HibernateUtilSingleton.java
package edu.byui.examples;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
/*
* This class follows the singleton pattern.
*/
public class HibernateUtilSingleton
{
private static final SessionFactory sessionFactory;
static
{
try
{
AnnotationConfiguration config = new AnnotationConfiguration();
config.setProperty(“hibernate.dialect”, “org.hibernate.dialect.MySQLDialect”);
config.setProperty(“hibernate.connection.driver_class”, “com.mysql.jdbc.Driver”);
//change the next line of code to match your MySQL url
config.setProperty(“hibernate.connection.url”, “jdbc:mysql://localhost/test”);
//change the next two lines of code to match your MySQL user name and password.
config.setProperty(“hibernate.connection.username”, “dude”);
config.setProperty(“hibernate.connection.password”, “hey2dude”);
//change the pool size to reflect how many users you expect your application to have initially
config.setProperty(“hibernate.connection.pool_size”, “1″);
config.setProperty(“hibernate.connection.autocommit”, “true”);
config.setProperty(“hibernate.cache.provider_class”, “org.hibernate.cache.NoCacheProvider”);
/*
* un-comment the next line of code if you want to be able to drop and recreate tables for your data classes listed below. This is generally a bad idea for security reasons.
*/
//config.setProperty(“hibernate.hbm2ddl.auto”, “create-drop”);
config.setProperty(“hibernate.show_sql”, “true”);
config.setProperty(“hibernate.transaction.factory_class”, “org.hibernate.transaction.JDBCTransactionFactory”);
config.setProperty(“hibernate.current_session_context_class”, “thread”);
/*
* Add your classes here that you want to match your database tables
* The example has a User and a PhoneNumber class.
*/
config.addAnnotatedClass(User.class);
config.addAnnotatedClass(PhoneNumber.class);
sessionFactory = config.buildSessionFactory();
}
catch (Throwable ex)
{
System.err.println(“Initial SessionFactory creation failed.” + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory()
{
return sessionFactory;
}
//make a private default constructor so that no other HibernateUtil can be created.
private HibernateUtilSingleton(){
}
}
