三十四、Springboot集積SpringCache+Redis、キャッシュを実現

SpringCacheの注記やRedisのストレージ、期限切れなどを利用するために、SpringCache+RedisをSpringbootに統合します.
(一)カスタムキャッシュプロファイル

@Configuration
public class CacheConfiguration {
    /** *        */
    public static final String BOOKS_SEARCH_CACHE = "books_search";
    /** *        */
    public static final String CHAPTERS_BOOK_CACHE = "chapters_book";
    /** *        */
    public static final String CHAPTER_CONTENT_CACHE = "chapter_content";

    @Primary
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory){
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
        redisCacheConfiguration = redisCacheConfiguration
                //           ：30  
                .entryTtl(Duration.ofMinutes(30L))
                //     ，   
                .disableCachingNullValues()
                //  key    
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer()))
                //  value    
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(valueSerializer()));
        return RedisCacheManager
                .builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
                .cacheDefaults(redisCacheConfiguration)
                .build();
    }

    /** * key     */
    private RedisSerializer<String> keySerializer() {
        return new StringRedisSerializer();
    }
    /** * value     */
    private RedisSerializer<Object> valueSerializer() {
        return new GenericJackson2JsonRedisSerializer();
    }
}

(二)オープンキャッシュ@EnableCaching:オープンキャッシュ

@SpringBootApplication
@ServletComponentScan
@MapperScan("com.yuedu.dao")
@EnableScheduling
@EnableCaching
public class YueduApplication {

	public static void main(String[] args) {
		SpringApplication.run(YueduApplication.class, args);
	}

}

(三)応用

@Cacheable(cacheNames = CacheConfiguration.CHAPTERS_BOOK_CACHE, key = "#root.methodName+'['+#bookId+']'")
    public List<Chapter> searchChaptersByBookId(Integer bookId, int start, int size) {
        if (bookId == null || bookId < 1){
            throw new BaseException(ResultEnum.PARAM_ERROR);
        }
        Chapter chapter = new Chapter();
        chapter.setBookId(bookId);
        //    
        PageHelper.startPage(start, size);
        return selectChapters(chapter);
    }