HibernateSingleton

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/sampledb");

//change the next two lines of code to match your MySQL user name and password.

config.setProperty("hibernate.connection.username", "student");

config.setProperty("hibernate.connection.password", "student");

//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(){

}

}