public void Subscribe(string subscription, Action<object> response)
{
var observer = new Observer() { Subscription = subscription, Respond = response };
MessageBus.Instance.Subscribe(subscription, response);
List<Observer> observers = null;
var observersFound = _observerList.TryGetValue(subscription, out observers);
if (!observersFound)
{
observers = new List<Observer>() { observer };
_observerList.Add(subscription, observers);
}
else
{
observers.Add(observer);
}
}
private void Subscribe(string subscription, Action<object> response, Dictionary<string, List<Observer>> observers)
{
Debug.Assert(_publishingCount >= 0);
var observer = new Observer() { Subscription = subscription, Respond = response };
if (_publishingCount == 0)
{
Add(subscription, observers, observer);
}
else
{
Add(subscription, _waitingSubscribers, observer);
}
}
private static void Add(string subscription, Dictionary<string, List<Observer>> observers, Observer observer)
{
List<Observer> foundObservers = null;
var observersExist = observers.TryGetValue(subscription, out foundObservers);
if (observersExist)
{
foundObservers.Add(observer);
}
else
{
foundObservers = new List<Observer>() { observer };
observers.Add(subscription, foundObservers);
}
}