若依集成redisson实现redis分布式锁

java 17

若依：3.8.9

maven仓库链接：https://central.sonatype.com/artifact/org.redisson/redisson

一、引入maven依赖

<dependency>
    <groupId>org.redisson</groupId>
    <artifactId>redisson</artifactId>
    <version>3.45.1</version>
</dependency>

二.添加工具类RedisLock.java

package com.ruoyi.common.core.redis;

import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.concurrent.TimeUnit;

/**
 * redis锁工具类
 *
 * @author ruoyi
 */
@Component
public class RedisLock
{
    @Autowired
    private RedissonClient redissonClient;

    /**
     * 获取锁
     *
     * @param lockKey 锁实例key
     * @return 锁信息
     */
    public RLock getRLock(String lockKey)
    {
        return redissonClient.getLock(lockKey);
    }

    /**
     * 加锁
     * 
     * @param lockKey 锁实例key
     * @return 锁信息
     */
    public RLock lock(String lockKey)
    {
        RLock lock = getRLock(lockKey);
        lock.lock();
        return lock;
    }

    /**
     * 加锁
     * 
     * @param lockKey 锁实例key
     * @param leaseTime 上锁后自动释放锁时间
     * @return true=成功；false=失败
     */
    public Boolean tryLock(String lockKey, long leaseTime)
    {
        return tryLock(lockKey, 0, leaseTime, TimeUnit.SECONDS);
    }

    /**
     * 加锁
     * 
     * @param lockKey 锁实例key
     * @param leaseTime 上锁后自动释放锁时间
     * @param unit 时间颗粒度
     * @return true=加锁成功；false=加锁失败
     */
    public Boolean tryLock(String lockKey, long leaseTime, TimeUnit unit)
    {
        return tryLock(lockKey, 0, leaseTime, unit);
    }

    /**
     * 加锁
     * 
     * @param lockKey 锁实例key
     * @param waitTime 最多等待时间
     * @param leaseTime 上锁后自动释放锁时间
     * @param unit 时间颗粒度
     * @return true=加锁成功；false=加锁失败
     */
    public Boolean tryLock(String lockKey, long waitTime, long leaseTime, TimeUnit unit)
    {
        RLock rLock = getRLock(lockKey);
        boolean tryLock = false;
        try
        {
            tryLock = rLock.tryLock(waitTime, leaseTime, unit);
        }
        catch (InterruptedException e)
        {
            return false;
        }
        return tryLock;
    }

    /**
     * 释放锁
     * 
     * @param lockKey 锁实例key
     */
    public void unlock(String lockKey)
    {
        RLock lock = getRLock(lockKey);
        lock.unlock();
    }

    /**
     * 释放锁
     * 
     * @param lock 锁信息
     */
    public void unlock(RLock lock)
    {
        lock.unlock();
    }
}

3、新增配置RedissonConfig.java

package com.aspire.datasynchron.framework.config;

import com.aspire.datasynchron.common.utils.StringUtils;
import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.redisson.config.SingleServerConfig;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * redisson配置
 *
 * @author ruoyi
 */
@Configuration
public class RedissonConfig {
    @Value("${spring.redis.host}")
    private String host;

    @Value("${spring.redis.port}")
    private String port;

    @Value("${spring.redis.password:}")  // 允许密码为空
    private String password;

    @Bean(destroyMethod = "shutdown")
    @ConditionalOnMissingBean(RedissonClient.class)
    public RedissonClient redissonClient() {
        Config config = new Config();
        String address = "redis://" + host + ":" + port;
        SingleServerConfig serverConfig = config.useSingleServer()
                .setAddress(address)
                .setDatabase(1);

        if (StringUtils.hasText(password)) {
            serverConfig.setPassword(password);
        }

        return Redisson.create(config);
    }
}

4、示例

@Slf4j
@Component("statisticalDataTask")
public class StatisticalDataTask {

    @Autowired
    private IStatisticalDataService statisticalDataService;
    // 引入RedisLock
    @Autowired
    private RedisLock redisLock;

    /*
     * 轮询所有上游接口获取数据并保存到数据库中并加密
     */
    public void rollPoling() {
        String lockKey = "statisticalDataLock:" + "rollPoling";
        RLock rLock = redisLock.getRLock(lockKey);
        try {
            // 尝试获取锁，等待时间为 3 秒，锁超时时间为 100 秒
            if (rLock.tryLock(3, 100, TimeUnit.SECONDS)) {
                try {
                    log.info("轮询所有上游接口定时任务开始执行");
                    statisticalDataService.rollPoling();
                    log.info("轮询所有上游接口定时任务执行结束");
                } finally {
                    // 确保在完成后释放锁
                    if (rLock.isHeldByCurrentThread()) {
                        rLock.unlock();
                    }
                }
            } else {
                log.error("轮询所有上游接口定时任务, 获取锁失败");
            }
        } catch (Exception e) {
            log.error("轮询所有上游接口定时任务执行异常：{}", e);
        }
    }
}

参考文献：https://blog.csdn.net/weixin_56404155/article/details/145880379