src/main/java/com/runtimematrix/exception/GlobalExceptionHandler.java

@@ -0,0 +1,75 @@
+package com.runtimematrix.exception;
+
+import com.runtimematrix.dto.ErrorResponse;
+import jakarta.servlet.http.HttpServletRequest;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
+
+    @ExceptionHandler(BusinessException.class)
+    public ResponseEntity<ErrorResponse> handleBusinessException(
+            BusinessException ex, HttpServletRequest request) {
+        log.error("Business exception: code={}, message={}", ex.getCode(), ex.getMessage());
+
+        ErrorResponse response = new ErrorResponse(
+                ex.getCode(),
+                ex.getMessage(),
+                ex.getTimestamp().toString(),
+                request.getRequestURI()
+        );
+
+        HttpStatus status = determineHttpStatus(ex);
+        return ResponseEntity.status(status).body(response);
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<ErrorResponse> handleValidationException(
+            MethodArgumentNotValidException ex, HttpServletRequest request) {
+        String message = ex.getBindingResult().getFieldErrors().stream()
+                .map(error -> error.getField() + ": " + error.getDefaultMessage())
+                .reduce((a, b) -> a + "; " + b)
+                .orElse("Validation failed");
+
+        ErrorResponse response = new ErrorResponse(
+                "VALIDATION_ERROR",
+                message,
+                Instant.now().toString(),
+                request.getRequestURI()
+        );
+
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(response);
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<ErrorResponse> handleGenericException(
+            Exception ex, HttpServletRequest request) {
+        log.error("Unexpected exception", ex);
+
+        ErrorResponse response = new ErrorResponse(
+                "ERR_INTERNAL",
+                "내부 서버 오류가 발생했습니다",
+                Instant.now().toString(),
+                request.getRequestURI()
+        );
+
+        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(response);
+    }
+
+    private HttpStatus determineHttpStatus(BusinessException ex) {
+        String code = ex.getCode();
+        if (code.startsWith("VALIDATION_")) return HttpStatus.BAD_REQUEST;
+        if (code.startsWith("AUTH_")) return HttpStatus.UNAUTHORIZED;
+        if (code.startsWith("CONFLICT_")) return HttpStatus.CONFLICT;
+        if (code.startsWith("ERR_NOT_FOUND")) return HttpStatus.NOT_FOUND;
+        return HttpStatus.INTERNAL_SERVER_ERROR;
+    }
+}