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maven项目,纯java api 使用zookeeper集群
//pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.dddd</groupId>
<artifactId>maventest</artifactId>
<version>1.0</version>
<dependencies>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<!-- same version with the zookeeper-->
<version>3.4.13</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
//Test.java
import org.apache.log4j.BasicConfigurator;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import java.util.List;
import java.util.concurrent.CountDownLatch;
public class Test {
public static void main(String[] args) throws Exception{
//quick log4j config
BasicConfigurator.configure();
ZkWatcher zkWatcher = new ZkWatcher();
Stat stat = new Stat();
// zookeeper conn is async, so wait to trigger the watcher
ZooKeeper zk = new ZooKeeper("192.168.11.131:2181", 3000, zkWatcher);
zkWatcher.waitToConn();
System.out.println(zk.getState());
String path = "/";
List<String> children = zk.getChildren(path,null);
for(String child:children){
System.out.println("find "+child+" :");
System.out.println(" "+new String(zk.getData(path+child,true,stat)));
}
zk.close();
}
}
class ZkWatcher implements Watcher{
private static CountDownLatch connectedSemaphore = new CountDownLatch(1);
@Override
public void process(WatchedEvent watchedEvent) {
if (Event.KeeperState.SyncConnected == watchedEvent.getState()){
connectedSemaphore.countDown();
}
}
public void waitToConn() throws Exception{
connectedSemaphore.await();
}
}