zookeeper客户端使用第三方(zkclient)封装的Api操作节点

• 引入依赖

<dependency>
      <groupId>com.101tec</groupId>
      <artifactId>zkclient</artifactId>
      <version>0.10</version>
</dependency>

• 会话连接

 package com.karat.cn.zookeeper.zkclient;

 import org.I0Itec.zkclient.ZkClient;
 /**
  * 创建会话(连接zookeeper)
  * @author 开发
  *
  */
 public class SessionDemo {

      private final static String CONNECTSTRING="47.107.121.215:2181";

      public static void main(String[] args) {
           ZkClient zkClient=new ZkClient(CONNECTSTRING,4000);
           System.out.println(zkClient+" - > success连接");
      }
 }

• 节点简单操作

 package com.karat.cn.zookeeper.zkclient;

 import java.util.List;
 import java.util.concurrent.TimeUnit;

 import org.I0Itec.zkclient.IZkChildListener;
 import org.I0Itec.zkclient.IZkDataListener;
 import org.I0Itec.zkclient.ZkClient;
 /**
  * 节点操作
  * @author Administrator
  *
  */
 public class ZkClientApiOperatorDemo {

     private final static String CONNECTSTRING="47.107.121.215:2181";

     private static ZkClient getInstance(){
         return new ZkClient(CONNECTSTRING,10000);//10000是连接超时时间
     }

     public static void main(String[] args) throws InterruptedException {
         ZkClient zkClient=getInstance();//连接
         //zkClient.createEphemeral("/zkClient");//创建临时节点
         //zkClient中提供递归创建父节点的功能
         //zkClient.createPersistent("/zkClient/a/b/c/d",true);//创建持久化节点
         //删除节点
         //zkClient.delete("/zkClient");
         //递归删除节点
         //zkClient.deleteRecursive("/zkClient");
         //获取子节点
         List<String> list=zkClient.getChildren("/zkClient/a");
         System.out.println(list);

         //watcher(订阅获取)
         zkClient.subscribeDataChanges("/node", new IZkDataListener() {

             @Override
             public void handleDataDeleted(String dataPath) throws Exception {
                 // TODO Auto-generated method stub

             }

             @Override
             public void handleDataChange(String dataPath, Object data) throws Exception {
                 // TODO Auto-generated method stub
                 System.out.println("节点名称："+dataPath+"->节点修改后的值"+data);
             }
         });

         zkClient.writeData("/node", "123");//修改节点的数据
         TimeUnit.SECONDS.sleep(2);//上述事件是异步的，需要睡两秒

         zkClient.subscribeChildChanges("/node", new IZkChildListener() {

             @Override
             public void handleChildChange(String parentPath, List<String> currentChilds) throws Exception {
                 // TODO Auto-generated method stub

             }
         });
     }
 }