Zookeeper----管理工具&&ZKClient

一.管理工具

http://www.massedynamic.org/eclipse/updates/

二.實際應用場景

三.ZKClient工具

package bhz.zkclient.base;

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

import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.ZkConnection;

public class ZkClientBase {

	/** zookeeper地址 */
	static final String CONNECT_ADDR = "192.168.1.171:2181,192.168.1.172:2181,192.168.1.173:2181";
	/** session超時時間 */
	static final int SESSION_OUTTIME = 5000;//ms 
	
	
	public static void main(String[] args) throws Exception {
		ZkClient zkc = new ZkClient(new ZkConnection(CONNECT_ADDR), 5000);
		//1. create and delete方法 
		zkc.createEphemeral("/temp");
		zkc.createPersistent("/super/c1", true);
		Thread.sleep(10000);
		zkc.delete("/temp");
		zkc.deleteRecursive("/super");
		
		//2. 設置path和data 並且讀取子節點和每個節點的內容
//		zkc.createPersistent("/super", "1234");
//		zkc.createPersistent("/super/c1", "c1內容");
//		zkc.createPersistent("/super/c2", "c2內容");
//		List<String> list = zkc.getChildren("/super");
//		for(String p : list){
//			System.out.println(p);
//			String rp = "/super/" + p;
//			String data = zkc.readData(rp);
//			System.out.println("節點爲：" + rp + "，內容爲: " + data);
//		}
		
		//3. 更新和判斷節點是否存在
//		zkc.writeData("/super/c1", "新內容");
//		System.out.println(zkc.readData("/super/c1"));
//		System.out.println(zkc.exists("/super/c1"));
		
		//4.遞歸刪除/super內容
//		zkc.deleteRecursive("/super");		
	}
}

subscribeChildChanges------只監控節點的新增/刪除,不監聽節點的更新

package bhz.zkclient.watcher;

import java.util.List;

import org.I0Itec.zkclient.IZkChildListener;
import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.ZkConnection;

public class ZkClientWatcher1 {

	/** zookeeper地址 */
	static final String CONNECT_ADDR = "192.168.1.171:2181,192.168.1.172:2181,192.168.1.173:2181";
	/** session超時時間 */
	static final int SESSION_OUTTIME = 5000;//ms 
	
	
	public static void main(String[] args) throws Exception {
		ZkClient zkc = new ZkClient(new ZkConnection(CONNECT_ADDR), 5000);
		
		//對父節點添加監聽子節點變化。
		zkc.subscribeChildChanges("/super", new IZkChildListener() {
			@Override
			public void handleChildChange(String parentPath, List<String> currentChilds) throws Exception {
				System.out.println("parentPath: " + parentPath);
				System.out.println("currentChilds: " + currentChilds);
			}
		});
		
		Thread.sleep(3000);
		
		zkc.createPersistent("/super");
		Thread.sleep(1000);
		
		zkc.createPersistent("/super" + "/" + "c1", "c1內容");
		Thread.sleep(1000);
		
		zkc.createPersistent("/super" + "/" + "c2", "c2內容");
		Thread.sleep(1000);		
		
		zkc.delete("/super/c2");
		Thread.sleep(1000);	
		
		zkc.deleteRecursive("/super");
		Thread.sleep(Integer.MAX_VALUE);
		
		
	}
}

subscribeDataChanges---------監聽修改和刪除

package bhz.zkclient.watcher;

import org.I0Itec.zkclient.IZkDataListener;
import org.I0Itec.zkclient.ZkClient;
import org.I0Itec.zkclient.ZkConnection;

public class ZkClientWatcher2 {

	/** zookeeper地址 */
	static final String CONNECT_ADDR = "192.168.1.171:2181,192.168.1.172:2181,192.168.1.173:2181";
	/** session超時時間 */
	static final int SESSION_OUTTIME = 5000;//ms 
	
	
	public static void main(String[] args) throws Exception {
		ZkClient zkc = new ZkClient(new ZkConnection(CONNECT_ADDR), 5000);
		
		zkc.createPersistent("/super", "1234");
		
		//對父節點添加監聽子節點變化。
		zkc.subscribeDataChanges("/super", new IZkDataListener() {
			@Override
			public void handleDataDeleted(String path) throws Exception {
				System.out.println("刪除的節點爲:" + path);
			}
			
			@Override
			public void handleDataChange(String path, Object data) throws Exception {
				System.out.println("變更的節點爲:" + path + ", 變更內容爲:" + data);
			}
		});
		
		Thread.sleep(3000);
		zkc.writeData("/super", "456", -1);
		Thread.sleep(1000);

		zkc.delete("/super");
		Thread.sleep(Integer.MAX_VALUE);
		
		
	}
}