radial sugiyama positioning integration

backend_go/snapshot_service.go

@@ -6,10 +6,12 @@ import (
 )
 
 type snapshotKey struct {
-	NodeLimit      int
-	EdgeLimit      int
-	IncludeBNodes  bool
-	GraphQueryID   string
+	NodeLimit     int
+	EdgeLimit     int
+	IncludeBNodes bool
+	GraphQueryID  string
+	LayoutEngine  string
+	LayoutRootIRI string
 }
 
 type snapshotInflight struct {
@@ -37,7 +39,14 @@ func NewGraphSnapshotService(sparql *AnzoGraphClient, cfg Config) *GraphSnapshot
 }
 
 func (s *GraphSnapshotService) Get(ctx context.Context, nodeLimit int, edgeLimit int, graphQueryID string) (GraphResponse, error) {
-	key := snapshotKey{NodeLimit: nodeLimit, EdgeLimit: edgeLimit, IncludeBNodes: s.cfg.IncludeBNodes, GraphQueryID: graphQueryID}
+	key := snapshotKey{
+		NodeLimit:     nodeLimit,
+		EdgeLimit:     edgeLimit,
+		IncludeBNodes: s.cfg.IncludeBNodes,
+		GraphQueryID:  graphQueryID,
+		LayoutEngine:  s.cfg.HierarchyLayoutEngine,
+		LayoutRootIRI: s.cfg.HierarchyLayoutRootIRI,
+	}
 
 	s.mu.Lock()
 	if snap, ok := s.cache[key]; ok {