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fix(dashboard): guard stale-session batches inside the renderer dispatch; register IDashboardSessionEventSubscriber

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This commit is contained in:
Joseph Doherty
2026-08-15 20:26:42 -04:00
parent 10406a3541
commit 38dd7678f2
3 changed files with 91 additions and 21 deletions
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src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardServiceCollectionExtensions.cs
+11 -1
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@@ -51,7 +51,17 @@ public static class DashboardServiceCollectionExtensions
// Singleton: EventsHub instances are transient (one per hub invocation), so the
// subscriber bookkeeping they share with the broadcaster must outlive them.
services.AddSingleton<Hubs.EventsHubViewerRegistry>();
services.AddSingleton<Hubs.IDashboardEventBroadcaster, Hubs.DashboardEventBroadcaster>();
// One instance behind two interfaces, registered concretely and forwarded: the
// publish side (IDashboardEventBroadcaster, driven by the session pipeline) and
// the in-process subscribe side (IDashboardSessionEventSubscriber, used by the
// session-details page) share subscriber bookkeeping, so resolving them to two
// instances would leave the page subscribed to a mirror nobody publishes to.
services.AddSingleton<Hubs.DashboardEventBroadcaster>();
services.AddSingleton<Hubs.IDashboardEventBroadcaster>(
static provider => provider.GetRequiredService<Hubs.DashboardEventBroadcaster>());
services.AddSingleton<Hubs.IDashboardSessionEventSubscriber>(
static provider => provider.GetRequiredService<Hubs.DashboardEventBroadcaster>());
services.AddSingleton<Hubs.DashboardSnapshotHubConnectionCounter>();
services.AddHostedService<Hubs.DashboardSnapshotPublisher>();
services.AddHostedService<Hubs.AlarmsHubPublisher>();