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Evergreen.Health.Application/Health/Scenes/LightOffDispatcher.cs

@@ -0,0 +1,25 @@
+namespace Evergreen.Health.Application.Health.Scenes;
+
+public interface ILightOffHandler
+{
+    Task HandleAsync(CancellationToken cancellationToken);
+}
+
+/// <summary>跨设备联动由场景层分发；灯具不需要知道其他家具实体。</summary>
+public sealed class LightOffDispatcher
+{
+    private readonly IReadOnlyList<ILightOffHandler> _handlers;
+    public LightOffDispatcher(IEnumerable<ILightOffHandler> handlers) => _handlers = handlers.ToArray();
+    public async Task NotifyAsync(CancellationToken cancellationToken)
+    {
+        var failures = new List<Exception>();
+        foreach (var handler in _handlers)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+            try { await handler.HandleAsync(cancellationToken); }
+            catch (Exception exception) when (exception is not OperationCanceledException) { failures.Add(exception); }
+        }
+        if (failures.Count > 0)
+            throw new AggregateException("灯光已关闭，但部分安全联动未完成", failures);
+    }
+}