feat: 도메인 예외 사용 예시로 Comment 도메인 Exception 구조 예시 추가

Author: dnzp75

src/main/java/com/example/log4u/domain/comment/exception/CommentErrorCode.java

@@ -0,0 +1,28 @@
+package com.example.log4u.domain.comment.exception;
+
+import org.springframework.http.HttpStatus;
+
+import com.example.log4u.common.exception.base.ErrorCode;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor
+public enum CommentErrorCode implements ErrorCode {
+
+	NOT_FOUND_COMMENT(HttpStatus.NOT_FOUND, "댓글을 찾을 수 없습니다.");
+
+	private final HttpStatus httpStatus;
+	private final String message;
+
+	@Override
+	public HttpStatus getHttpStatus() {
+		return httpStatus;
+	}
+
+	@Override
+	public String getErrorMessage() {
+		return message;
+	}
+}

src/main/java/com/example/log4u/domain/comment/exception/CommentException.java

@@ -0,0 +1,10 @@
+package com.example.log4u.domain.comment.exception;
+
+import com.example.log4u.common.exception.base.ErrorCode;
+import com.example.log4u.common.exception.base.ServiceException;
+
+public class CommentException extends ServiceException {
+	public CommentException(ErrorCode errorCode) {
+		super(errorCode);
+	}
+}

src/main/java/com/example/log4u/domain/comment/exception/NotFoundCommentException.java

@@ -0,0 +1,7 @@
+package com.example.log4u.domain.comment.exception;
+
+public class NotFoundCommentException extends CommentException {
+	public NotFoundCommentException() {
+		super(CommentErrorCode.NOT_FOUND_COMMENT);
+	}
+}

src/main/java/com/example/log4u/domain/comment/testController/TestController.java

@@ -0,0 +1,40 @@
+package com.example.log4u.domain.comment.testController;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.example.log4u.domain.comment.testDto.TestRequest;
+import com.example.log4u.domain.comment.exception.NotFoundCommentException;
+
+import jakarta.validation.Valid;
+
+@RestController
+@RequestMapping("/test")
+public class TestController {
+
+	@PostMapping("/valid")
+	public ResponseEntity<Void> testValidation(@RequestBody @Valid TestRequest request) {
+		return ResponseEntity.ok().build();
+	}
+
+	@GetMapping("/illegal")
+	public String testIllegalArgument() {
+		throw new IllegalArgumentException("잘못된 인자입니다!");
+	}
+
+	@GetMapping("/log4u")
+	public String testLog4uException() {
+		throw new NotFoundCommentException(); // 또는 임의의 ServiceException
+	}
+
+	@GetMapping("/unknown")
+	public String testUnexpectedException() {
+		String str = null;
+		str.length(); // NPE
+		return "절대 도달하지 않음";
+	}
+}

src/main/java/com/example/log4u/domain/comment/testDto/TestRequest.java

@@ -0,0 +1,19 @@
+package com.example.log4u.domain.comment.testDto;
+
+// dto/TestRequest.java
+import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.NotBlank;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class TestRequest {
+
+	@NotBlank
+	private String name;
+
+	@Min(value = 18, message = "나이는 18세 이상이어야 합니다.")
+	private int age;
+
+}