/// <summary>
/// Processes the hub's incoming method calls.
/// </summary>
protected override Task OnReceived(HttpRequest request, string connectionId, string data)
{
HubRequest hubRequest = _requestParser.Parse(data, _serializer);
// Create the hub
HubDescriptor descriptor = _manager.EnsureHub(hubRequest.Hub,
_counters.ErrorsHubInvocationTotal,
_counters.ErrorsHubInvocationPerSec,
_counters.ErrorsAllTotal,
_counters.ErrorsAllPerSec);
IJsonValue[] parameterValues = hubRequest.ParameterValues;
// Resolve the method
MethodDescriptor methodDescriptor = _manager.GetHubMethod(descriptor.Name, hubRequest.Method, parameterValues);
if (methodDescriptor == null)
{
// Empty (noop) method descriptor
// Use: Forces the hub pipeline module to throw an error. This error is encapsulated in the HubDispatcher.
// Encapsulating it in the HubDispatcher prevents the error from bubbling up to the transport level.
// Specifically this allows us to return a faulted task (call .fail on client) and to not cause the
// transport to unintentionally fail.
IEnumerable <MethodDescriptor> availableMethods = _manager.GetHubMethods(descriptor.Name, m => m.Name == hubRequest.Method);
methodDescriptor = new NullMethodDescriptor(descriptor, hubRequest.Method, availableMethods);
}
// Resolving the actual state object
var tracker = new StateChangeTracker(hubRequest.State);
var hub = CreateHub(request, descriptor, connectionId, tracker, throwIfFailedToCreate: true);
return(InvokeHubPipeline(hub, parameterValues, methodDescriptor, hubRequest, tracker)
.ContinueWithPreservedCulture(task => hub.Dispose(), TaskContinuationOptions.ExecuteSynchronously));
}
