zookeeper知识点三(删除节点)

最新推荐文章于 2025-10-27 10:08:59 发布

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本文档展示了如何使用Zookeeper的Java API进行节点删除操作。`DeleteNodeSync`类实现了`Watcher`接口，通过`ZooKeeper`实例连接到服务器，并在连接成功后删除指定节点`/node_1`。`process`方法处理接收到的事件，当连接状态为`SyncConnected`且事件类型为`None`时执行删除操作。

public class DeleteNodeSync implements Watcher{


    private static ZooKeeper zooKeeper;
   public static void main(String[] args) throws IOException, InterruptedException, KeeperException {
       zooKeeper = new ZooKeeper("127.0.0.1:2181",5000,new DeleteNodeSync());
       System.out.println(zooKeeper.getState().toString());
       Thread.sleep(Integer.MAX_VALUE);

   }

   private void doSomething(ZooKeeper zooKeeper){
       try {
           zooKeeper.delete("/node_1", -1);
       } catch (InterruptedException e) {
           e.printStackTrace();
       } catch (KeeperException e) {
           e.printStackTrace();
       }
   }

   @Override
   public void process(WatchedEvent event) {
       System.out.println("事件状态:" + event.getState() +",事件类型:" + event.getType() +",事件涉及路径:" + event.getPath());
       if (event.getState()==KeeperState.SyncConnected){
           if (event.getType()==EventType.None && null==event.getPath()){
               doSomething(zooKeeper);
           }
       }
   }

}