Session firstThreadSession = Config.getInstance().getSessionFactory().openSession();
firstThreadSession.get(Cat.class, "1");

//execute in another thread
Session secondThreadSession = Config.getInstance().getSessionFactory().openSession();

Transaction tx = secondThreadSession.beginTransaction();
Cat c = (Cat)secondThreadSession.get(Cat.class, "1");
c.setName("Changed name");
secondThreadSession.update(c);
tx.commit();
////////

System.out.println(((Cat)firstThreadSession.get(Cat.class, "1")).getName());