Spring-Redis缓存业务优化(通配符删除、两种自定义缓存时长)

application.yml配置

spring: 
  cache:
    type: REDIS
    redis:
      time-to-live: PT300S # 默认缓存秒数
      cache-null-values: false # 是否缓存空值

支持指定cacheNames设置缓存时长

/**
 * Redis配置类
 *
 * @author ZJJ
 */
@Configuration
@EnableConfigurationProperties(CacheProperties.class)
public class RedisCacheConfig extends CachingConfigurerSupport {
    @Autowired
    private CacheProperties cacheProperties;

    @Autowired
    private RedisConnectionFactory redisConnectionFactory;

    @Bean
    @Primary
    public RedisTemplate<Serializable, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Serializable, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);

        // 使用Jackson2JsonRedisSerialize 替换默认序列化
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);

        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);

        jackson2JsonRedisSerializer.setObjectMapper(om);

        // 设置value的序列化规则和 key的序列化规则
        redisTemplate.setDefaultSerializer(new StringRedisSerializer(StandardCharsets.UTF_8));// 默认为：JdkSerializeable
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }

    /**
     * 默认缓存管理器
     * <br>
     * 使用样例1：@Cacheable(cacheNames = "demoCache", key = "#id")// 5分钟
     * 使用样例2：@Cacheable(cacheNames = "userCache", key = "#id")// 默认10分钟
     * 使用样例3：@Cacheable(cacheNames = "customCache#60", key = "#id") // 自定义缓存60秒
     */
    @Override
    @Bean
    public RedisCacheManager cacheManager() {
        RedisCacheConfiguration defaultCacheConfig = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(this.cacheProperties.getRedis().getTimeToLive());

        // 针对不同cacheName，设置不同的过期时间
        Map<String, RedisCacheConfiguration> initialCacheConfiguration = new LinkedHashMap<String, RedisCacheConfiguration>() {
            {
                this.put("demoCache", RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMinutes(5)));
                // this.put("userCache", RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMinutes(10))); // 10分钟
                // TODO 其他自定义缓存时长...
            }
        };

        // return RedisCacheManager.builder(this.redisConnectionFactory).cacheDefaults(defaultCacheConfig)
        // .withInitialCacheConfigurations(initialCacheConfiguration).build();
        return new CustomRedisCacheManager(RedisCacheWriter.nonLockingRedisCacheWriter(this.redisConnectionFactory), defaultCacheConfig,
                initialCacheConfiguration);
    }
}

/**
 * 自定义Redis缓存管理器 - 支持缓存名#缓存秒数
 *
 * @author ZJJ
 */
class CustomRedisCacheManager extends RedisCacheManager {
    public CustomRedisCacheManager(RedisCacheWriter cacheWriter, RedisCacheConfiguration defaultCacheConfiguration) {
        super(cacheWriter, defaultCacheConfiguration);
    }

    public CustomRedisCacheManager(RedisCacheWriter cacheWriter, RedisCacheConfiguration defaultCacheConfiguration,
            Map<String, RedisCacheConfiguration> initialCacheConfigurations) {
        super(cacheWriter, defaultCacheConfiguration, initialCacheConfigurations, true);
    }

    @Override
    protected RedisCache createRedisCache(String name, RedisCacheConfiguration cacheConfig) {
        String[] array = name.split("#");
        name = array[0];
        if (array.length > 1) { // 解析TTL
            cacheConfig = cacheConfig.entryTtl(Duration.ofSeconds(Long.parseLong(array[1]))); // 秒
        }
        return super.createRedisCache(name, cacheConfig);
    }
}

 

调整evict方法支持key通配符

重写 org.springframework.data.redis.cache.RedisCache

…

    /*
     * 使用样例：@CacheEvict(cacheNames = "loginCache", key = "test-*")
     */
    @Override
    public void evict(Object key) {
        if (key instanceof String && ((String) key).endsWith("*")) {// 通配符删除
            byte[] pattern = this.conversionService.convert(this.createCacheKey(key), byte[].class);
            this.cacheWriter.clean(this.name, pattern);
        } else {// 单一key删除
            this.cacheWriter.remove(this.name, this.createAndConvertCacheKey(key));
        }
    }

…

来源：oschina

链接：https://my.oschina.net/zyrs/blog/4466355