更新框架

Source/Store.Management.Framework/Utilities/AsyncEvent.cs

@@ -0,0 +1,32 @@
+namespace Store.Management.Framework.Utilities;
+
+/// <summary>按订阅顺序等待异步处理器；异常向调用者传播并停止后续处理。</summary>
+public sealed class AsyncEvent<TEventArgs> where TEventArgs : EventArgs
+{
+	private readonly object _gate = new();
+	private readonly List<Func<object?, TEventArgs, Task>> _handlers = [];
+
+	public void Subscribe(Func<object?, TEventArgs, Task> callback)
+	{
+		ArgumentNullException.ThrowIfNull(callback);
+		lock (_gate) { _handlers.Add(callback); }
+	}
+
+	public void Unsubscribe(Func<object?, TEventArgs, Task> callback)
+	{
+		ArgumentNullException.ThrowIfNull(callback);
+		lock (_gate)
+		{
+			int index = _handlers.LastIndexOf(callback);
+			if (index >= 0) _handlers.RemoveAt(index);
+		}
+	}
+
+	public async Task InvokeAsync(object? sender, TEventArgs eventArgs)
+	{
+		ArgumentNullException.ThrowIfNull(eventArgs);
+		Func<object?, TEventArgs, Task>[] snapshot;
+		lock (_gate) { snapshot = _handlers.ToArray(); }
+		foreach (var callback in snapshot) await callback(sender, eventArgs);
+	}
+}