MM-27353 Mini image previews (#15376)

store/retrylayer/retrylayer.go

@@ -2916,6 +2916,26 @@ func (s *RetryLayerFileInfoStore) Save(info *model.FileInfo) (*model.FileInfo, e
 
 }
 
+func (s *RetryLayerFileInfoStore) Upsert(info *model.FileInfo) (*model.FileInfo, error) {
+
+	tries := 0
+	for {
+		result, err := s.FileInfoStore.Upsert(info)
+		if err == nil {
+			return result, nil
+		}
+		if !isRepeatableError(err) {
+			return result, err
+		}
+		tries++
+		if tries >= 3 {
+			err = errors.Wrap(err, "giving up after 3 consecutive repeatable transaction failures")
+			return result, err
+		}
+	}
+
+}
+
 func (s *RetryLayerGroupStore) AdminRoleGroupsForSyncableMember(userID string, syncableID string, syncableType model.GroupSyncableType) ([]string, *model.AppError) {
 
 	return s.GroupStore.AdminRoleGroupsForSyncableMember(userID, syncableID, syncableType)