/*
* 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.tx;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;
import javax.persistence.FlushModeType;
import javax.persistence.LockModeType;
import javax.persistence.Query;
import org.hibernate.Session;
import org.hibernate.ejb.HibernateEntityManager;
import org.jboss.jpa.deployment.ManagedEntityManagerFactory;
import org.jboss.jpa.spi.PersistenceUnit;
import org.jboss.jpa.spi.PersistenceUnitRegistry;
import org.jboss.jpa.spi.XPCResolver;
import org.jboss.jpa.util.ManagedEntityManagerFactoryHelper;
import org.jboss.logging.Logger;
/**
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 79921 $
*/
public class TransactionScopedEntityManager implements EntityManager, Externalizable
{
private static final long serialVersionUID = 4260828563883650376L;
private static final Logger log = Logger.getLogger(TransactionScopedEntityManager.class);
private transient ManagedEntityManagerFactory factory;
public Session getHibernateSession()
{
EntityManager em = factory.getTransactionScopedEntityManager();
if (em instanceof HibernateEntityManager)
{
return ((HibernateEntityManager) em).getSession();
}
throw new RuntimeException("ILLEGAL ACTION: Not a Hibernate pe" +
"rsistence provider");
}
public TransactionScopedEntityManager(ManagedEntityManagerFactory factory)
{
if (factory == null) throw new NullPointerException("factory must not be null");
this.factory = factory;
}
public TransactionScopedEntityManager()
{
}
public void writeExternal(ObjectOutput out) throws IOException
{
out.writeUTF(factory.getKernelName());
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
String kernelName = in.readUTF();
factory = ManagedEntityManagerFactoryHelper.getManagedEntityManagerFactory(kernelName);
if ( factory == null ) throw new IOException( "Unable to find persistence unit in registry: " + kernelName );
}
public Object getDelegate()
{
return getEntityManager().getDelegate();
}
public void joinTransaction()
{
factory.verifyInTx();
getEntityManager().joinTransaction();
}
public void clear()
{
getEntityManager().clear();
}
public FlushModeType getFlushMode()
{
return getEntityManager().getFlushMode();
}
public void lock(Object entity, LockModeType lockMode)
{
factory.verifyInTx();
getEntityManager().lock(entity, lockMode);
}
public <T> T getReference(Class<T> entityClass, Object primaryKey)
{
EntityManager em = getEntityManager();
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
try
{
return em.getReference(entityClass, primaryKey);
}
finally
{
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
}
}
public void setFlushMode(FlushModeType flushMode)
{
getEntityManager().setFlushMode(flushMode);
}
public Query createQuery(String ejbqlString)
{
EntityManager em = getEntityManager();
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
return em.createQuery(ejbqlString);
}
public Query createNamedQuery(String name)
{
EntityManager em = getEntityManager();
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
return em.createNamedQuery(name);
}
public Query createNativeQuery(String sqlString)
{
EntityManager em = getEntityManager();
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
return em.createNativeQuery(sqlString);
}
public Query createNativeQuery(String sqlString, Class resultClass)
{
EntityManager em = getEntityManager();
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
return em.createNativeQuery(sqlString, resultClass);
}
public Query createNativeQuery(String sqlString, String resultSetMapping)
{
EntityManager em = getEntityManager();
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
return em.createNativeQuery(sqlString, resultSetMapping);
}
public <A> A find(Class<A> entityClass, Object primaryKey)
{
EntityManager em = getEntityManager();
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
try
{
return em.find(entityClass, primaryKey);
}
finally
{
if (!factory.isInTx()) em.clear(); // em will be closed by interceptor
}
}
public void persist(Object entity)
{
factory.verifyInTx();
getEntityManager().persist(entity);
}
public <A> A merge(A entity)
{
factory.verifyInTx();
return (A) getEntityManager().merge(entity);
}
public void remove(Object entity)
{
factory.verifyInTx();
getEntityManager().remove(entity);
}
public void refresh(Object entity)
{
factory.verifyInTx();
getEntityManager().refresh(entity);
}
public boolean contains(Object entity)
{
return getEntityManager().contains(entity);
}
public void flush()
{
factory.verifyInTx();
getEntityManager().flush();
}
public void close()
{
throw new IllegalStateException("Illegal to call this method from injected, managed EntityManager");
}
public boolean isOpen()
{
throw new IllegalStateException("Illegal to call this method from injected, managed EntityManager");
}
public EntityTransaction getTransaction()
{
throw new IllegalStateException("Illegal to call this method from injected, managed EntityManager");
}
protected EntityManager getEntityManager()
{
/* legacy
StatefulBeanContext beanContext = StatefulBeanContext.currentBean.get();
EntityManager em;
if (beanContext != null)
{
List<StatefulBeanContext> beanContexts = StatefulBeanContext.currentBean.getList();
for( StatefulBeanContext bc : beanContexts)
{
em = bc.getExtendedPersistenceContext(factory.getKernelName());
if (em != null)
return em;
}
}
*/
String kernelName = factory.getKernelName();
PersistenceUnit pu = PersistenceUnitRegistry.getPersistenceUnit(kernelName);
XPCResolver xpcResolver = pu.getXPCResolver();
EntityManager em = xpcResolver.getExtendedPersistenceContext(kernelName);
if(em != null)
return em;
return factory.getTransactionScopedEntityManager();
}
}