Zookeeper客户端使用（使用zkclient）

 

Zookeeper客户端使用

 

二、使用zkclient

在pom.xml中加入依赖

<dependency>
  <groupId>com.101tec</groupId>
  <artifactId>zkclient</artifactId>
  <version>0.2</version>
</dependency>

直接上代码：

  1 /**
  2  * Project Name:mk-project <br>
  3  * Package Name:com.suns.zookeeper.zkclient <br>
  4  *
  5  * @author mk <br>
  6  * Date:2018-10-31 11:05 <br>
  7  */
  8 
  9 package com.suns.zookeeper.zkclient;
 10 
 11 import org.I0Itec.zkclient.IZkChildListener;
 12 import org.I0Itec.zkclient.IZkDataListener;
 13 import org.I0Itec.zkclient.ZkClient;
 14 import org.apache.zookeeper.CreateMode;
 15 import org.apache.zookeeper.data.Stat;
 16 
 17 import java.util.List;
 18 
 19 
 20 /**
 21  * zkclient客户端使用
 22  * 和原生zookeeper优点：
 23  * 1.使用api更方便
 24  * 2.订阅节点数据改变或者子节点变化，只需要订阅一次，便可以一直使用。而原生zookeeper的监听是一次性的，需要重复注册。
 25  * ClassName: ZkClientTest <br>
 26  * Description:  <br>
 27  * @author mk
 28  * @Date 2018-10-31 11:05 <br>
 29  * @version
 30  */
 31 public class ZkClientTest {
 32 
 33     public static final String connect = "127.0.0.1:2181";
 34     private static ZkClient zkClient = null;
 35     private static String nodePath = "/zkclient1";
 36     private static String nodeChildPath = "/zkclient1/n1/n11/n111/n1111";
 37 
 38     public static void main(String[] args) throws Exception {
 39 
 40         //初始化
 41         init(connect,5000);
 42 
 43         //订阅节点数据改变或者子节点变化，只需要订阅一次，便可以一直使用。而原生zookeeper的监听是一次性的，需要重复注册。
 44         subscribe();
 45 
 46         //新增
 47         create(nodePath,"n1");
 48         //递归新增
 49         createRecursion(nodeChildPath,"n1");
 50 
 51         //查询
 52         query(nodePath);
 53 
 54         //修改
 55         update(nodePath,"n11");
 56 
 57         //单个节点删除
 58 //        delete(nodePath);
 59         //递归删除
 60         deleteRecursion(nodePath);
 61 
 62     }
 63 
 64     private static void deleteRecursion(String path) {
 65         boolean result = zkClient.deleteRecursive(path);
 66         System.out.println("delete:"+"["+path+"],result:"+result);
 67     }
 68 
 69     private static void delete(String path) {
 70         boolean result = zkClient.delete(path);
 71         System.out.println("delete:"+"["+path+"],result:"+result);
 72     }
 73 
 74     private static void update(String path, String data) {
 75         Stat stat = zkClient.writeData(path, data);
 76         System.out.println("setData:"+"["+path+"],stat:"+stat);
 77     }
 78 
 79     private static void query(String path) {
 80         Object o = zkClient.readData(path);
 81         System.out.println("query:"+"["+path+"],result:"+o);
 82     }
 83 
 84     private static void createRecursion(String path,String data)  {
 85         zkClient.createPersistent(path,true);
 86         System.out.println("create:"+"["+path+"-->"+data);
 87     }
 88 
 89     private static void create(String path, String data) {
 90         boolean exists = zkClient.exists(path);
 91         if(exists){
 92             System.out.println("节点["+path+"]已存在，不能新增");
 93             return;
 94         }
 95         String result = zkClient.create(path, data, CreateMode.PERSISTENT);
 96         System.out.println("create:"+"["+path+"-->"+data+"],result:"+result);
 97     }
 98 
 99     private static void subscribe() {
100         //订阅节点内容改变
101         zkClient.subscribeDataChanges(nodePath, new IZkDataListener() {
102             @Override
103             public void handleDataChange(String path, Object data) throws Exception {
104                 System.out.println("handleDataChange----->"+path+"|"+data);
105             }
106 
107             @Override
108             public void handleDataDeleted(String path) throws Exception {
109                 System.out.println("handleDataDeleted----->"+path);
110             }
111         });
112 
113         //订阅子节点改变
114         zkClient.subscribeChildChanges(nodePath, new IZkChildListener() {
115             @Override
116             public void handleChildChange(String parentPath, List<String> list) throws Exception {
117                 System.out.println("handleChildChange----->"+parentPath+"|"+list);
118             }
119         });
120 
121     }
122 
123     private static void init(String connect, int sessionTimeout) {
124         zkClient = new ZkClient(connect, sessionTimeout);
125     }
126 }

 

 

运行结果：

 

 

posted on 2018-10-31 10:59  sgyi06  阅读(468)  评论(0)  编辑  收藏  举报

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