How do I get a reference to an IHostedService via Dependency Injection in ASP.NET Core?

Current workaround from mentioned git page:

services.AddSingleton<YourServiceType>();
services.AddSingleton<IHostedService>(p => p.GetService<YourServiceType>());

This creates your service as hosted (runs and stops at host's start and shutdown), as well as gets injected as depedency wherever you require it to be.

There has been some discussion around this topic. For example, see: https://github.com/aspnet/Hosting/issues/1489. One of the problems that you'll run into is that hosted services are added as transient services (from ASP.NET Core 2.1+), meaning that resolving an hosted service from the dependency injection container will result in a new instance each time.

The general advice is to encapsulate any business logic that you want to share with or interact from other services into a specific service. Looking at your code I suggest you implement the business logic in the AbstractProcessQueue<AbstractImportProcess> class and make executing the business logic the only concern of AbstractBackgroundProcessService<T>.