JAvaリンクzookeeper
4926 ワード
サーバー通信やプラットフォーム間通信でzookeeperというものに遭遇します.zookeeperとは何ですか.google it!
これをテストするためには、zookeeperの仕組みを理解しなければならないので、zookeeperの一般的な使い方を整理して理解しやすく、より良いテストをしました~~
これをテストするためには、zookeeperの仕組みを理解しなければならないので、zookeeperの一般的な使い方を整理して理解しやすく、より良いテストをしました~~
package com.kiven.test;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.Watcher.Event.KeeperState;
public class Demo implements Watcher {
//
private static final int SESSION_TIME = 2000;
protected ZooKeeper zooKeeper;
protected CountDownLatch countDownLatch= new CountDownLatch(1);
public void connect(String hosts) throws IOException, InterruptedException{
zooKeeper = new ZooKeeper(hosts, SESSION_TIME, this);
countDownLatch.await();
}
/* (non-Javadoc)
* @see org.apache.zookeeper.Watcher#process(org.apache.zookeeper.WatchedEvent)
*/
public void process(WatchedEvent event) {
// TODO Auto-generated method stub
if(event.getState()==KeeperState. SyncConnected){
countDownLatch.countDown();
}
}
public void close() throws InterruptedException{
zooKeeper.close();
}
}
=================================================================================================================================
package com.kiven.test;
import java.util.List;
import org.apache.log4j.PropertyConfigurator;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.ZooDefs.Ids;
public class MyTest extends Demo{
/**
*
* function: znode, . /parent/child , /parent.
*@author cuiran
*@createDate 2013 -01 -16 15:08:38
*@param path
*@param data
*@throws KeeperException
*@throws InterruptedException
*/
public void create(String path, byte[] data) throws KeeperException, InterruptedException{
/**
* CreateMode PERSISTENT The znode will not be automatically deleted upon client's disconnect.
* EPHEMERAL The znode will be deleted upon the client's disconnect.
*/
this. zooKeeper.create(path, data, Ids. OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
}
/**
*
* function:
*@author cuiran
*@createDate 2013 -01 -16 15:17:22
*@param path
*@throws KeeperException
*@throws InterruptedException
*/
public void getChild(String path) throws KeeperException, InterruptedException{
try{
List list= this. zooKeeper.getChildren(path, false);
if(list.isEmpty()){
System. out.println(path+ " " );
} else{
System. out.println(path+ " " );
for(String child:list){
System. out.println( " :"+child);
}
}
} catch (KeeperException.NoNodeException e) {
// TODO: handle exception
throw e;
}
}
public byte[] getData(String path) throws KeeperException, InterruptedException {
return this. zooKeeper.getData(path, false, null);
}
public static void main(String args[]){
PropertyConfigurator. configure("log4j.properties");
try {
MyTest zkoperator = new MyTest();
zkoperator.connect( "172.16.3.9");
// byte[] data = new byte[]{'a','b','c','d'};
// zkoperator.create("/root",null);
// System.out.println(Arrays.toString(zkoperator.getData("/root")));
//
// zkoperator.create("/root/child1",data);
// System.out.println(Arrays.toString(zkoperator.getData("/root/child1")));
//
// zkoperator.create("/root/child2",data);
// System.out.println(Arrays.toString(zkoperator.getData("/root/child2")));
String zktest= "ZooKeeper Java API " ;
zkoperator.create( "/test", zktest.getBytes());
zkoperator.create( "/test/test1", zktest.getBytes());
System. out.println( " :" +new String(zkoperator.getData("/test" )));
System. out.println( " :" );
zkoperator.getChild( "/test");
zkoperator.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}