快捷導(dǎo)航

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

更新時間：2021年04月30日 10:14:21 作者：香酥蟹

這篇文章主要介紹了詳解SpringBoot2.0的@Cacheable(Redis)緩存失效時間解決方案，文中通過示例代碼介紹的非常詳細(xì)，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價值，需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧

問題

@Cacheable注解不支持配置過期時間，所有需要通過配置CacheManneg來配置默認(rèn)的過期時間和針對每個類或者是方法進(jìn)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(shè)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(rèn)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(jìn)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