setValue(count);
} catch (Exception e) {
e.printStackTrace();
}
}
};
service.submit(runnable);
}
service.shutdown();
service.awaitTermination(TIME, TimeUnit.SECONDS);
}
private synchronized void setValue(DistributedAtomicLong count) throws Exception {
System.out.println("-------------");
System.out.println("当前值=" + count.get().preValue());
long l = (long) (Math.random() * 1000);
System.out.println("尝试赋值:" + l);
AtomicValue result = count.trySet(l);
if (result.succeeded()) {
System.out.println(result.postValue() + "设置成功");
System.out.println(result.preValue() + "->" + result.postValue());
} else {
System.out.println(result.postValue() + "设置失败");
System.out.println("计数器仍是旧值:" + result.preValue());
}
}
private CuratorFramework initClient(String path) throws Exception {
CuratorFramework client = makeClient();
client.start();
boolean b = isPathExist(client, path);
//如果不存在这个路径，stat为null，创建新的节点路径。
if (!b) {
String s = client.create()
.creatingParentsIfNeeded()
.withMode(CreateMode.PERSISTENT)
.forPath(path);
System.out.println("创建 " + s);
} else {
System.out.println("已存在:" + path + ",不需重复创建");
}
return client;
}
//检测是否存在该路径。
private boolean isPathExist(CuratorFramework client, String path) {
boolean b = false;
//检测是否存在该路径。
try {
Stat stat = client.checkExists().forPath(path);
b = stat == null ? false : true;
} catch (Exception e) {
e.printStackTrace();
}
return b;
}
private CuratorFramework makeClient() {
RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 5);
CuratorFramework client = CuratorFrameworkFactory.builder()
.connectString(getAddress())
.sessionTimeoutMs(10 * 1000)
.connectionTimeoutMs(20 * 1000)
.retryPolicy(retryPolicy)
.build();
return client;
}
private String getAddress() {
String ip = "127.0.0.1";
return ip + ":2181," + ip + ":2182," + ip + ":2183";
}
}
输出：
创建 /path/count
当前值=3546358405553139250
尝试赋值:385
385设置成功
3546358405553139250->385
当前值=385
尝试赋值:161
161设置成功
385->161
当前值=161
尝试赋值:672
672设置成功
161->672
当前值=672
尝试赋值:299
299设置成功
672->299
当前值=299
尝试赋值:98
98设置成功
299->98
当前值=98
尝试赋值:53
53设置成功
98->53
当前值=53
尝试赋值:549
549设置成功
53->549
当前值=549
尝试赋值:869
869设置成功
549->869
当前值=869
尝试赋值:222
222设置成功
869->222
当前值=222 尝试赋值:522 522设置成功
