more platform

cmd/catalog-emit/main.go

@@ -82,7 +82,7 @@ type TenantState struct {
 	mu    sync.RWMutex
 	items map[string]catalog.Projection
 
-	holder *catalog.SnapshotHolder
+	holder *catalog.SnapshotHolder[catalog.Projection]
 	path   string // <out-dir>/<tenant>.bin
 
 	rebuildCount atomic.Uint64
@@ -92,7 +92,7 @@ type TenantState struct {
 
 // newTenantState wires a brand-new tenant. Caller is responsible for
 // calling rebuild() (or Open via the initial state pipeline) before any Get.
-func newTenantState(tenant string, sch catalog.Schema, holder *catalog.SnapshotHolder, path string) *TenantState {
+func newTenantState(tenant string, sch catalog.Schema, holder *catalog.SnapshotHolder[catalog.Projection], path string) *TenantState {
 	return &TenantState{
 		tenant: tenant,
 		schema: sch,
@@ -148,9 +148,9 @@ func (ts *TenantState) rebuild(batch []catalog.ProjectionUpdate) error {
 // writeSnapshot emits snapshot to disk (atomic temp+rename) and reloads
 // the holder. Called WITHOUT holding ts.mu.
 func (ts *TenantState) writeSnapshot(snap []catalog.Projection) error {
-	w := catalog.NewSnapshotWriter().WithTenant(ts.tenant)
+	w := catalog.NewSnapshotWriter[catalog.Projection]().WithTenant(ts.tenant)
 	for _, p := range snap {
-		if err := w.Append(p); err != nil {
+		if err := w.Append(p.SKU, p); err != nil {
 			return fmt.Errorf("append %s: %w", p.SKU, err)
 		}
 	}
@@ -260,7 +260,7 @@ func main() {
 			sch.Tenant = t
 		}
 		path := filepath.Join(*outDir, t+".bin")
-		holder := catalog.NewSnapshotHolder(*drainGrace)
+		holder := catalog.NewSnapshotHolder[catalog.Projection](*drainGrace)
 		states[t] = newTenantState(t, sch, holder, path)
 	}
 	// Register cleanup for both the defer path (graceful shutdown / SIGINT)