org.hibernate.envers.internal.synchronization.SessionCacheCleaner Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, 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.envers.internal.synchronization;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.action.spi.AfterTransactionCompletionProcess;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.event.spi.EventSource;
/**
* Class responsible for evicting audit data entries that have been stored in the session level cache.
* This operation increases Envers performance in case of massive entity updates without clearing persistence context.
*
* @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
*/
public class SessionCacheCleaner {
/**
* Schedules audit data removal from session level cache after transaction completion. The operation is performed
* regardless of commit success.
*
* @param session Active Hibernate session.
* @param data Audit data that shall be evicted (e.g. revision data or entity snapshot)
*/
public void scheduleAuditDataRemoval(final Session session, final Object data) {
((EventSource) session).getActionQueue().registerProcess(
new AfterTransactionCompletionProcess() {
public void doAfterTransactionCompletion(boolean success, SessionImplementor sessionImplementor) {
if ( !sessionImplementor.isClosed() ) {
try {
( (Session) sessionImplementor ).evict( data );
}
catch ( HibernateException ignore ) {
}
}
}
}
);
}
}