Kotlin Spring Boot Redis Cache 대충 적용하기.

그냥 메모용으로..

(너무나 흔해서 설명 필요 없음. 구현방식만 내맘대로)

 

캐시로 사용될 키-TTL 에 대한 Enum 하나. ( 직접 처리해도 됨 )

enum class RedisCacheKeyProperties(val description: String, val ttl: Long, val key: Boolean, val placeholder: String, val dpOrderNumber: Int) {
    cached_default(
        "시스템 유지 관리 캐시",
        60 * 60 * 24L,
        true,
        "KEY",
        0
    ),  //second s * m * h
    cached_company_id(
        "회사 정보 캐시",
        60 * 60 * 24L,
        true,
        "KEY",
        0
    ),  //second s * m * h
}

 

Lettuce 설정

@Configuration(proxyBeanMethods = false)
class LettuceRedisCacheConfiguration {

    @Bean
    fun redisCacheManagerCustomizer() = RedisCacheManagerBuilderCustomizer { builder ->
        builder.withInitialCacheConfigurations(getCacheKeyValuesMap())
    }

    @Bean
    fun cacheConfiguration(): RedisCacheConfiguration? {
        return RedisCacheConfiguration.defaultCacheConfig()
            .entryTtl(Duration.ofMinutes(60))
            .disableCachingNullValues()
            .serializeValuesWith(SerializationPair.fromSerializer(GenericJackson2JsonRedisSerializer()))

    }
    
    fun getCacheKeyValuesMap() = RedisCacheKeyProperties.values()
    .associate { it.name to RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofSeconds(it.ttl)) }
   
}

 

 

YML

spring:
  redis:
    host: 127.0.0.1
    port: 6379
    lettuce:
      pool:
        max-active: 15
        max-idle: 8
        min-idle: 3
        max-wait: -1
      shutdown-timeout: 2000
    timeout: 3000
  cache:
    type: redis

build.gradle.kt

// default Lettuce
..
implementation("org.apache.commons:commons-pool2")
implementation("org.springframework.boot:spring-boot-starter-cache")
implementation("org.springframework.boot:spring-boot-starter-data-redis")
..

대충 코드

@Service
class CompanyFinder (val grissomApiClient : GrissomApiClient){

    @Cacheable(key = "#companyId", value = ["cached_company_id"])
    fun findByCompanyId(companyId : Long) : CompanySimpleInfo {
        return grissomApiClient.getCompany(companyId)
    }
}

 

 

https://github.com/KimHyeongi/KotlinSpringboot-Tips

KimHyeongi/KotlinSpringboot-Tips