private static IHubProxy InitializeHubConnection(IReadOnlyConfiguration configuration, Action <string, int?, FunctionTypeEnum, bool, string, Action <string> > handler, out DisposalQueue toDispose, Action <string> logger) { toDispose = new DisposalQueue(); var hubConnection = new HubConnection(configuration["Settings:WebAddress"], new Dictionary <string, string> { { configuration["Settings:SignalREngineFlagName"], true.ToString().ToLowerInvariant() } }); hubConnection.StateChanged += change => logger($"InitializeHubConnection: StateChanged: '{change.OldState}' -> '{change.NewState}'!"); hubConnection.JsonSerializer.Converters.Add(new NullConverter()); // handle NULLs var hubProxy = hubConnection.CreateHubProxy(configuration["Settings:SignalRHubName"]); toDispose.Enqueue(hubProxy.On <string, int?, FunctionTypeEnum, string>("sendMessage", (clientID, moduleID, functionType, text) => handler(clientID, moduleID, functionType, false, text, logger))); toDispose.Enqueue(hubProxy.On <string, int?, FunctionTypeEnum>("sendQuery", (clientID, moduleID, functionType) => handler(clientID, moduleID, functionType, true, null, logger))); try { hubConnection.Start().Wait(); } catch (Exception e) { var message = $"InitializeHubConnection: ERROR:{Environment.NewLine}Exception '{typeof(Exception).Name}' occurred while initializing hub connection: {e.Message}."; if (e.InnerException != null) { message += Environment.NewLine + $"Inner exception '{e.InnerException.GetType().Name}': {e.InnerException.Message}."; } logger(message); toDispose = null; return(null); } logger($"InitializeHubConnection: Connection to hub started with ID '{hubConnection.ConnectionId}'!"); toDispose.Enqueue(hubConnection); return(hubProxy); }
/// <summary> /// Relinquishes ownership of the lookup and adds it to the disposal queue. /// </summary> public void DisposeInBackground() { DisposalQueue.Enqueue(this); }