애플리케이션(RP) 관리 기능 구현 및 Ory Keto 권한 연동

backend/internal/service/keto_service.go

@@ -10,6 +10,7 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"time"
 )
 
 type KetoService interface {
@@ -87,22 +88,34 @@ func (s *ketoService) CreateRelation(ctx context.Context, namespace, object, rel
 	}
 	body, _ := json.Marshal(payload)
 
-	req, _ := http.NewRequestWithContext(ctx, "PUT", u, bytes.NewReader(body))
-	req.Header.Set("Content-Type", "application/json")
+	// Exponential Backoff Retry Logic
+	var lastErr error
+	maxRetries := 3
+	backoff := 100 * time.Millisecond
 
-	resp, err := s.client.Do(req)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
+	for i := 0; i < maxRetries; i++ {
+		req, _ := http.NewRequestWithContext(ctx, "PUT", u, bytes.NewReader(body))
+		req.Header.Set("Content-Type", "application/json")
 
-	if resp.StatusCode != http.StatusCreated && resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusOK {
-		resBody, _ := io.ReadAll(resp.Body)
-		return fmt.Errorf("keto returned status %d: %s", resp.StatusCode, string(resBody))
+		resp, err := s.client.Do(req)
+		if err == nil {
+			defer resp.Body.Close()
+			if resp.StatusCode == http.StatusCreated || resp.StatusCode == http.StatusNoContent || resp.StatusCode == http.StatusOK {
+				slog.Info("Keto relation created", "namespace", namespace, "object", object, "relation", relation, "subject", subject)
+				return nil
+			}
+			resBody, _ := io.ReadAll(resp.Body)
+			lastErr = fmt.Errorf("keto returned status %d: %s", resp.StatusCode, string(resBody))
+		} else {
+			lastErr = err
+		}
+
+		time.Sleep(backoff)
+		backoff *= 2
 	}
 
-	slog.Info("Keto relation created", "namespace", namespace, "object", object, "relation", relation, "subject", subject)
-	return nil
+	slog.Error("Keto create relation failed after retries", "error", lastErr)
+	return lastErr
 }
 
 func (s *ketoService) DeleteRelation(ctx context.Context, namespace, object, relation, subject string) error {