java操作zookeeper java代码如下
package com.hf.zookeeper.noteManager; import org.apache.zookeeper.*; import java.io.IOException; /** * Description:zookeeper增加节点,修改节点,删除节点操作 * Created @version 1.0 2015/10/8 17:29 by xinghaifang */ public class zkNodeMananger { public static void main(String[] args) throws IOException, KeeperException, InterruptedException { // 创建一个与服务器的连接 ZooKeeper zk = new ZooKeeper("127.0.0.1:2181", 60000, new Watcher() { // 监控所有被触发的事件 public void process(WatchedEvent event) { System.out.println("EVENT:" + event.getType()); } }); // 查看根节点 System.out.println("ls / => " + zk.getChildren("/", true)); // 创建一个目录节点 if (zk.exists("/node", true) == null) { zk.create("/node", "conan".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); System.out.println("create /node conan"); // 查看/node节点数据 System.out.println("get /node => " + new String(zk.getData("/node", false, null))); // 查看根节点 System.out.println("ls / => " + zk.getChildren("/", true)); } // 创建一个子目录节点 if (zk.exists("/node/sub1", true) == null) { zk.create("/node/sub1", "sub1".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); System.out.println("create /node/sub1 sub1"); // 查看node节点 System.out.println("ls /node => " + zk.getChildren("/node", true)); } // 修改节点数据 if (zk.exists("/node", true) != null) { zk.setData("/node", "changed".getBytes(), -1); // 查看/node节点数据 System.out.println("get /node => " + new String(zk.getData("/node", false, null))); } // 删除节点 if (zk.exists("/node/sub1", true) != null) { zk.delete("/node/sub1", -1); zk.delete("/node", -1); // 查看根节点 System.out.println("ls / => " + zk.getChildren("/", true)); } // 关闭连接 zk.close(); } }我们使用了一个zookeeper服务器,他会自动同步到集群中的其他服务器。
<dependencies> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>zookeeper</artifactId> <version>3.4.6</version> <exclusions> <exclusion> <groupId>javax.jms</groupId> <artifactId>jms</artifactId> </exclusion> <exclusion> <groupId>com.sun.jdmk</groupId> <artifactId>jmxtools</artifactId> </exclusion> <exclusion> <groupId>com.sun.jmx</groupId> <artifactId>jmxri</artifactId> </exclusion> </exclusions> </dependency> </dependencies>