What is the modern approach to configure multiple cache managers? - spring

Question

Situation: my spring-boot project has two objects in which I need to cache data. The problem is that the settings for expire time must be different for the two objects.
I found a lot of information on the web about how i can set up a cache manager, but I did not understand which of these methods can be used in modern industrial code.
Please tell me how to configure settings for 2 different cache managers and if you need cache managers at all? My head is in a mess.
p.s. I don't want to use third-party dependencies like ehcache.
example:
public class Repository1(){
#Cacheable("Repository1.findAllImportantThings")
public Map<Long, String> findAllImportantThings() {...}
}
public class Repository2(){
#Cacheable("Repository2.findOnlyOne")
public Map<Long, String> findOnlyOne(String id) {...}
}
There can be more methods in a class. But the point is that I need to set different TTLs for these two classes

Answer 1

When you want to have different cache TTL then you need cacheManager, if in case all the caches have same TTL then it is not required.
You can do it this way :
#Bean
fun cacheManager(connectionFactory: RedisConnectionFactory): RedisCacheManager {
val oneHourTTLCacheConfig = cacheConfigWithTTL(60) //TTL for cacheKey-1
val fourHoursTTLCacheConfig = cacheConfigWithTTL(240) //TTL for cacheKey-2
val cacheConfigurations = mapOf(
"cacheKey-1"
to oneHourTTLCacheConfig,
"cacheKey-2"
to fourHoursTTLCacheConfig
)
return RedisCacheManager.builder(connectionFactory)
.cacheDefaults(redisCacheConfiguration(CacheConfiguration.THIRTY_MINUTES_DEFAULT_TTL))
.withInitialCacheConfigurations(cacheConfigurations)
.build()
} // Sets default TTL to 30 minutes if the other cacheKeys don't require any different configuration
private fun cacheConfigWithTTL(ttlInMinutes: Long): RedisCacheConfiguration =
RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofMinutes(ttlInMinutes))
.disableCachingNullValues()
private fun redisCacheConfiguration(duration: Duration): RedisCacheConfiguration =
RedisCacheConfiguration
.defaultCacheConfig()
.entryTtl(duration)
You can add this to your cache configuration class. Let me know if you have any further question.