net.sf.hibernate.jconsole.tester.HibernateSessions.java Source code

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Here is the source code for net.sf.hibernate.jconsole.tester.HibernateSessions.java

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/*
 * Copyright (c) 2010
 *
 * This file is part of HibernateJConsole.
 *
 *     HibernateJConsole 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.
 *
 *     HibernateJConsole 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 HibernateJConsole.  If not, see <http://www.gnu.org/licenses/>.
 */

package net.sf.hibernate.jconsole.tester;

import net.sf.hibernate.jconsole.util.HibernateJmxBinding;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import javax.management.MBeanServer;
import java.lang.management.ManagementFactory;
import java.lang.reflect.Method;

/**
 * Simple Hibernate initializer.
 *
 * @author Juergen_Kellerer, 2010-09-18
 * @version 1.0
 */
public final class HibernateSessions {

    static SessionFactory sessionFactory;
    static MBeanServer mBeanServer;

    public static MBeanServer getMBeanServer() {
        return mBeanServer;
    }

    /**
     * Returns a new hibernate session.
     *
     * @return a new hibernate session.
     */
    public static Session getSession() {
        initSessionFactory();
        try {
            final Method openSessionMethod = sessionFactory.getClass().getMethod("openSession");
            return (Session) openSessionMethod.invoke(sessionFactory);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Initializes the session factory (once for the JVM).
     */
    public static void initSessionFactory() {
        if (sessionFactory == null)
            try {
                doInitSessionFactory();
            } catch (Exception e) {
                sessionFactory = null;
                throw new RuntimeException(e);
            }
    }

    private static void doInitSessionFactory() throws Exception {
        Configuration cfg = new Configuration();
        cfg.addResource("net/sf/hibernate/jconsole/tester/test-message-entity.hbm.xml");
        cfg.setProperties(System.getProperties());

        cfg.setProperty("hibernate.connection.url", "jdbc:hsqldb:mem:mymemdb");
        cfg.setProperty("hibernate.connection.driver_class", "org.hsqldb.jdbc.JDBCDriver");
        cfg.setProperty("hibernate.connection.username", "SA");
        cfg.setProperty("hibernate.hbm2ddl.auto", "create-drop");

        sessionFactory = cfg.buildSessionFactory();
        mBeanServer = ManagementFactory.getPlatformMBeanServer();
        HibernateJmxBinding binding = new HibernateJmxBinding(mBeanServer, sessionFactory);
        binding.registerJmxBinding();
    }

    private HibernateSessions() {
    }
}