/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.enterprise.gui.util;
import org.hibernate.SessionFactory;
import org.hibernate.stat.Statistics;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.rhq.core.domain.server.PersistenceUtility;
import org.rhq.enterprise.server.util.LookupUtil;
/**
* A utility to track down how many round trips hibernate may be doing for a given set of code.
* This just tracks the difference in raw connect counts and can be thrown off by connections
* made in other threads
*
* @author Greg Hinkle
*/
public class StatisticsUtility {
private Log log = LogFactory.getLog(StatisticsUtility.class);
private SessionFactory sessionFactory;
long connectionsAtStart;
long beginTime;
public StatisticsUtility() {
this.sessionFactory = PersistenceUtility.getHibernateSession(LookupUtil.getEntityManager())
.getSessionFactory();
Statistics stats = sessionFactory.getStatistics();
connectionsAtStart = stats.getConnectCount();
beginTime = System.currentTimeMillis();
}
public void logStats() {
Statistics stats = sessionFactory.getStatistics();
log.info("HibernateStats: " + (stats.getConnectCount() - connectionsAtStart) +
" connections made in " + (System.currentTimeMillis() - beginTime) + "ms");
}
}