From 0706db9d1d5194c091e518b701a715334911a5b4 Mon Sep 17 00:00:00 2001
From: Hyeon-Uk <rlagusdnr120@gmail.com>
Date: Fri, 16 Aug 2024 09:19:11 +0900
Subject: [PATCH] =?UTF-8?q?[refactor]=20JPAQueryFactory=EB=A5=BC=20BeanCon?=
 =?UTF-8?q?tainer=EB=A1=9C=20=EC=83=9D=EC=84=B1=20=ED=9B=84=20=EA=B4=80?=
 =?UTF-8?q?=EB=A6=AC=ED=95=98=EB=8F=84=EB=A1=9D=20=EB=B3=80=EA=B2=BD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- 기존 로직은 메서드에서 매번 팩토리를 생성
- 매번 메서드마다 팩토리를 생성하는 코드 중복이 일어남
- 팩토리를 매번 생성하면 성능적인 오버헤드가 생김
- 팩토리는 Thread-Safe한 객체기 때문에 싱글톤으로 관리되어도 아무런 문제가 없다.
---
 .../woowak/lab/web/config/QuerydslConfig.java    | 16 ++++++++++++++++
 .../camp/woowak/lab/web/dao/store/StoreDao.java  |  7 ++++---
 2 files changed, 20 insertions(+), 3 deletions(-)
 create mode 100644 src/main/java/camp/woowak/lab/web/config/QuerydslConfig.java

diff --git a/src/main/java/camp/woowak/lab/web/config/QuerydslConfig.java b/src/main/java/camp/woowak/lab/web/config/QuerydslConfig.java
new file mode 100644
index 00000000..fb6d32a1
--- /dev/null
+++ b/src/main/java/camp/woowak/lab/web/config/QuerydslConfig.java
@@ -0,0 +1,16 @@
+package camp.woowak.lab.web.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import com.querydsl.jpa.impl.JPAQueryFactory;
+
+import jakarta.persistence.EntityManager;
+
+@Configuration
+public class QuerydslConfig {
+	@Bean
+	public JPAQueryFactory jpaQueryFactory(EntityManager entityManager) {
+		return new JPAQueryFactory(entityManager);
+	}
+}
diff --git a/src/main/java/camp/woowak/lab/web/dao/store/StoreDao.java b/src/main/java/camp/woowak/lab/web/dao/store/StoreDao.java
index 9923d30e..92712fb9 100644
--- a/src/main/java/camp/woowak/lab/web/dao/store/StoreDao.java
+++ b/src/main/java/camp/woowak/lab/web/dao/store/StoreDao.java
@@ -16,11 +16,12 @@
 @Repository
 @Transactional(readOnly = true)
 public class StoreDao {
-	@PersistenceContext
-	private EntityManager entityManager;
+	private final JPAQueryFactory qf;
+	public StoreDao(JPAQueryFactory qf) {
+		this.qf = qf;
+	}
 
 	public StoreInfoResponse findAllStoreList() {
-		JPAQueryFactory qf = new JPAQueryFactory(entityManager);
 		QStore store = QStore.store;
 
 		List<Store> fetchResult = qf.select(store)