Zookeeper

package zookeeper01;
import java.io.IOException;
import java.util.List;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
public class  {
	public static void main(String[] args) {
		try {
			test();
		} catch (IOException | KeeperException | InterruptedException e) {
			e.printStackTrace();
		}
	}
	public static void test() throws IOException, KeeperException, InterruptedException{
		ZooKeeper zk = new ZooKeeper("172.19.238.62", 500000, new Watcher() {
			
			public void process(WatchedEvent event) {
				
			}
		});
		//创建一个节点root，数据是mydata,不进行ACL权限控制，节点为永久性的(即客户端shutdown了也不会消失)
		zk.create("/root", "mydata".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
		//在root下面创建一个childone znode,数据为childone,不进行ACL权限控制，节点为永久性的
		zk.create("/root/childone", "childone".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
		zk.create("/root/childtwo", "childtwo".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
		//取得/root节点下的子节点名称,返回List<String>
		List<String> nodes = zk.getChildren("/root",true);
		for(String str : nodes){
			System.out.println("znode in root : " + str);
		}
		//取得/root/childone节点下的数据,返回byte[]
		byte[] data = zk.getData("/root/childone", true, null);
		System.out.println("/root/childone data : " + new String(data));
		//修改节点/root/childone下的数据，第三个参数为版本，如果是-1，那会无视被修改的数据版本，直接改掉
		zk.setData("/root/childone", "childmodify".getBytes(), -1);
		//删除/root/childone这个节点，第二个参数为版本，－1的话直接删除，无视版本
		zk.delete("/root/childone", -1);
		zk.delete("/root/childtwo", -1);
		zk.close();
	}
}