Hello,

I am new to hibernate so maybe it is a stupid question.
I have made a simple application:
public static void main ( String[] args )throws HibernateException
{
Configuration cfg = new Configuration();
cfg.addClass(ch2.Message.class);

SessionFactory sf = cfg.buildSessionFactory();
Session session = sf.openSession();
Transaction tx = null;

try{
tx = session.beginTransaction();
Message message = new Message("Hello World");
Message nMes = new Message("hibernate");

session.save(message);
session.save(nMes);
tx.commit();
} catch (HibernateException e) {
if (tx!=null)
tx.rollback();
throw e;
}
finally {

session.close();
}
}

Everything is working fine he's writing the messages to the database.
Only i have a problem when i'm running the application again i want to right the same values again to the database. So i have 4 messages in the database:

1 -- Hello World
2 -- hibernate
3 -- Hello World
4 -- hibernate

but it looks like he overwrite the values in the database so the result is everytime:

1 -- Hello World
2 -- hibernate

anybody a suggestion?

Bart

what is your primary key definition?