zookeeper之java API使用
public static void main(String[] args) {
try {
zooKeeper = new ZooKeeper(“192.168.40.135:2181”, 5000, new Watcher() {
public void process(WatchedEvent watchedEvent) {
if (watchedEvent.getState() == Event.KeeperState.SyncConnected) {
doSomeThing();
}
}
});
System.out.println(“state:{}” + zooKeeper.getState());
Thread.sleep(Integer.MAX_VALUE);
}
catch (IOException e) {
System.out.println(“connect zk failed”);
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
private static void doSomeThing() {
zooKeeper.create(“/node_5”, “123”.getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT, new IStringClassback(), “异步创建”);
}
//异步调用，需要 一个回调函数
static class IStringClassback implements AsyncCallback.StringCallback {
/**
-
@param rc 返回码，如果异步创建成功，返回0
-
@param path 创建节点的完整路径
-
@param ctx 异步调用的上下文，。。也就是上面传下来的“创建”字符串
-
@param name 服务端返回的已经创建节点的真实路径，如果是顺序节点，那么和path不一致
*/
public void processResult(int rc, String path, Object ctx, String name) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(“rc=” + rc).append(“\n”);
stringBuilder.append(“path=” + path).append(“\n”);
stringBuilder.append(“ctx=” + ctx).append(“\n”);
stringBuilder.append(“name=” + name).append(“\n”);
System.out.println(stringBuilder.toString());
}
}
}