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</aside>

1. Controller 예외처리

DMakerController 에 handleException 구현

// DmakerController 전용 Exception 
@ResponseStatus(value = HttpStatus.CONFLICT)
@ExceptionHandler(DMakerException.class)
public DmakerErrorResponse handleException(DMakerException e, HttpServletRequest request) {
    log.error("errorCode : {}, url : {}, message : {}", 
            e.getDMakerErrorCode(), request.getRequestURI(), e.getDetailMessage());
    
    return DmakerErrorResponse.builder()
            .errorCode(e.getDMakerErrorCode())
            .errorMessage(e.getDetailMessage())
            .build();
}

• DmakerController에서 에러 발생시 해당 메서드 호출

DmakerErrorResponse DTO 구현

@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class DmakerErrorResponse {
    private DMakerErrorCode errorCode;
    private String errorMessage;
}

• handleException return 타입

[nio-8080-exec-3] c.d.dMaker.controller.DMakerController   : errorCode : DUPLICATED_MEMBER_ID, url : /create-developers, message : MemberId가 중복되는 개발자가 없습니다.

• 에러 발생시 로그 확인 가능

• 중복된 멤버 가입 하려고 하면 아래와 같은 결과 확인 가능

HTTP/1.1 500 
Content-Type: application/json
Transfer-Encoding: chunked
Date: Sun, 20 Mar 2022 09:40:27 GMT
Connection: close

{
  "errorCode": "DUPLICATED_MEMBER_ID",
  "errorMessage": "MemberId가 중복되는 개발자가 없습니다."
}
Response file saved.

2. Global 예외처리

import javax.servlet.http.HttpServletRequest;

@Slf4j
@RestControllerAdvice
public class DMakerExceptionHandler {

    @ResponseStatus(value = HttpStatus.CONFLICT)
    @ExceptionHandler(DMakerException.class)
    public DmakerErrorResponse handleException(DMakerException e, HttpServletRequest request) {
        log.error("errorCode : {}, url : {}, message : {}",
                e.getDMakerErrorCode(), request.getRequestURI(), e.getDetailMessage());

        return DmakerErrorResponse.builder()
                .errorCode(e.getDMakerErrorCode())
                .errorMessage(e.getDetailMessage())
                .build();
    }

    @ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
    @ExceptionHandler(value = {
            HttpRequestMethodNotSupportedException.class,   // POST, GET 매핑 오류
            MethodArgumentNotValidException.class           // @Min(0) -- 조건이 맞이 않을 경우
    })
    public DmakerErrorResponse handleBadRequest(Exception e, HttpServletRequest request) {
        log.error("url : {}, message : {}",
                request.getRequestURI(), e.getMessage());

        return DmakerErrorResponse.builder()
                .errorCode(DMakerErrorCode.INTERNAL_SERVER_ERROR)
                .errorMessage(DMakerErrorCode.INTERNAL_SERVER_ERROR.getMessage())
                .build();
    }

    @ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
    @ExceptionHandler(Exception.class)
    public DmakerErrorResponse handleException(Exception e, HttpServletRequest request) {
        log.error("url : {}, message : {}",
                request.getRequestURI(), e.getMessage());

        return DmakerErrorResponse.builder()
                .errorCode(DMakerErrorCode.INTERNAL_SERVER_ERROR)
                .errorMessage(DMakerErrorCode.INTERNAL_SERVER_ERROR.getMessage())
                .build();
    }
}

• 포스트 호출 부분에서 GET으로 호출 시

2022-03-20 22:48:43.014 ERROR 19559 --- [nio-8080-exec-4] c.d.d.Exception.DMakerExceptionHandler   : url : /create-developers, message : Request method 'PUT' not supported
Disconnected from the target VM, address: '127.0.0.1:51127', transport: 'socket'

HTTP/1.1 500 
Content-Type: application/json
Transfer-Encoding: chunked
Date: Sun, 20 Mar 2022 13:48:43 GMT
Connection: close

{
  "errorCode": "INTERNAL_SERVER_ERROR",
  "errorMessage": "서버에 오류가 발생했습니다."
}
Response file saved.