Springboot + zookepper Demo

一、 引入 maven 依赖包， 因为会报有包冲突，所以去掉了slf4j

    <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.7.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-reload4j</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

二、创建 Zookeeper 客户端的 Bean

import lombok.extern.slf4j.Slf4j;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.io.IOException;
import java.util.concurrent.CountDownLatch;

@Configuration
@Slf4j
public class ZkClient {

    @Value("${zk.hostAddr}")
    private String zkHostAddr;

    @Value("${zk.session.timeout:5000}")
    private Integer sessionTimeOut;

    @Bean
    public ZooKeeper zkCli() throws IOException, InterruptedException {
        final CountDownLatch countDownLatch = new CountDownLatch(1);
        ZooKeeper zookeeper = new ZooKeeper(zkHostAddr,sessionTimeOut,watchedEvent -> {
            if(watchedEvent.getState() == Watcher.Event.KeeperState.SyncConnected &&
                    watchedEvent.getType() == Watcher.Event.EventType.None) {
                log.info(" 连接成功");
                countDownLatch.countDown();
            }
        } );
        log.info("连接中...");
        countDownLatch.await();
        return zookeeper;
    }
}

三、 进行创建操作，获取、修改操作

import lombok.extern.slf4j.Slf4j;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.ZooDefs;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
@Slf4j
public class ZkOpera {

    @Autowired
    private ZooKeeper zkCli;

    public void createnode() {
        try {
            String path = zkCli.create("/sprboot_node", "hello world".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
            log.info("created path:{}", path);
        } catch (KeeperException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }


    public void modifyNode() throws InterruptedException, KeeperException {
        Stat stat = new Stat();
        byte [] data = zkCli.getData("/sprboot_node", false, stat);
        log.info("修改前数据：{}", new String(data));

        zkCli.setData("/sprboot_node","hello doug".getBytes(), stat.getVersion() );

        byte [] dataAft = zkCli.getData("/sprboot_node", false, stat);
        log.info("修改后数据：{}", new String(dataAft));

    }

}

四、 执行验证

创建： 验证 createnode() 方法

 

 修改： 验证 modifyNode() 方法