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week5(정화): 멀티모듈 아키텍처 변경 및 캐싱(로컬, Remote, 하이브리드) 활용 #44

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@hoa0217 hoa0217 commented Dec 2, 2024

  • 아키텍처 개선 - 상품, 브랜드, 카테고리, 전시 모듈 분리
  • 전시 api 개발
  • 로컬 캐시 적용
  • 리모트 캐시 적용
  • 하이브리드 캐시 적용
  • 상품 정보 업데이트 로직 구현 - Redis Pub/Sub 사용

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@hoa0217 hoa0217 self-assigned this Dec 2, 2024
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coderabbitai bot commented Dec 3, 2024

Walkthrough

The changes introduce a multi-module Java Spring Boot project with various components, including brand, catalog, category, display, and order management features. Key modifications include the addition of configuration files for Git, Gradle, and application properties, alongside new classes and interfaces for managing entities such as products, orders, and categories. The implementation of RESTful controllers and service classes facilitates interaction with these entities, while caching support is integrated to enhance performance. Additionally, load and smoke testing scripts are provided for performance evaluation.

Changes

File Path Change Summary
playground/hoa0217/java-springboot-order-perf-multi-module/.gitattributes New file added to manage line endings and binary files.
playground/hoa0217/java-springboot-order-perf-multi-module/.gitignore New file added to specify files and directories to ignore in version control.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/build.gradle New dependencies added for web, JPA, validation, and H2 database.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/BrandApplication.java New Spring Boot application entry point class added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/application/BrandManager.java New service class for managing brand operations added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/application/dto/BrandResponse.java New DTO record for brand response added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/domain/Brand.java New entity class for Brand added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/domain/BrandRepository.java New repository interface for Brand added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/exception/BrandIdNotFoundException.java New exception class for handling brand ID not found scenarios added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/ui/BrandController.java New REST controller for Brand added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/resources/application.yml New configuration file for H2 database and JPA settings added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/resources/data.sql New SQL insert statements for populating the brand table added.
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/resources/schema.sql New SQL schema definition for the brand table added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/build.gradle New dependencies added for catalog module.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/CatalogApplication.java New Spring Boot application entry point class for catalog added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/application/CatalogManager.java New service class for managing catalog operations added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/application/dto/ProductResponse.java New DTO record for product response added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/domain/Product.java New entity class for Product added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/domain/ProductRepository.java New repository interface for Product added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/exception/ProductIdNotFoundException.java New exception class for handling product ID not found scenarios added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/ui/ProductController.java New REST controller for Product added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/resources/application.yml New configuration file for catalog module added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/resources/data.sql New SQL insert statements for populating the product table added.
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/resources/schema.sql New SQL schema definition for the product table added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/build.gradle New dependencies added for category module.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/CategoryApplication.java New Spring Boot application entry point class for category added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/application/CategoryManager.java New service class for managing category operations added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/application/dto/CategoryResponse.java New DTO record for category response added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/domain/Category.java New entity class for Category added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/domain/CategoryRepository.java New repository interface for Category added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/exception/CategoryIdNotFoundException.java New exception class for handling category ID not found scenarios added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/ui/CategoryController.java New REST controller for Category added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/resources/application.yml New configuration file for category module added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/resources/data.sql New SQL insert statements for populating the category table added.
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/resources/schema.sql New SQL schema definition for the category table added.
playground/hoa0217/java-springboot-order-perf-multi-module/common/build.gradle Updates to dependencies for common module.
playground/hoa0217/java-springboot-order-perf-multi-module/common/src/main/java/com/example/config/RestTemplateConfig.java New configuration class for RestTemplate added.
playground/hoa0217/java-springboot-order-perf-multi-module/common/src/main/java/com/example/domain/BaseEntity.java New base entity class for JPA entities added.
playground/hoa0217/java-springboot-order-perf-multi-module/display/build.gradle Updates to dependencies for display module.
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/DisplayApplication.java New Spring Boot application entry point class for display added.
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/DisplayManager.java New service class for managing display operations added.
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/dto/ProductResponse.java New DTO record for product display response added.
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/domain/Products.java New record for managing a collection of products added.
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/resources/ehcache.xml New configuration file for Ehcache added.
activity/week5/hoa0217/script/load-test.js New load testing script using k6 framework added.
activity/week5/hoa0217/script/smoke-test.js New smoke testing script using k6 framework added.
playground/hoa0217/java-springboot-order-perf-multi-module/settings.gradle New settings file for multi-module Gradle project added.
playground/hoa0217/java-springboot-order-perf-multi-module/gradlew New shell script for executing Gradle added.
playground/hoa0217/java-springboot-order-perf-multi-module/gradlew.bat New batch script for executing Gradle on Windows added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/build.gradle New dependencies added for order module.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/OrderApplication.java New Spring Boot application entry point class for order added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/application/OrderManager.java New service class for managing order operations added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/application/dto/OrderSheet.java New DTO record for order sheet added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/application/dto/OrderSheetItem.java New DTO record for order sheet items added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/Order.java New entity class for Order added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderLine.java New entity class for OrderLine added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderLineMapper.java New interface for mapping order lines added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderProduct.java New embedded class for order product details added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderRepository.java New repository interface for Order added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderStatus.java New enum for order statuses added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/ShippingDesk.java New interface for shipping desk added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/OrderCatalogHandler.java New class for handling order catalog mapping added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/catalog/HttpProductRepository.java New HTTP-based product repository implementation added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/catalog/Product.java New record for product details added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/catalog/ProductRepository.java New interface for product repository added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/ui/OrderController.java New REST controller for handling orders added.
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/resources/application.yml New configuration file for order module added.

Poem

In the garden of code, new blooms arise,
With modules and classes reaching the skies.
Spring's gentle touch, in each line we weave,
A tapestry bright, in which we believe.
From orders to brands, our dreams take flight,
In the world of Java, everything feels right! 🐇✨


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Actionable comments posted: 55

🧹 Outside diff range and nitpick comments (44)
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/resources/application.yml (2)

1-2: LGTM! Port configuration aligns with modular architecture.

The unique port (8083) for the display module supports the modular monolith architecture, allowing independent deployment and testing of modules while avoiding port conflicts with other modules (brand: 8080, catalog: 8082).

🧰 Tools
🪛 yamllint (1.35.1)

[error] 2-2: no new line character at the end of file

(new-line-at-end-of-file)


2-2: Add newline at end of file.

Add a newline character at the end of the file to follow YAML best practices.

 server:
   port: 8083
+
🧰 Tools
🪛 yamllint (1.35.1)

[error] 2-2: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/infrastructure/ProductsResponse.java (1)

6-10: Consider adding documentation for the record

Adding Javadoc documentation would improve the maintainability and clarity of the code.

+/**
+ * Response DTO containing a list of products for display purposes.
+ *
+ * @param products List of product responses
+ */
 public record ProductsResponse(
         List<ProductResponse> products
 ) {
 }
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/resources/schema.sql (3)

7-8: Add indexes for JOIN performance

Consider adding indexes on brand_id and category_id to improve query performance when joining with related tables.

Add the following indexes:

CREATE INDEX idx_product_brand_id ON product(brand_id);
CREATE INDEX idx_product_category_id ON product(category_id);

10-10: Consider using DECIMAL type for price

Using INTEGER for price might not be suitable for all scenarios (e.g., prices with decimal points). Consider using DECIMAL/NUMERIC for more precise monetary values.

-    price INTEGER NOT NULL,
+    price DECIMAL(10,2) NOT NULL,

11-11: Consider using TEXT type for description

VARCHAR(255) might be limiting for product descriptions. Consider using TEXT type if you need to store longer descriptions.

-    description VARCHAR(255)
+    description TEXT
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/resources/application.yml (2)

1-20: Consider environment-specific configurations and caching setup

The current configuration could benefit from:

  1. Environment-specific profiles (dev, prod)
  2. Caching configuration (as mentioned in PR objectives)
  3. Database persistence strategy for production

Consider adding these configurations:

spring:
  profiles:
    active: ${SPRING_PROFILES_ACTIVE:dev}
  cache:
    type: caffeine
    caffeine:
      spec: maximumSize=500,expireAfterWrite=30s

Would you like assistance in setting up the complete environment-specific configurations and caching implementation?

🧰 Tools
🪛 yamllint (1.35.1)

[error] 20-20: no new line character at the end of file

(new-line-at-end-of-file)


19-20: Add newline at end of file

Missing newline character at end of file.

server:
  port: 8081
+
🧰 Tools
🪛 yamllint (1.35.1)

[error] 20-20: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/infrastructure/HttpProductRepository.java (2)

14-14: Consider using WebClient instead of RestTemplate

RestTemplate is in maintenance mode. Consider using WebClient which provides better support for async operations and is more modern.

-    private final RestTemplate restTemplate;
+    private final WebClient webClient;

     @Override
     public List<Product> findAll() {
-        final ProductsResponse products = restTemplate.getForObject(
-                "http://127.0.0.1:8082/api/v1/product", ProductsResponse.class);
-        return products.products();
+        return webClient.get()
+                .uri("/api/v1/product")
+                .retrieve()
+                .bodyToMono(ProductsResponse.class)
+                .map(ProductsResponse::products)
+                .block();
     }

1-22: Add circuit breaker for resilience

Since this is a critical component fetching data from an external service, consider adding a circuit breaker to handle failures gracefully.

Consider using Spring Cloud Circuit Breaker with Resilience4j:

@CircuitBreaker(name = "productService", fallbackMethod = "findAllFallback")
@Override
public List<Product> findAll() {
    // existing implementation
}

private List<Product> findAllFallback(Exception e) {
    log.error("Circuit breaker activated for product service", e);
    // Return cached data or empty list depending on your requirements
    return Collections.emptyList();
}

Add circuit breaker configuration to application.yaml:

resilience4j.circuitbreaker:
  instances:
    productService:
      slidingWindowSize: 10
      failureRateThreshold: 50
      waitDurationInOpenState: 10000
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/resources/application.yml (1)

1-23: Consider implementing shared configuration management

The configuration is identical to the catalog module, which indicates:

  1. Potential maintenance overhead with duplicate configurations
  2. Risk of configuration drift between modules
  3. Same security and configuration issues as noted in the catalog module

Consider these improvements:

  1. Create a shared base configuration file
  2. Use Spring Cloud Config Server for centralized configuration management
  3. Implement different ports for each module
  4. Extract common properties to a shared configuration

Example structure:

# application-common.yml (shared properties)
spring:
  jpa:
    properties:
      hibernate:
        format_sql: ${FORMAT_SQL:false}
        show_sql: ${SHOW_SQL:false}

# application.yml (module-specific)
spring:
  config:
    import: application-common.yml
  datasource:
    url: ${DB_URL}
    username: ${DB_USERNAME}
    password: ${DB_PASSWORD}
  
server:
  port: ${SERVER_PORT:8083}  # Different port for order module
🧰 Tools
🪛 yamllint (1.35.1)

[error] 23-23: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/domain/ProductRepository.java (1)

1-8: Review naming and package structure across modules.

The project has two different ProductRepository interfaces in different modules:

  1. com.example.infra.catalog.ProductRepository in the order module
  2. com.example.domain.ProductRepository in the display module

This could lead to confusion and potential issues. Consider:

  1. Renaming repositories to reflect their specific contexts
  2. Establishing consistent package naming conventions across modules
  3. Documenting the responsibility boundaries between modules

Suggested naming convention:

  • Order module: CatalogProductRepository
  • Display module: DisplayProductRepository
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/catalog/Product.java (1)

1-2: Consider moving this DTO to a shared module for better modularity.

The Product record in the order.infra.catalog package suggests cross-module communication. In a modular monolith, consider creating a shared module for these DTOs to make the module boundaries more explicit and prevent circular dependencies.

playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/domain/ProductRepository.java (1)

1-7: Consider adding repository documentation.

Add Javadoc to document the repository's purpose and any caching behavior that will be implemented. This will help other developers understand the repository's role in the modular monolith architecture.

+/**
+ * Repository for Product entities with support for CRUD operations.
+ * This repository is part of the catalog module and includes caching support
+ * for frequently accessed data.
+ */
public interface ProductRepository extends JpaRepository<Product, Long> {
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/domain/Product.java (1)

1-2: Consider moving this record to a dedicated DTO package

While Java records are excellent for immutable data structures, this Product record appears to be used for data transfer between modules. Consider:

  1. Moving it to a .dto package to better reflect its role
  2. Renaming it to ProductDto to clearly indicate its purpose

Also applies to: 3-10

playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderLineMapper.java (2)

3-3: Consider moving OrderSheetItem to domain package

The import of OrderSheetItem from the application layer into the domain layer violates clean architecture principles. The domain layer should not depend on outer layers.

Consider moving OrderSheetItem to the domain package or creating a domain-specific model.


6-9: Add interface documentation

Consider adding Javadoc to document:

  • The purpose of this mapper interface
  • The contract of the map method
  • Any validation or business rules that implementations should follow
+/**
+ * Maps order sheet items to order lines as part of the order processing flow.
+ */
 public interface OrderLineMapper {
+    /**
+     * Converts a list of order sheet items into order lines.
+     * @param orderSheetItems the items to convert
+     * @return the converted order lines
+     */
     List<OrderLine> map(List<OrderSheetItem> orderSheetItems);
 }
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/application/dto/ProductResponse.java (2)

3-11: Consider aligning field names with display module

The id field name differs from the display module's productId. Consider aligning these names across modules for consistency, or document the intentional difference if it serves a specific purpose.

 public record ProductResponse(
-        Long id,
+        Long productId,
         Long brandId,
         Long categoryId,
         String name,
         int price,
         String description) {

3-11: Add Javadoc to clarify module-specific DTO purpose

This DTO differs from the display module's version. Add documentation to explain its specific role in the catalog context and why it contains a subset of fields.

+/**
+ * Represents the essential product data within the catalog module.
+ * This DTO contains core product attributes without extended information
+ * like brand and category names that are handled by the display module.
+ */
 public record ProductResponse(
         Long id,
         Long brandId,
         Long categoryId,
         String name,
         int price,
         String description) {
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/dto/ProductResponse.java (2)

3-13: Add validation annotations for client-facing DTO

Since this DTO is likely used in client-facing responses, consider adding validation annotations to ensure data integrity.

+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Min;
+
 public record ProductResponse(
+        @NotNull
         Long productId,
+        @NotNull
         Long brandId,
+        @NotNull
         String brandName,
+        @NotNull
         Long categoryId,
+        @NotNull
         String categoryName,
+        @NotNull
         String productName,
+        @Min(0)
         int price,
         String description
 ) {

3-13: Document caching considerations for denormalized data

The inclusion of brandName and categoryName suggests denormalization for performance. Consider documenting caching strategies or refresh policies for these denormalized fields.

Would you like me to help create a caching configuration for this use case?

playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderStatus.java (1)

3-12: Consider enhancing enum documentation and state management

While the enum covers the complete order lifecycle, consider these improvements:

  1. Add English translations alongside Korean comments for better international collaboration
  2. Add @Javadoc to document:
    • The default/initial state
    • Valid state transitions
    • Business rules for state changes
 public enum OrderStatus {
-    CANCELED, // 주문이 취소된 상태
-    PENDING,        // 주문이 대기 중인 상태 (결제 대기 등)
-    CONFIRMED,      // 주문이 확인된 상태
-    PROCESSING,     // 주문이 처리 중인 상태
-    SHIPPED,        // 주문이 발송된 상태
-    DELIVERED,      // 주문이 배송 완료된 상태
-    RETURNED,       // 주문이 반품된 상태
-    COMPLETED       // 주문이 최종 완료된 상태
+    /**
+     * Order states and their transitions:
+     * PENDING (Initial) → CONFIRMED → PROCESSING → SHIPPED → DELIVERED → COMPLETED
+     *         ↓                                              ↓
+     *      CANCELED                                      RETURNED
+     */
+    CANCELED,  // 주문이 취소된 상태 (Order is canceled)
+    PENDING,   // 주문이 대기 중인 상태 (Order is pending, awaiting payment)
+    CONFIRMED, // 주문이 확인된 상태 (Order is confirmed)
+    PROCESSING,// 주문이 처리 중인 상태 (Order is being processed)
+    SHIPPED,   // 주문이 발송된 상태 (Order has been shipped)
+    DELIVERED, // 주문이 배송 완료된 상태 (Order has been delivered)
+    RETURNED,  // 주문이 반품된 상태 (Order has been returned)
+    COMPLETED  // 주문이 최종 완료된 상태 (Order is completed)
 }
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/ui/DisplayController.java (1)

11-13: Consider using @tag for API documentation

Add Swagger/OpenAPI documentation tags to improve API discoverability and documentation.

+@Tag(name = "Display", description = "Display API for product listing")
 @RestController
 @RequiredArgsConstructor
 public class DisplayController {
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/ui/OrderController.java (1)

1-22: Add API documentation and improve versioning strategy

Consider the following improvements:

  1. Add OpenAPI/Swagger annotations for API documentation
  2. Move API version to request header or accept header instead of URL path
  3. Add controller-level request mapping for base path

Example implementation:

+@Tag(name = "Order Management", description = "APIs for managing orders")
 @RestController
+@RequestMapping("/api/order")
 @RequiredArgsConstructor
 public class OrderController {
     private final OrderManager orderManager;

+    @Operation(summary = "Create new order", description = "Creates a new order from the provided order sheet")
+    @ApiResponse(responseCode = "200", description = "Order created successfully")
+    @ApiResponse(responseCode = "400", description = "Invalid input")
     @PostMapping
     public ResponseEntity<OrderResponse> order(
         @Valid @RequestBody OrderSheet orderSheet,
+        @RequestHeader(name = "Api-Version", defaultValue = "1") Integer apiVersion
     ) {
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/application/OrderManager.java (1)

16-17: Add final keyword to fields

The fields should be marked as final since they're injected through constructor injection:

-    private OrderRepository orderRepository;
-    private OrderLineMapper orderLineMapper;
+    private final OrderRepository orderRepository;
+    private final OrderLineMapper orderLineMapper;
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderProduct.java (1)

1-27: Consider implementing caching strategy

Given the PR objective to introduce caching, consider implementing a caching strategy for product details to improve performance:

  1. Add caching annotations:
+@Cacheable(cacheNames = "orderProducts", key = "#productId")
+public static OrderProduct from(Product product) {
+    return new OrderProduct(
+        product.getId(),
+        product.getName(),
+        product.getPrice()
+    );
+}
  1. Configure cache:
@Configuration
@EnableCaching
public class CacheConfig {
    @Bean
    public CacheManager cacheManager() {
        return new ConcurrentMapCacheManager("orderProducts");
    }
}
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/ui/ProductController.java (2)

17-25: Consider implementing caching for product data

Since product data doesn't change frequently, implementing caching here would improve performance and align with the PR's caching objectives.

Consider adding Spring Cache annotations:

+ import org.springframework.cache.annotation.Cacheable;

  @GetMapping("/api/v1/product/{productId}")
+ @Cacheable(value = "products", key = "#productId")
  public ProductResponse find(@PathVariable Long productId) {
      // ... existing code
  }

  @GetMapping("/api/v1/product")
+ @Cacheable(value = "allProducts")
  public ProductsResponse findAll() {
      // ... existing code
  }

1-26: Add API documentation using OpenAPI/Swagger

The controller lacks API documentation, which is essential for API consumers.

Add OpenAPI annotations:

+ import io.swagger.v3.oas.annotations.Operation;
+ import io.swagger.v3.oas.annotations.tags.Tag;

+ @Tag(name = "Product", description = "Product management APIs")
  @RestController
  @RequiredArgsConstructor
  public class ProductController {
      // ...
      
+     @Operation(summary = "Find product by ID",
+               description = "Retrieves a product by its unique identifier")
      @GetMapping("/api/v1/product/{productId}")
      // ...

+     @Operation(summary = "Find all products",
+               description = "Retrieves a list of all available products")
      @GetMapping("/api/v1/product")
      // ...
  }
playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderLine.java (1)

39-41: Rename method to better reflect its purpose

The method name setProduct is misleading as it sets the order reference, not the product.

Rename the method:

- public void setProduct(final Order order) {
+ public void setOrder(final Order order) {
      this.order = order;
  }
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/DisplayManager.java (2)

14-20: Consider adding repository validation and error handling.

The class structure is clean, but consider adding the following improvements:

  1. Validate repository dependencies in a @PostConstruct method
  2. Add exception handling for repository operations
  3. Consider using repository interfaces from a common module for better modularity
 @Service
 @RequiredArgsConstructor
 public class DisplayManager {
     private final ProductRepository productRepository;
     private final BrandRepository brandRepository;
     private final CategoryRepository categoryRepository;
+
+    @PostConstruct
+    void validateRepositories() {
+        Assert.notNull(productRepository, "ProductRepository must not be null");
+        Assert.notNull(brandRepository, "BrandRepository must not be null");
+        Assert.notNull(categoryRepository, "CategoryRepository must not be null");
+    }

22-39: Implement caching as per PR objectives.

The PR objectives mention caching, but it's not implemented. Consider adding caching to improve performance:

+    @Cacheable(value = "products", key = "#pageable")
+    public Page<ProductResponse> findAllProduct(Pageable pageable) {

Also, consider these caching strategies:

  1. Cache individual entities (brands, categories) separately
  2. Implement cache eviction policies
  3. Use Redis or Caffeine as cache provider
  4. Add cache configuration in a separate configuration class

Would you like me to provide a complete caching implementation example?

playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/application/dto/CategoryResponse.java (2)

1-8: Add documentation and validation for better API contract

The record implementation is clean and appropriate for a DTO. Consider these enhancements:

+ import jakarta.validation.constraints.NotNull;
+ import io.swagger.v3.oas.annotations.media.Schema;

/**
 * Response DTO for Category information.
 */
public record CategoryResponse(
+        @NotNull
+        @Schema(description = "Category identifier", example = "1")
         Long id,
         
+        @NotNull
+        @Schema(description = "Category name", example = "Electronics")
         String name
) {
+    /**
+     * Creates a new CategoryResponse from a Category entity.
+     *
+     * @param category the category entity
+     * @return a new CategoryResponse
+     */
+    public static CategoryResponse from(Category category) {
+        return new CategoryResponse(
+            category.getId(),
+            category.getName()
+        );
+    }
}

These changes would:

  1. Add OpenAPI documentation for API consumers
  2. Include validation annotations for REST endpoints
  3. Provide a factory method for clean entity conversion

1-1: Consider implementing caching strategy

Since one of the PR objectives is to introduce caching, consider implementing Spring Cache abstraction for the repositories:

  1. Add caching configuration to each module:
@Configuration
@EnableCaching
public class CacheConfig extends CachingConfigurerSupport {
    @Bean
    public CacheManager cacheManager() {
        return new ConcurrentMapCacheManager("brands", "categories");
    }
}
  1. Apply caching to repository methods:
@Cacheable(value = "brands", key = "#id")
Optional<Brand> findById(Long id);
  1. Consider using Redis or Caffeine for production-grade caching:
implementation 'org.springframework.boot:spring-boot-starter-data-redis'
// or
implementation 'com.github.ben-manes.caffeine:caffeine'

Would you like me to create a detailed implementation guide for the caching strategy?

playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/domain/BrandRepository.java (1)

1-7: Consider adding caching for brand lookups

Since brand data typically changes infrequently, consider implementing caching to improve performance. This aligns with the PR's pending objective of introducing caching.

Example implementation using Spring's caching annotations:

+import org.springframework.cache.annotation.Cacheable;

 public interface BrandRepository extends JpaRepository<Brand, Long> {
+    @Cacheable(value = "brands", key = "#id")
+    Optional<Brand> findById(Long id);
 }

Don't forget to enable caching in your configuration:

@EnableCaching
@Configuration
public class CacheConfig {
    // Cache configuration
}
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/exception/BrandIdNotFoundException.java (1)

1-8: Consider implementing message internationalization

While the error message is clear, hardcoding Korean text directly in the exception might cause issues for international users or systems.

Consider using Spring's MessageSource for internationalization:

+import org.springframework.context.MessageSource;
+import org.springframework.context.i18n.LocaleContextHolder;

 public class BrandIdNotFoundException extends RuntimeException {
+    private static final String MESSAGE_KEY = "error.brand.not.found";
+    private final MessageSource messageSource;
 
     public BrandIdNotFoundException(final Long id) {
-        super("브랜드를 찾을 수 없습니다. id: " + id);
+        super(messageSource.getMessage(
+            MESSAGE_KEY,
+            new Object[]{id},
+            LocaleContextHolder.getLocale()
+        ));
     }
 }

Add corresponding message properties files:

# messages.properties (default)
error.brand.not.found=Brand not found with id: {0}

# messages_ko.properties
error.brand.not.found=브랜드를 찾을 수 없습니다. id: {0}
playground/hoa0217/java-springboot-order-perf-multi-module/brand/build.gradle (1)

2-12: Consider adding version catalog for dependency management

While Spring Boot's dependency management handles versions, consider introducing a version catalog in the root project for better version control across modules. This becomes especially important as the project grows.

// In root project's settings.gradle or build.gradle
+ dependencyResolutionManagement {
+     versionCatalogs {
+         libs {
+             version('spring-boot', '2.7.0') // adjust version as needed
+             library('spring-boot-web', 'org.springframework.boot', 'spring-boot-starter-web').versionRef('spring-boot')
+             // ... other dependencies
+         }
+     }
+ }

// In module's build.gradle
 dependencies {
     implementation project(':common')
-    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation libs.spring.boot.web
     // ... other dependencies
 }
playground/hoa0217/java-springboot-order-perf-multi-module/category/build.gradle (1)

2-12: Consider extracting common build logic

The build configuration is identical across modules. Consider extracting common build logic to a shared script or convention plugin to maintain consistency and reduce duplication.

// Create buildSrc/src/main/groovy/com.example.java-common-conventions.gradle
+ plugins {
+     id 'java'
+ }
+ 
+ dependencies {
+     implementation project(':common')
+     implementation 'org.springframework.boot:spring-boot-starter-web'
+     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+     implementation 'org.springframework.boot:spring-boot-starter-validation'
+     runtimeOnly 'com.h2database:h2'
+ }

// In each module's build.gradle
+ plugins {
+     id 'com.example.java-common-conventions'
+ }
- dependencies {
-     implementation project(':common')
-     ...
- }
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/ui/BrandController.java (1)

16-19: Enhance API documentation and error handling.

The endpoint would benefit from proper documentation and explicit HTTP status handling.

Consider adding these improvements:

+@Operation(summary = "Find brand by ID", description = "Retrieves brand information by its unique identifier")
+@ApiResponse(responseCode = "200", description = "Brand found successfully")
+@ApiResponse(responseCode = "404", description = "Brand not found")
 @GetMapping("/api/v1/brand/{brandId}")
+@ResponseStatus(HttpStatus.OK)
 public BrandResponse find(@PathVariable Long brandId) {
+    if (brandId <= 0) {
+        throw new IllegalArgumentException("Brand ID must be positive");
+    }
     return brandManager.findBrand(brandId);
 }
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/domain/Brand.java (1)

12-16: Consider adding an index on the name field.

If you frequently query brands by name, adding an index would improve query performance.

Add an index definition:

 @Table(name = "brand")
+@Table(name = "brand", indexes = {
+    @Index(name = "idx_brand_name", columnList = "name")
+})
 @Entity
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/domain/Category.java (2)

16-26: Consider implementing category hierarchy support.

Categories often have parent-child relationships. Consider adding support for this common requirement.

Example implementation:

 public class Category extends BaseEntity {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;

-    private String name;
+    @Column(nullable = false, length = 100)
+    @NotBlank(message = "Category name is required")
+    private String name;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "parent_id")
+    private Category parent;
+
+    @OneToMany(mappedBy = "parent")
+    private Set<Category> children = new HashSet<>();
+
+    public Category(final String name, final Category parent) {
+        this.name = name;
+        this.parent = parent;
+    }

     public Category(final String name) {
         this.name = name;
     }
 }

1-27: Consider extracting common entity patterns.

Both Brand and Category entities share similar patterns. Consider extracting common functionality into a shared abstract class or interface.

Consider creating a NamedEntity abstract class:

@MappedSuperclass
@Getter
public abstract class NamedEntity extends BaseEntity {
    @Column(nullable = false, length = 100)
    @NotBlank(message = "Name is required")
    protected String name;

    protected NamedEntity(String name) {
        this.name = name;
    }

    protected NamedEntity() {
    }
}

Then both Brand and Category could extend this class:

-public class Category extends BaseEntity {
+public class Category extends NamedEntity {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
-
-    private String name;

     public Category(final String name) {
-        this.name = name;
+        super(name);
     }
 }
playground/hoa0217/java-springboot-order-perf-multi-module/common/src/main/java/com/example/domain/BaseEntity.java (1)

18-18: Consider timezone handling for distributed systems

The FORMATTER constant doesn't specify a timezone, which could cause issues in distributed systems. Consider using UTC consistently.

-    public static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");
+    public static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss").withZone(ZoneOffset.UTC);
playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/resources/application.yml (2)

19-20: Add newline at end of file

Add a newline character at the end of the file to comply with POSIX standards.

 server:
   port: 8080
+
🧰 Tools
🪛 yamllint (1.35.1)

[error] 20-20: no new line character at the end of file

(new-line-at-end-of-file)


1-20: Consider environment-specific configurations

Move environment-specific settings to separate profile-based configuration files (e.g., application-dev.yml, application-prod.yml).

This helps maintain clear separation between development and production configurations, especially for:

  • Database settings
  • H2 console access
  • SQL logging
  • Cache settings
🧰 Tools
🪛 yamllint (1.35.1)

[error] 20-20: no new line character at the end of file

(new-line-at-end-of-file)

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  • playground/hoa0217/java-springboot-order-perf-multi-module/gradlew (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/gradlew.bat (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/build.gradle (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/OrderApplication.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/application/OrderManager.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/application/dto/OrderSheet.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/application/dto/OrderSheetItem.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/Order.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderLine.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderLineMapper.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderProduct.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderRepository.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderStatus.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/ShippingDesk.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/OrderCatalogHandler.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/catalog/HttpProductRepository.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/catalog/Product.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/catalog/ProductRepository.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/ui/OrderController.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/resources/application.yml (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/settings.gradle (1 hunks)
✅ Files skipped from review due to trivial changes (23)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/OrderRepository.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/BrandApplication.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/application/dto/BrandResponse.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/.gitattributes
  • playground/hoa0217/java-springboot-order-perf-multi-module/common/src/main/java/com/example/config/RestTemplateConfig.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/resources/schema.sql
  • playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/resources/schema.sql
  • playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/CatalogApplication.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/gradle/wrapper/gradle-wrapper.properties
  • playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/resources/data.sql
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/ShippingDesk.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/.gitignore
  • playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/resources/data.sql
  • playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/domain/CategoryRepository.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/DisplayApplication.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/OrderApplication.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/CategoryApplication.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/domain/Brand.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/domain/Category.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/gradlew.bat
  • playground/hoa0217/java-springboot-order-perf-multi-module/settings.gradle
  • playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/resources/data.sql
  • playground/hoa0217/java-springboot-order-perf-multi-module/gradlew
👮 Files not reviewed due to content moderation or server errors (6)
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/infra/OrderCatalogHandler.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/java/com/example/application/CatalogManager.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/java/com/example/domain/Order.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/ui/CategoryController.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/java/com/example/application/BrandManager.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/java/com/example/application/CategoryManager.java
🧰 Additional context used
🪛 yamllint (1.35.1)
playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/resources/application.yml

[error] 23-23: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/order/src/main/resources/application.yml

[error] 23-23: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/brand/src/main/resources/application.yml

[error] 20-20: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/resources/application.yml

[error] 20-20: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/resources/application.yml

[error] 2-2: no new line character at the end of file

(new-line-at-end-of-file)

🔇 Additional comments (6)
playground/hoa0217/java-springboot-order-perf-multi-module/common/build.gradle (1)

1-2: LGTM! Correct jar configuration for a common module

The configuration properly disables bootJar and enables jar, which is the recommended setup for a shared library module in a Spring Boot multi-module project.

playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/infrastructure/ProductsResponse.java (1)

1-10: Verify module dependencies and entity usage

Let's verify the module structure and dependencies to ensure proper architectural boundaries.

✅ Verification successful

Let me gather more information about the module structure and dependencies to verify the architectural boundaries.


Based on the analysis of the code, I can now provide a final response regarding the module dependencies and architectural boundaries.

Module dependencies are properly structured

The display module's usage of the Product entity follows a clean architecture pattern:

  • The Product is defined as a domain record in the display module (com.example.domain.Product)
  • The display module communicates with the catalog module through HTTP (HttpProductRepository)
  • The ProductsResponse is used as a DTO for inter-module communication
  • No direct compile-time dependencies between modules are observed
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check module dependencies and cross-module entity usage

# Check build.gradle files for module dependencies
echo "Checking module dependencies:"
fd --type f "build.gradle" --exec cat {}

# Check for any direct usage of Product entity across modules
echo -e "\nChecking for Product entity usage across modules:"
rg -l "import.*com.example.domain.Product" --type java

# Check for existing ProductResponse DTO usage
echo -e "\nChecking for ProductResponse DTO usage:"
rg -l "import.*ProductResponse" --type java

Length of output: 27065


Script:

#!/bin/bash
# Check module structure and Product entity definition
echo "Checking module structure and Product entity location:"
fd --type f "Product.java" --exec cat {}

# Check dependencies between display and catalog modules
echo -e "\nChecking build.gradle files for display and catalog modules:"
fd --type f "build.gradle" --exec grep -l "project(':display\|:catalog')" {} \; -exec cat {}

# Check for any direct usage of Product entity in display module
echo -e "\nChecking Product usage in display module:"
rg -C 3 "Product" playground/hoa0217/java-springboot-order-perf-multi-module/display/

Length of output: 30676

playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/resources/schema.sql (1)

1-12: Verify the impact of schema changes

Let's check if there are any existing records or dependencies that might be affected by these schema changes.

✅ Verification successful

Based on the search results, I can see that the schema changes in the review are part of a new module (catalog) and the fields being added (brand_id, category_id, price, description) are commonly used across multiple implementations in the codebase. The search shows:

  1. Multiple Product entities across different modules using these fields
  2. Various DTOs and response objects utilizing these fields
  3. Existing schema files with similar product table definitions

Let me verify one more aspect to ensure there are no conflicting schemas or migrations:


Schema changes are safe to proceed

The schema changes in the catalog module are well-aligned with existing implementations and won't cause any issues. The verification shows:

  1. The schema is isolated to the catalog module and creates a new product table
  2. The fields (brand_id, category_id, price, description) are consistently used across the codebase
  3. The module has proper test data and related tables (brand, category) are also defined
  4. The schema is compatible with existing product-related implementations in other modules
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check for existing implementations and dependencies

# Check for repository/service implementations using these columns
rg -A 5 "brand_id|category_id|price|description" --type java

# Check for existing migrations or other schema files
fd -e sql -x cat {} \; | grep -i "create.*product"

Length of output: 62449


Script:

#!/bin/bash
# Check for any existing schema files in the catalog module
fd . playground/hoa0217/java-springboot-order-perf-multi-module/catalog/src/main/resources -t f -x cat {}

# Check for any existing data.sql files that might contain product data
fd data.sql -x cat {}

Length of output: 29450

playground/hoa0217/java-springboot-order-perf-multi-module/category/src/main/resources/application.yml (1)

1-20: Verify database configuration across modules

Since this is a multi-module project sharing the same database, we should verify the database configurations across all modules for consistency.

✅ Verification successful

Database configurations are consistent with minor variations

The database configurations across modules are consistent in terms of core settings (URL, username, password, driver). However, there are some intentional variations:

  • catalog and order modules have additional Hikari connection pool settings
  • All modules use the same H2 in-memory database order-perf-optimizer
  • Basic authentication and driver settings are identical

The variations in Hikari settings appear to be intentional optimizations for modules that may require different connection pool configurations based on their specific load requirements.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check database configurations across all modules
# Expected: All modules should have consistent database configurations

# Find and display database configurations from all modules
fd -e yml -e yaml . | while read -r file; do
  echo "=== $file ==="
  yq '.spring.datasource' "$file" 2>/dev/null
done

Length of output: 13819


Script:

#!/bin/bash
# Let's try a different approach to check database configurations specifically in the multi-module project
# First, let's check all application.yml files in the multi-module project

echo "=== Checking database configurations in multi-module project ==="
for module in brand catalog category display order; do
  config_file="playground/hoa0217/java-springboot-order-perf-multi-module/$module/src/main/resources/application.yml"
  if [ -f "$config_file" ]; then
    echo "=== $module module ==="
    cat "$config_file" | grep -A 10 "spring:"
  fi
done

Length of output: 3445

🧰 Tools
🪛 yamllint (1.35.1)

[error] 20-20: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/order/build.gradle (2)

1-3: Verify the common module structure

The dependency on the common module aligns with the modular monolith architecture. Let's verify its structure to ensure proper separation of concerns.

✅ Verification successful

Common module dependency is properly structured

The common module is well-structured and contains appropriate shared components:

  • Base entity class for JPA entities
  • Common REST template configuration
  • Core Spring Boot dependencies (web and JPA starters)
  • Correctly configured as a library module (jar.enabled = true)

The dependency declaration in order/build.gradle is valid and follows the modular monolith architecture pattern.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the common module structure and its shared components

# Check if common module exists and list its structure
fd . "common/" -t f

# Check for potential circular dependencies
for module in $(find . -name "build.gradle" -not -path "*/common/*"); do
  echo "Checking $module for common module dependency..."
  grep -A 5 "dependencies" "$module" | grep "common"
done

Length of output: 8852


Script:

#!/bin/bash
# Let's verify the common module structure in the specific project directory

# Check if common module exists and its structure
fd . "playground/hoa0217/java-springboot-order-perf-multi-module/common" -t f

# Check common module's build.gradle content
if [ -f "playground/hoa0217/java-springboot-order-perf-multi-module/common/build.gradle" ]; then
    echo "=== Common module's build.gradle content ==="
    cat "playground/hoa0217/java-springboot-order-perf-multi-module/common/build.gradle"
fi

# Check for shared components in common module
if [ -d "playground/hoa0217/java-springboot-order-perf-multi-module/common/src" ]; then
    echo -e "\n=== Common module's source files ==="
    fd . "playground/hoa0217/java-springboot-order-perf-multi-module/common/src" -t f
fi

Length of output: 1374


9-12: 🛠️ Refactor suggestion

Verify Ehcache version and add configuration

While adding caching dependencies is good, we should:

  1. Verify if the fixed versions are up-to-date and secure
  2. Ensure proper cache configuration is in place

Add an Ehcache configuration file:

// order/src/main/java/config/CacheConfig.java
@Configuration
@EnableCaching
public class CacheConfig {
    @Bean
    public CacheManager cacheManager() {
        return new EhCacheCacheManager(ehCacheManager());
    }

    private net.sf.ehcache.CacheManager ehCacheManager() {
        // Configure cache settings
        CacheConfiguration orderCache = new CacheConfiguration()
            .eternal(false)
            .timeToLiveSeconds(3600)
            .timeToIdleSeconds(0)
            .memoryStoreEvictionPolicy("LRU");

        // Create cache manager
        net.sf.ehcache.config.Configuration config = new net.sf.ehcache.config.Configuration();
        config.addCache(orderCache);

        return net.sf.ehcache.CacheManager.newInstance(config);
    }
}

Comment on lines 4 to 8
dependencies {

implementation 'org.springframework.boot:spring-boot-starter-web'
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
}
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🛠️ Refactor suggestion

Reconsider dependencies in common module

The current dependencies might lead to architectural issues:

  • Including spring-boot-starter-web and spring-boot-starter-data-jpa in the common module creates unnecessary coupling
  • These starters bring in heavy transitive dependencies that may not be needed by all modules
  • This could violate the separation of concerns principle in a modular architecture

Consider moving these dependencies to specific modules where they are actually needed:

dependencies {
-    implementation 'org.springframework.boot:spring-boot-starter-web'
-    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    // Keep only essential shared dependencies
+    implementation 'org.springframework.boot:spring-boot-starter'
+    // Add specific utilities or shared models as needed
}

For better modularity:

  1. Move web-related dependencies to modules that expose REST endpoints
  2. Move JPA dependencies to modules that handle persistence
  3. Keep the common module focused on shared utilities, constants, and base classes
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
}
dependencies {
// Keep only essential shared dependencies
implementation 'org.springframework.boot:spring-boot-starter'
// Add specific utilities or shared models as needed
}

@@ -0,0 +1,10 @@
package com.example.infrastructure;

import com.example.domain.Product;
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⚠️ Potential issue

Critical: Avoid exposing domain entities across module boundaries

The display module should not directly depend on the domain entity Product from another module. This creates tight coupling and violates the modular monolith architecture principles.

Apply this diff to use the DTO instead:

-import com.example.domain.Product;
+import com.example.application.dto.ProductResponse;

 public record ProductsResponse(
-        List<Product> products
+        List<ProductResponse> products
 ) {

This change will:

  • Maintain proper module boundaries
  • Reduce coupling between modules
  • Follow the DTO pattern for inter-module communication

Also applies to: 7-7

Comment on lines +7 to +8
brand_id BIGINT NOT NULL,
category_id BIGINT NOT NULL,
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⚠️ Potential issue

Add foreign key constraints for data integrity

The brand_id and category_id columns should have FOREIGN KEY constraints to ensure referential integrity with their respective parent tables.

Apply this diff to add the constraints:

    brand_id BIGINT NOT NULL,
    category_id BIGINT NOT NULL,
+   FOREIGN KEY (brand_id) REFERENCES brand(id),
+   FOREIGN KEY (category_id) REFERENCES category(id)

Committable suggestion skipped: line range outside the PR's diff.

Comment on lines +14 to +17
h2:
console:
enabled: true
path: '/h2-console'
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⚠️ Potential issue

Secure H2 console configuration

The H2 console is enabled with default path, which could be a security risk if accidentally left enabled in production.

Consider these security measures:

  1. Disable H2 console for production
  2. Use a non-default path
  3. Add Spring profile condition
  h2:
    console:
-     enabled: true
-     path: '/h2-console'
+     enabled: ${H2_CONSOLE_ENABLED:false}
+     path: ${H2_CONSOLE_PATH:/h2-console-category}
+     settings:
+       web-allow-others: false
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
h2:
console:
enabled: true
path: '/h2-console'
h2:
console:
enabled: ${H2_CONSOLE_ENABLED:false}
path: ${H2_CONSOLE_PATH:/h2-console-category}
settings:
web-allow-others: false

Comment on lines +3 to +6
url: 'jdbc:h2:mem:order-perf-optimizer'
username: 'user'
password: ''
driver-class-name: org.h2.Driver
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⚠️ Potential issue

Enhance database security configuration

The current database configuration has security concerns:

  1. Empty password
  2. Default username
  3. In-memory database without persistence

Consider applying these security enhancements:

  datasource:
    url: 'jdbc:h2:mem:order-perf-optimizer'
-   username: 'user'
-   password: ''
+   username: ${DB_USERNAME}
+   password: ${DB_PASSWORD}
    driver-class-name: org.h2.Driver

Committable suggestion skipped: line range outside the PR's diff.

Comment on lines +27 to +36
dependencies { // 모든 하위 모듈에 추가 될 의존성 목록입니다.

// test
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testRuntimeOnly 'org.junit.platform:junit-platform-launcher'

// lombok
compileOnly 'org.projectlombok:lombok'
annotationProcessor 'org.projectlombok:lombok'
}
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🛠️ Refactor suggestion

Add caching dependencies and version management

  1. Add Spring Cache support since caching is mentioned in PR objectives
  2. Consider adding version management for Lombok to ensure consistency across modules
 dependencies {
+    // caching
+    implementation 'org.springframework.boot:spring-boot-starter-cache'
+    implementation 'org.springframework.boot:spring-boot-starter-data-redis'
 
     // test
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 
     // lombok
+    ext.lombokVersion = '1.18.30'
-    compileOnly 'org.projectlombok:lombok'
-    annotationProcessor 'org.projectlombok:lombok'
+    compileOnly "org.projectlombok:lombok:${lombokVersion}"
+    annotationProcessor "org.projectlombok:lombok:${lombokVersion}"
 }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
dependencies { // 모든 하위 모듈에 추가 될 의존성 목록입니다.
// test
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
// lombok
compileOnly 'org.projectlombok:lombok'
annotationProcessor 'org.projectlombok:lombok'
}
dependencies { // 모든 하위 모듈에 추가 될 의존성 목록입니다.
// caching
implementation 'org.springframework.boot:spring-boot-starter-cache'
implementation 'org.springframework.boot:spring-boot-starter-data-redis'
// test
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
// lombok
ext.lombokVersion = '1.18.30'
compileOnly "org.projectlombok:lombok:${lombokVersion}"
annotationProcessor "org.projectlombok:lombok:${lombokVersion}"
}

Comment on lines +33 to +35
public void onPreUpdate() {
this.updatedAt = LocalDateTime.parse(LocalDateTime.now().format(FORMATTER));
}
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⚠️ Potential issue

Fix JPA lifecycle method annotation and timestamp handling

  1. The method needs @PreUpdate annotation to be triggered by JPA
  2. Same unnecessary timestamp formatting/parsing issue
+import jakarta.persistence.PreUpdate;

+@PreUpdate
 public void onPreUpdate() {
-    this.updatedAt = LocalDateTime.parse(LocalDateTime.now().format(FORMATTER));
+    this.updatedAt = LocalDateTime.now();
 }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
public void onPreUpdate() {
this.updatedAt = LocalDateTime.parse(LocalDateTime.now().format(FORMATTER));
}
@PreUpdate
public void onPreUpdate() {
this.updatedAt = LocalDateTime.now();
}

Comment on lines +28 to +31
protected BaseEntity() {
this.createdAt = LocalDateTime.parse(LocalDateTime.now().format(FORMATTER));
this.updatedAt = this.createdAt;
}
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🛠️ Refactor suggestion

Optimize timestamp handling in constructor

The current implementation unnecessarily formats and parses the timestamp, which impacts performance and could introduce precision loss.

 protected BaseEntity() {
-    this.createdAt = LocalDateTime.parse(LocalDateTime.now().format(FORMATTER));
-    this.updatedAt = this.createdAt;
+    this.createdAt = LocalDateTime.now();
+    this.updatedAt = this.createdAt;
 }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
protected BaseEntity() {
this.createdAt = LocalDateTime.parse(LocalDateTime.now().format(FORMATTER));
this.updatedAt = this.createdAt;
}
protected BaseEntity() {
this.createdAt = LocalDateTime.now();
this.updatedAt = this.createdAt;
}

Comment on lines +14 to +17
h2:
console:
enabled: true
path: '/h2-console'
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⚠️ Potential issue

Secure H2 console for production environments

The H2 console should not be enabled in production as it poses a security risk.

   h2:
     console:
-      enabled: true
+      enabled: ${H2_CONSOLE_ENABLED:false}
       path: '/h2-console'
+    settings:
+      web-allow-others: false
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Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
h2:
console:
enabled: true
path: '/h2-console'
h2:
console:
enabled: ${H2_CONSOLE_ENABLED:false}
path: '/h2-console'
settings:
web-allow-others: false

Comment on lines +1 to +14
spring:
datasource:
url: 'jdbc:h2:mem:order-perf-optimizer'
username: 'user'
password: ''
driver-class-name: org.h2.Driver
jpa:
hibernate:
ddl-auto: none
properties:
hibernate:
format_sql: true
show_sql: true
h2:
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🛠️ Refactor suggestion

Add caching configuration and connection pool settings

  1. Add Redis caching configuration since caching is mentioned in PR objectives
  2. Configure HikariCP connection pool for better performance
 spring:
+  cache:
+    type: redis
+  redis:
+    host: localhost
+    port: 6379
   datasource:
     url: 'jdbc:h2:mem:order-perf-optimizer'
     username: 'user'
     password: ''
     driver-class-name: org.h2.Driver
+    hikari:
+      maximum-pool-size: 10
+      minimum-idle: 5
+      idle-timeout: 300000
   jpa:
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Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
spring:
datasource:
url: 'jdbc:h2:mem:order-perf-optimizer'
username: 'user'
password: ''
driver-class-name: org.h2.Driver
jpa:
hibernate:
ddl-auto: none
properties:
hibernate:
format_sql: true
show_sql: true
h2:
spring:
cache:
type: redis
redis:
host: localhost
port: 6379
datasource:
url: 'jdbc:h2:mem:order-perf-optimizer'
username: 'user'
password: ''
driver-class-name: org.h2.Driver
hikari:
maximum-pool-size: 10
minimum-idle: 5
idle-timeout: 300000
jpa:
hibernate:
ddl-auto: none
properties:
hibernate:
format_sql: true
show_sql: true
h2:

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Actionable comments posted: 5

🧹 Outside diff range and nitpick comments (6)
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/resources/application.yml (2)

6-7: Consider documenting port allocation strategy

As part of the architectural improvements mentioned in the PR objectives, consider documenting the port allocation strategy for different modules (e.g., in README.md). This helps maintain consistency across the modular monolith.

🧰 Tools
🪛 yamllint (1.35.1)

[error] 7-7: no new line character at the end of file

(new-line-at-end-of-file)


7-7: Add newline at end of file

Add a newline character at the end of the file to comply with YAML best practices.

server:
  port: 8083
+
🧰 Tools
🪛 yamllint (1.35.1)

[error] 7-7: no new line character at the end of file

(new-line-at-end-of-file)

playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/config/CacheEventLogger.java (1)

8-8: Consider using more specific type parameters

Instead of using Object for both key and value types, consider creating a bounded type parameter or using specific types based on your cache usage. This improves type safety and makes the code more self-documenting.

-public class CacheEventLogger implements CacheEventListener<Object, Object> {
+public class CacheEventLogger<K, V> implements CacheEventListener<K, V> {
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/resources/ehcache.xml (2)

8-27: Review cache configuration parameters

The current cache configuration might need adjustments:

  1. Consider increasing the heap size limit (currently 100 entries) based on your product catalog size
  2. Consider adding disk overflow configuration for better memory management
  3. Evaluate if 10 minutes TTL aligns with your data update frequency
   <cache alias="displayCache">
     <value-type>java.lang.Object</value-type>
     <expiry>
-      <ttl unit="minutes">10</ttl>
+      <ttl unit="minutes">5</ttl>
     </expiry>
     <resources>
-      <heap unit="entries">100</heap>
+      <heap unit="entries">1000</heap>
+      <disk unit="MB" persistent="false">100</disk>
     </resources>
   </cache>

14-22: Enhance cache event monitoring

Consider adding the UPDATED event to track cache modifications and using ORDERED event-ordering-mode for more reliable monitoring in high-load scenarios.

     <listeners>
       <listener>
         <class>com.example.config.CacheEventLogger</class>
         <event-firing-mode>ASYNCHRONOUS</event-firing-mode>
-        <event-ordering-mode>UNORDERED</event-ordering-mode>
+        <event-ordering-mode>ORDERED</event-ordering-mode>
         <events-to-fire-on>CREATED</events-to-fire-on>
         <events-to-fire-on>EXPIRED</events-to-fire-on>
+        <events-to-fire-on>UPDATED</events-to-fire-on>
       </listener>
     </listeners>
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/DisplayManager.java (1)

47-48: Consider key-based caching strategy

The current caching strategy caches the entire product list. Consider using more granular caching based on pagination parameters or specific product criteria.

-    @Cacheable(value = "displayCache")
+    @Cacheable(value = "displayCache", key = "#pageable.pageNumber + '_' + #pageable.pageSize")
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Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between 4824273 and 06514fe.

📒 Files selected for processing (13)
  • activity/week5/hoa0217/script/load-test.js (1 hunks)
  • activity/week5/hoa0217/script/smoke-test.js (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/common/build.gradle (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/build.gradle (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/DisplayManager.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/dto/ProductsResponse.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/config/CacheConfig.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/config/CacheEventLogger.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/domain/Products.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/infrastructure/HttpProductRepository.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/ui/DisplayController.java (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/resources/application.yml (1 hunks)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/resources/ehcache.xml (1 hunks)
✅ Files skipped from review due to trivial changes (2)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/dto/ProductsResponse.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/config/CacheConfig.java
🚧 Files skipped from review as they are similar to previous changes (3)
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/infrastructure/HttpProductRepository.java
  • playground/hoa0217/java-springboot-order-perf-multi-module/display/build.gradle
  • playground/hoa0217/java-springboot-order-perf-multi-module/common/build.gradle
🧰 Additional context used
🪛 yamllint (1.35.1)
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/resources/application.yml

[error] 7-7: no new line character at the end of file

(new-line-at-end-of-file)

🔇 Additional comments (4)
playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/ui/DisplayController.java (2)

16-19: ⚠️ Potential issue

Previous pagination concerns remain unaddressed

The implementation still lacks pagination and error handling, which could lead to performance issues with large datasets.

Apply this diff to implement pagination and error handling:

-    @GetMapping("/api/v1/display")
-    public ResponseEntity<ProductsResponse> display() {
-        return ResponseEntity.ok(displayManager.findAllProduct());
+    @GetMapping("/api/v1/display")
+    public ResponseEntity<ProductsResponse> display(
+            @RequestParam(defaultValue = "0") int page,
+            @RequestParam(defaultValue = "20") int size) {
+        try {
+            return ResponseEntity.ok(displayManager.findAllProduct(page, size));
+        } catch (Exception e) {
+            log.error("Error fetching products: {}", e.getMessage(), e);
+            return ResponseEntity.internalServerError().build();
+        }
     }

21-24: ⚠️ Potential issue

Improve cache implementation with proper configuration

The cache endpoint needs proper cache configuration and error handling. Also, consider using cache key parameters for more granular caching.

Apply this diff to improve the cache implementation:

-    @GetMapping("/api/v1/display/cache")
-    public ResponseEntity<ProductsResponse> displayCache() {
-        return ResponseEntity.ok(displayManager.findAllProductCache());
+    @GetMapping("/api/v1/display/cache")
+    @Cacheable(value = "products_cache", key = "#page + '_' + #size")
+    public ResponseEntity<ProductsResponse> displayCache(
+            @RequestParam(defaultValue = "0") int page,
+            @RequestParam(defaultValue = "20") int size) {
+        try {
+            return ResponseEntity.ok(displayManager.findAllProductCache(page, size));
+        } catch (Exception e) {
+            log.error("Error fetching cached products: {}", e.getMessage(), e);
+            return ResponseEntity.internalServerError().build();
+        }
     }

Likely invalid or redundant comment.

playground/hoa0217/java-springboot-order-perf-multi-module/display/src/main/java/com/example/application/DisplayManager.java (2)

26-27: Add pagination support

Loading all products at once could lead to performance issues with large datasets.


26-45: 🛠️ Refactor suggestion

Refactor to eliminate code duplication

Both methods have identical implementation. Consider extracting the common logic into a private method.

     public ProductsResponse findAllProduct() {
+        return findAllProductsInternal();
+    }
+
+    @Cacheable(value = "displayCache")
+    public ProductsResponse findAllProductCache() {
+        return findAllProductsInternal();
+    }
+
+    private ProductsResponse findAllProductsInternal() {
         final List<Product> products = productRepository.findAll();
         log.info("find success: " + products.size());
-        final List<ProductResponse> responses = products.stream()
-                .map(product -> {
-                    final Brand brand = brandRepository.findById(product.brandId());
-                    final Category category = categoryRepository.findById(product.categoryId());
-                    return new ProductResponse(
-                            product.id(),
-                            brand.id(),
-                            brand.name(),
-                            category.id(),
-                            category.name(),
-                            product.name(),
-                            product.price(),
-                            product.description()
-                    );
-                }).toList();
-        return new ProductsResponse(responses);
-    }
-
-    @Cacheable(value = "displayCache")
-    public ProductsResponse findAllProductCache() {
-        final List<Product> products = productRepository.findAll();
-        log.info("find success: " + products.size());
+
+        // Fetch brands and categories in bulk to avoid N+1 queries
+        List<Long> brandIds = products.stream().map(Product::brandId).distinct().toList();
+        List<Long> categoryIds = products.stream().map(Product::categoryId).distinct().toList();
+        
+        Map<Long, Brand> brandMap = brandRepository.findAllById(brandIds).stream()
+                .collect(Collectors.toMap(Brand::id, Function.identity()));
+        Map<Long, Category> categoryMap = categoryRepository.findAllById(categoryIds).stream()
+                .collect(Collectors.toMap(Category::id, Function.identity()));
+
         final List<ProductResponse> responses = products.stream()
                 .map(product -> {
-                    final Brand brand = brandRepository.findById(product.brandId());
-                    final Category category = categoryRepository.findById(product.categoryId());
+                    final Brand brand = Optional.ofNullable(brandMap.get(product.brandId()))
+                            .orElseThrow(() -> new EntityNotFoundException("Brand not found: " + product.brandId()));
+                    final Category category = Optional.ofNullable(categoryMap.get(product.categoryId()))
+                            .orElseThrow(() -> new EntityNotFoundException("Category not found: " + product.categoryId()));
                     return new ProductResponse(
                             product.id(),
                             brand.id(),

Also applies to: 47-67

Comment on lines +1 to +4
spring:
cache:
jcache:
config: classpath:ehcache.xml
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💡 Codebase verification

Fix duplicate ehcache.xml configuration

The ehcache.xml file exists but contains duplicate configurations that are concatenated together. This needs to be fixed:

  • First configuration defines displayCache with com.example.config.CacheEventLogger
  • Second configuration defines orderCache with com.order.perf.config.CacheEventLogger
  • Both configurations are complete XML documents with duplicate XML headers and schema declarations
  • Contains duplicate HTML comments referencing Baeldung tutorial
🔗 Analysis chain

Verify ehcache.xml configuration file exists

The cache configuration references classpath:ehcache.xml. Let's verify this file exists and contains proper cache settings.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Check if ehcache.xml exists and show its content
fd -t f "ehcache.xml" | xargs cat

Length of output: 2095

Comment on lines +5 to +9
public record Products(
List<Product> products
) {

}
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🛠️ Refactor suggestion

Consider adding defensive copying for the products list

The current implementation might allow external modification of the internal list. Consider:

  1. Defensive copying in the constructor
  2. Returning unmodifiable list if a getter is needed
  3. Adding utility methods for common operations
public record Products(
        List<Product> products
) {
+    public Products {
+        products = List.copyOf(products); // Defensive copy and make unmodifiable
+    }
+
+    // Utility methods
+    public int size() {
+        return products.size();
+    }
+
+    public boolean isEmpty() {
+        return products.isEmpty();
+    }
}
📝 Committable suggestion

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Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
public record Products(
List<Product> products
) {
}
public record Products(
List<Product> products
) {
public Products {
products = List.copyOf(products); // Defensive copy and make unmodifiable
}
// Utility methods
public int size() {
return products.size();
}
public boolean isEmpty() {
return products.isEmpty();
}
}

Comment on lines +11 to +14
public void onEvent(CacheEvent<?, ?> cacheEvent) {
log.info("Cache event occurred. Key: {}, Old Value: {}, New Value: {}",
cacheEvent.getKey(), cacheEvent.getOldValue(), cacheEvent.getNewValue());
}
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🛠️ Refactor suggestion

Consider adjusting logging strategy for production

A few suggestions for the logging implementation:

  1. Consider using DEBUG level for cache events to avoid log spam in production
  2. Add structured logging fields for better log aggregation
  3. Consider adding metrics collection for cache hit/miss rates
@Override
public void onEvent(CacheEvent<?, ?> cacheEvent) {
-    log.info("Cache event occurred. Key: {}, Old Value: {}, New Value: {}",
-            cacheEvent.getKey(), cacheEvent.getOldValue(), cacheEvent.getNewValue());
+    log.debug("Cache event: type={}, key={}, oldValue={}, newValue={}",
+            cacheEvent.getType(),
+            cacheEvent.getKey(),
+            cacheEvent.getOldValue(),
+            cacheEvent.getNewValue());
+    // Consider adding metrics here
+    // metricsRegistry.counter("cache.events", "type", cacheEvent.getType()).increment();
}

Committable suggestion skipped: line range outside the PR's diff.

Comment on lines +4 to +21
export const options = {
// Key configurations for avg load test in this section
stages: [{duration: '1m', target: 100}, // traffic ramp-up from 1 to 50 users over 1 minutes.
{duration: '5m', target: 100}, // stay at 100 users for 5 minutes
{duration: '1m', target: 0}, // ramp-down to 0 users
],
};

export default () => {
// k6 run --out influxdb=http://localhost:8086/k6 load-test.js
const urlRes = http.get('http://localhost:8083/api/v1/display');
sleep(1);
// MORE STEPS
// Here you can have more steps or complex script
// Step1
// Step2
// etc.
};
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🛠️ Refactor suggestion

Enhance load test with response validation and metrics

The current load test implementation lacks important features for comprehensive performance testing:

  1. No response validation
  2. Missing performance thresholds
  3. Fixed sleep time might not represent real-world scenarios

Apply this diff to improve the load test:

 export const options = {
   stages: [{duration: '1m', target: 100},
     {duration: '5m', target: 100},
     {duration: '1m', target: 0},
   ],
+  thresholds: {
+    http_req_duration: ['p(95)<500'], // 95% of requests should complete within 500ms
+    http_req_failed: ['rate<0.01'],   // Less than 1% of requests should fail
+  },
 };

 export default () => {
   const urlRes = http.get('http://localhost:8083/api/v1/display');
-  sleep(1);
+  check(urlRes, {
+    'status is 200': (r) => r.status === 200,
+    'response time OK': (r) => r.timings.duration < 500,
+  });
+  sleep(Math.random() * 3 + 1); // Random sleep between 1-4 seconds
   // MORE STEPS
   // Here you can have more steps or complex script
   // Step1
   // Step2
   // etc.
 };
📝 Committable suggestion

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Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
export const options = {
// Key configurations for avg load test in this section
stages: [{duration: '1m', target: 100}, // traffic ramp-up from 1 to 50 users over 1 minutes.
{duration: '5m', target: 100}, // stay at 100 users for 5 minutes
{duration: '1m', target: 0}, // ramp-down to 0 users
],
};
export default () => {
// k6 run --out influxdb=http://localhost:8086/k6 load-test.js
const urlRes = http.get('http://localhost:8083/api/v1/display');
sleep(1);
// MORE STEPS
// Here you can have more steps or complex script
// Step1
// Step2
// etc.
};
export const options = {
// Key configurations for avg load test in this section
stages: [{duration: '1m', target: 100}, // traffic ramp-up from 1 to 50 users over 1 minutes.
{duration: '5m', target: 100}, // stay at 100 users for 5 minutes
{duration: '1m', target: 0}, // ramp-down to 0 users
],
thresholds: {
http_req_duration: ['p(95)<500'], // 95% of requests should complete within 500ms
http_req_failed: ['rate<0.01'], // Less than 1% of requests should fail
},
};
export default () => {
// k6 run --out influxdb=http://localhost:8086/k6 load-test.js
const urlRes = http.get('http://localhost:8083/api/v1/display');
check(urlRes, {
'status is 200': (r) => r.status === 200,
'response time OK': (r) => r.timings.duration < 500,
});
sleep(Math.random() * 3 + 1); // Random sleep between 1-4 seconds
// MORE STEPS
// Here you can have more steps or complex script
// Step1
// Step2
// etc.
};

Comment on lines +4 to +18
export const options = {
vus: 50, // Key for Smoke test. Keep it at 2, 3, max 5 VUs
duration: '1m', // This can be shorter or just a few iterations
};

export default () => {
// k6 run --out influxdb=http://localhost:8086/k6 smoke-test.js
const urlRes = http.get('http://localhost:8080/api/v1/order/1');
sleep(1);
// MORE STEPS
// Here you can have more steps or complex script
// Step1
// Step2
// etc.
};
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🛠️ Refactor suggestion

Align smoke test with load test implementation

The smoke test should follow similar patterns as the load test for consistency and proper validation:

  1. Missing response validation
  2. No performance thresholds
  3. Fixed sleep time

Apply this diff to improve the smoke test:

 export const options = {
   vus: 50,
   duration: '1m',
+  thresholds: {
+    http_req_duration: ['p(95)<200'], // Stricter threshold for smoke test
+    http_req_failed: ['rate<0.001'],  // Stricter failure rate for smoke test
+  },
 };

 export default () => {
   const urlRes = http.get('http://localhost:8080/api/v1/order/1');
-  sleep(1);
+  check(urlRes, {
+    'status is 200': (r) => r.status === 200,
+    'response time OK': (r) => r.timings.duration < 200,
+    'valid response body': (r) => r.body.length > 0,
+  });
+  sleep(Math.random() * 2 + 1); // Random sleep between 1-3 seconds
   // MORE STEPS
   // Here you can have more steps or complex script
   // Step1
   // Step2
   // etc.
 };

Additionally, consider adding more test scenarios to verify different order IDs and edge cases.

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
export const options = {
vus: 50, // Key for Smoke test. Keep it at 2, 3, max 5 VUs
duration: '1m', // This can be shorter or just a few iterations
};
export default () => {
// k6 run --out influxdb=http://localhost:8086/k6 smoke-test.js
const urlRes = http.get('http://localhost:8080/api/v1/order/1');
sleep(1);
// MORE STEPS
// Here you can have more steps or complex script
// Step1
// Step2
// etc.
};
export const options = {
vus: 50,
duration: '1m',
thresholds: {
http_req_duration: ['p(95)<200'], // Stricter threshold for smoke test
http_req_failed: ['rate<0.001'], // Stricter failure rate for smoke test
},
};
export default () => {
// k6 run --out influxdb=http://localhost:8086/k6 smoke-test.js
const urlRes = http.get('http://localhost:8080/api/v1/order/1');
check(urlRes, {
'status is 200': (r) => r.status === 200,
'response time OK': (r) => r.timings.duration < 200,
'valid response body': (r) => r.body.length > 0,
});
sleep(Math.random() * 2 + 1); // Random sleep between 1-3 seconds
// MORE STEPS
// Here you can have more steps or complex script
// Step1
// Step2
// etc.
};

@hoa0217 hoa0217 changed the title week5(정화): 모듈러 모놀리스로 아키텍처 개선 및 캐싱 활용 week5(정화): 멀티모듈 아키텍처 변경 및 캐싱(로컬, Remote, 하이브리드) 활용 Dec 22, 2024
@hoa0217 hoa0217 added 코드 참고할 예제 또는 코드 스니펫이 포함되어 있어요. 활동 주차 별 학습 내용을 공유해요. labels Dec 22, 2024
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