com.wontheone.hiber01.HibernateUtil.java Source code

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Here is the source code for com.wontheone.hiber01.HibernateUtil.java

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package com.wontheone.hiber01;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.service.ServiceRegistry;

/**
 * Hibernate Utility class with a convenient method to get Session Factory
 * object.
 *
 * @author Won Seob Seo <Wons at Metropolia UAS>
 */
public class HibernateUtil {

    private static final HibernateUtil instance = new HibernateUtil();

    private SessionFactory sessionFactory;

    private HibernateUtil() {
        try {
            // Create the SessionFactory from standard (hibernate.cfg.xml) 
            // config file.
            Configuration config = new Configuration();
            // config.addAnnotatedClass(com.wontheone.hiber01.Car.class);
            // config.addAnnotatedClass(com.wontheone.hiber01.Person.class);
            config.configure("hibernate.cfg.xml");
            new SchemaExport(config).create(true, true);
            StandardServiceRegistryBuilder serviceRegistryBuilder = new StandardServiceRegistryBuilder();
            serviceRegistryBuilder.applySettings(config.getProperties());
            ServiceRegistry serviceRegistry = serviceRegistryBuilder.build();
            sessionFactory = config.buildSessionFactory(serviceRegistry);
        } catch (Throwable ex) {
            // Log the exception. 
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    //    public static synchronized HibernateUtil getInstance() {
    //        return instance;
    //    }

    public static synchronized SessionFactory getSessionFactory() {
        return instance.sessionFactory;
    }
}