com.r573.enfili.common.resource.db.hibernate.HibernateManager.java Source code

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Here is the source code for com.r573.enfili.common.resource.db.hibernate.HibernateManager.java

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/*
 * Enfili
 * Project hosted at https://github.com/ryanhosp/enfili/
 * Copyright 2013 Ho Siaw Ping Ryan
 *    
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 *   
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.r573.enfili.common.resource.db.hibernate;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public final class HibernateManager {
    @SuppressWarnings("unused")
    private static final Logger log = LoggerFactory.getLogger(HibernateManager.class);
    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private static SessionFactory sessionFactory = null;

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    public static void init() {
        sessionFactory = new Configuration().configure().buildSessionFactory();
    }

    public static void init(Configuration configuration) {
        sessionFactory = configuration.buildSessionFactory();
    }

    public static Session currentSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        if (session == null) {
            session = sessionFactory.openSession();
            session.beginTransaction();
            threadLocal.set(session);
        }
        return session;
    }

    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        if (session != null) {
            if (session.isOpen()) {
                if ((session.getTransaction() != null) && (session.getTransaction().isActive())) {
                    session.getTransaction().commit();
                }
                session.close();
            }
            threadLocal.set(null);
        }
    }

    public static void rollback() {
        Session session = (Session) threadLocal.get();
        if (session != null) {
            Transaction transaction = session.getTransaction();
            if (transaction != null) {
                transaction.rollback();
            }
        }
    }
}