queuePing(new QueueEntry(agentNames, timeout, pl));
  public void ping(final String agentName, final long timeout, final PingListener pl) {    if (agentId.toString().equals(agentName)) {      pl.pingComplete(agentName, SUCCESS, 0l);  // Can't ping self, return SUCCESS    } else {      queuePing(new QueueEntry(MessageAddress.getMessageAddress(agentName),                               timeout, pl));    }  }