public void rollback() throws HibernateException {
   realTxn.rollback();
   // System.out.println("XXX rollback: setting TXN_TLS to null");
   TXN_TLS.set(null);
 }
 public void commit() throws HibernateException {
   realTxn.commit();
   // System.out.println("XXX commit: setting TXN_TLS to null");
   TXN_TLS.set(null);
 }