44 lines
1.8 KiB
C#
44 lines
1.8 KiB
C#
using Microsoft.Extensions.Hosting;
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namespace Microsoft.Extensions.DependencyInjection
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{
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/// <summary>
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/// Extensions for the <see cref="IServiceCollection"/>.
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/// </summary>
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[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
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public static class ServiceCollectionExtensions
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{
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/// <summary>
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/// Adds a hosted service that is instanciated only once.
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/// </summary>
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/// <typeparam name="TService">The type of the service to add.</typeparam>
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/// <param name="services">The <see cref="IServiceCollection"/> to add the service to.</param>
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/// <returns>A reference to this instance after the operation has completed.</returns>
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public static IServiceCollection AddSingletonHostedService<TService>(this IServiceCollection services)
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where TService : class, IHostedService
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{
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services.AddSingleton<TService>();
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services.AddHostedService(serviceProvider => serviceProvider.GetRequiredService<TService>());
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return services;
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}
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/// <summary>
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/// Adds a hosted service that is instanciated only once.
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/// </summary>
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/// <typeparam name="TService">The type of the service to add.</typeparam>
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/// <typeparam name="TImplementation">The type of the implementation of the service to add.</typeparam>
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/// <param name="services">The <see cref="IServiceCollection"/> to add the service to.</param>
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/// <returns>A reference to this instance after the operation has completed.</returns>
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public static IServiceCollection AddSingletonHostedService<TService, TImplementation>(this IServiceCollection services)
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where TService : class, IHostedService
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where TImplementation : class, TService
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{
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services.AddSingleton<TService, TImplementation>();
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services.AddHostedService(serviceProvider => serviceProvider.GetRequiredService<TService>());
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return services;
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}
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}
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}
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