如何调用Java API来创建一个最基本的Zookerper
如何调用Java API来创建一个最基本的Zookerper ,针对这个问题,这篇文章详细介绍了相对应的分析和解答,希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
下面介绍如何调用 Java API来创建一个最基本的 Zookerper 会话实例
代码清单
import java.util.concurrent.CountDownLatch; import org.apache.zookeeper.WatchedEvent; import org.apache.zookeeper.Watcher; import org.apache.zookeeper.Watcher.Event.KeeperState; import org.apache.zookeeper.ZooKeeper; public class zookeeper_simple_usage implements Watcher { private static CountDownLatch connectedSemaphore = new CountDownLatch(1); public static void main (String[] args) throws Exception{ ZooKeeper zookeeper = new ZooKeeper("202.201.13.55:2100", 5000, new zookeeper_simple_usage()); System.out.println(zookeeper.getState()); try{ connectedSemaphore.await(); } catch (InterruptedException e){} System.out.println("ZooKeeper session established."); } public void process(WatchedEvent event) { System.out.println("Received watched evnet: " + event); if (KeeperState.SyncConnected == event.getState()) { connectedSemaphore.countDown(); } } }
必须重载 WatchedEvent
中的 process
方法。
执行结果
Received watched evnet: WatchedEvent state:SyncConnected type:None path:null ZooKeeper session established.
依赖包
需要在Build Path中添加四个包
zookerper-3.4.6.jar
log4j-1.2.14.jar
slf4j-api-1.7.12.jar
slf4j-simple-1.7.12.jar
不然会报找不到类的错误。
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