zookeeper api

 

 

 

**************************************ZkApiTest **************************************

ZooKeeper zooKeeper=new ZooKeeper("192.168.157.128:2181", 2000, new Watcher() {

 

 

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package com.itheima.zkDemo;

import org.apache.zookeeper.*;
import org.apache.zookeeper.data.Stat;
import org.junit.jupiter.api.Test;

import java.io.IOException;
import java.util.List;

public class ZkApiTest {
    @Test
    public  void test() throws IOException, KeeperException, InterruptedException {

        // 1、创建zookeeper连接
        ZooKeeper zooKeeper=new ZooKeeper("192.168.157.128:2181", 2000, new Watcher() {
            public void process(WatchedEvent watchedEvent) {
                System.out.println("触发了"+watchedEvent.getType()+"的事件");
            }
        });

        // 2、创建父节点
        //String path=zooKeeper.create("/itheima","itheimaValue".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
        //System.out.println(path);
        // 3、创建子节点
        //String childrenpath=zooKeeper.create("/itheima/children","childrenValue".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
       // System.out.println(childrenpath);
        // 4、获取节点中的值（父节点和子节点）
       // byte[] data=zooKeeper.getData("/itheima",false,null);
        //System.out.println(new String(data));
      //  List<String> children=zooKeeper.getChildren("/itheima",false);
       // for(String child:children)
       // {
        //    System.out.println(child);
       // }
        // 5、修改节点的值
        //Stat stat=zooKeeper.setData("/itheima","itheimaUpdate".getBytes(),-1);
       // System.out.println(stat);
        // 6、判断某个节点是否存在
        //Stat exists=zooKeeper.exists("/itheima/children",false);
        //System.out.println(exists);
        // 7、删除节点
        zooKeeper.delete("/itheima/children",-1);
    }

}