long-article-manage/long-article-server/src/main/java/com/tzld/piaoquan/longarticle/component/RedisLock.java

package com.tzld.piaoquan.longarticle.component;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;

import java.util.concurrent.TimeUnit;

@Component
public class RedisLock {

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    public boolean tryLock(String lockKey, String lockValue, long expireTime, TimeUnit timeUnit) {
        ValueOperations<String, Object> valueOps = redisTemplate.opsForValue();
        Boolean result = valueOps.setIfAbsent(lockKey, lockValue, expireTime, timeUnit);
        // setIfAbsent 方法会在键不存在时设置键值对，并返回是否成功
        return result != null && result;
    }

    public void unlock(String lockKey, String lockValue) {
        ValueOperations<String, Object> valueOps = redisTemplate.opsForValue();
        // 确保只有锁的持有者才能释放锁，避免误释放
        if (lockValue.equals(valueOps.get(lockKey))) {
            redisTemplate.delete(lockKey);
        }
    }
}