ZooKeeper API实战创建客户端

package com.yqq.zookeeper.curd;

import org.apache.log4j.Logger;
import org.apache.zookeeper.*;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

/**
 * @Author yqq
 * @Date 2021/10/24 00:25
 * @Version 1.0
 */
public class ZKCurd {
    //定义会话的超时时间
    private final static int SESSION_TIME = 30000;
    //定义zk集群的ip地址
    private final static String ZK_SERVERS = "192.168.134.102:2181,192.168.134.103:2181,192.168.134.104:2181";
    //日志对象
    private final static Logger LOGGER = Logger.getLogger(ZKCurd.class);
    private ZooKeeper zooKeeper = null;
    private Watcher watcher = new Watcher() {
        @Override
        public void process(WatchedEvent watchedEvent) {
            LOGGER.info("event:"+watchedEvent.toString());
        }
    };
    @Before
    public void connect() throws IOException {
        zooKeeper = new ZooKeeper(ZK_SERVERS,SESSION_TIME,watcher);
        //获取当前的会话sessionID
        Long sessionId = zooKeeper.getSessionId();
        LOGGER.info("sessionId:"+sessionId);
        System.out.println("zookeeper:"+zooKeeper);
    }
    @After
    public void close() throws InterruptedException {
        zooKeeper.close();
    }
    /**
     * 创建节点
     * final String path:要创建的节点的全路径
     * byte data[]:节点中数据内容
     * List<ACL> acl:节点权限
     * CreateModel createModel:节点类型
     * *PERSISTENT:普通持久节点
     * *PERSISTENT_SEQUENTIAL:普通临时持久节点
     * *EPHEMERAL:普通临时节点
     * *EPHEMERAL_SEQUENTIAL:普通临时有序节点
     */
    @Test
    public void create() {
        String result = null;
        try {
//            result = zooKeeper.create("/James","good nice".getBytes(StandardCharsets.UTF_8),
//                    ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
            result = zooKeeper.create("/JamesLLL","good nice".getBytes(StandardCharsets.UTF_8),
                    ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
        } catch (Exception e) {
            LOGGER.error(e.getMessage());
            Assert.fail();
        }
        LOGGER.info("create result:{"+result+"}");
    }
}