ErrorResponseResolver.java

public class ErrorResponseResolver {

  public <T extends Throwable> void test(T t)
      throws InvocationTargetException, IllegalAccessException {
    Method[] methods = getClass().getDeclaredMethods();
    for (Method method : methods) {
      String clazzName = t.getClass().getName();
      if (clazzName.equals(method.getParameterTypes()[0].getName())) {
        method.invoke(t, t); // 실행한다!
      }
    }

  }

  public static ErrorAttribute resolveToResponse(FeignException exception) {
    final ErrorCode errorCode = ErrorCode.BAD_REQUEST;
    return new ErrorAttribute(errorCode.getHttpStatus(), JsonUtils
        .convertBytes(new Errors<>(errorCode.getCode(), exception.getMessage())));
  }

  public static ErrorAttribute resolveToResponse(ResponseStatusException exception) {
    final ErrorCode errorCode = ErrorCode.BAD_REQUEST;
    return new ErrorAttribute(errorCode.getHttpStatus(), JsonUtils
        .convertBytes(new Errors<>(errorCode.getCode(), exception.getReason())));
  }

  public static ErrorAttribute resolveToResponse(GatewayException exception) {
    final ErrorCode errorCode = ErrorCode.BAD_REQUEST;
    return new ErrorAttribute(errorCode.getHttpStatus(), JsonUtils
        .convertBytes(new Errors<>(errorCode.getCode(), exception.getMessage())));
  }

  // TODO : CustomRunTimeException Define (Include ErrorCode)

  @AllArgsConstructor
  @Getter
  public static class ErrorAttribute {

    private final HttpStatus status;
    private final byte[] errorMessageBytes;

  }

}