com.pymegest.persistence.hibernate.HibernateUtil.java Source code

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Here is the source code for com.pymegest.persistence.hibernate.HibernateUtil.java

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/*
 * Project: PymeGestApplicationServer
 * Package: com.pymegest.persistence.hibernate
 * File: HibernateUtil.java
 * Date: 12-dic-2013
 * Encoding: UTF-8
 * License: GPL 3.0
 *
 * Copyright(c) PymeGest 2013
 * www.pymegest.com
 * admin@pymegest.com
 *
 * This file is part of Pymegest.
 * Pymegest 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
 * any later version.
 *
 * Pymegest 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 Pymegest. If not, see <http://www.gnu.org/licenses/>.
 */
package com.pymegest.persistence.hibernate;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.context.internal.ThreadLocalSessionContext;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

/**
 * Hibernate Utility class with a convenient method to get Session Factory
 *
 * @author Rafa Hernndez
 * @version 1.0
 * @since 1.0
 */
public class HibernateUtil {

    private static SessionFactory sessionFactory;

    public static synchronized void buildSessionFactory() {
        if (sessionFactory == null) {
            Configuration configuration = new Configuration();
            configuration.configure();
            configuration.setProperty("hibernate.current_session_context_class", "thread");
            ServiceRegistry serviceRegistry = new ServiceRegistryBuilder()
                    .applySettings(configuration.getProperties()).buildServiceRegistry();
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        }
    }

    public static void openSessionAndBindToThread() {
        Session session = sessionFactory.openSession();
        ThreadLocalSessionContext.bind(session);
    }

    public static SessionFactory getSessionFactory() {
        if (sessionFactory == null) {
            buildSessionFactory();
        }
        return sessionFactory;
    }

    public static void closeSessionAndUnbindFromThread() {
        Session session = ThreadLocalSessionContext.unbind(sessionFactory);
        if (session != null) {
            session.close();
        }
    }

    public static void closeSessionFactory() {
        if ((sessionFactory != null) && (sessionFactory.isClosed() == false)) {
            sessionFactory.close();
        }
    }
}