Call a hub method from a controller's action

How can I call a hub method from a controller's action? What is the correct way of doing this?

Someone used this in a post:

DefaultHubManager hd = new DefaultHubManager(GlobalHost.DependencyResolver);
var hub = hd.ResolveHub("AdminHub") as AdminHub;
hub.SendMessage("woohoo");

But for me, that is throwing:

Using a Hub instance not created by the HubPipeline is unsupported.

I've read also that you can create a hub context, but I don't want to give the responsability to the action, that is, the action doing stuff like:

hubContext.Client(...).someJsMethod(..)