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Add Mediation Support #33
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9 changes: 9 additions & 0 deletions
9
src/Bss.Platform.Mediation.Abstractions/Bss.Platform.Mediation.Abstractions.csproj
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
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| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| namespace Bss.Platform.Mediation.Abstractions; | ||
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| public interface IMediator | ||
| { | ||
| Task<TResult> Send<TRequest, TResult>(TRequest request, CancellationToken cancellationToken = default) | ||
| where TRequest : IRequest<TResult>; | ||
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| Task Send<TRequest>(TRequest request, CancellationToken cancellationToken = default) | ||
| where TRequest : IRequest; | ||
| } |
17 changes: 17 additions & 0 deletions
17
src/Bss.Platform.Mediation.Abstractions/IPipelineBehavior.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| namespace Bss.Platform.Mediation.Abstractions; | ||
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| public interface IPipelineBehavior<TRequest, TResult> | ||
| { | ||
| Task<TResult> Handle( | ||
| TRequest request, | ||
| CancellationToken ct, | ||
| Func<TRequest, CancellationToken, Task<TResult>> next); | ||
| } | ||
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| public interface IPipelineBehavior<TRequest> | ||
| { | ||
| Task Handle( | ||
| TRequest request, | ||
| CancellationToken ct, | ||
| Func<TRequest, CancellationToken, Task> next); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| namespace Bss.Platform.Mediation.Abstractions; | ||
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| public interface IRequest<out TResult>; | ||
| public interface IRequest; | ||
13 changes: 13 additions & 0 deletions
13
src/Bss.Platform.Mediation.Abstractions/IRequestHandler.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| namespace Bss.Platform.Mediation.Abstractions; | ||
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| public interface IRequestHandler<in TRequest, TResult> | ||
| where TRequest : IRequest<TResult> | ||
| { | ||
| Task<TResult> Handle(TRequest request, CancellationToken cancellationToken); | ||
| } | ||
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| public interface IRequestHandler<in TRequest> | ||
| where TRequest : IRequest | ||
| { | ||
| Task Handle(TRequest request, CancellationToken cancellationToken); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
|
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| <PropertyGroup> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
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| <ItemGroup> | ||
| <ProjectReference Include="..\Bss.Platform.Mediation.Abstractions\Bss.Platform.Mediation.Abstractions.csproj" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <PackageReference Include="Microsoft.Extensions.DependencyInjection" /> | ||
| <PackageReference Include="Scrutor" /> | ||
| </ItemGroup> | ||
|
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| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| using System.Reflection; | ||
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| using Bss.Platform.Mediation.Abstractions; | ||
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| using Microsoft.Extensions.DependencyInjection; | ||
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| namespace Bss.Platform.Mediation; | ||
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| public static class DependencyInjection | ||
| { | ||
| public static IServiceCollection AddMediation( | ||
| this IServiceCollection services, | ||
| params Assembly[] assemblies) | ||
| { | ||
| services.AddScoped<IMediator, Mediator>(); | ||
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| services.Scan(s => s | ||
| .FromAssemblies(assemblies) | ||
| .AddClasses(c => c.AssignableTo(typeof(IRequestHandler<,>))) | ||
| .AsImplementedInterfaces() | ||
| .WithScopedLifetime() | ||
| .AddClasses(c => c.AssignableTo(typeof(IPipelineBehavior<,>))) | ||
| .AsImplementedInterfaces() | ||
| .WithScopedLifetime()); | ||
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| return services; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| using Microsoft.Extensions.DependencyInjection; | ||
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| using Bss.Platform.Mediation.Abstractions; | ||
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| namespace Bss.Platform.Mediation; | ||
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| public record Mediator(IServiceProvider ServiceProvider) : IMediator | ||
| { | ||
| public Task<TResult> Send<TRequest, TResult>(TRequest request, CancellationToken cancellationToken = default) | ||
| where TRequest : IRequest<TResult> | ||
| { | ||
| var handler = this.ServiceProvider.GetRequiredService<IRequestHandler<TRequest, TResult>>(); | ||
| var behaviors = this.GetBehaviors<IPipelineBehavior<TRequest, TResult>>(); | ||
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| Func<TRequest, CancellationToken, Task<TResult>> next = | ||
| (r, ct) => handler.Handle(r, ct); | ||
| foreach (var behavior in behaviors) | ||
| { | ||
| var prev = next; | ||
| next = (r, ct) => behavior.Handle(r, ct, prev); | ||
| } | ||
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| return next(request, cancellationToken); | ||
| } | ||
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| public Task Send<TRequest>(TRequest request, CancellationToken cancellationToken = default) | ||
| where TRequest : IRequest | ||
| { | ||
| var handler = this.ServiceProvider.GetRequiredService<IRequestHandler<TRequest>>(); | ||
| var behaviors = this.GetBehaviors<IPipelineBehavior<TRequest>>(); | ||
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| Func<TRequest, CancellationToken, Task> next = (r, ct) => handler.Handle(r, ct); | ||
| foreach (var behavior in behaviors) | ||
| { | ||
| var prev = next; | ||
| next = (r, ct) => behavior.Handle(r, ct, prev); | ||
| } | ||
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| return next(request, cancellationToken); | ||
| } | ||
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| private TInterface[] GetBehaviors<TInterface>() => | ||
| this.ServiceProvider | ||
| .GetServices<TInterface>() | ||
| .Reverse() | ||
| .ToArray(); | ||
| } |
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