SpringBoot使用读写锁解决缓存一致性的问题

@Component
public class RedisCache {

    private static final String CACHE_PREFIX = "my-cache:";

    private final RedisTemplate<String, Object> redisTemplate;
    private final ReadWriteLock readWriteLock;

    public RedisCache(RedisTemplate<String, Object> redisTemplate) {
        this.redisTemplate = redisTemplate;
        this.readWriteLock = new ReentrantReadWriteLock();
    }

    public Object get(String key) {
        readWriteLock.readLock().lock();
        try {
            return redisTemplate.opsForValue().get(CACHE_PREFIX + key);
        } finally {
            readWriteLock.readLock().unlock();
        }
    }

    public void set(String key, Object value) {
        readWriteLock.writeLock().lock();
        try {
            redisTemplate.opsForValue().set(CACHE_PREFIX + key, value);
        } finally {
            readWriteLock.writeLock().unlock();
        }
    }

    public void delete(String key) {
        readWriteLock.writeLock().lock();
        try {
            redisTemplate.delete(CACHE_PREFIX + key);
        } finally {
            readWriteLock.writeLock().unlock();
        }
    }
}

@Service
public class UserService {

    private final RedisCache redisCache;

    public UserService(RedisCache redisCache) {
        this.redisCache = redisCache;
    }

    public User getUserById(Long userId) {
        String key = "user:" + userId;
        User user = (User) redisCache.get(key);
        if (user == null) {
            // 从数据库中查询用户信息
            user = userDao.getUserById(userId);
            // 将用户信息写入缓存
            redisCache.set(key, user);
        }
        return user;
    }

    public void updateUser(User user) {
        String key = "user:" + user.getId();
        // 先删除缓存中的用户信息
        redisCache.delete(key);
        // 更新数据库中的用户信息
        userDao.updateUser(user);
    }

}