[Mvc] Add support for order in dynamic controller routes

src/Mvc/Mvc.Core/src/Builder/ControllerEndpointRouteBuilderExtensions.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
@@ -506,18 +506,10 @@ public static void MapDynamicControllerRoute<TTransformer>(this IEndpointRouteBu
             EnsureControllerServices(endpoints);
 
             // Called for side-effect to make sure that the data source is registered.
-            GetOrCreateDataSource(endpoints).CreateInertEndpoints = true;
-
-            endpoints.Map(
-                pattern, 
-                context =>
-                {
-                    throw new InvalidOperationException("This endpoint is not expected to be executed directly.");
-                })
-                .Add(b =>
-                {
-                    b.Metadata.Add(new DynamicControllerRouteValueTransformerMetadata(typeof(TTransformer), state));
-                });
+            var controllerDataSource = GetOrCreateDataSource(endpoints);
+
+            // The data source is just used to share the common order with conventionally routed actions.
+            controllerDataSource.AddDynamicControllerEndpoint(endpoints, pattern, typeof(TTransformer), state);
         }
 
         private static DynamicControllerMetadata CreateDynamicControllerMetadata(string action, string controller, string area)

src/Mvc/Mvc.Core/src/DependencyInjection/MvcCoreServiceCollectionExtensions.cs

@@ -269,6 +269,7 @@ internal static void AddMvcCoreServices(IServiceCollection services)
             //
             // Endpoint Routing / Endpoints
             //
+            services.TryAddSingleton<OrderedEndpointsSequenceProvider>();
             services.TryAddSingleton<ControllerActionEndpointDataSource>();
             services.TryAddSingleton<ActionEndpointFactory>();
             services.TryAddSingleton<DynamicControllerEndpointSelector>();

src/Mvc/Mvc.Core/src/DependencyInjection/OrderedEndpointsSequenceProvider.cs

@@ -0,0 +1,26 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace Microsoft.AspNetCore.Mvc.Infrastructure
+{
+    internal class OrderedEndpointsSequenceProvider
+    {
+        private object Lock = new object();
+
+        // In traditional conventional routing setup, the routes defined by a user have a order
+        // defined by how they are added into the list. We would like to maintain the same order when building
+        // up the endpoints too.
+        //
+        // Start with an order of '1' for conventional routes as attribute routes have a default order of '0'.
+        // This is for scenarios dealing with migrating existing Router based code to Endpoint Routing world.
+        private int _current = 1;
+
+        public int GetNext()
+        {
+            lock (Lock)
+            {
+                return _current++;
+            }
+        }
+    }
+}

src/Mvc/Mvc.Core/src/Routing/ControllerActionEndpointDataSource.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
@@ -15,27 +15,19 @@ namespace Microsoft.AspNetCore.Mvc.Routing
     internal class ControllerActionEndpointDataSource : ActionEndpointDataSourceBase
     {
         private readonly ActionEndpointFactory _endpointFactory;
+        private readonly OrderedEndpointsSequenceProvider _orderSequence;
         private readonly List<ConventionalRouteEntry> _routes;
 
-        private int _order;
-
         public ControllerActionEndpointDataSource(
             IActionDescriptorCollectionProvider actions,
-            ActionEndpointFactory endpointFactory)
+            ActionEndpointFactory endpointFactory,
+            OrderedEndpointsSequenceProvider orderSequence)
             : base(actions)
         {
             _endpointFactory = endpointFactory;
-
+            _orderSequence = orderSequence;
             _routes = new List<ConventionalRouteEntry>();
 
-            // In traditional conventional routing setup, the routes defined by a user have a order
-            // defined by how they are added into the list. We would like to maintain the same order when building
-            // up the endpoints too.
-            //
-            // Start with an order of '1' for conventional routes as attribute routes have a default order of '0'.
-            // This is for scenarios dealing with migrating existing Router based code to Endpoint Routing world.
-            _order = 1;
-
             DefaultBuilder = new ControllerActionEndpointConventionBuilder(Lock, Conventions);
 
             // IMPORTANT: this needs to be the last thing we do in the constructor.
@@ -59,7 +51,7 @@ public ControllerActionEndpointConventionBuilder AddRoute(
             lock (Lock)
             {
                 var conventions = new List<Action<EndpointBuilder>>();
-                _routes.Add(new ConventionalRouteEntry(routeName, pattern, defaults, constraints, dataTokens, _order++, conventions));
+                _routes.Add(new ConventionalRouteEntry(routeName, pattern, defaults, constraints, dataTokens, _orderSequence.GetNext(), conventions));
                 return new ControllerActionEndpointConventionBuilder(Lock, conventions);
             }
         }
@@ -108,6 +100,27 @@ protected override List<Endpoint> CreateEndpoints(IReadOnlyList<ActionDescriptor
 
             return endpoints;
         }
+
+        internal void AddDynamicControllerEndpoint(IEndpointRouteBuilder endpoints, string pattern, Type transformerType, object state)
+        {
+            CreateInertEndpoints = true;
+            lock (Lock)
+            {
+                var order = _orderSequence.GetNext();
+
+                endpoints.Map(
+                    pattern,
+                    context =>
+                    {
+                        throw new InvalidOperationException("This endpoint is not expected to be executed directly.");
+                    })
+                    .Add(b =>
+                    {
+                        ((RouteEndpointBuilder)b).Order = order;
+                        b.Metadata.Add(new DynamicControllerRouteValueTransformerMetadata(transformerType, state));
+                    });
+            }
+        }
     }
 }
 

src/Mvc/Mvc.Core/test/Routing/ControllerActionEndpointDataSourceTest.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
@@ -385,7 +385,7 @@ private static bool SupportsLinkGeneration(RouteEndpoint endpoint)
 
         private protected override ActionEndpointDataSourceBase CreateDataSource(IActionDescriptorCollectionProvider actions, ActionEndpointFactory endpointFactory)
         {
-            return new ControllerActionEndpointDataSource(actions, endpointFactory);
+            return new ControllerActionEndpointDataSource(actions, endpointFactory, new OrderedEndpointsSequenceProvider());
         }
 
         protected override ActionDescriptor CreateActionDescriptor(

src/Mvc/Mvc.RazorPages/src/Builder/RazorPagesEndpointRouteBuilderExtensions.cs

@@ -337,18 +337,9 @@ public static void MapDynamicPageRoute<TTransformer>(this IEndpointRouteBuilder
             EnsureRazorPagesServices(endpoints);
 
             // Called for side-effect to make sure that the data source is registered.
-            GetOrCreateDataSource(endpoints).CreateInertEndpoints = true;
+            var dataSource = GetOrCreateDataSource(endpoints);
 
-            endpoints.Map(
-                pattern,
-                context =>
-                {
-                    throw new InvalidOperationException("This endpoint is not expected to be executed directly.");
-                })
-                .Add(b =>
-                {
-                    b.Metadata.Add(new DynamicPageRouteValueTransformerMetadata(typeof(TTransformer), state));
-                });
+            dataSource.AddDynamicPageEndpoint(endpoints, pattern, typeof(TTransformer), state);
         }
 
         private static DynamicPageMetadata CreateDynamicPageMetadata(string page, string area)

src/Mvc/Mvc.RazorPages/src/Infrastructure/PageActionEndpointDataSource.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
@@ -8,18 +8,23 @@
 using Microsoft.AspNetCore.Mvc.Abstractions;
 using Microsoft.AspNetCore.Mvc.Infrastructure;
 using Microsoft.AspNetCore.Mvc.Routing;
+using Microsoft.AspNetCore.Routing;
 
 namespace Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure
 {
     internal class PageActionEndpointDataSource : ActionEndpointDataSourceBase
     {
         private readonly ActionEndpointFactory _endpointFactory;
+        private readonly OrderedEndpointsSequenceProvider _orderSequence;
 
-        public PageActionEndpointDataSource(IActionDescriptorCollectionProvider actions, ActionEndpointFactory endpointFactory)
+        public PageActionEndpointDataSource(
+            IActionDescriptorCollectionProvider actions,
+            ActionEndpointFactory endpointFactory,
+            OrderedEndpointsSequenceProvider orderedEndpoints)
             : base(actions)
         {
             _endpointFactory = endpointFactory;
-
+            _orderSequence = orderedEndpoints;
             DefaultBuilder = new PageActionEndpointConventionBuilder(Lock, Conventions);
 
             // IMPORTANT: this needs to be the last thing we do in the constructor.
@@ -47,6 +52,27 @@ protected override List<Endpoint> CreateEndpoints(IReadOnlyList<ActionDescriptor
 
             return endpoints;
         }
+
+        internal void AddDynamicPageEndpoint(IEndpointRouteBuilder endpoints, string pattern, Type transformerType, object state)
+        {
+            CreateInertEndpoints = true;
+            lock (Lock)
+            {
+                var order = _orderSequence.GetNext();
+
+                endpoints.Map(
+                    pattern,
+                    context =>
+                    {
+                        throw new InvalidOperationException("This endpoint is not expected to be executed directly.");
+                    })
+                    .Add(b =>
+                    {
+                        ((RouteEndpointBuilder)b).Order = order;
+                        b.Metadata.Add(new DynamicPageRouteValueTransformerMetadata(transformerType, state));
+                    });
+            }
+        }
     }
 }
 

src/Mvc/Mvc.RazorPages/test/Infrastructure/PageActionEndpointDataSourceTest.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
@@ -92,7 +92,7 @@ public void Endpoints_AppliesConventions()
 
         private protected override ActionEndpointDataSourceBase CreateDataSource(IActionDescriptorCollectionProvider actions, ActionEndpointFactory endpointFactory)
         {
-            return new PageActionEndpointDataSource(actions, endpointFactory);
+            return new PageActionEndpointDataSource(actions, endpointFactory, new OrderedEndpointsSequenceProvider());
         }
 
         protected override ActionDescriptor CreateActionDescriptor(

src/Mvc/benchmarks/Microsoft.AspNetCore.Mvc.Performance/ControllerActionEndpointDatasourceBenchmark.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
@@ -110,7 +110,8 @@ private ControllerActionEndpointDataSource CreateDataSource(IActionDescriptorCol
         {
             var dataSource = new ControllerActionEndpointDataSource(
                 actionDescriptorCollectionProvider,
-                new ActionEndpointFactory(new MockRoutePatternTransformer()));
+                new ActionEndpointFactory(new MockRoutePatternTransformer()),
+                new OrderedEndpointsSequenceProvider());
 
             return dataSource;
         }