jpashop : 컬럭션 조회 v3.1 (dto응답, paging, batchsize)

jpashop/src/main/java/com/example/jpashop/api/OrderApiController.java

@@ -6,6 +6,7 @@ import com.example.jpashop.repository.OrderRepository;
 import com.example.jpashop.repository.OrderSearch;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
 import java.util.List;
@@ -44,4 +45,14 @@ public class OrderApiController {
                 .map(OrderDto::new)
                 .collect(Collectors.toList());
     }
+
+    @GetMapping("/api/v3.1/orders")
+    public List<OrderDto> ordersV3_page(
+            @RequestParam(value = "offset", defaultValue = "0") int offset,
+            @RequestParam(value = "limit", defaultValue = "100") int limit) {
+        List<Order> orders = orderRepository.findAllWithMemberDelivery(offset, limit);
+        return orders.stream()
+                .map(OrderDto::new)
+                .collect(Collectors.toList());
+    }
 }

jpashop/src/main/java/com/example/jpashop/domain/Order.java

@@ -4,6 +4,7 @@ import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
+import org.hibernate.annotations.BatchSize;
 
 import javax.persistence.*;
 import java.time.LocalDateTime;
@@ -24,6 +25,7 @@ public class Order {
     @JoinColumn(name = "member_id")
     private Member member;
 
+//    @BatchSize(size = 1000)
     @OneToMany(mappedBy = "order", cascade = CascadeType.ALL)
     private List<OrderItem> orderItems = new ArrayList<>();
 

jpashop/src/main/java/com/example/jpashop/domain/OrderItem.java

@@ -6,9 +6,11 @@ import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
+import org.hibernate.annotations.BatchSize;
 
 import javax.persistence.*;
 
+//@BatchSize(size = 100)
 @Entity
 @Getter @Setter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)

jpashop/src/main/java/com/example/jpashop/repository/OrderRepository.java

@@ -96,6 +96,16 @@ public class OrderRepository {
                .getResultList();
     }
 
+    public List<Order> findAllWithMemberDelivery(int offset, int limit) {
+        return em.createQuery(
+                "select o from Order o" +
+                        " join fetch o.member m" +
+                        " join fetch o.delivery", Order.class)
+                .setFirstResult(offset)
+                .setMaxResults(limit)
+                .getResultList();
+    }
+
     public List<Order> findAllWithMemberDelivery() {
         return em.createQuery(
                 "select o from Order o" +

jpashop/src/main/resources/application.yml

@@ -12,6 +12,7 @@ spring:
       hibernate:
 #        show_sql: true
         format_sql: true
+        default_batch_fecth_size: 100
 
 logging:
   level: