org.httprpc.examples.hibernate.HibernateSessionFactoryManager.java Source code

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Here is the source code for org.httprpc.examples.hibernate.HibernateSessionFactoryManager.java

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/*
 * 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 org.httprpc.examples.hibernate;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

/**
 * Hibernate session factory manager.
 */
public class HibernateSessionFactoryManager implements ServletContextListener {
    private static SessionFactory sessionFactory = null;

    /**
     * Returns the session factory instance.
     *
     * @return
     * The session factory instance.
     */
    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    @Override
    public void contextInitialized(ServletContextEvent servletContextEvent) {
        StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();

        try {
            sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();
        } catch (Exception exception) {
            StandardServiceRegistryBuilder.destroy(registry);
        }
    }

    @Override
    public void contextDestroyed(ServletContextEvent servletContextEvent) {
        if (sessionFactory != null) {
            sessionFactory.close();
        }
    }
}