Zookeeper叢集Java操作（zookeeper3.4.5）

標籤：java操作zk叢集   zookeeper叢集java操作   

1.zk叢集java簡單操作1.0 包目錄結構lib取自zookpeeper官方壓縮包（基於zk3.4.5測試通過）

1.1 AbstractZooKeeper.java

package com.ccy.zk;import java.io.IOException;import java.util.concurrent.CountDownLatch;import org.apache.log4j.Logger;import org.apache.zookeeper.WatchedEvent;import org.apache.zookeeper.Watcher;import org.apache.zookeeper.Watcher.Event.KeeperState;import org.apache.zookeeper.ZooKeeper;/** *  * <p>  * Title: AbstractZooKeeper.java  * Package com.ccy.zk  * </p> * <p> * Description: TODO * <p> * @author Tom.Cai * @created 2015-4-13 下午9:48:50  * @version V1.0  * */public class AbstractZooKeeper implements Watcher {  protected Logger logger = Logger.getLogger(AbstractZooKeeper.class);       //緩衝時間       private static final int SESSION_TIME   = 2000;          protected ZooKeeper zooKeeper;       protected CountDownLatch countDownLatch=new CountDownLatch(1);         //串連zk叢集     public void connect(String hosts) throws IOException, InterruptedException{                 zooKeeper = new ZooKeeper(hosts,SESSION_TIME,this);                 countDownLatch.await();           }          //zk處理    @Override      public void process(WatchedEvent event) {          if(event.getState()==KeeperState.SyncConnected){              countDownLatch.countDown();          }      }           //關閉叢集    public void close() throws InterruptedException{             zooKeeper.close();         }    } 

1.2 ZooKeeperOperator.java(測試類別)

package com.ccy.zk;import java.util.List;import org.apache.log4j.Logger;import org.apache.zookeeper.CreateMode;import org.apache.zookeeper.KeeperException;import org.apache.zookeeper.ZooDefs.Ids;import org.apache.zookeeper.data.Stat;/** *  * <p>  * Title: ZooKeeperOperator.java  * Package com.ccy.zk  * </p> * <p> * Description: TODO * <p> * @author Tom.Cai * @created 2015-4-13 下午9:49:00  * @version V1.0  * */public class ZooKeeperOperator extends AbstractZooKeeper {private static Logger logger = Logger.getLogger(ZooKeeperOperator.class); /** *  *建立znode * */public void create(String path,byte[] data)throws KeeperException, InterruptedException{/** * 此處採用的是建立的是持久化節點：PERSISTENT表示不會因串連的斷裂而刪除節點 * EPHEMERAL 表示The znode will be deleted upon the client's disconnect. */ this.zooKeeper.create(path, data, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);}/** *  *擷取節點資訊 * */public void getChild(String path) throws KeeperException, InterruptedException{   try{List<String> list=this.zooKeeper.getChildren(path, false);if(list.isEmpty()){logger.info(path+"中沒有節點");System.out.println(path+"中沒有節點");}else{for(String child:list){System.out.println("節點："+child);}}}catch (KeeperException.NoNodeException e) {// TODO: handle exception throw e;   }}/** *  *擷取節點資料 * */public byte[] getData(String path) throws KeeperException, InterruptedException {           return  this.zooKeeper.getData(path, false,null);       }  /** * 修改節點資料 */public Stat setDate(String path,byte[] data,int version) throws KeeperException, InterruptedException{return this.zooKeeper.setData(path, data, version);}/** * 刪除節點 */public void deleteNode(final String path,int version) throws InterruptedException, KeeperException{ this.zooKeeper.delete(path, version);} public static void main(String[] args) { try {               ZooKeeperOperator zkoperator = new ZooKeeperOperator();               zkoperator.connect("192.168.80.100");                        //操作1：建立一個持久化節點            //zkoperator.create("/test1", "zk".getBytes());            //zkoperator.create("/test1/test11", "zk".getBytes());            //zkoperator.create("/test1/test12", "zk".getBytes());                        //操作2：取出原有的節點            //byte[] b = zkoperator.getData("/test1");            //System.out.println(new String(b));                        //操作3：設定節點資料            //zkoperator.setDate("/test1", "zk1".getBytes(), 1);                                    //操作4：刪除節點操作            zkoperator.deleteNode("/test1/test12", 0);                        //擷取子節點           // zkoperator.getChild("/test1");                                   zkoperator.close();                                   } catch (Exception e) {               e.printStackTrace();           }   }}

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Zookeeper叢集Java操作（zookeeper3.4.5）