java zookeeper读取节点

最新推荐文章于 2022-04-05 22:27:37 发布

原创最新推荐文章于 2022-04-05 22:27:37 发布 · 4k 阅读

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本文提供了一个使用 Java 进行 ZooKeeper 客户端编程的基本示例，展示了如何连接到 ZooKeeper 服务器、定义 Watcher 监听器并获取指定路径下的子节点列表。

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import java.io.IOException;
import java.util.List;

import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;

public class ZKTest {

    public static void main(String[] args) {
        String connectString = "127.0.0.1:2181";
        int sessionTimeout = 4000;
        Watcher watcher = new Watcher() {
            public void process(WatchedEvent event) {
                //System.out.println(event.getPath());
            }
        };

        try {
            ZooKeeper zooKeeper = new ZooKeeper(connectString, sessionTimeout, watcher);
            List<String> list = zooKeeper.getChildren("/dubbo", false);
            for (String path : list) {
                System.out.println(path);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (KeeperException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}