Redisson实现redis分布式锁

Redisson中的分布式锁

Redisson把这些工作都封装好了

     <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson</artifactId>
            <version>3.12.3</version>
        </dependency>

package com.msb.redis.config;

import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MyRedissonConfig {
    
    
    /**
     * 所有对Redisson的使用都是通过RedissonClient
     */
    @Bean(destroyMethod="shutdown")
    public RedissonClient redisson(){
    
    
        //1、创建配置
        Config config = new Config();
        config.useSingleServer().setAddress("redis://127.0.0.1:6379");

        //2、根据Config创建出RedissonClient实例
        RedissonClient redisson = Redisson.create(config);
        return redisson;
    }
}

package com.msb.redis.redisbase.adv;


import com.msb.redis.lock.rdl.RedisDistLockWithDog;
import org.junit.jupiter.api.Test;
import org.redisson.Redisson;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

@SpringBootTest
public class TestRedissionLock {
    
    

    private int count = 0;
    @Autowired
    private RedissonClient redisson;

    @Test
    public void testLockWithDog() throws InterruptedException {
    
    
        int clientCount =3;
        RLock lock = redisson.getLock("RD-lock");
        CountDownLatch countDownLatch = new CountDownLatch(clientCount);
        ExecutorService executorService = Executors.newFixedThreadPool(clientCount);
        for (int i = 0;i<clientCount;i++){
    
    
            executorService.execute(() -> {
    
    
                try {
    
    
                    lock.lock(10, TimeUnit.SECONDS);
                    System.out.println(Thread.currentThread().getName()+"准备进行累加。");
                    Thread.sleep(2000);
                    count++;
                } catch (InterruptedException e) {
    
    
                    e.printStackTrace();
                } finally {
    
    
                    lock.unlock();
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        System.out.println(count);
    }
}

https://github.com/redisson/redisson/

https://redisson.org/

锁过期时间不好评估怎么办？