if (log.isDebugEnabled()) log.debug("("+me+")AggPlugin: execute");
if (log != null && log.isDebugEnabled()) log.debug("("+me+")AggPlugin: execute");
  public void execute()  {    if (log.isDebugEnabled()) log.debug("("+me+")AggPlugin: execute");    checkNewMessages();    checkNewQueries();    checkUpdatedQueries();    checkRemovedQueries();  }