Zookeeper分布式秒杀锁

2022年2月23日23:28:59 发表评论 129 views

package MiaoSha;

import org.apache.curator.CuratorConnectionLossException;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.locks.InterProcessLock;
import org.apache.curator.framework.recipes.locks.InterProcessMutex;
import org.apache.curator.retry.ExponentialBackoffRetry;

/**
 * 缺点:速度有点慢
 * 不会出现写三台计只有两台机存活二报错的问题
 */
public class TestDistributedLock {
    //10个共享资源
    private static int count = 100;
    public static void main(String[] args) {
        //等待时长,重试次数
        ExponentialBackoffRetry retry = new ExponentialBackoffRetry(1000, 10);

        CuratorFramework client = CuratorFrameworkFactory.builder()
                .connectString("bigdata166:2181,bigdata167:2181,bigdata168:2181")
                .retryPolicy(retry)
                .build();
        //客户端启动
        client.start();
        //创建锁 节点自动创建
        InterProcessMutex lock = new InterProcessMutex(client, "/mylock");

        //测试线程
        for (int i = 0; i < 100; i++) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    try {
                        lock.acquire();
                        printCountNumber();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }finally {
                        try {
                            lock.release();
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                }
            }).start();
        }

    }

    private static void printCountNumber() throws InterruptedException {
        System.out.println("==========="+Thread.currentThread().getName()+"==============");
        System.out.println("当前共享资源的数量为:"+count);
        count--;
//        Thread.sleep(12);
        System.out.println("==========="+Thread.currentThread().getName()+"==============");
    }
}


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