Zookeeper在分布式命名服务中的实践

import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
 
public class ZookeeperDistributedNaming {
 
    private static final String CONNECTION_STRING = "127.0.0.1:2181";
    private static final int SESSION_TIMEOUT = 2000;
    private static final String SERVER_1 = "/server1";
    private static final String SERVER_2 = "/server2";
 
    public static void main(String[] args) {
        ZooKeeper zooKeeper = null;
        try {
            // 连接到Zookeeper服务器
            zooKeeper = new ZooKeeper(CONNECTION_STRING, SESSION_TIMEOUT, event -> {});
            
            // 创建临时节点
            String server1 = zooKeeper.create(SERVER_1, "Server1-data".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
            System.out.println("Server1 node created with path: " + server1);
            
            // 创建临时顺序节点
            String server2 = zooKeeper.create(SERVER_2, "Server2-data".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL);
            System.out.println("Server2 node created with path: " + server2);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (zooKeeper != null) {
                    zooKeeper.close();
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

这段代码展示了如何使用Zookeeper API在Zookeeper中创建临时节点。首先，我们连接到Zookeeper服务器，然后使用create方法创建节点，其中CreateMode.EPHEMERAL用于创建临时节点，CreateMode.EPHEMERAL_SEQUENTIAL用于创建临时顺序节点。在节点创建成功后，我们打印出它们的路径。最后，在操作完成后关闭Zookeeper连接。