by.st.opt.payments.dao.util.HibernateUtil.java Source code

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Here is the source code for by.st.opt.payments.dao.util.HibernateUtil.java

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package by.st.opt.payments.dao.util;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.apache.log4j.Logger;

/**
 *
 * @author Mumish
 */
public class HibernateUtil {

    private static HibernateUtil util = null;

    private static Logger log = Logger.getLogger(HibernateUtil.class);

    private SessionFactory sessionFactory = null;

    private final ThreadLocal sessions = new ThreadLocal();

    private HibernateUtil() {
        try {
            sessionFactory = new Configuration().configure().setNamingStrategy(new CustomNamingStrategy())
                    .buildSessionFactory();
        } catch (Throwable ex) {
            log.error("Initial SessionFactory creation failed." + ex);
            System.exit(0);
        }
    }

    public Session getSession() {
        Session session = (Session) sessions.get();
        if (session == null) {
            session = sessionFactory.openSession();
            sessions.set(session);
        }

        return session;
    }

    public static synchronized HibernateUtil getHibernateUtil() {
        if (util == null) {
            util = new HibernateUtil();
        }
        return util;
    }
}