[#45] Item 조회 메서드에 대한 로컬캐싱 적용

pom.xml

@@ -40,6 +40,15 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-redis</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-cache</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.ehcache</groupId>
+            <artifactId>ehcache</artifactId>
+            <version>3.8.1</version>
+        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>

src/main/java/me/jjeda/mall/items/service/ItemService.java

@@ -7,6 +7,9 @@
 import me.jjeda.mall.items.domain.ItemCategory;
 import me.jjeda.mall.items.dto.ItemDto;
 import me.jjeda.mall.items.repository.ItemRepository;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.cache.annotation.EnableCaching;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -16,6 +19,7 @@
 
 @Service
 @RequiredArgsConstructor
+@EnableCaching
 public class ItemService {
 
     private final ItemRepository itemRepository;
@@ -31,10 +35,14 @@ public Item saveItem(ItemDto itemDto) {
     }
 
     @Transactional(readOnly = true)
+    @Cacheable(value = "findItemCache",key ="#itemId")
     public Optional<Item> getItem(Long itemId) {
         return itemRepository.findById(itemId);
     }
 
+    @CacheEvict(value = "findItemCache",key ="#itemId")
+    public void refreshCache(Long itemId) { }
+
     @Transactional(readOnly = true)
     public List<Item> salesList(Long accountId) {
         return itemRepository.findAllByAccountId(accountId);

src/main/resources/ehcache.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
+         updateCheck="false">
+    <diskStore path="java.io.tmpdir" />
+
+    <cache name="findItemCache"
+           maxEntriesLocalHeap="10000"
+           maxEntriesLocalDisk="1000"
+           eternal="false"
+           diskSpoolBufferSizeMB="20"
+           timeToIdleSeconds="300" timeToLiveSeconds="600"
+           memoryStoreEvictionPolicy="LFU"
+           transactionalMode="off">
+        <persistence strategy="localTempSwap" />
+    </cache>
+</ehcache>