private void RegisterToCallStateChangeEvent(string callConnectionId)
{
callEstablishedTask = new TaskCompletionSource <bool>(TaskContinuationOptions.RunContinuationsAsynchronously);
reportCancellationToken.Register(() => callEstablishedTask.TrySetCanceled());
callTerminatedTask = new TaskCompletionSource <bool>(TaskContinuationOptions.RunContinuationsAsynchronously);
//Set the callback method
var callStateChangeNotificaiton = new NotificationCallback((CallingServerEventBase callEvent) =>
{
var callStateChanged = (CallConnectionStateChangedEvent)callEvent;
Logger.LogMessage(Logger.MessageType.INFORMATION, $"Call State changed to: {callStateChanged.CallConnectionState}");
if (callStateChanged.CallConnectionState == CallConnectionState.Connected)
{
callEstablishedTask.TrySetResult(true);
}
else if (callStateChanged.CallConnectionState == CallConnectionState.Disconnected)
{
EventDispatcher.Instance.Unsubscribe(CallingServerEventType.CallConnectionStateChangedEvent.ToString(), callConnectionId);
reportCancellationTokenSource.Cancel();
callTerminatedTask.SetResult(true);
}
});
//Subscribe to the event
var eventId = EventDispatcher.Instance.Subscribe(CallingServerEventType.CallConnectionStateChangedEvent.ToString(), callConnectionId, callStateChangeNotificaiton);
}
public bool Subscribe(string eventType, string eventKey, NotificationCallback notificationCallback)
{
string eventId = BuildEventKey(eventType, eventKey);
return(notificationCallbacks.TryAdd(eventId, notificationCallback));
}