解决这个问题的方法是使用Curator的ConnectionStateListener接口来监听连接状态的改变。在重新连接的状态改变时,确保ConnectionStateListener被调用。
以下是一个示例代码,演示了如何使用ConnectionStateListener来监听连接状态的改变:
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.api.CuratorEvent;
import org.apache.curator.framework.api.CuratorEventType;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.curator.retry.RetryNTimes;
import org.apache.curator.utils.ZKPaths;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.Watcher.Event.KeeperState;
import org.apache.zookeeper.data.Stat;
public class CuratorConnectionListenerExample {
private static final String ZOOKEEPER_CONNECTION_STRING = "localhost:2181";
private static final String ZOOKEEPER_PATH = "/example/path";
public static void main(String[] args) throws Exception {
CuratorFramework client = createCuratorFramework();
client.getConnectionStateListenable().addListener((client1, newState) -> {
switch (newState) {
case CONNECTED:
System.out.println("Connected to ZooKeeper");
break;
case RECONNECTED:
System.out.println("Reconnected to ZooKeeper");
break;
case SUSPENDED:
System.out.println("Suspended connection to ZooKeeper");
break;
case LOST:
System.out.println("Lost connection to ZooKeeper");
break;
case READ_ONLY:
System.out.println("Read-only connection to ZooKeeper");
break;
default:
System.out.println("Unknown connection state: " + newState);
}
});
client.start();
// Perform operations on ZooKeeper
// ...
// Close the client when done
client.close();
}
private static CuratorFramework createCuratorFramework() {
return CuratorFrameworkFactory.builder()
.connectString(ZOOKEEPER_CONNECTION_STRING)
.retryPolicy(new ExponentialBackoffRetry(1000, 3))
.build();
}
}
在上述示例中,我们创建了一个CuratorFramework实例,并使用ConnectionStateListener接口来监听连接状态的改变。在连接状态发生变化时,我们通过ConnectionState参数来判断当前连接状态,并打印相应的日志信息。
注意,在使用Curator的连接状态监听器时,确保正确处理连接状态的所有可能情况,以便适应不同的连接状态变化。
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