SignalR Hub resolve

[tyma...@gmail.com]

Hi,

I'm moving my SignalR app to use OWIN hosting and I have a problem I don't know how to solve. I have something like this in the OWIN configuration (simplified):


var builder = new ContainerBuilder();
//...

builder.RegisterHubs(typeof(MessageHub).Assembly)
.ExternallyOwned()
.PropertiesAutowired();

//..

var container = builder.Build();
var hubConfig = new HubConfiguration();
hubConfig.Resolver = new AutofacDependencyResolver(container);

app.MapSignalR("/signalr", hubConfig);


From the client-side, I can connect to the MessageHub and send/receive messages to/from it.

However, in one of my WebApi controllers I have:

public MessageController : ApiController {
public MessageHub Hub { get; set; } // DI

//...

public HttpResponseMessage Post() {
// Do something
Hub.Clients.All.send('done'); // This throws an exception
}
}

My ApiController-s are also properly registered within the same Autofac container (with PropertiesAutoWired) and Hub indeed gets resolved to a MessageHub instance (it's not null). However, its Context is null and trying to send out a message to all the clients like above results in an "Object reference not set to an instance of an object" exception. How do I get a proper MessageHub instance in a controller without using GlobalHost?

[Travis Illig]

Is this question already somewhere on StackOverflow?

For a minute I thought it was here, but this appears to be somewhat different.

Generally usage questions get answered faster on StackOverflow; if you post there, please link back to the question here so we don't end up with duplication/cross-posting.

[Igor Timarac]

Yes, sorry about that. Just after posting a question I realized that it's preferred to use Stackoverflow for that, so I posted question there.

I apologize once again.