詳解SpringBoot2.0的@Cacheable(Redis)緩存失效時間解決方案

問題

  @Cacheable註解不支持配置過期時間,所有需要通過配置CacheManneg來配置默認的過期時間和針對每個類或者是方法進行緩存失效時間配置。

解決

  可以采用如下的配置信息來解決的設置失效時間問題

配置信息

 @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        return new RedisCacheManager(
                RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory),
                this.getRedisCacheConfigurationWithTtl(30*60), // 默認策略,未配置的 key 會使用這個
                this.getRedisCacheConfigurationMap() // 指定 key 策略
        );
    }

    private Map<String, RedisCacheConfiguration> getRedisCacheConfigurationMap() {
        Map<String, RedisCacheConfiguration> redisCacheConfigurationMap = new HashMap<>();
        //SsoCache和BasicDataCache進行過期時間配置
        redisCacheConfigurationMap.put("SsoCache", this.getRedisCacheConfigurationWithTtl(24*60*60));
        redisCacheConfigurationMap.put("BasicDataCache", this.getRedisCacheConfigurationWithTtl(30*60));
        return redisCacheConfigurationMap;
    }

    private RedisCacheConfiguration getRedisCacheConfigurationWithTtl(Integer seconds) {
        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);

        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
        redisCacheConfiguration = redisCacheConfiguration.serializeValuesWith(
                RedisSerializationContext
                        .SerializationPair
                        .fromSerializer(jackson2JsonRedisSerializer)
        ).entryTtl(Duration.ofSeconds(seconds));

        return redisCacheConfiguration;
    }

    @Bean
    public KeyGenerator wiselyKeyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append("." + method.getName());
                if(params==null||params.length==0||params[0]==null){
                    return null;
                }
                String join = String.join("&", Arrays.stream(params).map(Object::toString).collect(Collectors.toList()));
                String format = String.format("%s{%s}", sb.toString(), join);
                //log.info("緩存key:" + format);
                return format;
            }
        };
    }

使用方式

@CacheConfig(cacheNames = "SsoCache")
public class SsoCache{
	@Cacheable(keyGenerator = "wiselyKeyGenerator")
	public String getTokenByGsid(String gsid) 
}
//二者選其一,可以使用value上的信息,來替換類上cacheNames的信息
@Cacheable(value = "BasicDataCache",keyGenerator = "wiselyKeyGenerator")
public String getTokenByGsid(String gsid) 

效果展示

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