add IntegrationEventNameAttribute

src/BuildingBlocks/EventBus/EventBus/Events/IntegrationEventNameAttribute.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events
+{
+    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
+    public class IntegrationEventNameAttribute : Attribute
+    {
+        public string EventName { get; private set; }
+        
+        public IntegrationEventNameAttribute(string eventName)
+        {
+            EventName = eventName;
+        }
+    }
+}

src/BuildingBlocks/EventBus/EventBus/Extensions/IntegrationEventNameExtensions.cs

@@ -0,0 +1,21 @@
+using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
+
+namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Extensions
+{
+    public static class IntegrationEventNameExtensions
+    {
+        public static string GetEventName(this IntegrationEvent @event)
+        {
+            var type = @event.GetType();
+            var attributes = type.GetCustomAttributes(false);
+            foreach (var attr in attributes)
+            {
+                //if class contains IntegrationEventNameAttribute take event name from attribute
+                if (attr is IntegrationEventNameAttribute eventInfoAttribute)
+                    return eventInfoAttribute.EventName;
+            }
+
+            return type.Name; //otherwise event name is class name
+        }
+    }
+}

src/BuildingBlocks/EventBus/EventBus/InMemoryEventBusSubscriptionsManager.cs

@@ -156,7 +156,16 @@ namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBus
 
         public string GetEventKey<T>()
         {
-            return typeof(T).Name;
+            var type = typeof(T);
+            var attributes = type.GetCustomAttributes(false);
+            foreach (var attr in attributes)
+            {
+                //if class contains IntegrationEventNameAttribute take event name from attribute
+                if (attr is IntegrationEventNameAttribute eventInfoAttribute)
+                    return eventInfoAttribute.EventName;
+            }
+
+            return type.Name; //otherwise event name is class name
         }
     }
 }