podd.dataaccess.hibernate.HibernateSessionHelper.java Source code

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Here is the source code for podd.dataaccess.hibernate.HibernateSessionHelper.java

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/*
 * Copyright (c) 2009 - 2010. School of Information Technology and Electrical
 * Engineering, The University of Queensland.  This software is being developed
 * for the "Phenomics Ontoogy Driven Data Management Project (PODD)" project.
 * PODD is a National e-Research Architecture Taskforce (NeAT) project
 * co-funded by ANDS and ARCS.
 *
 * PODD 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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PODD 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 PODD.  If not, see <http://www.gnu.org/licenses/>.
 */

package podd.dataaccess.hibernate;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.SessionFactoryUtils;
import org.springframework.orm.hibernate3.SessionHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;

/**
 * A spring/hibernate session helper to open and close sessions to avoid LazyInitializationException
 * @author Philip Wu
 *
 */
public class HibernateSessionHelper {

    public static void openSession(SessionFactory sessionFactory) {
        // To avoid LazyInitializationException       
        if (!TransactionSynchronizationManager.hasResource(sessionFactory)) {
            Session session = SessionFactoryUtils.getSession(sessionFactory, true);
            TransactionSynchronizationManager.bindResource(sessionFactory, new SessionHolder(session));
        }
    }

    public static void closeSession(SessionFactory sessionFactory) {
        // Release the session
        SessionHolder sessionHolder = (SessionHolder) TransactionSynchronizationManager
                .unbindResource(sessionFactory);
        SessionFactoryUtils.releaseSession(sessionHolder.getSession(), sessionFactory);
    }

}