From b032804ecfcee9cb5ec371f50e39f12810f2dcde Mon Sep 17 00:00:00 2001
From: jisu <dlawotn3@naver.com>
Date: Sun, 2 Mar 2025 23:34:45 +0900
Subject: [PATCH] refactor: refactor caching logic to use cacheGateway object
 handling

---
 application/build.gradle.kts                     |  1 -
 .../com/dobby/service/ExperimentPostService.kt   |  8 ++------
 .../kotlin/com/dobby/gateway/CacheGateway.kt     |  2 ++
 .../gateway/cache/RedisCacheGatewayImpl.kt       | 16 +++++++++++++++-
 4 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/application/build.gradle.kts b/application/build.gradle.kts
index c81d3c1a..11f29d7d 100644
--- a/application/build.gradle.kts
+++ b/application/build.gradle.kts
@@ -21,7 +21,6 @@ dependencies {
 
 	implementation("org.jetbrains.kotlin:kotlin-stdlib")
 	implementation("org.springframework.boot:spring-boot-starter-data-jpa")
-	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
 
 	testImplementation("org.springframework.boot:spring-boot-starter-test")
 	testImplementation("io.mockk:mockk:1.13.10")
diff --git a/application/src/main/kotlin/com/dobby/service/ExperimentPostService.kt b/application/src/main/kotlin/com/dobby/service/ExperimentPostService.kt
index 767aefdc..067bfb59 100644
--- a/application/src/main/kotlin/com/dobby/service/ExperimentPostService.kt
+++ b/application/src/main/kotlin/com/dobby/service/ExperimentPostService.kt
@@ -7,7 +7,6 @@ import com.dobby.exception.InvalidRequestValueException
 import com.dobby.gateway.CacheGateway
 import com.dobby.enums.areaInfo.Area
 import com.dobby.enums.experiment.RecruitStatus
-import com.fasterxml.jackson.databind.ObjectMapper
 import jakarta.transaction.Transactional
 import org.springframework.stereotype.Service
 
@@ -29,7 +28,6 @@ class ExperimentPostService(
     private val getMyExperimentPostsUseCase: GetMyExperimentPostsUseCase,
     private val getMyExperimentPostTotalCountUseCase: GetMyExperimentPostTotalCountUseCase,
     private val cacheGateway: CacheGateway,
-    private val objectMapper: ObjectMapper,
 ) {
     @Transactional
     fun createNewExperimentPost(input: CreateExperimentPostUseCase.Input): CreateExperimentPostUseCase.Output {
@@ -94,14 +92,12 @@ class ExperimentPostService(
 
     private fun getCachedExperimentPostCounts(recruitStatus: RecruitStatus): GetExperimentPostCountsByRegionUseCase.Output? {
         val cacheKey = "experimentPostCounts:$recruitStatus"
-        return cacheGateway.get(cacheKey)?.let {
-            objectMapper.readValue(it, GetExperimentPostCountsByRegionUseCase.Output::class.java)
-        }
+        return cacheGateway.getObject(cacheKey, GetExperimentPostCountsByRegionUseCase.Output::class.java)
     }
 
     private fun cacheExperimentPostCounts(recruitStatus: RecruitStatus, output: Any) {
         val cacheKey = "experimentPostCounts:$recruitStatus"
-        cacheGateway.set(cacheKey, objectMapper.writeValueAsString(output))
+        cacheGateway.setObject(cacheKey, output)
     }
 
     private fun validateFilter(input: GetExperimentPostsUseCase.Input) {
diff --git a/domain/src/main/kotlin/com/dobby/gateway/CacheGateway.kt b/domain/src/main/kotlin/com/dobby/gateway/CacheGateway.kt
index 5809323b..fd09c58d 100644
--- a/domain/src/main/kotlin/com/dobby/gateway/CacheGateway.kt
+++ b/domain/src/main/kotlin/com/dobby/gateway/CacheGateway.kt
@@ -1,7 +1,9 @@
 package com.dobby.gateway
 
 interface CacheGateway {
+    fun <T> getObject(key: String, clazz: Class<T>): T?
     fun get(key: String): String?
+    fun setObject(key: String, value: Any)
     fun set(key: String, value: String)
     fun setCode(key: String, value: String)
     fun incrementRequestCount(key: String)
diff --git a/src/main/kotlin/com/dobby/backend/infrastructure/gateway/cache/RedisCacheGatewayImpl.kt b/src/main/kotlin/com/dobby/backend/infrastructure/gateway/cache/RedisCacheGatewayImpl.kt
index d87c2f4f..857fb2d0 100644
--- a/src/main/kotlin/com/dobby/backend/infrastructure/gateway/cache/RedisCacheGatewayImpl.kt
+++ b/src/main/kotlin/com/dobby/backend/infrastructure/gateway/cache/RedisCacheGatewayImpl.kt
@@ -1,6 +1,7 @@
 package com.dobby.backend.infrastructure.gateway.cache
 
 import com.dobby.gateway.CacheGateway
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import org.springframework.core.env.Environment
 import org.springframework.data.redis.core.RedisTemplate
 import org.springframework.stereotype.Component
@@ -12,14 +13,27 @@ class RedisCacheGatewayImpl(
     private val environment: Environment
 ) : CacheGateway {
 
+    private val objectMapper = jacksonObjectMapper()
+
     private val cacheTimeout = 240L
     private val codeTimeout = 10L
     private val requestTimeout = 24L
 
+    override fun <T> getObject(key: String, clazz: Class<T>): T? {
+        return get(key)?.let { json ->
+            objectMapper.readValue(json, clazz)
+        }
+    }
+
     override fun get(key: String): String? {
         return redisTemplate.opsForValue().get(getCacheKey(key))
     }
 
+    override fun setObject(key: String, value: Any) {
+        val jsonValue = objectMapper.writeValueAsString(value)
+        set(key, jsonValue)
+    }
+
     override fun set(key: String, value: String) {
         redisTemplate.opsForValue().set(getCacheKey(key), value, cacheTimeout, TimeUnit.MINUTES)
     }
@@ -36,7 +50,7 @@ class RedisCacheGatewayImpl(
         val cacheKey = getCacheKey(key)
         val count = redisTemplate.opsForValue().increment(cacheKey, 1) ?: 1
 
-        if(count == 1L){
+        if (count == 1L) {
             redisTemplate.expire(cacheKey, requestTimeout, TimeUnit.HOURS)
         }
     }