事务性发件箱模式

libraries/HelloShop.EventBus.Logging/DistributedEventLog.cs

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+// Copyright (c) HelloShop Corporation. All rights reserved.
+// See the license file in the project root for more information.
+
+using HelloShop.EventBus.Abstractions;
+using System.Diagnostics.CodeAnalysis;
+
+namespace HelloShop.EventBus.Logging
+{
+    public enum DistributedEventStatus { NotPublished, InProgress, Published, PublishedFailed }
+
+    public class DistributedEventLog
+    {
+        public Guid EventId { get; set; }
+
+        public required string EventTypeName { get; set; }
+
+        public required DistributedEvent DistributedEvent { get; set; }
+
+        public DistributedEventStatus Status { get; set; } = DistributedEventStatus.NotPublished;
+
+        public int TimesSent { get; set; }
+
+        public DateTimeOffset CreationTime { get; init; } = TimeProvider.System.GetUtcNow();
+
+        public required Guid TransactionId { get; set; }
+
+        /// <summary>
+        /// EF Core cannot set navigation properties using a constructor.
+        /// The constructor can be public, private, or have any other accessibility. 
+        /// </summary>
+        private DistributedEventLog() { }
+
+        [SetsRequiredMembers]
+        public DistributedEventLog(DistributedEvent @event, Guid transactionId)
+        {
+            EventId = @event.Id;
+            EventTypeName = @event.GetType().Name;
+            DistributedEvent = @event;
+            TransactionId = transactionId;
+        }
+    }
+}