f18c285cca
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New per-admin-node actor that subscribes to the fleet-status DistributedPubSub topic + forwards every FleetStatusChanged snapshot to all SignalR clients connected to FleetStatusHub via IHubContext. Wired via WithOtOpcUaSignalRBridges (new AkkaConfigurationBuilder extension in AdminUI.Hubs) — Program.cs calls it inside the if(hasAdmin) block alongside WithOtOpcUaControlPlaneSingletons. Per-node subscription rather than cluster-singleton: every admin node forwards its own snapshots to its own connected clients. Simpler than singleton coordination + acceptable because the messages are small and SignalR fan-out is per-node anyway.
40 lines
1.5 KiB
C#
40 lines
1.5 KiB
C#
using Akka.Actor;
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using Akka.Hosting;
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using Microsoft.AspNetCore.SignalR;
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using Microsoft.Extensions.DependencyInjection;
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namespace ZB.MOM.WW.OtOpcUa.AdminUI.Hubs;
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public static class HubServiceCollectionExtensions
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{
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public const string FleetStatusSignalRBridgeName = "fleet-status-signalr-bridge";
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/// <summary>
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/// Spawns the SignalR bridge actors that forward DPS messages to browser-facing SignalR
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/// hubs. Currently: <see cref="FleetStatusSignalRBridge"/> (DPS <c>fleet-status</c> topic →
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/// <see cref="FleetStatusHub"/> clients).
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///
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/// Call inside the admin-role configurator on the shared <see cref="AkkaConfigurationBuilder"/>:
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/// <code>
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/// if (hasAdmin)
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/// {
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/// ab.WithOtOpcUaControlPlaneSingletons();
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/// ab.WithOtOpcUaSignalRBridges();
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/// }
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/// </code>
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/// </summary>
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public static AkkaConfigurationBuilder WithOtOpcUaSignalRBridges(this AkkaConfigurationBuilder builder)
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{
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builder.WithActors((system, registry, resolver) =>
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{
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var hub = resolver.GetService<IHubContext<FleetStatusHub>>();
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var actor = system.ActorOf(FleetStatusSignalRBridge.Props(hub), FleetStatusSignalRBridgeName);
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registry.Register<FleetStatusSignalRBridgeKey>(actor);
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});
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return builder;
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}
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}
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/// <summary>Marker key for <see cref="ActorRegistry"/> lookup of the SignalR bridge actor.</summary>
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public sealed class FleetStatusSignalRBridgeKey { }
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