Joseph Doherty
37 lines
2.1 KiB
C#
37 lines
2.1 KiB
C#
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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/// Singleton last-snapshot-per-<c>(instance, host)</c> cache of driver resilience status
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/// (breaker open / consecutive failures / in-flight depth). Populated by
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/// <c>DriverResilienceStatusBridge</c> as it forwards <c>driver-resilience-status</c> DPS
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/// messages; read in-process by the driver status panel's resilience section via
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/// <see cref="SnapshotChanged"/> + <see cref="GetForInstance"/>. Mirrors
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/// <see cref="IDriverStatusSnapshotStore"/> — the panel reads this singleton directly instead of
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/// opening a self-targeted SignalR connection (which a server-side Blazor component cannot reach
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/// behind a reverse proxy).
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/// </summary>
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public interface IDriverResilienceStatusStore
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{
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/// <summary>Stores or replaces the last-known resilience snapshot for a <c>(instance, host)</c> pair.</summary>
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/// <param name="snapshot">The resilience status snapshot to store.</param>
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void Upsert(DriverResilienceStatusChanged snapshot);
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/// <summary>Returns every stored host snapshot for one driver instance (empty if none).</summary>
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/// <param name="driverInstanceId">The driver instance's stable logical ID.</param>
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/// <returns>The per-host resilience snapshots for that instance.</returns>
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IReadOnlyList<DriverResilienceStatusChanged> GetForInstance(string driverInstanceId);
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/// <summary>Returns a point-in-time snapshot of every tracked <c>(instance, host)</c> pair.</summary>
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/// <returns>A read-only collection of the last-known resilience snapshot for each pair.</returns>
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IReadOnlyCollection<DriverResilienceStatusChanged> GetAll();
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/// <summary>
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/// Raised after every <see cref="Upsert"/> with the just-stored snapshot. Lets the Blazor Server
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/// driver status panel receive live updates by reading this singleton directly. Handlers run on
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/// the caller's thread (the bridge actor), so subscribers must marshal to their own sync context.
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/// </summary>
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event Action<DriverResilienceStatusChanged>? SnapshotChanged;
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}
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