org.hibernate.cache.jbc.util.NonLockingDataVersion Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2007, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.cache.jbc.util;
import org.hibernate.cache.jbc.entity.TransactionalAccess;
import org.jboss.cache.config.Option;
import org.jboss.cache.optimistic.DataVersion;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* {@link DataVersion} used in regions where no locking should ever occur. This
* includes query-caches, update-timestamps caches, collection caches, and
* entity caches where the entity is not versioned.
*
* @author Brian Stansberry
* @version $Revision: 1 $
*/
public class NonLockingDataVersion implements DataVersion {
private static final Logger log = LoggerFactory.getLogger(TransactionalAccess.class);
private static final long serialVersionUID = 7050722490368630553L;
public static final DataVersion INSTANCE = new NonLockingDataVersion();
public static Option getInvocationOption() {
Option option = new Option();
option.setDataVersion(INSTANCE);
return option;
}
public boolean newerThan(DataVersion dataVersion) {
// if (dataVersion instanceof DefaultDataVersion) {
// log.info("unexpectedly validating against a DefaultDataVersion", new Exception("Just a stack trace"));
// return true;
// }
// else {
log.trace("non locking lock check...");
return false;
// }
}
}