HibernateCon.java

package sdf.common.sf;

import java.util.HashMap;
import java.util.Map;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

public enum HibernateCon {
  INSTANCE;
	
	private SessionFactory sessionFactory;
	
	private HibernateCon(){
		System.out.println(" IN ENUM HibernateCon ");
		sessionFactory = buildFactory();
	}
	
	private SessionFactory buildFactory(){
		SessionFactory sf = null;		
		Configuration cfg = null;
		ServiceRegistry serviceReg = null;
		ServiceRegistryBuilder serviceRegBuilder = null;
		Map<String, String> map = null;
		try{
			cfg = new Configuration();
			map = new HashMap<String, String>();
			map.put("hibernate.connection.driver_class", "org.apache.derby.jdbc.ClientDriver");
			map.put("hibernate.connection.url", "jdbc:derby://localhost:1527/sun-appserv-samples");
			map.put("hibernate.connection.username", "APP");
			map.put("hibernate.connection.password", "app");
			map.put("hibernate.dialect", "org.hibernate.dialect.DerbyDialect");
			map.put("hibernate.show_sql", "true");
			map.put("hibernate.format_sql", "true");
			
			cfg.addResource("Student.hbm.xml");
			serviceRegBuilder = new ServiceRegistryBuilder();
			serviceReg = serviceRegBuilder.applySettings(map).buildServiceRegistry();
			sf = cfg.buildSessionFactory(serviceReg);
		}catch(Exception e){
			System.out.println(" EXCEPTION WHILE BUILDING SESSION-FACTORY ");
			e.printStackTrace();
		}
		return sf;
	}
	
	public SessionFactory getSessionFactory(){
		return this.sessionFactory;
	}
}