ServiceComposer.AspNetCore 5.2.0

.NET 10.0

dotnet add package ServiceComposer.AspNetCore --version 5.2.0

NuGet\Install-Package ServiceComposer.AspNetCore -Version 5.2.0

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="ServiceComposer.AspNetCore" Version="5.2.0" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="ServiceComposer.AspNetCore" Version="5.2.0" />
                    

                            Directory.Packages.props

<PackageReference Include="ServiceComposer.AspNetCore" />
                    

                            Project file

For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.

paket add ServiceComposer.AspNetCore --version 5.2.0

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: ServiceComposer.AspNetCore, 5.2.0"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

#:package ServiceComposer.AspNetCore@5.2.0

#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.

#addin nuget:?package=ServiceComposer.AspNetCore&version=5.2.0
                    

                            Install as a Cake Addin

#tool nuget:?package=ServiceComposer.AspNetCore&version=5.2.0
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

ServiceComposer

ServiceComposer is a ViewModel Composition Gateway for ASP.NET Core.

Designing a UI when the back-end system consists of multiple autonomous services is challenging. ViewModel Composition solves this at the API gateway layer: each service contributes its own slice of data through an independent handler, all handlers run in parallel, and the gateway returns a single merged response to the caller.

Getting started

Install the package in your ASP.NET Core gateway project:

dotnet add package ServiceComposer.AspNetCore

Configure the gateway in Program.cs:

var builder = WebApplication.CreateBuilder();
builder.Services.AddRouting();
builder.Services.AddViewModelComposition();

var app = builder.Build();
app.MapCompositionHandlers();
app.Run();

Each service defines a composition handler that contributes its slice of data to the shared view model:

// In Sales.ViewModelComposition
public class SalesProductInfo : ICompositionRequestsHandler
{
    [HttpGet("/product/{id}")]
    public Task Handle(HttpRequest request)
    {
        var vm = request.GetComposedResponseModel();
        vm.ProductId = request.HttpContext.GetRouteValue("id").ToString();
        vm.ProductPrice = 100;
        return Task.CompletedTask;
    }
}

// In Marketing.ViewModelComposition
public class MarketingProductInfo : ICompositionRequestsHandler
{
    [HttpGet("/product/{id}")]
    public Task Handle(HttpRequest request)
    {
        var vm = request.GetComposedResponseModel();
        vm.ProductName = "Sample product";
        vm.ProductDescription = "This is a sample product";
        return Task.CompletedTask;
    }
}

Both handlers target the same route and run in parallel. Neither knows about the other. A GET to /product/1 returns a single merged JSON response:

{
  "productId": "1",
  "productPrice": 100,
  "productName": "Sample product",
  "productDescription": "This is a sample product"
}

Documentation

Product	Compatible and additional computed target framework versions.
.NET	net10.0 is compatible. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net10.0
- Microsoft.Extensions.DependencyModel (>= 10.0.3 && < 11.0.0)

NuGet packages (1)

Showing the top 1 NuGet packages that depend on ServiceComposer.AspNetCore:

Package	Downloads
ServiceComposer.AspNetCore.Mvc Services ViewModel Composition for Asp.Net Core Mvc	8.3K

GitHub repositories (2)

Showing the top 2 popular GitHub repositories that depend on ServiceComposer.AspNetCore:

Repository	Stars
Particular/Workshop SOA Done Right	590
mauroservienti/all-our-aggregates-are-wrong-demos A microservices powered e-commerce shopping cart sample - based on SOA principles. Demos and sample for my "All our Aggregates are Wrong" talk	236