persistencia y transacciones

otra forma de establecer los boundaries de la transacción:

package hello;
import java.util.*;
import org.hibernate.*;
import persistence.*;
public class HelloWorld {
public static void main(String[] args) {
// First unit of work
Session session =
HibernateUtil.getSessionFactory().openSession();
Transaction tx = session.beginTransaction();
Message message = new Message("Hello World");
Long msgId = (Long) session.save(message);
tx.commit();
session.close();
// Second unit of work
Session newSession =
HibernateUtil.getSessionFactory().openSession();
Transaction newTransaction = newSession.beginTransaction();
List messages =
newSession.createQuery("from Message m order by
➥ m.text asc").list();
System.out.println( messages.size() +
" message(s) found:" );
for ( Iterator iter = messages.iterator();
iter.hasNext(); ) {
Message loadedMsg = (Message) iter.next();
System.out.println( loadedMsg.getText() );
}
newTransaction.commit();
newSession.close();
// Shutting down the application
HibernateUtil.shutdown();
}
}

sacado del chapter2.pdf del libro de hibernate (pag.47)