게시글 등록/ 수정시 이미지를 batch insert 하도록 수정함 (#528)

* feat: 이미지 저장시 batch insert 하도록 수정

* feat: 게시글 수정시에도 이미지 정보를 batch update를 사용하도록 수정함

backend/src/main/java/edonymyeon/backend/image/postimage/repository/PostImageInfoCustomRepository.java

@@ -0,0 +1,10 @@
+package edonymyeon.backend.image.postimage.repository;
+
+import edonymyeon.backend.image.postimage.domain.PostImageInfo;
+
+import java.util.List;
+
+public interface PostImageInfoCustomRepository {
+
+    void batchSave(final List<PostImageInfo> imageInfos, final Long postId);
+}

backend/src/main/java/edonymyeon/backend/image/postimage/repository/PostImageInfoCustomRepositoryImpl.java

@@ -0,0 +1,36 @@
+package edonymyeon.backend.image.postimage.repository;
+
+import edonymyeon.backend.image.postimage.domain.PostImageInfo;
+import lombok.RequiredArgsConstructor;
+import org.springframework.jdbc.core.BatchPreparedStatementSetter;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.time.LocalDateTime;
+import java.util.List;
+
+@RequiredArgsConstructor
+public class PostImageInfoCustomRepositoryImpl implements PostImageInfoCustomRepository {
+
+    private final JdbcTemplate jdbcTemplate;
+
+    @Override
+    public void batchSave(final List<PostImageInfo> imageInfos, final Long postId) {
+        final LocalDateTime now = LocalDateTime.now();
+        jdbcTemplate.batchUpdate("INSERT INTO post_image_info (created_at, post_id, store_name) values (?, ?, ?)",
+                new BatchPreparedStatementSetter() {
+                    @Override
+                    public void setValues(final PreparedStatement ps, final int i) throws SQLException {
+                        ps.setObject(1, now);
+                        ps.setLong(2, postId);
+                        ps.setString(3, imageInfos.get(i).getStoreName());
+                    }
+
+                    @Override
+                    public int getBatchSize() {
+                        return imageInfos.size();
+                    }
+                });
+    }
+}

backend/src/main/java/edonymyeon/backend/image/postimage/repository/PostImageInfoRepository.java

@@ -8,7 +8,7 @@
 
 import java.util.List;
 
-public interface PostImageInfoRepository extends JpaRepository<PostImageInfo, Long> {
+public interface PostImageInfoRepository extends JpaRepository<PostImageInfo, Long>, PostImageInfoCustomRepository {
 
     List<PostImageInfo> findAllByPostId(final Long postId);
 

backend/src/main/java/edonymyeon/backend/post/application/PostService.java

@@ -62,7 +62,7 @@ public PostIdResponse createPost(final MemberId memberId, final PostRequest post
 
         final PostImageInfos postImageInfos = PostImageInfos.of(post,
                 imageService.saveAll(postRequest.newImages(), ImageType.POST));
-        postImageInfoRepository.saveAll(postImageInfos.getPostImageInfos());
+        postImageInfoRepository.batchSave(postImageInfos.getPostImageInfos(), post.getId());
 
         return new PostIdResponse(post.getId());
     }
@@ -133,8 +133,7 @@ public PostIdResponse updatePost(
 
         final List<Long> imageIdsToDelete = post.getImageIdsToDeleteBy(remainedImageNames, imagesToAdd);
         postImageInfoRepository.deleteAllByIds(imageIdsToDelete); //이때 기존 이미지중 삭제되는 것들은 softDelete
-
-        postImageInfoRepository.saveAll(imagesToAdd.getPostImageInfos()); // //새로 추가된 이미지들을 DB에 저장
+        postImageInfoRepository.batchSave(imagesToAdd.getPostImageInfos(), post.getId()); //새로 추가된 이미지들을 DB에 저장
 
         return new PostIdResponse(postId);
     }