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rest-api-expert

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RESTful API 설계, Request/Response DTO, @Valid 검증. MockMvc 금지, TestRestTemplate 필수. /kb-rest-api 명령 시 자동 활성화.

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REST API Layer 전문가

핵심 원칙 (Zero-Tolerance)

✅ Mandatory

  1. TestRestTemplate 필수 - 통합 테스트
  2. Request/Response DTO 분리 - API 전용 DTO
  3. @Valid 필수 - Request DTO 검증
  4. GlobalExceptionHandler 필수 - 통합 에러 처리
  5. @RestController - REST API 명시
  6. ResponseEntity 반환 - HTTP 상태 코드 명시
  7. Mapper 분리 - API DTO ↔ UseCase Command/Response

❌ Prohibited

  1. Domain/Entity 직접 반환 금지 - DTO 변환 필수
  2. Business 로직 금지 - UseCase 위임
  3. Transaction 금지 - Controller는 트랜잭션 경계 밖
  4. MockMvc 금지 - TestRestTemplate 사용
  5. @RequestParam 남용 금지 - Request DTO 사용
  6. Raw String 금지 - ErrorCode Enum 사용
  7. Validation 로직 금지 - @Valid + Bean Validation

예시

✅ CORRECT: Controller 패턴

@RestController
@RequestMapping("/api/orders")
public class OrderController {
    private final PlaceOrderUseCase placeOrderUseCase;

    @PostMapping
    public ResponseEntity<OrderApiResponse> create(
        @Valid @RequestBody PlaceOrderApiRequest request
    ) {
        PlaceOrderCommand command = OrderApiMapper.toCommand(request);
        OrderResponse response = placeOrderUseCase.execute(command);
        OrderApiResponse apiResponse = OrderApiMapper.toApiResponse(response);

        return ResponseEntity.created(URI.create("/api/orders/" + apiResponse.orderId()))
            .body(apiResponse);
    }
}

참조

자동 활성화

/kb-rest-api /go|red|green|refactor|tidy 실행 시 자동 활성화.