Pfthb

I have a generic interface IApiService responsible for making GET calls to other server. I have three requirements:

• some usages have to be cached


• some usages never should be cached


• some usages don't care about caching and should have default setting that can be easily changed

My idea was to introduce the following hierachy:

public interface IApiService<T> where T : class

 Task<T> GetAsync(IRequestParameters requestParameters);



public interface ICachedApiService<T> : IApiService<T> where T : class



public interface IDirectApiService<T> : IApiService<T> where T : class

For case 1 I use ICachedApiService, for case 2 I use IDirectApiService and for case 3 I use IApiService.

I use .NET Core default dependency injection framework. And here's my configuration for ICachedApiService:

serviceCollection.AddScoped(typeof(ICachedApiService<>), typeof(CachedApiService<>);

For IDirectApiService it's different and I have to use lambda method for each generic type

serviceCollection.AddScoped<IDirectApiService<ProductDTO>>(serviceProvider => new 
 DirectApiService<ProductDTO> (
 ProductsEndpoint // and other type specific data
));

The question is how can I configure IApiService to use either IDirectApiService or ICachedApiService?
For ICachedApiService it's easy:

serviceCollection.AddScoped(typeof(IApiService<>), typeof(CachedApiService<>));

For IDirectApiService I would prefer not to repeat the configuration for each concrete type as this is error prone and needs more changes if I want to switch to cached version. Is this possible with any dependency injection framework? Is there a way to somehow get the generic parameter that is missing in getService?

serviceCollection.AddScoped(typeof(IApiService<>), x => x.GetService<???>());