where to create Hibernatesession object.

vipul.khalasi · **Joined:** Mon Jun 23, 2008 6:21 am **Posts:** 1

Hi All

I need one suggestion from your.

It is fine to create hibernateSession object on struct sction file or servlet ?

Or it is fine to create it into java Class file ?

Cameron McKenzie · **Posted:** Mon Jun 23, 2008 10:29 am

Whatever makes the most sense is the best approach.

Usually, creating it in a HibernateService or HibernateUtil class is the most flexible or manageable solution.

Here's a sweet little tutorial on how to create a HibernateUtil class in Java. It's pretty helpful:

http://jpa.ezhibernate.com/Javacode/learn.jsp?tutorial=05samplehibernateutilclassexample

Code:

package com.examscam;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import com.examscam.model.User;

public class HibernateUtil {

 private static SessionFactory factory;

 public static Configuration  
             getInitializedConfiguration() {
   AnnotationConfiguration config = 
               new AnnotationConfiguration();
/* add all of your JPA annotated classes here!!! */
   config.addAnnotatedClass(User.class);
   config.configure();
   return config;
 }

 public static Session getSession() {
   if (factory == null) {
   Configuration config =  
      HibernateUtil.getInitializedConfiguration();
   factory = config.buildSessionFactory();
   }
   Session hibernateSession = 
                   factory.getCurrentSession();
   return hibernateSession;
 }

 public static void closeSession() {
   HibernateUtil.getSession().close();
 }


 public static void recreateDatabase() {
   Configuration config;
   config = 
       HibernateUtil.getInitializedConfiguration();
   new SchemaExport(config).create(true, true);
 }

 public static Session beginTransaction() {
   Session hibernateSession;
   hibernateSession = HibernateUtil.getSession();
   hibernateSession.beginTransaction();
   return hibernateSession;
 }

 public static void commitTransaction() {
   HibernateUtil.getSession()
                .getTransaction().commit();
 }

 public static void rollbackTransaction() {
   HibernateUtil.getSession()
                 .getTransaction().rollback();
 }

  public static void main(String args[]) {
    HibernateUtil.recreateDatabase();
  }

}