constructor with parameters in a signalr-core hub

Question

I would like to inject something into my hub.

Basically I am trying to the equivalent of this tutorial https://learn.microsoft.com/en-us/aspnet/signalr/overview/advanced/dependency-injection, but for SignalR-Core. I am mostly interested in the part

public void Configuration(IAppBuilder app)
{
    GlobalHost.DependencyResolver.Register(
        typeof(ChatHub), 
        () => new ChatHub(new ChatMessageRepository()));

    App.MapSignalR();

    // ...
}

How do I do this Net Core and SignalR-Core?

Answer 1

Register your ChatMessageRepository in the DI container with:

services.AddTransient(typeof(ChatMessageRepository), typeof(ChatMessageRepository));

and then inject into your hub in the ctor:

public ChatHub : Hub
{
    private readonly ChatMessageRepository _repository;
    public ChatHub(ChatMessageRepository repository)
    {
        _repository = repository;
    }
    ...
}