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在springboot2.0中使用@cacheable时，如何为每个redis缓存配置不同的ttl

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我在springboot2.0中使用带有redis的@cacheable . 我已经将RedisCacheManager配置如下：

@Bean
public RedisCacheManager redisCacheManager(RedisConnectionFactory connectionFactory) {

    RedisCacheWriter redisCacheWriter = RedisCacheWriter.lockingRedisCacheWriter(connectionFactory);
    SerializationPair<Object> valueSerializationPair = RedisSerializationContext.SerializationPair
            .fromSerializer(new GenericJackson2JsonRedisSerializer());
    RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
    cacheConfiguration = cacheConfiguration.serializeValuesWith(valueSerializationPair);
    cacheConfiguration = cacheConfiguration.prefixKeysWith("myPrefix");
    cacheConfiguration = cacheConfiguration.entryTtl(Duration.ofSeconds(30));

    RedisCacheManager redisCacheManager = new RedisCacheManager(redisCacheWriter, cacheConfiguration);
    return redisCacheManager;
}

但这使得所有密钥ttl 30秒，如何为每个具有不同cachename的redis缓存配置不同的ttl？

spring-boot caching redis

2 回答

  • 1

    您可以通过为每个缓存创建不同的配置，仅使用一个CacheManager为每个缓存配置不同的到期时间，并将它们放在用于创建CacheManager的映射中 .

    例如：

    @Bean
RedisCacheWriter redisCacheWriter() {
    return RedisCacheWriter.lockingRedisCacheWriter(jedisConnectionFactory());
}

@Bean
RedisCacheConfiguration defaultRedisCacheConfiguration() {
    return RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofSeconds(defaultCacheExpiration));
}

@Bean
CacheManager cacheManager() {
    Map<String, RedisCacheConfiguration> cacheNamesConfigurationMap = new HashMap<>();
    cacheNamesConfigurationMap.put("cacheName1", RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofSeconds(ttl1)));
    cacheNamesConfigurationMap.put("cacheName2", RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofSeconds(ttl2)));
    cacheNamesConfigurationMap.put("cacheName3", RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofSeconds(ttl3)));

    return new RedisCacheManager(redisCacheWriter(), defaultRedisCacheConfiguration(), cacheNamesConfigurationMap);
}
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  • 0

    如果在使用@cacheable时需要为缓存配置不同的过期时间，则可以使用不同的ttl配置不同的CacheManager，并在服务中使用缓存时指定cacheManager .

    @Cacheable(cacheManager = "expireOneHour", value = "onehour", key = "'_onehour_'+#key", sync = true)
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