分布式协调与配置管理：Zookeeper的实践案例

import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
 
public class ZookeeperPractice {
    private static final String CONNECTION_STRING = "localhost:2181";
    private static final int SESSION_TIMEOUT = 2000;
    private ZooKeeper zookeeper;
 
    public ZookeeperPractice() throws Exception {
        zookeeper = new ZooKeeper(CONNECTION_STRING, SESSION_TIMEOUT, event -> {});
    }
 
    public void createNode(String path, String data) throws Exception {
        String result = zookeeper.create(path, data.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
        System.out.println("Node created with path: " + result);
    }
 
    public void getNodeData(String path) throws Exception {
        byte[] data = zookeeper.getData(path, false, null);
        System.out.println("Data for node: " + new String(data));
    }
 
    public static void main(String[] args) {
        try {
            ZookeeperPractice practice = new ZookeeperPractice();
            practice.createNode("/myapp/myservice", "mydata");
            practice.getNodeData("/myapp/myservice");
            // 更多操作...
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

这段代码展示了如何使用Zookeeper API创建一个节点并存储数据，以及如何获取该节点的数据。在实际应用中，你需要处理Zookeeper会话的建立、断开连接和异常处理。此外，你还应该实现监听器来响应Zookeeper中节点的变化。