Implement Redis Multi-Database Caching with SpringBoot

Updated: June 13, 2024 11:29:54 Author: Shi Xingdong

In my system, in order to optimize the storage and access efficiency of user behavior data, I introduced Redis cache and distributed the data in different Redis databases. In this way, the load of a single database can be reduced and the overall performance of the system can be improved. Therefore, this article introduces the use of SpringBoot to implement Redis multi-database cache. Friends who need it can refer to it.

Redis multi-database storage implements user behavior cache

Main implementation steps

Redis configuration

- Configure two Redis connection factories to store token and user behavior data respectively.
- Create the corresponding RedisTemplate instance and specify different connection factories and serialization methods.
User behavior services
- passUserBehaviorServiceInterface and implementation classesUserBehaviorServiceImpl, realize the record of user likes, collections, comments, and browsing behaviors.
- While operating the database, user behavior data is stored in Redis to improve read efficiency.
Token Interceptor
- useTokenInterceptorThe class verifies the token before each request.
- After verification is passed, store user information inThreadLocal, for subsequent operations.

Code implementation

Redis configuration class

@Configuration
public class RedisConfig {

    @Value("${}")
    private String redisHost;

    @Value("${}")
    private int redisPort;

    @Value("${}")
    private String redisPassword;

    @Bean(name = "tokenRedisConnectionFactory")
    public RedisConnectionFactory tokenRedisConnectionFactory() {
        RedisStandaloneConfiguration config = new RedisStandaloneConfiguration(redisHost, redisPort);
        (redisPassword);
        (0);
        return new LettuceConnectionFactory(config);
    }

    @Bean(name = "userBehaviorRedisConnectionFactory")
    public RedisConnectionFactory userBehaviorRedisConnectionFactory() {
        RedisStandaloneConfiguration config = new RedisStandaloneConfiguration(redisHost, redisPort);
        (redisPassword);
        (1);
        return new LettuceConnectionFactory(config);
    }

    @Bean(name = "redisTemplate")
    public StringRedisTemplate redisTemplate(@Qualifier("tokenRedisConnectionFactory") RedisConnectionFactory redisConnectionFactory) {
        StringRedisTemplate template = new StringRedisTemplate();
        (redisConnectionFactory);
        (new StringRedisSerializer());
        (new StringRedisSerializer());
        return template;
    }

    @Bean(name = "userBehaviorRedisTemplate")
    public RedisTemplate<String, Map<String, Integer>> userBehaviorRedisTemplate(@Qualifier("userBehaviorRedisConnectionFactory") RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Map<String, Integer>> template = new RedisTemplate<>();
        (redisConnectionFactory);
        (new StringRedisSerializer());
        (new Jackson2JsonRedisSerializer<>());
        return template;
    }
}

User behavior service implementation class

@Service
public class UserBehaviorServiceImpl implements UserBehaviorService {

    private static final long CACHE_EXPIRATION_DAYS = 1;
    private static final String CACHE_PREFIX = "articleCounts:";

    @Autowired
    private UserBehaviorMapper userBehaviorMapper;

    @Autowired
    @Qualifier("userBehaviorRedisTemplate")
    private RedisTemplate<String, Map<String, Integer>> userBehaviorRedisTemplate;

    @Override
    public void setLikeArticle(Likes likes) {
        (());
        Integer userId = ("id");
        if (userId != null) {
            (userId);
        }
        (likes);
    }

    @Override
    public void setFavoriteArticle(Favorites favorites) {
        (());
        Integer userId = ("id");
        if (userId != null) {
            (userId);
        }
        (favorites);
    }

    @Override
    public void setCommentArticle(Comments comments) {
        (());
        Integer userId = ("id");
        if (userId != null) {
            (userId);
        }
        (comments);
    }

    @Override
    public void setViewArticle(Views views) {
        (());
        Integer userId = ("id");
        if (userId != null) {
            (userId);
        }
        (views);
    }

    @Override
    public Map<String, Integer> getArticleCounts(Integer articleId) {
        String key = CACHE_PREFIX + articleId;
        Map<String, Integer> counts = ().get(key);
        if (counts == null) {
            counts = fetchArticleCountsFromDB(articleId);
            cacheArticleCounts(articleId, counts);
        }
        return counts;
    }

    private Map<String, Integer> fetchArticleCountsFromDB(Integer articleId) {
        Map<String, Integer> counts = new HashMap<>();
        ("likesCount", (articleId));
        ("favoritesCount", (articleId));
        ("commentsCount", (articleId));
        ("viewsCount", (articleId));
        return counts;
    }

    private void cacheArticleCounts(Integer articleId, Map<String, Integer> counts) {
        String key = CACHE_PREFIX + articleId;
        ().set(key, counts, CACHE_EXPIRATION_DAYS, );
    }
}

Token Interceptor

@Component
public class TokenInterceptor implements HandlerInterceptor {

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, @NotNull HttpServletResponse response, @NotNull Object handler) throws Exception {
        String token = ("Authorization");
        if (token == null || ()) {
            (());
            return false;
        }

        try {
            ValueOperations<String, String> operations = ();
            String redisToken = (token);
            if (redisToken == null) {
                (());
                return false;
            }

            Map<String, Object> claims = (token);
            (claims);
            return true;
        } catch (Exception e) {
            (());
            return false;
        }
    }

    @Override
    public void postHandle(@NotNull HttpServletRequest request, @NotNull HttpServletResponse response, @NotNull Object handler, ModelAndView modelAndView) throws Exception {
    }

    @Override
    public void afterCompletion(@NotNull HttpServletRequest request, @NotNull HttpServletResponse response, @NotNull Object handler, Exception ex) throws Exception {
        ();
    }
}

This is the end of this article about using SpringBoot to implement Redis multi-database cache. For more related SpringBoot Redis data cache content, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!

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