Add an event notification for when the action is invoked

src/Microsoft.AspNet.Mvc.Core/MvcRouteHandler.cs

@@ -85,6 +85,13 @@ namespace Microsoft.AspNet.Mvc
                     await InvokeActionAsync(context, actionDescriptor);
                     context.IsHandled = true;
                 }
+
+                if (_notifier.ShouldNotify("Microsoft.AspNet.Mvc.ActionInvoked"))
+                {
+                    _notifier.Notify(
+                        "Microsoft.AspNet.Mvc.ActionInvoked",
+                        new { actionDescriptor, httpContext = context.HttpContext });
+                }
             }
             finally
             {

test/Microsoft.AspNet.Mvc.Core.Test/MvcRouteHandlerTests.cs

@@ -179,6 +179,24 @@ namespace Microsoft.AspNet.Mvc
             Assert.Contains(routeValues, kvp => kvp.Key == "tag" && string.Equals(kvp.Value, "value"));
         }
 
+        [Fact]
+        public async Task RouteAsync_Notifies_ActionInvoked()
+        {
+            // Arrange
+            var listener = new TestNotificationListener();
+
+            var context = CreateRouteContext(notificationListener: listener);
+
+            var handler = new MvcRouteHandler();
+
+            // Act
+            await handler.RouteAsync(context);
+
+            // Assert
+            Assert.NotNull(listener?.ActionInvoked.ActionDescriptor);
+            Assert.NotNull(listener?.ActionInvoked.HttpContext);
+        }
+
         private RouteContext CreateRouteContext(
             ActionDescriptor actionDescriptor = null,
             IActionSelector actionSelector = null,

test/Microsoft.AspNet.Mvc.TestCommon/Notification/TestNotificationListener.cs

@@ -23,11 +23,31 @@ namespace Microsoft.AspNet.Mvc.TestCommon.Notification
             };
         }
 
+        public OnActionInvokedEventData ActionInvoked { get; set; }
+
+        [NotificationName("Microsoft.AspNet.Mvc.ActionInvoked")]
+        public virtual void OnActionInvoked(
+            IHttpContext httpContext,
+            IActionDescriptor actionDescriptor)
+        {
+            ActionInvoked = new OnActionInvokedEventData()
+            {
+                ActionDescriptor = actionDescriptor,
+                HttpContext = httpContext,
+            };
+        }
+
         public class OnActionSelectedEventData
         {
             public IActionDescriptor ActionDescriptor { get; set; }
             public IHttpContext HttpContext { get; set; }
             public IRouteData RouteData { get; set; }
         }
+
+        public class OnActionInvokedEventData
+        {
+            public IActionDescriptor ActionDescriptor { get; set; }
+            public IHttpContext HttpContext { get; set; }
+        }
     }
 }