使用zookeeper的java API操作zookeeper集群--maven项目

maven项目，纯java api 使用zookeeper集群

//pom.xml


    4.0.0

    com.dddd
    maventest
    1.0

    
        
            org.apache.zookeeper
            zookeeper
            
            3.4.13
        
    

    
        
            
                org.apache.maven.plugins
                maven-compiler-plugin
                3.8.0
                
                    1.8
                    1.8
                
            
        
    

//Test.java
import org.apache.log4j.BasicConfigurator;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;

import java.util.List;
import java.util.concurrent.CountDownLatch;

public class Test {

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

        //quick log4j config
        BasicConfigurator.configure();

        ZkWatcher zkWatcher = new ZkWatcher();
        Stat stat = new Stat();
        // zookeeper conn is async, so wait to trigger the watcher
        ZooKeeper zk = new ZooKeeper("192.168.11.131:2181", 3000, zkWatcher);
        zkWatcher.waitToConn();

        System.out.println(zk.getState());

        String path = "/";
        List children = zk.getChildren(path,null);
        for(String child:children){
            System.out.println("find "+child+" :");
            System.out.println("   "+new String(zk.getData(path+child,true,stat)));
        }

        zk.close();
    }
}

class ZkWatcher implements Watcher{
    private static CountDownLatch connectedSemaphore = new CountDownLatch(1);

    @Override
    public void process(WatchedEvent watchedEvent) {
        if (Event.KeeperState.SyncConnected == watchedEvent.getState()){
            connectedSemaphore.countDown();
        }
    }

    public void waitToConn() throws Exception{
        connectedSemaphore.await();
    }
}