TA 역할 Spring 경계 smoke (role-ta-live-1522-001)

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

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+package com.runtimematrix.config;
+
+import com.runtimematrix.controller.dto.ErrorResponse;
+import com.runtimematrix.domain.exception.BusinessException;
+import jakarta.servlet.http.HttpServletRequest;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+import java.time.Instant;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+/** 전역 예외 처리기 - RFC 7807 Problem Details 형식으로 변환 */
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
+
+    @ExceptionHandler(BusinessException.class)
+    public ResponseEntity<ErrorResponse> handleBusinessException(BusinessException ex, HttpServletRequest request) {
+        String traceId = getOrGenerateTraceId();
+        MDC.put("traceId", traceId);
+        log.warn("[{}] {} - {}", traceId, ex.getErrorCode(), ex.getMessage());
+
+        return ResponseEntity.status(ex.getHttpStatus())
+            .body(ErrorResponse.of(ex.getType(), ex.getErrorCode(), ex.getMessage(),
+                ex.getHttpStatus(), request.getRequestURI(), traceId));
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<ErrorResponse> handleValidationException(MethodArgumentNotValidException ex, HttpServletRequest request) {
+        String traceId = getOrGenerateTraceId();
+        String detail = ex.getBindingResult().getFieldErrors().stream()
+            .map(FieldError::getDefaultMessage).collect(Collectors.joining("; "));
+        log.warn("[{}] Validation failed: {}", traceId, detail);
+
+        return ResponseEntity.badRequest()
+            .body(ErrorResponse.of("https://api.runtimematrix.com/errors/validation-failed",
+                "validation-failed", "입력 검증에 실패했습니다: " + detail,
+                HttpStatus.BAD_REQUEST.value(), request.getRequestURI(), traceId));
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<ErrorResponse> handleGenericException(Exception ex, HttpServletRequest request) {
+        String traceId = getOrGenerateTraceId();
+        log.error("[{}] Unexpected error", traceId, ex);
+
+        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+            .body(ErrorResponse.of("https://api.runtimematrix.com/errors/internal-server-error",
+                "internal-server-error", "예상치 못한 오류가 발생했습니다.",
+                HttpStatus.INTERNAL_SERVER_ERROR.value(), request.getRequestURI(), traceId));
+    }
+
+    private String getOrGenerateTraceId() {
+        String existing = MDC.get("traceId");
+        return existing != null ? existing : UUID.randomUUID().toString().substring(0, 12);
+    }
+}