[MM-59367] export: enable exporting thread followers for CRT (#27623)

server/channels/store/retrylayer/retrylayer.go

@@ -12365,6 +12365,27 @@ func (s *RetryLayerThreadStore) GetThreadForUser(threadMembership *model.ThreadM
 
 }
 
+func (s *RetryLayerThreadStore) GetThreadMembershipsForExport(postID string) ([]*model.ThreadMembershipForExport, error) {
+
+	tries := 0
+	for {
+		result, err := s.ThreadStore.GetThreadMembershipsForExport(postID)
+		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
+		}
+		timepkg.Sleep(100 * timepkg.Millisecond)
+	}
+
+}
+
 func (s *RetryLayerThreadStore) GetThreadUnreadReplyCount(threadMembership *model.ThreadMembership) (int64, error) {
 
 	tries := 0
@@ -12512,6 +12533,27 @@ func (s *RetryLayerThreadStore) MaintainMembership(userID string, postID string,
 
 }
 
+func (s *RetryLayerThreadStore) MaintainMultipleFromImport(memberships []*model.ThreadMembership) ([]*model.ThreadMembership, error) {
+
+	tries := 0
+	for {
+		result, err := s.ThreadStore.MaintainMultipleFromImport(memberships)
+		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
+		}
+		timepkg.Sleep(100 * timepkg.Millisecond)
+	}
+
+}
+
 func (s *RetryLayerThreadStore) MarkAllAsRead(userID string, threadIds []string) error {
 
 	tries := 0
@@ -12638,6 +12680,27 @@ func (s *RetryLayerThreadStore) PermanentDeleteBatchThreadMembershipsForRetentio
 
 }
 
+func (s *RetryLayerThreadStore) SaveMultipleMemberships(memberships []*model.ThreadMembership) ([]*model.ThreadMembership, error) {
+
+	tries := 0
+	for {
+		result, err := s.ThreadStore.SaveMultipleMemberships(memberships)
+		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
+		}
+		timepkg.Sleep(100 * timepkg.Millisecond)
+	}
+
+}
+
 func (s *RetryLayerThreadStore) UpdateMembership(membership *model.ThreadMembership) (*model.ThreadMembership, error) {
 
 	tries := 0