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);
}
