Feature | #4 | @lcomment | 에러 핸들러 구현

cakk-api/src/main/java/com/cakk/api/controller/advice/GlobalControllerAdvice.java

@@ -0,0 +1,76 @@
+package com.cakk.api.controller.advice;
+
+import static org.springframework.http.HttpStatus.*;
+import static org.springframework.http.HttpStatus.INTERNAL_SERVER_ERROR;
+
+import java.sql.SQLException;
+import java.util.List;
+
+import jakarta.servlet.http.HttpServletRequest;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.FieldError;
+import org.springframework.web.HttpRequestMethodNotSupportedException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.MissingServletRequestParameterException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;
+
+import lombok.RequiredArgsConstructor;
+
+import com.cakk.api.service.slack.SlackService;
+import com.cakk.common.enums.ReturnCode;
+import com.cakk.common.exception.CakkException;
+import com.cakk.common.response.ApiResponse;
+
+@RestControllerAdvice
+@RequiredArgsConstructor
+public class GlobalControllerAdvice {
+
+	private final SlackService slackService;
+
+	@ExceptionHandler(CakkException.class)
+	public ResponseEntity<ApiResponse<Void>> handleCakkException(CakkException exception, HttpServletRequest request) {
+		if (exception.getReturnCode().equals(ReturnCode.EXTERNAL_SERVER_ERROR)) {
+			slackService.sendSlackForError(exception, request);
+		}
+
+		return getResponseEntity(BAD_REQUEST, ApiResponse.fail(exception.getReturnCode()));
+	}
+
+	@ExceptionHandler(value = {
+		HttpMessageNotReadableException.class,
+		MissingServletRequestParameterException.class,
+		MethodArgumentTypeMismatchException.class
+	})
+	public ResponseEntity<ApiResponse<Void>> handleRequestException(Exception exception) {
+		return getResponseEntity(BAD_REQUEST, ApiResponse.fail(ReturnCode.WRONG_PARAMETER));
+	}
+
+	@ExceptionHandler(HttpRequestMethodNotSupportedException.class)
+	public ResponseEntity<ApiResponse<Void>> handleMethodNotSupportedException(HttpRequestMethodNotSupportedException exception) {
+		return getResponseEntity(BAD_REQUEST, ApiResponse.fail(ReturnCode.METHOD_NOT_ALLOWED));
+	}
+
+	@ExceptionHandler(MethodArgumentNotValidException.class)
+	public ResponseEntity<ApiResponse<List<FieldError>>> badRequestExHandler(BindingResult bindingResult) {
+		return getResponseEntity(BAD_REQUEST, ApiResponse.fail(ReturnCode.WRONG_PARAMETER, bindingResult.getFieldErrors()));
+	}
+
+	@ExceptionHandler(value = {
+		SQLException.class,
+		RuntimeException.class
+	})
+	public ResponseEntity<ApiResponse<String>> handleServerException(SQLException exception, HttpServletRequest request) {
+		slackService.sendSlackForError(exception, request);
+		return getResponseEntity(INTERNAL_SERVER_ERROR, ApiResponse.error(ReturnCode.INTERNAL_SERVER_ERROR, exception.getMessage()));
+	}
+
+	private <T> ResponseEntity<ApiResponse<T>> getResponseEntity(HttpStatus status, ApiResponse<T> response) {
+		return ResponseEntity.status(status).body(response);
+	}
+}

cakk-common/src/main/java/com/cakk/common/enums/ReturnCode.java

@@ -16,6 +16,10 @@ public enum ReturnCode {
 	EMPTY_AUTH_JWT("1103", "인증 정보가 비어있는 jwt 토큰입니다."),
 	EMPTY_USER("1104", "비어있는 유저 정보로 jwt 토큰을 생성할 수 없습니다."),
 
+	// 클라이언트 에러
+	WRONG_PARAMETER("9000", "잘못된 파라미터 입니다."),
+	METHOD_NOT_ALLOWED("9001", "허용되지 않은 메소드 입니다."),
+
 	// 서버 에러 (9998, 9999)
 	INTERNAL_SERVER_ERROR("9998", "내부 서버 에러 입니다."),
 	EXTERNAL_SERVER_ERROR("9999", "외부 서버 에러 입니다.");

cakk-common/src/main/java/com/cakk/common/exception/CakkException.java

@@ -7,10 +7,12 @@
 @Getter
 public class CakkException extends RuntimeException {
 
+	private final ReturnCode returnCode;
 	private final String code;
 	private final String message;
 
 	public CakkException(ReturnCode returnCode) {
+		this.returnCode = returnCode;
 		this.code = returnCode.getCode();
 		this.message = returnCode.getMessage();
 	}

cakk-common/src/main/java/com/cakk/common/response/ApiResponse.java

@@ -21,6 +21,16 @@ public static <T> ApiResponse<T> success(T data) {
 		return response;
 	}
 
+	public static <T> ApiResponse<T> fail(ReturnCode returnCode) {
+		ApiResponse<T> response = new ApiResponse<>();
+
+		response.returnCode = returnCode.getCode();
+		response.returnMessage = returnCode.getMessage();
+		response.data = null;
+
+		return response;
+	}
+
 	public static <T> ApiResponse<T> fail(ReturnCode returnCode, T data) {
 		ApiResponse<T> response = new ApiResponse<>();