ZKClient操作zookeeper集群

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根据百度传课上的课程进行学习的zookeeper，记录一下zkclient的使用方法
（1）连接zookeeper

package com.lihao.zkClientTest;

import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.serialize.SerializableSerializer;

public class CreateSession {

	public static void main(String[] args) {
		// 建立连接
		ZkClient zkClient = new ZkClient("10.10.8.161:2188", 10000, 10000, new SerializableSerializer());
		System.out.println("connect ok");
	}

}

（2）创建节点znode

package com.lihao.zkClientTest;

import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.serialize.SerializableSerializer;
import org.apache.zookeeper.CreateMode;

public class CreateNode {

	public static void main(String[] args) {
		// 建立连接
		ZkClient zkClient = new ZkClient("10.10.8.161:2188", 10000, 10000, new SerializableSerializer());
		System.out.println("connect ok");
		User user = new User();
		user.setId(1);
		user.setName("lihao");
		String path = zkClient.create("/jike5", user, CreateMode.PERSISTENT);
		System.out.println("create path" + path);

	}

}

还有User必须实现Serializable 序列化接口

package com.lihao.zkClientTest;

import java.io.Serializable;

public class User implements Serializable {
	private Integer id;
	private String name;

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}

（3）获取数据

package com.lihao.zkClientTest;

import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.serialize.SerializableSerializer;
import org.apache.zookeeper.data.Stat;

public class GetData {

	public static void main(String[] args) {
		// 建立连接
		ZkClient zkClient = new ZkClient("10.10.8.161:2188", 10000, 10000, new SerializableSerializer());
		System.out.println("connect ok");
		Stat stat = new Stat();
		User user = zkClient.readData("/jike5", stat);
		System.out.println("id:" + user.getId());
		System.out.println("name:" + user.getName());
		System.out.println(stat);
	}

}

（4）获取子节点

package com.lihao.zkClientTest;

import java.util.List;

import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.serialize.SerializableSerializer;

public class GetChildren {

	public static void main(String[] args) {
		// 建立连接
		ZkClient zkClient = new ZkClient("10.10.8.161:2188", 10000, 10000, new SerializableSerializer());
		System.out.println("connect ok");
		List<String> cList = zkClient.getChildren("/jike5");
		System.out.println(cList.toString());
	}

}

（5）判断节点是否存在

package com.lihao.zkClientTest;

import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.serialize.SerializableSerializer;

public class NodeExists {

	public static void main(String[] args) {
		// 建立连接
		ZkClient zkClient = new ZkClient("10.10.8.161:2188", 10000, 10000, new SerializableSerializer());
		System.out.println("connect ok");
		boolean is = zkClient.exists("/jike5");
		System.out.println(is);
	}

}

（6）删除节点

package com.lihao.zkClientTest;

import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.serialize.SerializableSerializer;

public class DeleteNode {

	public static void main(String[] args) {
		// 建立连接
		ZkClient zkClient = new ZkClient("10.10.8.161:2188", 10000, 10000, new SerializableSerializer());
		System.out.println("connect ok");
		boolean is = zkClient.delete("/jike5");
		System.out.println("是否删除?" + is);
	}

}

（7）订阅消息
一、当节点子列表发生改变时

package com.lihao.zkClientTest;

import java.util.List;

import org.I0Itec.zkclient.IZkChildListener;
import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.serialize.SerializableSerializer;

/*
 * 订阅功能：子节点列表发生变化（增加，删除，创建，修改）时
 */
public class SubscribeChildChanges {
	private static class ZKChildListener implements IZkChildListener {

		public void handleChildChange(String parentPath, List<String> currentChilds) throws Exception {
			System.out.println(parentPath);
			System.out.println(currentChilds.toString());
		}

	}

	public static void main(String[] args) throws InterruptedException {

		// 建立连接
		ZkClient zkClient = new ZkClient("10.10.8.161:2188", 10000, 10000, new SerializableSerializer());
		System.out.println("connect ok");
		zkClient.subscribeChildChanges("/jike5", new ZKChildListener());
		Thread.sleep(Integer.MAX_VALUE);
	}

}

二、当节点的数据发生变化时

package com.lihao.zkClientTest;

import org.I0Itec.zkclient.IZkDataListener;
import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.serialize.BytesPushThroughSerializer;

/*
 * 订阅功能：节点数据发生变化时
 */
public class SubscribeDataChanges {
	private static class ZKDataListener implements IZkDataListener {

		public void handleDataChange(String dataPath, Object data) throws Exception {
			// TODO Auto-generated method stub
			System.out.println(dataPath + ":" + data);
		}

		public void handleDataDeleted(String dataPath) throws Exception {
			// TODO Auto-generated method stub
			System.out.println("delete:" + dataPath);
		}

	}

	public static void main(String[] args) throws InterruptedException {

		// 建立连接 实现另一种序列化方式
		ZkClient zkClient = new ZkClient("10.10.8.161:2188", 10000, 10000, new BytesPushThroughSerializer());
		System.out.println("connect ok");
		zkClient.subscribeDataChanges("/jike5", new ZKDataListener());
		Thread.sleep(Integer.MAX_VALUE);
	}

}