feat: 예외 처리 로직 구현

Author: jay-so

slidingwindowlog.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="AdditionalModuleElements">
+    <content url="file://$MODULE_DIR$" dumb="true">
+      <excludeFolder url="file://$MODULE_DIR$/.idea/copilot/chatSessions" />
+    </content>
+  </component>
+  <component name="SonarLintModuleSettings">
+    <option name="uniqueId" value="5f9c5e5f-cc45-4d93-afba-2fbb968908fa" />
+  </component>
+</module>

src/main/java/com/systemdesign/slidingwindowlog/common/dto/ExceptionResponse.java

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+package com.systemdesign.slidingwindowlog.common.dto;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor(staticName = "from")
+public class ExceptionResponse {
+
+    private final String code;
+}
+

src/main/java/com/systemdesign/slidingwindowlog/common/exception/BusinessException.java

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+package com.systemdesign.slidingwindowlog.common.exception;
+
+import lombok.Getter;
+
+@Getter
+public abstract class BusinessException extends RuntimeException{
+
+    private final ExceptionCode exceptionCode;
+    private final Object[] rejectedValues;
+
+    protected BusinessException(ExceptionCode exceptionCode, Object... rejectedValues) {
+        super(exceptionCode.getMessage());
+        this.exceptionCode = exceptionCode;
+        this.rejectedValues = rejectedValues;
+    }
+}

src/main/java/com/systemdesign/slidingwindowlog/common/exception/CommonException.java

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+package com.systemdesign.slidingwindowlog.common.exception;
+
+public class CommonException extends BusinessException {
+
+    public CommonException(ExceptionCode exceptionCode, Object... rejectedValues) {
+        super(exceptionCode, rejectedValues);
+    }
+}

src/main/java/com/systemdesign/slidingwindowlog/common/exception/CommonExceptionCode.java

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+package com.systemdesign.slidingwindowlog.common.exception;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+
+import static org.springframework.http.HttpStatus.*;
+
+@Getter
+@RequiredArgsConstructor
+public enum CommonExceptionCode implements ExceptionCode {
+
+    COMMON_NOT_FOUND(NOT_FOUND, "COM-001", "요청한 URL에 해당하는 리소스를 찾을 수 없음"),
+    COMMON_BAD_REQUEST(BAD_REQUEST, "COM-002", "잘못된 요청"),
+    COMMON_METHOD_NOT_ALLOWED(METHOD_NOT_ALLOWED, "COM-003", "허용되지 않은 HTTP Method 요청 발생"),
+    COMMON_INTERNAL_SERVER_ERROR(INTERNAL_SERVER_ERROR, "COM-004", "기타 서버 내부 에러 발생"),
+    ;
+
+    private final HttpStatus status;
+    private final String code;
+    private final String message;
+}

src/main/java/com/systemdesign/slidingwindowlog/common/exception/ExceptionCode.java

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+package com.systemdesign.slidingwindowlog.common.exception;
+
+import org.springframework.http.HttpStatus;
+
+public interface ExceptionCode {
+
+    HttpStatus getStatus();
+
+    String getCode();
+
+    String getMessage();
+}

src/main/java/com/systemdesign/slidingwindowlog/common/exception/GlobalExceptionHandler.java

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+package com.systemdesign.slidingwindowlog.common.exception;
+
+import com.systemdesign.slidingwindowlog.common.dto.ExceptionResponse;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.HttpRequestMethodNotSupportedException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.servlet.NoHandlerFoundException;
+
+import static com.systemdesign.slidingwindowlog.common.exception.CommonExceptionCode.*;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(NoHandlerFoundException.class)
+    public ResponseEntity<ExceptionResponse> handleNoHandlerFoundException(NoHandlerFoundException e) {
+        return ResponseEntity.status(COMMON_NOT_FOUND.getStatus())
+                .body(ExceptionResponse.from(COMMON_NOT_FOUND.getCode()));
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<ExceptionResponse> handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
+        return ResponseEntity.status(COMMON_BAD_REQUEST.getStatus())
+                .body(ExceptionResponse.from(COMMON_BAD_REQUEST.getCode()));
+    }
+
+    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
+    public ResponseEntity<ExceptionResponse> handleHttpRequestMethodNotSupportedException(HttpRequestMethodNotSupportedException e) {
+        return ResponseEntity.status(COMMON_METHOD_NOT_ALLOWED.getStatus())
+                .body(ExceptionResponse.from(COMMON_METHOD_NOT_ALLOWED.getCode()));
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<ExceptionResponse> handleException(Exception e) {
+        return ResponseEntity.status(COMMON_INTERNAL_SERVER_ERROR.getStatus())
+                .body(ExceptionResponse.from(COMMON_INTERNAL_SERVER_ERROR.getCode()));
+    }
+
+    @ExceptionHandler(BusinessException.class)
+    public ResponseEntity<ExceptionResponse> handleBusinessException(BusinessException e) {
+        ExceptionCode exceptionCode = e.getExceptionCode();
+        return ResponseEntity.status(exceptionCode.getStatus())
+                .body(ExceptionResponse.from(exceptionCode.getCode()));
+    }
+}