zookeeper使用demo（c#/java）

using System;
using ZooKeeperNet;
namespace ConsoleApplication1
{
    class Watcher : IWatcher
    {
        public void Process(WatchedEvent @event)
        {
            if (@event.Type == EventType.NodeDataChanged)
            {
                Console.WriteLine(@event.Path + "节点的值被修改");
            }

        }
    }
}

using System;
using System.Linq;
using System.Text;
using ZooKeeperNet;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建一个Zookeeper实例，第一个参数为目标服务器地址和端口，第二个参数为Session超时时间，第三个为节点变化时的回调方法 
            using (ZooKeeper zk = new ZooKeeper("127.0.0.1:2181", new TimeSpan(0, 0, 0, 10), new Watcher()))
            {
                String znode_root = "/dubbo/com.alibaba.dubbo.demo.SubDemoService/consumers";
                var stat = zk.Exists(znode_root, true);

                if (null == stat)
                {
                    //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(znode_root, "mydata".GetBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.Persistent);
                }
                else
                {
                    var data1 = zk.GetData(znode_root, true, null);
                    Console.WriteLine(znode_root + ":" + Encoding.Default.GetString(data1));
                }
                //在root下面创建一个child1 znode,数据为child1,不进行ACL权限控制，节点为永久性的 
                string c = zk.Create("/root/child1", "child1".GetBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.Persistent);
                Console.WriteLine(c);

                //取得/root节点下的子节点名称,返回List<String> 
                var childrenNodes = zk.GetChildren("/root", true);
                Console.WriteLine("子节点个数："+childrenNodes.Count());

                //取得/root/child1节点下的数据,返回byte[] 
                byte[] data = zk.GetData("/root/child1", true, null);
                Console.WriteLine("节点存储的数据："+Encoding.Default.GetString(data));

                //修改节点/root/child1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/child1", "child1modify".GetBytes(), -1);

                //删除/root/child1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/child1", -1);
            }

            Console.Read();
        }
    }
}

/dubbo/com.alibaba.dubbo.demo.SubDemoService/consumers:192.168.40.69
/root/child1
子节点个数：3
节点存储的数据：child1
节点的值被修改：/root/child1

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.6</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

import com.alibaba.fastjson.JSON;
import org.apache.zookeeper.*;
import org.apache.zookeeper.data.Stat;

import java.util.List;
import java.util.UUID;

public class ZkDemo {

    public static void main(String[] args) throws Exception {
        String host = "127.0.0.1:2181";
        int timeout = 1000;
        ZooKeeper zk = new ZooKeeper(host, timeout, new Watcher() {
            public void process(WatchedEvent watchedEvent) {
                if (watchedEvent.getType() == Event.EventType.NodeDataChanged) {
                    System.out.println(watchedEvent.getPath() + "节点的值被修改");
                }
            }
        });

        String znode_root = "/dubbo/com.alibaba.dubbo.demo.SubDemoService/consumers";
        Stat stat = zk.exists(znode_root, true);
        if (null == stat) {
            zk.create(znode_root, "mydata".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
            System.out.println(znode_root + "被创建");
        } else {
            byte[] data = zk.getData(znode_root, true, null);
            System.out.println(znode_root + ":" + new String(data));
        }

        if(zk.exists("/root/node2",true)==null) {
            //在root下面创建一个名为node2的znode,数据为node2val,不进行ACL权限控制，节点为永久性的
            zk.create("/root/node2", "node2val".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
        }

        //取得/root节点下的子节点名称,返回List<String>
        List<String> childrenNodes = zk.getChildren("/root", true);
        System.out.println(String.format("子节点（%s个）:%s", childrenNodes.size(), JSON.toJSONString(childrenNodes)));

        zk.setData("/root/node2", UUID.randomUUID().toString().getBytes(), -1);

        zk.close();

    }
}

/dubbo/com.alibaba.dubbo.demo.SubDemoService/consumers:192.168.40.69
子节点（2个）:["childone","node2"]
/root/node2节点的值被修改