code: @Override
      public void start(final Xid _xid,
                        final int _flags)
      {
          AbstractResource.LOG.trace("start resource {}, flags {}" + _flags, _xid, _flags);
      }
docs: The method starts work on behalf of a transaction branch specified in
  parameter <code>_xid</code>. Normally nothing must be done, because the
  pre-work is already done in the contructor (and an instance of a
  resource is only defined for one transaction).
  
  @param _xid      global transaction identifier
  @param _flags    flags