zookeeper客户端读取子节点的信息

来源：互联网发布：淘宝如何查找附近的人编辑：程序博客网时间：2024/05/16 06:21

在zookeeper目录下启动zookeeper客户端：./zkCli.sh(在bin目录下)

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用 ls /命令来显示该节点下所有的子节点，get /MsgBusMonitor显示该节点下的所有详细信息。

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Object[][] result = null;//连接服务器的IP地址和端口号String connectString = "10.0.0.100:2181";//超时时间int sessionTimeout = 5000;try {    zk = new ZooKeeper(connectString, sessionTimeout, new Watcher() {        @Override        public void process(WatchedEvent event) {            //不做操作        }    });    // 获取任务实例example,task_schedule是子节点    List<String> example = zk.getChildren("/task_schedule", true);    List<String> list = null;    int number = 0;int allCount = 0;    for (int j = 0; j < example.size(); j++) {        List<String> runNode = zk.getChildren("/task_schedule/" + example.get(j), true);        boolean numberFlag = true;        if (runNode != null || !runNode.equals("")) {// 节点存在的时候            for (int i = 0; i < runNode.size(); i++) {                number++;                numberFlag = false;            }        }        if(numberFlag==true){            allCount++;        }    }    result = new Object[number+allCount][3];    int a = 0;    for (int j = 0; j < example.size(); j++) {        boolean flag = true;        // 获取运行节点runNode        List<String> runNode = zk.getChildren("/task_schedule/" + example.get(j), true);        if (runNode != null || !runNode.equals("")) {// 节点存在的时候            for (int i = 0; i < runNode.size(); i++) {                byte[] data = zk.getData("/task_schedule/" + example.get(j) + "/" + runNode.get(i), null,                        null);                result[a][0] = example.get(j);                result[a][1] = runNode.get(i);                if(Character.isDigit(new String(data).charAt(0))){                    result[a][2] = new String(data);                }else{                    result[a][2] = "任务获取失败";                }                a++;                flag = false;            }        }        if (flag == true) {            result[a][0] = example.get(j);            result[a][1] = "";            result[a][2] = "";            a++;        }    }} catch (KeeperException e) {    e.printStackTrace();} catch (InterruptedException e) {    e.printStackTrace();} catch (IOException e) {    e.printStackTrace();}

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