if (log.isTraceEnabled()) { log.trace("setting rollback_only on " + this); }
if (trace) { log.trace("setting rollback_only on " + this); }
   public void setRollbackOnly() throws Exception   {      if (log.isTraceEnabled()) { log.trace("setting rollback_only on " + this); }      state = STATE_ROLLBACK_ONLY;   }