var app = builder.Build();
await app.Services.WarmUpAsync();
Population service
You can use the population service to create a list of random value of a specific Type.
An example from unit test explains how to use the service.
IServiceCollection services = new ServiceCollection();
services.AddPopulationService();
var serviceProvider = services.BuildServiceProvider().CreateScope().ServiceProvider;
var populatedModel = serviceProvider.GetService<IPopulation<PopulationModelTest>>();
IPopulation<PopulationModelTest> allPrepopulation = populatedModel!
.Setup()
.WithPattern(x => x.J!.First().A, "[a-z]{4,5}")
.WithPattern(x => x.Y!.First().Value.A, "[a-z]{4,5}")
.WithImplementation(x => x.I, typeof(MyInnerInterfaceImplementation))
.WithPattern(x => x.I!.A!, "[a-z]{4,5}")
.WithPattern(x => x.II!.A!, "[a-z]{4,5}")
.WithImplementation<IInnerInterface, MyInnerInterfaceImplementation>(x => x.I!);
var all = allPrepopulation.Populate();
Abstract factory
You can use this abstract factory solution when you need to setup more than one service of the same kind
and you need to distinguish them by a name.
I have an interface
public interface IMyService
{
string GetName();
}
Some options for every service
public class SingletonOption
{
public string ServiceName { get; set; }
}
public class TransientOption
{
public string ServiceName { get; set; }
}
public class ScopedOption
{
public string ServiceName { get; set; }
}
with built options which is a IServiceOptions, a options class that ends up with another class. Used for example when you have to add a settings like a connection string but you want to use a service like a client that uses that connection string.
public class BuiltScopedOptions : IServiceOptions<ScopedOption>
{
public string ServiceName { get; set; }
public Task<Func<ScopedOption>> BuildAsync()
{
return Task.FromResult(() => new ScopedOption
{
ServiceName = ServiceName
});
}
}
And six different services
public class SingletonService : IMyService, IServiceWithOptions<SingletonOption>
{
public SingletonOption Options { get; set; }
public string Id { get; } = Guid.NewGuid().ToString();
public string GetName()
{
return $"{Options.ServiceName} with id {Id}";
}
}
public class TransientService : IMyService, IServiceWithOptions<TransientOption>
{
public TransientOption Options { get; set; }
public string Id { get; } = Guid.NewGuid().ToString();
public string GetName()
{
return $"{Options.ServiceName} with id {Id}";
}
}
public class ScopedService : IMyService, IServiceWithOptions<ScopedOption>
{
public ScopedOption Options { get; set; }
public string Id { get; } = Guid.NewGuid().ToString();
public string GetName()
{
return $"{Options.ServiceName} with id {Id}";
}
}
public class ScopedService2 : IMyService, IServiceWithOptions<ScopedOption>
{
public ScopedOption Options { get; set; }
public string Id { get; } = Guid.NewGuid().ToString();
public string GetName()
{
return $"{Options.ServiceName} with id {Id}";
}
}
public class ScopedService3 : IMyService, IServiceWithOptions<ScopedOption>
{
public ScopedOption Options { get; set; }
public string Id { get; } = Guid.NewGuid().ToString();
public string GetName()
{
return $"{Options.ServiceName} with id {Id}";
}
}
public class ScopedService4 : IMyService, IServiceWithOptions<ScopedOption>
{
public ScopedOption Options { get; set; }
public string Id { get; } = Guid.NewGuid().ToString();
public string GetName()
{
return $"{Options.ServiceName} with id {Id}";
}
}
var serviceProvider = services.BuildServiceProvider().CreateScope().ServiceProvider;
var factory = serviceProvider.GetService<IFactory<IMyService>>()!;
var factory2 = serviceProvider.GetService<IFactory<IMyService>>()!;
var singletonFromFactory = factory.Create("singleton").Id;
var singletonFromFactory2 = factory2.Create("singleton").Id;
var transientFromFactory = factory.Create("transient").Id;
var transientFromFactory2 = factory2.Create("transient").Id;
var scopedFromFactory = factory.Create("scoped").Id;
var scopedFromFactory2 = factory2.Create("scoped").Id;
var scoped2FromFactory = factory.Create("scoped2").Id;
var scoped2FromFactory2 = factory2.Create("scoped2").Id;
var scoped3FromFactory = factory.Create("scoped3").Id;
var scoped3FromFactory2 = factory2.Create("scoped3").Id;
var scoped3_2FromFactory = factory.Create("scoped3_2").Id;
var scoped3_2FromFactory2 = factory2.Create("scoped3_2").Id;
var scoped4FromFactory = factory.Create("scoped4").Id;
var scoped4FromFactory2 = factory2.Create("scoped4").Id;
Assert.Equal(singletonFromFactory, singletonFromFactory2);
Assert.NotEqual(transientFromFactory, transientFromFactory2);
Assert.Equal(scopedFromFactory, scopedFromFactory2);
Assert.Equal(scoped2FromFactory, scoped2FromFactory2);
Assert.NotEqual(scoped3FromFactory, scoped3FromFactory2);
Assert.NotEqual(scoped3_2FromFactory, scoped3_2FromFactory2);
Assert.NotEqual(scoped4FromFactory, scoped4FromFactory2);
Decorator
You may add a decoration for your services, based on the abstract factory integration.
The decorator service replaces the previous version and receives it during the injection.
var decorator = provider.GetRequiredService<ITestWithoutFactoryService>();
var previousService = provider.GetRequiredService<IDecoratedService<ITestWithoutFactoryService>>();
In decorator you may find the previousService in the method SetDecoratedService which runs in injection
public class TestWithoutFactoryServiceDecorator : ITestWithoutFactoryService, IDecoratorService<ITestWithoutFactoryService>
{
public string Id { get; } = Guid.NewGuid().ToString();
public ITestWithoutFactoryService Test { get; private set; }
public void SetDecoratedService(ITestWithoutFactoryService service)
{
Test = service;
}
public void SetFactoryName(string name)
{
return;
}
}
Decorator with Abstract Factory integration
You may add a decoration only for one service of your factory integration.
var decoratorFactory = provider.GetRequiredService<IFactory<ITestService>>();
var decorator = decoratorFactory.Create(factoryName);
var previousService = decoratorFactory.CreateWithoutDecoration(factoryName);
Factory Fallback
You may add a fallback for your factory integration. The fallback service is called when the factory service key is not found.
You may scan your assemblies in search of types you need to add to dependency injection.
For instance I have an interface IAnything and I need to add all classes which implements it.
public interface IAnything
{
}
internal class ScanModels : IAnything
{
}