网元节点状态监控

在javaeye看到一篇文章：小小网管，其中部分代码项目中要用到，提取出来，进行了整合，网元状态监控的原理是周期性的ping该网元，ping不通，则上报告警，产生告警后，该网元则会展现不同的告警级别，之后如果ping通，则进行告警清楚；主要代码如下：

Thread linkCheckThread = new Thread() {

   @Override
   public void run() {
    while (true) {
     try {

      //System.out.println("进入网元监控");
      Thread.sleep(3000);

      for (int i = 0; i < list.size(); i++) {

       TemporaryNode tn = (TemporaryNode) list.get(i);

       final String ipaddress = tn.getNodeIP();
       System.out.println("ip:" + ipaddress);

       final boolean pingOK = ping(ipaddress);

       SwingUtilities.invokeLater(new Runnable() {

        public void run() {

         if (!pingOK) {
          Alarm alarm = new Alarm();
          alarm.setElementID(ipaddress);

          alarm
            .setProbableCause(AlarmProbableCause.LINE_INTERFACE_FAILURE);

          System.out.println("机器连接失败,产生告警");
          alarm
            .setAlarmSeverity(AlarmSeverity.CRITICAL);
          network.getDataBox().getAlarmModel()
            .addAlarm(alarm);
         } else {

          System.out.println("告警清楚....");
          Collection alarms = network
            .getDataBox()
            .getAlarmModel()
            .getAlarmsByElement(
              network
                .getDataBox()
                .getElementByID(
                  ipaddress));

          for (Iterator it = alarms.iterator(); it
            .hasNext();) {

           network.getDataBox()
             .getAlarmModel()
             .removeAlarm(
               (Alarm) it.next());

          }

         }

        }
       });
      }
     } catch (InterruptedException ex) {
      ex.printStackTrace();
     }

    }
   }
  };
  linkCheckThread.start();

以下是ping的方法：

/**
  * 使用InetAddress的isReachable方法实现ping
  *
  * @param ip
  * @return
  */
 public static boolean ping(String ip) {
  try {
   InetAddress ipaddress = InetAddress.getByName(ip);
   return ipaddress.isReachable(2000);
  } catch (Exception ex) {
   ex.printStackTrace();
   return false;
  }
 }