fix(demo): initialize NATS adapters and add GetPubSubName function (#2423)

Author: asoorm

demo/cmd/all/main.go

@@ -37,6 +37,9 @@ func main() {
 			ProductsFG:   *productsFeatureSubgraph,
 		},
 		EnableDebug: *debug,
+		GetPubSubName: func(name string) string {
+			return name
+		},
 	}
 	ctx := context.Background()
 	subgraphs, err := subgraphs.New(ctx, &config)

demo/pkg/subgraphs/subgraphs.go

@@ -218,6 +218,9 @@ func New(ctx context.Context, config *Config) (*Subgraphs, error) {
 	if err != nil {
 		return nil, fmt.Errorf("failed to create default nats adapter: %w", err)
 	}
+	if err := defaultAdapter.Startup(ctx); err != nil {
+		return nil, fmt.Errorf("failed to start default nats adapter: %w", err)
+	}
 	natsPubSubByProviderID["default"] = defaultAdapter
 
 	myNatsAdapter, err := natsPubsub.NewAdapter(ctx, zap.NewNop(), url, []nats.Option{}, "hostname", "test", datasource.ProviderOpts{
@@ -226,6 +229,9 @@ func New(ctx context.Context, config *Config) (*Subgraphs, error) {
 	if err != nil {
 		return nil, fmt.Errorf("failed to create my-nats adapter: %w", err)
 	}
+	if err := myNatsAdapter.Startup(ctx); err != nil {
+		return nil, fmt.Errorf("failed to start my-nats adapter: %w", err)
+	}
 	natsPubSubByProviderID["my-nats"] = myNatsAdapter
 
 	defaultConnection, err := nats.Connect(url)