利用Java api监视zookeeper集群
时间: 2024-02-01 18:39:26 浏览: 23
要监视zookeeper集群,可以使用zookeeper自带的四字命令或者使用zookeeper的Java api。以下是使用Java api监视zookeeper集群的示例代码:
```java
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;
import org.apache.zookeeper.data.Stat;
public class ZookeeperMonitor implements Watcher {
private static final int SESSION_TIMEOUT = 5000;
private ZooKeeper zk;
public void connect(String hosts) throws IOException, InterruptedException {
zk = new ZooKeeper(hosts, SESSION_TIMEOUT, this);
}
public void close() throws InterruptedException {
zk.close();
}
public void process(WatchedEvent event) {
System.out.println("Event received: " + event.toString());
}
public void monitorChildren(String path) throws KeeperException, InterruptedException {
List<String> children = zk.getChildren(path, true);
for (String child : children) {
String childPath = path + "/" + child;
Stat stat = zk.exists(childPath, true);
if (stat != null) {
System.out.println("Node " + childPath + " version: " + stat.getVersion());
}
monitorChildren(childPath);
}
}
public static void main(String[] args) throws Exception {
ZookeeperMonitor monitor = new ZookeeperMonitor();
monitor.connect("localhost:2181");
monitor.monitorChildren("/");
monitor.close();
}
}
```
在上面的代码中,我们首先连接到zookeeper集群,并使用监视器监视zookeeper节点。然后,我们递归遍历节点树,并对每个节点的版本号进行监视。这样,我们就可以监视整个zookeeper集群并及时发现问题。