStack<Map<ManagedEntityManagerFactory, EntityManager>> nonTxStack = new ThreadLocalStack<Map<ManagedEntityManagerFactory, EntityManager>>();
public EntityManager getNonTxEntityManager()
{
Map<ManagedEntityManagerFactory, EntityManager> map = nonTxStack.get();
EntityManager em = null;
if (map != null)
em = map.get(this);
else
{
map = new HashMap<ManagedEntityManagerFactory, EntityManager>();
nonTxStack.push(map);
}
if (em == null)
{
em = entityManagerFactory.createEntityManager();
map.put(this, em);
}
return em;
}
public ManagedEntityManagerFactory(EntityManagerFactory sf, String kernelName)
{
this.entityManagerFactory = sf;
this.kernelName = kernelName;
}
public EntityManagerFactory getEntityManagerFactory()
{
return entityManagerFactory;
}
public String getKernelName()
{
return kernelName;
}
public void destroy()
{
entityManagerFactory.close();
}
private static class SessionSynchronization implements Synchronization
{
private EntityManager manager;
// private Transaction tx;
private boolean closeAtTxCompletion;
public SessionSynchronization(EntityManager session, Transaction tx, boolean close)
{
this.manager = session;
// this.tx = tx;
closeAtTxCompletion = close;
}
public void beforeCompletion()
{
/* IF THIS GETS REACTIVATED THEN YOU MUST remove the if(closeAtTxCompletion) block in getSession()
try
{
int status = tx.getStatus();
if (status != Status.STATUS_ROLLEDBACK && status != Status.STATUS_ROLLING_BACK && status != Status.STATUS_MARKED_ROLLBACK)
{
if (FlushModeInterceptor.getTxFlushMode() != FlushModeType.NEVER)
{
log.debug("************** flushing.....");
manager.flush();
}
}
}
catch (SystemException e)
{
throw new RuntimeException(e);
}
*/
}
public void afterCompletion(int status)
{
if (closeAtTxCompletion)
{
log.debug("************** closing entity managersession **************");
manager.close();
}
}
}
public TransactionLocal getTransactionSession()
{
return session;
}
public void registerExtendedWithTransaction(EntityManager pc)
{
pc.joinTransaction();
session.set(pc);
}
public void verifyInTx()
{
Transaction tx = session.getTransaction();
if (tx == null || !TxUtils.isActive(tx)) throw new TransactionRequiredException("EntityManager must be access within a transaction");
if (!TxUtils.isActive(tx))
throw new TransactionRequiredException("Transaction must be active to access EntityManager");
}
public boolean isInTx()
{
Transaction tx = session.getTransaction();
if (tx == null || !TxUtils.isActive(tx)) return false;
return true;
}
public EntityManager getTransactionScopedEntityManager()
{
Transaction tx = session.getTransaction();
if (tx == null || !TxUtils.isActive(tx)) return getNonTxEntityManager();
EntityManager rtnSession = (EntityManager) session.get();
if (rtnSession == null)
{
rtnSession = createEntityManager();
try
{
tx.registerSynchronization(new SessionSynchronization(rtnSession, tx, true));
}
catch (RollbackException e)
{
throw new RuntimeException(e); //To change body of catch statement use Options | File Templates.
}
catch (SystemException e)
{
throw new RuntimeException(e); //To change body of catch statement use Options | File Templates.
}
session.set(rtnSession);
rtnSession.joinTransaction(); // force registration with TX
}
return rtnSession;
}
public EntityManager createEntityManager()
{
return entityManagerFactory.createEntityManager();
}
}