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feat: Add OpenFeature.Extensions.Hosting package
See: open-feature/dotnet-sdk-contrib#127 Signed-off-by: Austin Drenski <[email protected]>
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36 changes: 36 additions & 0 deletions
36
src/OpenFeature.Extensions.Hosting/Internal/OpenFeatureHostedService.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| using System.Collections.Generic; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using Microsoft.Extensions.Hosting; | ||
|
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| namespace OpenFeature.Internal; | ||
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| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| public sealed class OpenFeatureHostedService(Api api, IEnumerable<FeatureProvider> providers) : IHostedLifecycleService | ||
| { | ||
| readonly Api _api = Check.NotNull(api); | ||
| readonly IEnumerable<FeatureProvider> _providers = Check.NotNull(providers); | ||
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| async Task IHostedLifecycleService.StartingAsync(CancellationToken cancellationToken) | ||
| { | ||
| foreach (var provider in this._providers) | ||
| { | ||
| await this._api.SetProvider(provider.GetMetadata().Name, provider).ConfigureAwait(false); | ||
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| if (this._api.GetProviderMetadata() is {Name: "No-op Provider"}) | ||
| await this._api.SetProvider(provider).ConfigureAwait(false); | ||
| } | ||
| } | ||
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| Task IHostedService.StartAsync(CancellationToken cancellationToken) => Task.CompletedTask; | ||
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| Task IHostedLifecycleService.StartedAsync(CancellationToken cancellationToken) => Task.CompletedTask; | ||
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| Task IHostedLifecycleService.StoppingAsync(CancellationToken cancellationToken) => Task.CompletedTask; | ||
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| Task IHostedService.StopAsync(CancellationToken cancellationToken) => Task.CompletedTask; | ||
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| Task IHostedLifecycleService.StoppedAsync(CancellationToken cancellationToken) => this._api.Shutdown(); | ||
| } |
26 changes: 26 additions & 0 deletions
26
src/OpenFeature.Extensions.Hosting/OpenFeature.Extensions.Hosting.csproj
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <LangVersion>latest</LangVersion> | ||
| <Nullable>enable</Nullable> | ||
| <TargetFrameworks>netstandard2.0;net6.0;net7.0;net8.0;net462</TargetFrameworks> | ||
| </PropertyGroup> | ||
|
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| <PropertyGroup> | ||
| <PackageReadmeFile>README.md</PackageReadmeFile> | ||
| <RootNamespace>OpenFeature</RootNamespace> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <None Include="../../README.md" Pack="true" PackagePath="/" /> | ||
| </ItemGroup> | ||
|
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| <ItemGroup> | ||
| <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="$(MicrosoftExtensionsHostingAbstractionsVer)" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="../OpenFeature/OpenFeature.csproj" /> | ||
| </ItemGroup> | ||
|
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| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| using Microsoft.Extensions.DependencyInjection; | ||
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| namespace OpenFeature; | ||
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| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| /// <param name="Services"></param> | ||
| public sealed record OpenFeatureBuilder(IServiceCollection Services); |
145 changes: 145 additions & 0 deletions
145
src/OpenFeature.Extensions.Hosting/OpenFeatureBuilderExtensions.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| using System; | ||
| using Microsoft.Extensions.DependencyInjection; | ||
| using Microsoft.Extensions.DependencyInjection.Extensions; | ||
| using Microsoft.Extensions.Logging; | ||
| using OpenFeature.Internal; | ||
| using OpenFeature.Model; | ||
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| namespace OpenFeature; | ||
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| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| public static class OpenFeatureBuilderExtensions | ||
| { | ||
| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| /// <param name="builder"></param> | ||
| /// <param name="configure"></param> | ||
| /// <returns> | ||
| /// | ||
| /// </returns> | ||
| public static OpenFeatureBuilder AddEvaluationContext( | ||
| this OpenFeatureBuilder builder, | ||
| Action<EvaluationContextBuilder> configure) | ||
| { | ||
| Check.NotNull(builder); | ||
| Check.NotNull(configure); | ||
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| AddEvaluationContext(builder, null, (b, _, _) => configure(b)); | ||
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| return builder; | ||
| } | ||
|
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| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| /// <param name="builder"></param> | ||
| /// <param name="configure"></param> | ||
| /// <returns> | ||
| /// | ||
| /// </returns> | ||
| public static OpenFeatureBuilder AddEvaluationContext( | ||
| this OpenFeatureBuilder builder, | ||
| Action<EvaluationContextBuilder, IServiceProvider> configure) | ||
| { | ||
| Check.NotNull(builder); | ||
| Check.NotNull(configure); | ||
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| AddEvaluationContext(builder, null, (b, _, s) => configure(b, s)); | ||
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| return builder; | ||
| } | ||
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| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| /// <param name="builder"></param> | ||
| /// <param name="providerName"></param> | ||
| /// <param name="configure"></param> | ||
| /// <returns> | ||
| /// | ||
| /// </returns> | ||
| public static OpenFeatureBuilder AddEvaluationContext( | ||
| this OpenFeatureBuilder builder, | ||
| string? providerName, | ||
| Action<EvaluationContextBuilder, string?, IServiceProvider> configure) | ||
| { | ||
| Check.NotNull(builder); | ||
| Check.NotNull(configure); | ||
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| builder.Services.AddKeyedSingleton(providerName, (services, key) => | ||
| { | ||
| var b = EvaluationContext.Builder(); | ||
| configure(b, key as string, services); | ||
| return b.Build(); | ||
| }); | ||
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| return builder; | ||
| } | ||
|
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| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| /// <param name="builder"></param> | ||
| /// <param name="providerName"></param> | ||
| public static void TryAddOpenFeatureClient(this OpenFeatureBuilder builder, string? providerName = null) | ||
| { | ||
| Check.NotNull(builder); | ||
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| builder.Services.AddHostedService<OpenFeatureHostedService>(); | ||
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| builder.Services.TryAddKeyedSingleton(providerName, static (services, providerName) => | ||
| { | ||
| var api = providerName switch | ||
| { | ||
| null => Api.Instance, | ||
| not null => services.GetRequiredKeyedService<Api>(null) | ||
| }; | ||
| api.AddHooks(services.GetKeyedServices<Hook>(providerName)); | ||
| api.SetContext(services.GetRequiredKeyedService<EvaluationContextBuilder>(providerName).Build()); | ||
| return api; | ||
| }); | ||
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| builder.Services.TryAddKeyedSingleton<ILogger>(providerName, static (services, providerName) => providerName switch | ||
| { | ||
| null => services.GetRequiredService<ILogger<FeatureClient>>(), | ||
| not null => services.GetRequiredService<ILoggerFactory>().CreateLogger($"OpenFeature.FeatureClient.{providerName}") | ||
| }); | ||
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| builder.Services.TryAddKeyedTransient<EvaluationContextBuilder>(providerName, static (services, providerName) => | ||
| { | ||
| var builder = providerName switch | ||
| { | ||
| null => EvaluationContext.Builder(), | ||
| not null => services.GetRequiredKeyedService<EvaluationContextBuilder>(null) | ||
| }; | ||
| foreach (var c in services.GetKeyedServices<EvaluationContext>(providerName)) | ||
| { | ||
| builder.Merge(c); | ||
| } | ||
| return builder; | ||
| }); | ||
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| builder.Services.TryAddKeyedTransient<IFeatureClient>(providerName, static (services, providerName) => | ||
| { | ||
| var api = services.GetRequiredService<Api>(); | ||
| return api.GetClient( | ||
| api.GetProviderMetadata(providerName as string).Name, | ||
| null, | ||
| services.GetRequiredKeyedService<ILogger>(providerName), | ||
| services.GetRequiredKeyedService<EvaluationContextBuilder>(providerName).Build()); | ||
| }); | ||
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| if (providerName is not null) | ||
| builder.Services.Replace(ServiceDescriptor.Transient(services => services.GetRequiredKeyedService<IFeatureClient>(providerName))); | ||
| } | ||
| } |
44 changes: 44 additions & 0 deletions
44
src/OpenFeature.Extensions.Hosting/OpenFeatureServiceCollectionExtensions.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| using System; | ||
| using OpenFeature; | ||
|
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| #pragma warning disable IDE0130 // Namespace does not match folder structure | ||
| // ReSharper disable once CheckNamespace | ||
| namespace Microsoft.Extensions.DependencyInjection; | ||
|
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| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| public static class OpenFeatureServiceCollectionExtensions | ||
| { | ||
| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| /// <param name="services"></param> | ||
| /// <param name="configure"></param> | ||
| /// <returns></returns> | ||
| public static IServiceCollection AddOpenFeature(this IServiceCollection services, Action<OpenFeatureBuilder> configure) | ||
| { | ||
| Check.NotNull(services); | ||
| Check.NotNull(configure); | ||
|
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| configure(AddOpenFeature(services)); | ||
|
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| return services; | ||
| } | ||
|
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| /// <summary> | ||
| /// | ||
| /// </summary> | ||
| /// <param name="services"></param> | ||
| /// <returns></returns> | ||
| public static OpenFeatureBuilder AddOpenFeature(this IServiceCollection services) | ||
| { | ||
| Check.NotNull(services); | ||
|
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| var builder = new OpenFeatureBuilder(services); | ||
|
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| builder.TryAddOpenFeatureClient(); | ||
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| return builder; | ||
| } | ||
| } |
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