Zookeeper 在Windows下的安裝過程及測試

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1. 安裝jdk
2. 安裝Zookeeper. 在https://archive.apache.org/dist/zookeeper/下載對應版本（測試使用的是zookeeper-3.4.6版本）
3. 解壓zookeeper-3.4.6至F:\qsf\zookeeper\zookeeper-3.4.6
4. 在F:\qsf\zookeeper\ 新建data及log目錄

5. ZooKeeper的安裝模式分爲三種，分別爲：單機模式（stand-alone）、集羣模式和集羣僞分佈模式。ZooKeeper 單機模式的安裝相對比較簡單，如果第一次接觸ZooKeeper的話，建議安裝ZooKeeper單機模式或者集羣僞分佈模式。

6. 安裝單擊模式。 至F:\qsf\zookeeper\zookeeper-3.4.6\conf 複製 zoo_sample.cfg 並粘貼到當前目錄下，命名zoo.cfg.

7. 編輯zoo.cfg.修改如下配置 

   # The number of milliseconds of each tick
   tickTime=2000
   # The number of ticks that the initial 
   # synchronization phase can take
   initLimit=10
   # The number of ticks that can pass between 
   # sending a request and getting an acknowledgement
   syncLimit=5
   # the directory where the snapshot is stored.
   # do not use /tmp for storage, /tmp here is just 
   # example sakes.
   dataDir=F:\\qsf\\zookeeper\\data
   dataLogDir=F:\\qsf\\zookeeper\\data
   # the port at which the clients will connect
   clientPort=2181
   # the maximum number of client connections.
   # increase this if you need to handle more clients
   #maxClientCnxns=60
   #
   # Be sure to read the maintenance section of the 
   # administrator guide before turning on autopurge.
   #
   # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
   #
   # The number of snapshots to retain in dataDir
   #autopurge.snapRetainCount=3
   # Purge task interval in hours
   # Set to "0" to disable auto purge feature
   #autopurge.purgeInterval=1dataDir=F:\qsf\zookeeper\data
   dataLogDir=F:\qsf\zookeeper\data

8. cmd命令下進入F:\qsf\zookeeper\zookeeper-3.4.6\\bin目錄下運行zkserver.cmd.如下圖所示：
   
9. 運行zkcli.cmd.如下圖所示： 
   
10. 之後在搭建集羣模式和集羣僞分佈模式

package com.demo;

import java.io.IOException;

import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooDefs;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;

public class ZooKeeperTest {

	public static void main(String[] args) throws IOException, KeeperException, InterruptedException {
		ZooKeeper zk = new ZooKeeper("127.0.0.1:2181", 30000, new TestWatcher());
		String node = "/node";
		Stat stat = zk.exists(node, false);
		
		if(null==stat) {
			//創建節點
			String createResult = zk.create(node, "test".getBytes(), ZooDefs.Ids.CREATOR_ALL_ACL, CreateMode.PERSISTENT);
			System.out.println(createResult);
		}
		byte[] data = zk.getData(node, false, stat);
		System.out.println(new String(data));
		zk.close();
		
	}
	
}

class TestWatcher implements Watcher{

	@Override
	public void process(WatchedEvent event) {
		// TODO Auto-generated method stub
		System.out.println("*****************************");
		System.out.println("path:  " + event.getPath());
		System.out.println("type:  " + event.getType());
		System.out.println("state:  " + event.getState());
		System.out.println("*****************************");
	}
	
}