feat: #1 단건 조회 api

src/main/kotlin/com/soon/common/application/ItemQueryService.kt

@@ -0,0 +1,17 @@
+package com.soon.common.application
+
+import com.soon.common.application.model.ItemGetSummary
+import com.soon.common.domain.item.ItemRepository
+import org.springframework.data.repository.findByIdOrNull
+import org.springframework.stereotype.Service
+
+@Service
+class ItemQueryService(
+        private val itemRepository: ItemRepository,
+) {
+    fun getItem(itemNo: Int): ItemGetSummary {
+        return itemRepository.findByIdOrNull(itemNo)?.let {
+            ItemGetSummary.of(it)
+        } ?: throw IllegalArgumentException()
+    }
+}

src/main/kotlin/com/soon/common/application/model/ItemGetSummary.kt

@@ -0,0 +1,17 @@
+package com.soon.common.application.model
+
+import com.soon.common.domain.item.Item
+
+data class ItemGetSummary(
+        val serviceNo: Int,
+        val title: String,
+        val description: String,
+) {
+    companion object {
+        fun of(item: Item) = ItemGetSummary(
+                serviceNo = item.serviceNo,
+                title = item.title,
+                description = item.description,
+        )
+    }
+}

src/main/kotlin/com/soon/common/presentation/extension/MemberHeader.kt

@@ -1,14 +1,14 @@
-package com.soon.member.presentation.extension
+package com.soon.common.presentation.extension
 
 import com.fasterxml.jackson.annotation.JsonProperty
 
 
 data class MemberHeader
 (
-    @JsonProperty("no")
-    val no: Int,
-    @JsonProperty("name")
-    val name: String,
-    @JsonProperty("account")
-    val account: String,
+        @JsonProperty("no")
+        val no: Int,
+        @JsonProperty("name")
+        val name: String,
+        @JsonProperty("account")
+        val account: String,
 )

src/main/kotlin/com/soon/common/presentation/extension/RequestExtension.kt

@@ -1,19 +1,24 @@
-package com.soon.member.presentation.extension
+package com.soon.common.presentation.extension
 
 import com.soon.common.domain.extension.decodeBase64ToDto
-import com.soon.common.presentation.extension.ServiceHeader
 import org.springframework.web.reactive.function.server.ServerRequest
+import org.springframework.web.reactive.function.server.queryParamOrNull
 
-fun ServerRequest.extractMemberCodeHeader() :MemberHeader{
+fun ServerRequest.extractMemberCodeHeader(): MemberHeader {
     return headers().header("Member-Code").firstOrNull()
-    ?.let{
-        it.decodeBase64ToDto<MemberHeader>()
-    }?:throw IllegalArgumentException()
+            ?.let {
+                it.decodeBase64ToDto<MemberHeader>()
+            } ?: throw IllegalArgumentException()
 }
 
-fun ServerRequest.extractServiceCodeHeader() :ServiceHeader{
+fun ServerRequest.extractServiceCodeHeader(): ServiceHeader {
     return headers().header("Service-Code").firstOrNull()
-        ?.let{
-            it.decodeBase64ToDto<ServiceHeader>()
-        }?:throw IllegalArgumentException()
-}
+            ?.let {
+                it.decodeBase64ToDto<ServiceHeader>()
+            } ?: throw IllegalArgumentException()
+}
+
+fun ServerRequest.intQueryParam(parameter: String): Int {
+    return queryParamOrNull(parameter)?.toIntOrNull()
+            ?: throw IllegalArgumentException("Invalid or missing 'itemNo' query parameter")
+}

src/main/kotlin/com/soon/common/presentation/handler/ItemHandler.kt

@@ -1,19 +1,19 @@
 package com.soon.common.presentation.handler
 
 import com.soon.common.application.ItemCommandService
+import com.soon.common.application.ItemQueryService
 import com.soon.common.application.util.coroutines.ApplicationDispatchers
+import com.soon.common.presentation.extension.extractServiceCodeHeader
+import com.soon.common.presentation.extension.intQueryParam
 import com.soon.common.presentation.handler.model.ItemCreateRequest
-import com.soon.member.presentation.extension.extractServiceCodeHeader
 import kotlinx.coroutines.withContext
 import org.springframework.stereotype.Service
-import org.springframework.web.reactive.function.server.ServerRequest
-import org.springframework.web.reactive.function.server.ServerResponse
-import org.springframework.web.reactive.function.server.awaitBodyOrNull
-import org.springframework.web.reactive.function.server.buildAndAwait
+import org.springframework.web.reactive.function.server.*
 
 @Service
 class ItemHandler(
-        private val itemCommandService: ItemCommandService
+        private val itemCommandService: ItemCommandService,
+        private val itemQueryService: ItemQueryService,
 ) {
     suspend fun createItem(request: ServerRequest): ServerResponse = withContext(ApplicationDispatchers.IO) {
         val serviceHeader = request.extractServiceCodeHeader()
@@ -24,4 +24,8 @@ class ItemHandler(
         ServerResponse.noContent().buildAndAwait()
     }
 
+    suspend fun getItem(request: ServerRequest): ServerResponse = withContext(ApplicationDispatchers.IO) {
+        val itemNo = request.intQueryParam("itemNo")
+        ServerResponse.ok().bodyValueAndAwait(itemQueryService.getItem(itemNo))
+    }
 }

src/main/kotlin/com/soon/common/presentation/router/item/ItemInternalRouter.kt

@@ -15,6 +15,7 @@ class ItemInternalRouter(private val itemHandler: ItemHandler) {
         return coRouter {
             (accept(MediaType.APPLICATION_JSON) and "/internal/common/item").nest {
                 POST("", itemHandler::createItem)
+                GET("", itemHandler::getItem)
             }
         }
     }

src/test/http/common-game.http

@@ -1,9 +1,14 @@
 ### 아이템 생성
-POST localhost:8083/common/backoffice/item
+POST localhost:8083/internal/common/item
 Content-Type: application/json
 Service-Code:eyJubyI6MSwidGl0bGUiOiJ0aXRsZSJ9
 
 {
   "title": "title",
   "description": "description"
 }
+
+### 아이템 조회
+GET localhost:8083/internal/common/item?itemNo=1
+Content-Type: application/json
+Service-Code:eyJubyI6MSwidGl0bGUiOiJ0aXRsZSJ9