Joseph Doherty
662f3f9f5c
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- Topic-name drift fix: DriverHealthChanged.TopicName and DriverControlTopic.Name now live on the message contracts in Commons. AkkaDriverHealthPublisher, DriverStatusSignalRBridge, DriverHostActor, and AdminOperationsActor all delegate to the single constant so a rename can't silently desynchronise publisher and subscriber. - DriverStatusPanel._opResultClearTimer switched from System.Timers.Timer to System.Threading.Timer + awaited DisposeAsync. Prevents an in-flight 8s clear-callback from invoking StateHasChanged on a component whose hub has already been released. - PublishHealthSnapshot deduplicates against the last published (state, lastSuccess, lastError, errorCount) fingerprint. The 30s heartbeat no longer floods the SignalR layer with identical Healthy snapshots — newly-joined clients still warm up via the snapshot store on JoinDriver.
59 lines
2.5 KiB
C#
59 lines
2.5 KiB
C#
using Akka.Actor;
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using Akka.Cluster.Tools.PublishSubscribe;
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using Akka.Event;
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using Microsoft.AspNetCore.SignalR;
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using ZB.MOM.WW.OtOpcUa.Commons.Messages.Drivers;
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namespace ZB.MOM.WW.OtOpcUa.AdminUI.Hubs;
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/// <summary>
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/// Akka actor that subscribes to the <c>driver-health</c> DistributedPubSub topic and
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/// forwards every <see cref="DriverHealthChanged"/> snapshot to (a) the in-memory snapshot
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/// store and (b) all SignalR clients connected to <see cref="DriverStatusHub"/> grouped
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/// by <see cref="DriverHealthChanged.DriverInstanceId"/>. Spawned on admin-role nodes by
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/// <c>AddOtOpcUaSignalRBridges</c>.
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/// </summary>
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public sealed class DriverStatusSignalRBridge : ReceiveActor
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{
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public const string TopicName = DriverHealthChanged.TopicName;
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private readonly IHubContext<DriverStatusHub> _hub;
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private readonly IDriverStatusSnapshotStore _store;
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private readonly ILoggingAdapter _log = Context.GetLogger();
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/// <summary>Creates actor props for a <see cref="DriverStatusSignalRBridge"/>.</summary>
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/// <param name="hub">The SignalR hub context for pushing snapshots to grouped clients.</param>
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/// <param name="store">Snapshot store updated before each SignalR push.</param>
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public static Props Props(IHubContext<DriverStatusHub> hub, IDriverStatusSnapshotStore store) =>
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Akka.Actor.Props.Create(() => new DriverStatusSignalRBridge(hub, store));
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/// <summary>Initializes a new instance of <see cref="DriverStatusSignalRBridge"/>.</summary>
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/// <param name="hub">The SignalR hub context for pushing snapshots to grouped clients.</param>
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/// <param name="store">Snapshot store updated before each SignalR push.</param>
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public DriverStatusSignalRBridge(IHubContext<DriverStatusHub> hub, IDriverStatusSnapshotStore store)
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{
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_hub = hub;
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_store = store;
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ReceiveAsync<DriverHealthChanged>(ForwardAsync);
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Receive<SubscribeAck>(_ => { /* DPS confirmation */ });
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}
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/// <inheritdoc />
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protected override void PreStart() =>
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DistributedPubSub.Get(Context.System).Mediator.Tell(new Subscribe(TopicName, Self));
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private async Task ForwardAsync(DriverHealthChanged msg)
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{
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try
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{
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_store.Upsert(msg);
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await _hub.Clients.Group(DriverStatusHub.GroupName(msg.DriverInstanceId))
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.SendAsync(DriverStatusHub.MethodName, msg);
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}
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catch (Exception ex)
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{
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_log.Warning(ex, "DriverStatusSignalRBridge: SignalR push failed (instance={Instance})", msg.DriverInstanceId);
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}
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}
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}
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