Hibernate example source code file (DefaultPostLoadEventListener.java)

This example Hibernate source code file (DefaultPostLoadEventListener.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

assertionfailure, defaultpostloadeventlistener, defaultpostloadeventlistener, entityentry, entityincrementversionprocess, entityincrementversionprocess, entitypersister, entityverifyversionprocess, entityverifyversionprocess, lifecycle, lockmode, object, object, postloadeventlistener

The Hibernate DefaultPostLoadEventListener.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.event.internal;

import org.hibernate.AssertionFailure;
import org.hibernate.LockMode;
import org.hibernate.action.internal.EntityIncrementVersionProcess;
import org.hibernate.action.internal.EntityVerifyVersionProcess;
import org.hibernate.classic.Lifecycle;
import org.hibernate.engine.spi.EntityEntry;
import org.hibernate.event.spi.PostLoadEvent;
import org.hibernate.event.spi.PostLoadEventListener;
import org.hibernate.persister.entity.EntityPersister;

/**
 * We do 2 things here:<ul>
 * <li>Call {@link Lifecycle} interface if necessary
 * <li>Perform needed {@link EntityEntry#getLockMode()} related processing
 * </ul>
 *
 * @author Gavin King
 * @author Steve Ebersole
 */
public class DefaultPostLoadEventListener implements PostLoadEventListener {
	
	public void onPostLoad(PostLoadEvent event) {
		final Object entity = event.getEntity();
		final EntityEntry entry = event.getSession().getPersistenceContext().getEntry( entity );
		if ( entry == null ) {
			throw new AssertionFailure( "possible non-threadsafe access to the session" );
		}

		final LockMode lockMode = entry.getLockMode();
		if ( LockMode.PESSIMISTIC_FORCE_INCREMENT.equals( lockMode ) ) {
			final EntityPersister persister = entry.getPersister();
			Object nextVersion = persister.forceVersionIncrement(
					entry.getId(), entry.getVersion(), event.getSession()
			);
			entry.forceLocked( entity, nextVersion );
		}
		else if ( LockMode.OPTIMISTIC_FORCE_INCREMENT.equals( lockMode ) ) {
			EntityIncrementVersionProcess incrementVersion = new EntityIncrementVersionProcess( entity, entry );
			event.getSession().getActionQueue().registerProcess( incrementVersion );
		}
		else if ( LockMode.OPTIMISTIC.equals( lockMode ) ) {
			EntityVerifyVersionProcess verifyVersion = new EntityVerifyVersionProcess( entity, entry );
			event.getSession().getActionQueue().registerProcess( verifyVersion );
		}

		if ( event.getPersister().implementsLifecycle() ) {
			//log.debug( "calling onLoad()" );
			( ( Lifecycle ) event.getEntity() ).onLoad( event.getSession(), event.getId() );
		}

	}
}