code: @Override
      public void rollback(final Xid _xid)
          throws XAException
      {
          try {
              getSession().logout();
          } catch (final EFapsException e) {
              throw new XAException("EFapsException");
          }
      }
docs: On rollback no save is send to the session..
  
  @param _xid      global transaction identifier (not used, because each
  file with the file id gets a new VFS store resource
  instance)
  @throws XAException if any exception occurs (catch on
  {@link java.lang.Throwable})