fix(r2-10): in-process resilience status store

2026-07-13 10:43:47 -04:00
parent 12b2ce078b
commit 99ce5b401e
5 changed files with 158 additions and 1 deletions
@@ -0,0 +1,33 @@
+using System.Collections.Concurrent;
+using ZB.MOM.WW.OtOpcUa.Commons.Messages.Drivers;
+
+namespace ZB.MOM.WW.OtOpcUa.AdminUI.Hubs;
+
+/// <summary>
+///     Thread-safe in-memory implementation of <see cref="IDriverResilienceStatusStore"/>.
+///     Keyed by <c>(DriverInstanceId, HostName)</c>; last write wins.
+/// </summary>
+public sealed class InMemoryDriverResilienceStatusStore : IDriverResilienceStatusStore
+{
+    private readonly ConcurrentDictionary<(string Instance, string Host), DriverResilienceStatusChanged> _byPair = new();
+
+    /// <inheritdoc />
+    public event Action<DriverResilienceStatusChanged>? SnapshotChanged;
+
+    /// <inheritdoc />
+    public void Upsert(DriverResilienceStatusChanged snapshot)
+    {
+        _byPair[(snapshot.DriverInstanceId, snapshot.HostName)] = snapshot;
+        // Capture-then-invoke so a concurrent unsubscribe can't null the delegate mid-raise.
+        SnapshotChanged?.Invoke(snapshot);
+    }
+
+    /// <inheritdoc />
+    public IReadOnlyList<DriverResilienceStatusChanged> GetForInstance(string driverInstanceId) =>
+        _byPair.Values
+            .Where(s => string.Equals(s.DriverInstanceId, driverInstanceId, StringComparison.Ordinal))
+            .ToList();
+
+    /// <inheritdoc />
+    public IReadOnlyCollection<DriverResilienceStatusChanged> GetAll() => _byPair.Values.ToArray();
+}