Hi all, i have some questions about interaction with hibernate.

1. openSession or getCurrentSession (without jta, thread insted)?

2. How mix session operations with swing gui? Is good have something like this in a javabean class?

   public void actionPerformed(ActionEvent event) {
       // session code
   }
   

3. Can i add methods to my entities that contains hql queries or is a bad practice? For example:

    // This method is in an entity MyOtherEntity.java class
    public int getDuration(){
       Session session=HibernateUtil.getSessionFactory().getCurrentSession();
       session.beginTransaction();
       int sum=(Integer)session.createQuery("select sum(e.duration) as duration from MyEntity as e where e.myOtherEntity.id=:id group by e.name").
           .setLong("id", getId());
           .uniqueResult();
       return sum;
    }
   

In alternative how can i do this in a better and elegant way?

Thanks.