kaola4549 发表于 2019-1-8 13:21:16

Curator 对Zookeeper客户端的操作

import java.util.List;  

  
import org.apache.curator.RetryPolicy;
  
import org.apache.curator.framework.CuratorFramework;
  
import org.apache.curator.framework.CuratorFrameworkFactory;
  
import org.apache.curator.framework.recipes.cache.NodeCache;
  
import org.apache.curator.framework.recipes.cache.NodeCacheListener;
  
import org.apache.curator.framework.recipes.cache.PathChildrenCache;
  
import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent;
  
import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent.Type;
  
import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener;
  
import org.apache.curator.retry.ExponentialBackoffRetry;
  
import org.apache.zookeeper.CreateMode;
  
import org.apache.zookeeper.data.Stat;
  

  
public class CuratorClient {
  private static String HOST = "192.168.100.108:2181,192.168.100.110:2181,192.168.100.111:2181";
  private static String PATH = "/curzk";
  private static String CHILDPATH = "/curzk/1";
  public CuratorClient(){
  }
  public static void main(String[] args) throws Exception {
  RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
  CuratorFramework client = CuratorFrameworkFactory
  .builder().connectString(HOST)
  .sessionTimeoutMs(5000)
  .connectionTimeoutMs(5000)
  .retryPolicy(retryPolicy)
  .build();
  client.start();
  //创建
  try {
  String cpath = client.create().creatingParentsIfNeeded().withMode(CreateMode.PERSISTENT).forPath(CHILDPATH, "123".getBytes());
  System.out.println(cpath);
  } catch (Exception e) {
  e.printStackTrace();
  }
  //子节点
  List strList = client.getChildren().forPath(PATH);
  for(String str : strList){
  System.out.println(str);
  }
  //获取节点内容
  byte[] b = client.getData().forPath(CHILDPATH);
  System.out.println(new String(b));
  //修改节点内容
  client.setData().forPath(CHILDPATH, "abc".getBytes());
  //判断节点是否存在
  Stat s = client.checkExists().forPath(PATH);
  if(s!=null){
  System.out.println("存在");
  }else {
  System.out.println("不存在");
  }
  //监听主节点
  final NodeCache nodeCache = new NodeCache(client, PATH);
  nodeCache.start();
  nodeCache.getListenable().addListener(new NodeCacheListener() {
  @Override
  public void nodeChanged() throws Exception {
  byte[] b = nodeCache.getCurrentData().getData();
  System.out.println("主节点内容变化:"+new String(b));
  }
  });
  //监听子节点
  final PathChildrenCache pcc = new PathChildrenCache(client, PATH, true);
  pcc.start();
  pcc.getListenable().addListener(new PathChildrenCacheListener() {
  @Override
  public void childEvent(CuratorFramework client, PathChildrenCacheEvent event)
  throws Exception {
  if(event.getType()==Type.CHILD_ADDED){
  System.out.println("CHILD_ADDED:"+new String(event.getData().getData()));
  }else if(event.getType()==Type.CHILD_UPDATED){
  System.out.println("CHILD_UPDATED:"+new String(event.getData().getData()));
  }else if(event.getType()==Type.CHILD_REMOVED){
  System.out.println("CHILD_REMOVED:"+new String(event.getData().getData()));
  }
  }
  });
  client.setData().forPath(CHILDPATH, "abcDE".getBytes());
  Thread.sleep(Integer.MAX_VALUE);
  }
  
}


页: [1]
查看完整版本: Curator 对Zookeeper客户端的操作