Update to ServiceComposer 4.2.0 and use contractless composition handlers

ASP.Net Core API Gateway - 01/Catalog.ViewModelComposition/Catalog.ViewModelComposition.csproj

@@ -6,7 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.1.3" />
+    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.2.0-beta.3" />
   </ItemGroup>
 
   <ItemGroup>

ASP.Net Core API Gateway - 01/Composition.Tests/When_calling_composition_gateway.cs

@@ -54,8 +54,8 @@ public async Task Get_composed_product_should_return_expected_values()
                     HttpClient ClientProvider(string name) =>
                         name switch
                         {
-                            var val when val == typeof(Shipping.ViewModelComposition.ProductDetailsGetHandler).FullName => _shippingApiClient,
-                            var val when val == typeof(Warehouse.ViewModelComposition.ProductDetailsGetHandler).FullName => _warehouseApiClient,
+                            var val when val == typeof(Shipping.ViewModelComposition.CompositionHandlers.ProductDetailsCompositionHandler).FullName => _shippingApiClient,
+                            var val when val == typeof(Warehouse.ViewModelComposition.CompositionHandlers.ProductDetailsCompositionHandler).FullName => _warehouseApiClient,
                             var val when val == typeof(Sales.ViewModelComposition.ProductDetailsGetHandler).FullName => _salesApiClient,
                             var val when val == typeof(Catalog.ViewModelComposition.ProductDetailsGetHandler).FullName => _catalogApiClient,
                             _ => throw new NotSupportedException($"Missing HTTP client for {name}")
@@ -72,6 +72,7 @@ HttpClient ClientProvider(string name) =>
 
             // Act
             var composedResponse = await compositionClient.GetAsync("/products/details/1");
+            var stringContent = await composedResponse.Content.ReadAsStringAsync();
             dynamic composedViewModel = await composedResponse.Content.AsExpando();
 
             // Assert
@@ -80,9 +81,10 @@ HttpClient ClientProvider(string name) =>
             Assert.Equal("Banana Holder", composedViewModel.ProductName);
             Assert.Equal("Outdoor travel cute banana protector storage box", composedViewModel.ProductDescription);
             Assert.Equal(10, composedViewModel.ProductPrice);
-            Assert.Equal(4, composedViewModel.ProductInventory);
-            Assert.Equal(false, composedViewModel.ProductOutOfStock);
+
             Assert.Equal("Express Delivery, Regular mail", composedViewModel.ProductShippingOptions);
+            Assert.Equal(false, composedViewModel.ProductOutOfStock);
+            Assert.Equal(4, composedViewModel.ProductInventory);
         }
     }
 }

ASP.Net Core API Gateway - 01/CompositionGateway/CompositionGateway.csproj

@@ -4,7 +4,7 @@
     <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.1.3" />
+    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.2.0-beta.3" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Catalog.ViewModelComposition\Catalog.ViewModelComposition.csproj" />

ASP.Net Core API Gateway - 01/CompositionGateway/Startup.cs

@@ -9,9 +9,11 @@ public class Startup
     {
         public void ConfigureServices(IServiceCollection services)
         {
+            services.AddHttpContextAccessor();
             services.AddHttpClient();
             services.AddRouting();
             services.AddViewModelComposition();
+            services.AddControllers();
         }
 
         public void Configure(IApplicationBuilder app, ILoggerFactory loggerFactory)

ASP.Net Core API Gateway - 01/ConfigurationUtils/ConfigurationUtils.csproj

@@ -5,7 +5,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="ServiceComposer.AspNetCore" Version="4.1.3" />
+        <PackageReference Include="ServiceComposer.AspNetCore" Version="4.2.0-beta.3" />
     </ItemGroup>
 
 </Project>

ASP.Net Core API Gateway - 01/Sales.ViewModelComposition/Sales.ViewModelComposition.csproj

@@ -6,7 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.1.3" />
+    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.2.0-beta.3" />
   </ItemGroup>
 
   <ItemGroup>

ASP.Net Core API Gateway - 01/Shipping.ViewModelComposition/CompositionHandlers/ProductDetailsCompositionHandler.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using JsonUtils;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using ServiceComposer.AspNetCore;
+
+namespace Shipping.ViewModelComposition.CompositionHandlers;
+
+public class ProductDetailsCompositionHandler(HttpClient client, IHttpContextAccessor httpContextAccessor)
+{
+    [HttpGet("/products/details/{id}")]
+    public async Task Get(string id)
+    {
+        var url = $"/api/shipping-options/product/{id}";
+        var response = await client.GetAsync(url);
+
+        dynamic productShippingOptions = await response.Content.AsExpando();
+
+        var options = ((IEnumerable<dynamic>)productShippingOptions.Options)
+            .Select(o => o.Option)
+            .ToArray();
+
+        var vm = httpContextAccessor.HttpContext.Request.GetComposedResponseModel();
+        vm.ProductShippingOptions = string.Join(", ", options);
+    }
+}

ASP.Net Core API Gateway - 01/Shipping.ViewModelComposition/Shipping.ViewModelComposition.csproj

@@ -6,7 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.1.3" />
+    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.2.0-beta.3" />
   </ItemGroup>
 
   <ItemGroup>

ASP.Net Core API Gateway - 01/Shipping.ViewModelComposition/ViewModelCompositionOptionsCustomization.cs

@@ -3,14 +3,15 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using ServiceComposer.AspNetCore;
+using Shipping.ViewModelComposition.CompositionHandlers;
 
 namespace Shipping.ViewModelComposition
 {
     public class ViewModelCompositionOptionsCustomization : IViewModelCompositionOptionsCustomization
     {
         public void Customize(ViewModelCompositionOptions options)
         {
-            options.RegisterHttpClient<ProductDetailsGetHandler>((serviceProvider, httpClient) =>
+            options.RegisterHttpClient<ProductDetailsCompositionHandler>((serviceProvider, httpClient) =>
             {
                 var configuration = serviceProvider.GetService<IConfiguration>();
                 var baseAddress = configuration?.GetSection("Shipping:BaseAddress").Value ?? "http://localhost:5004";

ASP.Net Core API Gateway - 01/Warehouse.ViewModelComposition/CompositionHandlers/ProductDetailsCompositionHandler.cs

@@ -0,0 +1,24 @@
+using System.Net.Http;
+using System.Threading.Tasks;
+using JsonUtils;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using ServiceComposer.AspNetCore;
+
+namespace Warehouse.ViewModelComposition.CompositionHandlers;
+
+public class ProductDetailsCompositionHandler(HttpClient client, IHttpContextAccessor httpContextAccessor)
+{
+    [HttpGet("/products/details/{id}")]
+    public async Task Get(string id)
+    {
+        var url = $"/api/inventory/product/{id}";
+        var response = await client.GetAsync(url);
+
+        dynamic stockItem = await response.Content.AsExpando();
+
+        dynamic vm = httpContextAccessor.HttpContext.Request.GetComposedResponseModel();
+        vm.ProductInventory = stockItem.Inventory;
+        vm.ProductOutOfStock = stockItem.Inventory == 0;
+    }
+}

ASP.Net Core API Gateway - 01/Warehouse.ViewModelComposition/ViewModelCompositionOptionsCustomization.cs

@@ -1,15 +1,14 @@
-using System;
-using ConfigurationUtils;
-using Microsoft.Extensions.DependencyInjection;
+using ConfigurationUtils;
 using ServiceComposer.AspNetCore;
+using Warehouse.ViewModelComposition.CompositionHandlers;
 
 namespace Warehouse.ViewModelComposition
 {
     public class ViewModelCompositionOptionsCustomization : IViewModelCompositionOptionsCustomization
     {
         public void Customize(ViewModelCompositionOptions options)
         {
-            options.RegisterHttpClient<ProductDetailsGetHandler>("http://localhost:5003");
+            options.RegisterHttpClient<ProductDetailsCompositionHandler>("http://localhost:5003");
         }
     }
 }

ASP.Net Core API Gateway - 01/Warehouse.ViewModelComposition/Warehouse.ViewModelComposition.csproj

@@ -6,7 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.1.3" />
+    <PackageReference Include="ServiceComposer.AspNetCore" Version="4.2.0-beta.3" />
   </ItemGroup>
 
   <ItemGroup>

ASP.Net Core API Gateway - 01/nuget.config

@@ -15,5 +15,8 @@
         <packageSource key="ServiceComposer packages">
         <package pattern="*" />
     </packageSource>
+    <packageSource key="local packages">
+        <package pattern="*" />
+    </packageSource>
   </packageSourceMapping>
 </configuration>