✨ feat: add exception handling to notification server

backend/streetdrop-notification/src/main/java/com/depromeet/error/ErrorCode.java

@@ -0,0 +1,22 @@
+package com.depromeet.error;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+@AllArgsConstructor
+@Builder
+public class ErrorCode implements ErrorCodeInterface {
+    private HttpStatus status;
+    private ErrorDomain domainCode;
+    private String code;
+    private String title;
+    private String message;
+
+    @Override
+    public ErrorCode toErrorCode() {
+        return this;
+    }
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/ErrorCodeInterface.java

@@ -0,0 +1,56 @@
+package com.depromeet.error;
+
+import org.springframework.http.HttpStatus;
+
+/**
+ * This interface provides a basic specification for defining domain error codes.
+ *
+ *
+ * This interface used to extend errorCodeEnum.
+ */
+public interface ErrorCodeInterface {
+
+    /**
+     * Returns the HTTP status code.
+     *
+     * @return The HTTP status code.
+     */
+    HttpStatus getStatus();
+
+
+    /**
+     * Returns the error code. It is not duplicated by domain at all.
+     *
+     * @return The error code.
+     */
+    String getCode();
+
+    /**
+     * Returns the error domain code. All errors are categorized by domain, so check the ErrorDomain code to see them.
+     *
+     * @return The domain code.
+     */
+    ErrorDomain getDomainCode();
+
+    /**
+     * Returns the error title - Short Human Readable Error Title.
+     *
+     * @return The error title.
+     */
+    String getTitle();
+
+    /**
+     * Returns the error message - Human Readable Error Message, It is also recommended that you write solutions together.
+     *
+     * @return The error message.
+     */
+    String getMessage();
+
+    /**
+     * Converts this to an ErrorCode object.
+     *
+     * @return An ErrorCode object.
+     */
+    ErrorCode toErrorCode();
+
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/ErrorDomain.java

@@ -0,0 +1,5 @@
+package com.depromeet.error;
+
+public enum ErrorDomain {
+    COMMON, AUTH, FIREBASE
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/ErrorResponse.java

@@ -0,0 +1,30 @@
+package com.depromeet.error;
+
+import lombok.Builder;
+import lombok.Getter;
+import org.springframework.http.ResponseEntity;
+
+import java.time.LocalDateTime;
+
+@Getter
+@Builder
+public class ErrorResponse {
+    private final LocalDateTime timestamp = LocalDateTime.now();
+    private final int status;
+    private final ErrorDomain errorDomain;
+    private final String code;
+    private final String title;
+    private final String message;
+
+    public static <T extends ErrorCodeInterface> ResponseEntity<ErrorResponse> toResponseEntity(T errorCode) {
+        return ResponseEntity
+                .status(errorCode.getStatus())
+                .body(ErrorResponse.builder()
+                        .status(errorCode.getStatus().value())
+                        .errorDomain(errorCode.getDomainCode())
+                        .code(errorCode.getCode())
+                        .title(errorCode.getTitle())
+                        .message(errorCode.getMessage())
+                        .build());
+    }
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/GlobalExceptionHandler.java

@@ -0,0 +1,39 @@
+package com.depromeet.error;
+
+
+import com.depromeet.error.exceptions.BusinessException;
+import com.depromeet.error.code.GlobalErrorCode;
+import com.depromeet.error.exceptions.NotFoundException;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.client.HttpClientErrorException;
+
+@Slf4j
+@RestControllerAdvice
+@RequiredArgsConstructor
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(BusinessException.class)
+    protected ResponseEntity<ErrorResponse> handleBusinessException(BusinessException e) {
+        return ErrorResponse.toResponseEntity(e.getErrorCode());
+    }
+
+    @ExceptionHandler(NotFoundException.class)
+    protected ResponseEntity<ErrorResponse> handleNotFoundException(NotFoundException e) {
+        return ErrorResponse.toResponseEntity(e.getErrorCode());
+    }
+
+
+    @ExceptionHandler(HttpClientErrorException.BadRequest.class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    protected ResponseEntity<ErrorResponse> handleBadRequestException(HttpClientErrorException.BadRequest e) {
+        return ErrorResponse.toResponseEntity(GlobalErrorCode.BAD_REQUEST);
+    }
+
+
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/code/FireBaseErrorCode.java

@@ -0,0 +1,33 @@
+package com.depromeet.error.code;
+
+import com.depromeet.error.ErrorCode;
+import com.depromeet.error.ErrorCodeInterface;
+import com.depromeet.error.ErrorDomain;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+@AllArgsConstructor
+public enum FireBaseErrorCode implements ErrorCodeInterface {
+
+    FIRE_BASE_INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "FireBase Internal Server Error", "FireBase Internal Server Error"),
+    TOO_MUCH_REQUEST(HttpStatus.TOO_MANY_REQUESTS, "Too Much Request to FireBase Server", "Too Much Request to FireBase Server, Request After 3 Minutes")
+    ;
+
+    private final HttpStatus status;
+    private final ErrorDomain domainCode = ErrorDomain.FIREBASE;
+    private final String code = name().toUpperCase();
+    private final String title;
+    private final String message;
+
+    public ErrorCode toErrorCode() {
+        return ErrorCode
+                .builder()
+                .status(status)
+                .domainCode(domainCode)
+                .code(code)
+                .message(message)
+                .build();
+    }
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/code/GlobalErrorCode.java

@@ -0,0 +1,33 @@
+package com.depromeet.error.code;
+
+import com.depromeet.error.ErrorCode;
+import com.depromeet.error.ErrorCodeInterface;
+import com.depromeet.error.ErrorDomain;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+@AllArgsConstructor
+public enum GlobalErrorCode implements ErrorCodeInterface {
+
+    BAD_REQUEST(HttpStatus.BAD_REQUEST, "Bad Request", "This Request BadRequest"),
+    INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "Internal Server Error", "Internal Server Error"),
+    INVALID_INPUT_VALUE(HttpStatus.BAD_REQUEST, "Invalid Input Value", "Invalid Input Value"),
+    EXTERNAL_SERVER_EXCEPTION(HttpStatus.INTERNAL_SERVER_ERROR, "External Sever Error","Invalid Input Value");
+
+    private final HttpStatus status;
+    private final String code = name().toUpperCase();
+    private final ErrorDomain domainCode = ErrorDomain.COMMON;
+    private final String title;
+    private final String message;
+
+    public ErrorCode toErrorCode() {
+        return ErrorCode.builder()
+                .status(status)
+                .domainCode(domainCode)
+                .code(code)
+                .message(message)
+                .build();
+    }
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/code/TokenErrorCode.java

@@ -0,0 +1,32 @@
+package com.depromeet.error.code;
+
+import com.depromeet.error.ErrorCode;
+import com.depromeet.error.ErrorCodeInterface;
+import com.depromeet.error.ErrorDomain;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+@AllArgsConstructor
+public enum TokenErrorCode implements ErrorCodeInterface {
+
+    TOKEN_NOT_FOUND(HttpStatus.NOT_FOUND, "Token is not found", "Token is not found"),
+    ;
+
+    private final HttpStatus status;
+    private final ErrorDomain domainCode = ErrorDomain.FIREBASE;
+    private final String code = name().toUpperCase();
+    private final String title;
+    private final String message;
+
+    public ErrorCode toErrorCode() {
+        return ErrorCode
+                .builder()
+                .status(status)
+                .domainCode(domainCode)
+                .code(code)
+                .message(message)
+                .build();
+    }
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/exceptions/BusinessException.java

@@ -0,0 +1,19 @@
+package com.depromeet.error.exceptions;
+
+
+import com.depromeet.error.ErrorCode;
+import com.depromeet.error.ErrorCodeInterface;
+import lombok.Getter;
+
+@Getter
+public class BusinessException extends RuntimeException {
+    private final ErrorCode errorCode;
+    private final Exception exception;
+
+    public <T extends ErrorCodeInterface> BusinessException(T errorCode) {
+        super(errorCode.getMessage());
+        this.errorCode = errorCode.toErrorCode();
+        this.exception = getException();
+    }
+
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/exceptions/ExternalServerException.java

@@ -0,0 +1,17 @@
+package com.depromeet.error.exceptions;
+
+import com.depromeet.error.ErrorCode;
+import com.depromeet.error.ErrorCodeInterface;
+import lombok.Getter;
+
+@Getter
+public class ExternalServerException extends RuntimeException {
+    private final ErrorCode errorCode;
+    private final Exception exception;
+
+    public <T extends ErrorCodeInterface> ExternalServerException(T errorCode) {
+        super(errorCode.getMessage());
+        this.errorCode = errorCode.toErrorCode();
+        this.exception = getException();
+    }
+}

backend/streetdrop-notification/src/main/java/com/depromeet/error/exceptions/NotFoundException.java

@@ -0,0 +1,17 @@
+package com.depromeet.error.exceptions;
+
+import com.depromeet.error.ErrorCode;
+import com.depromeet.error.ErrorCodeInterface;
+import lombok.Getter;
+
+@Getter
+public class NotFoundException extends RuntimeException {
+    private final ErrorCode errorCode;
+    private final Exception exception;
+
+    public <T extends ErrorCodeInterface> NotFoundException(T errorCode) {
+        super(errorCode.getMessage());
+        this.errorCode = errorCode.toErrorCode();
+        this.exception = getException();
+    }
+}

backend/streetdrop-notification/src/main/java/com/depromeet/external/fcm/FcmConfig.java

@@ -1,5 +1,7 @@
 package com.depromeet.external.fcm;
 
+import com.depromeet.error.exceptions.BusinessException;
+import com.depromeet.error.code.GlobalErrorCode;
 import com.google.auth.oauth2.GoogleCredentials;
 import com.google.firebase.FirebaseApp;
 import com.google.firebase.FirebaseOptions;
@@ -29,8 +31,7 @@ private void initialize() {
                 FirebaseApp.initializeApp(options);
             }
         } catch (IOException e) {
-            e.printStackTrace();
-            throw new RuntimeException("Firebase initialization failed");
+            throw new BusinessException(GlobalErrorCode.BAD_REQUEST);
         }
     }
 }

backend/streetdrop-notification/src/main/java/com/depromeet/service/PushService.java

@@ -4,8 +4,12 @@
 import com.depromeet.dto.request.AllPushRequestDto;
 import com.depromeet.dto.request.PushRequestDto;
 import com.depromeet.dto.request.TopicPushRequestDto;
+import com.depromeet.error.ErrorCode;
+import com.depromeet.error.code.FireBaseErrorCode;
+import com.depromeet.error.exceptions.ExternalServerException;
 import com.depromeet.external.fcm.FcmService;
 import com.depromeet.repository.UserDeviceRepository;
+import com.google.firebase.FirebaseException;
 import com.google.firebase.messaging.FirebaseMessagingException;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -40,6 +44,7 @@ public void sendPush(PushRequestDto pushRequestDto) {
                 }
             }
         } catch (FirebaseMessagingException e) {
+            throw new ExternalServerException(FireBaseErrorCode.FIRE_BASE_INTERNAL_SERVER_ERROR);
         }
 
         notificationService.save(pushRequestDto);
@@ -58,6 +63,7 @@ public void sendAllPush(AllPushRequestDto pushRequestDto) {
                 fcmService.sendMulticastMessageSync(tokens, pushRequestDto.getContent());
             }
         } catch (FirebaseMessagingException e) {
+            throw new ExternalServerException(FireBaseErrorCode.FIRE_BASE_INTERNAL_SERVER_ERROR);
         }
 
         notificationService.save(pushRequestDto);
@@ -72,6 +78,7 @@ public void sendTopicPush(TopicPushRequestDto tokenPushRequestDto) {
                 fcmService.sendTopicMessageSync(tokenPushRequestDto.getTopic(), tokenPushRequestDto.getContent());
             }
         } catch (FirebaseMessagingException e) {
+            throw new ExternalServerException(FireBaseErrorCode.FIRE_BASE_INTERNAL_SERVER_ERROR);
         }
 
         notificationService.save(tokenPushRequestDto);

backend/streetdrop-notification/src/main/java/com/depromeet/service/TokenService.java

@@ -2,6 +2,9 @@
 
 import com.depromeet.domain.UserDevice;
 import com.depromeet.dto.request.TokenRequestDto;
+import com.depromeet.error.code.TokenErrorCode;
+import com.depromeet.error.exceptions.BusinessException;
+import com.depromeet.error.exceptions.NotFoundException;
 import com.depromeet.repository.UserDeviceRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -33,7 +36,7 @@ public void saveToken(TokenRequestDto tokenRequestDto) {
     @Transactional
     public void deleteToken(Long userId) {
         var userDevice = userDeviceRepository.findByUserId(userId)
-                .orElseThrow(() -> new RuntimeException("Token not found for userId: " + userId));
+                .orElseThrow(() -> new NotFoundException(TokenErrorCode.TOKEN_NOT_FOUND));
         userDeviceRepository.delete(userDevice);
     }
 }