if (System.currentTimeMillis() - time > TIMEOUT) sessionFactory = getSessionFactory(); time = System.currentTimeMillis();
	public static Session getCurrentSession() throws HibernateException {	    Session s = (Session) session.get();	    	    // ouverture d'une nouvelle Session, si ce Thread n'en a aucune	    if (s == null) {	        s = sessionFactory.openSession();	        session.set(s);	    }	    	    return s;	}