1 public class CauratorClientTest {
 2     
 3     //链接地址
 4     private static  String zkhost="172.19.27.246:2181";
 5     //sessionTimeoutMs会话超时时间，单位为毫秒。默认是60000ms
 6     private static  int  sessionTimeoutMs=5000;
 7     //connectionTimeoutMs连接创建超时时间，单位毫秒，默认15000ms
 8     private static  int connectionTimeOutMs=3000;
 9     //重连策略
10     private static  int maxRetries;
11     //    zookeeper连接间隔时间基数
12     private static int baseSleepTimeMs=1000;
13     //系统域dev,qa,pro
14     private static String domain="dev";
15     
16     
17     /**
18  * 数据节点被改变的事件。能监听节点存储的数据发生变化，和节点被删除的事件。
19  * 节点被删除后，会调用回调方法。
20  */
21 public static void testNodeChangeEvent() throws Exception{
22     CuratorFramework client = CuratorFrameworkFactory.newClient(zkhost,sessionTimeoutMs,connectionTimeOutMs, new ExponentialBackoffRetry(baseSleepTimeMs,maxRetries));
23     client.start();
24     
25     String path=client.create().creatingParentContainersIfNeeded().withMode(CreateMode.EPHEMERAL).forPath("/dev/sxf/cd","sxf".getBytes());
26     
27     NodeCache nodeCache=new NodeCache(client,path);
28     
29     /**
30      * 注册数据节点中存储的数据被改变的事件
31      */
32     nodeCache.getListenable().addListener(new NodeCacheListener() {
33         /**
34          * 数据节点变化事件
35          */
36         @Override
37         public void nodeChanged() throws Exception {
38             
39             ChildData data=http://www.mamicode.com/nodeCache.getCurrentData();
40             if(data=http://www.mamicode.com/=null){
41                 System.out.println("节点被删除");
42                 return;
43             }
44             
45             Stat  stat=data.getStat();
46             
47             int a=stat.getNumChildren();
48             
49             System.out.println("子节点的个数为==>"+a);
50             
51             System.out.println("节点数据被改变改变后的数值为==>"+new String(nodeCache.getCurrentData().getData()));
52             
53         }
54     });
55     
56     nodeCache.start();
57     
58     
59     //当前线程休眠几秒
60     Thread.sleep(10000L);
61     
62     
63     client.setData().forPath("/dev/sxf/cd","中国人民解放军".getBytes());
64     
65     
66     //当前线程休眠几秒
67     Thread.sleep(10000L);
68     client.setData().forPath("/dev/sxf/cd","第二次改变".getBytes());
69     
70     
71     //当前线程休眠几秒
72     Thread.sleep(10000L);
73     client.delete().forPath("/dev/sxf/cd");
74     
75     
76     
77     Thread.sleep(100000L);
78     
79 }
80 
81 }