br.com.prototipo.util.HibernateUtil.java Source code

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Here is the source code for br.com.prototipo.util.HibernateUtil.java

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package br.com.prototipo.util;

import org.hibernate.Session;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.SessionFactory;

/**
 * Hibernate Utility class with a convenient method to get Session Factory
 * object.
 *
 * @author Mateus
 */
public class HibernateUtil {

    private static final SessionFactory sessionFactory;
    private static final ThreadLocal sessionThread;

    static {
        try {
            // Create the SessionFactory from standard (hibernate.cfg.xml) 
            // config file.
            sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
            sessionThread = new ThreadLocal();
        } catch (Throwable ex) {
            // Log the exception. 
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    public static Session getCurrentSession() {
        Session session = (Session) sessionThread.get();
        if (session == null) {
            session = sessionFactory.openSession();
            sessionThread.set(session);
        }
        return session;
    }

    public static void closeSession() {
        Session session = (Session) sessionThread.get();
        sessionThread.set(null);
        if (session != null && session.isOpen()) {
            session.flush();
            session.close();
        }
    }

}