private MessengerSubscriptionToken SubscribeInternal <TMessage>(Action <TMessage> deliveryAction, IActionRunner actionRunner, MessengerReference reference, string tag)
where TMessage : MessengerMessage
{
if (deliveryAction == null)
{
throw new ArgumentNullException(nameof(deliveryAction));
}
BaseSubscription subscription;
switch (reference)
{
case MessengerReference.Strong:
subscription = new StrongSubscription <TMessage>(actionRunner, deliveryAction, tag);
break;
case MessengerReference.Weak:
subscription = new WeakSubscription <TMessage>(actionRunner, deliveryAction, tag);
break;
default:
throw new ArgumentOutOfRangeException(nameof(reference), "reference type unexpected " + reference);
}
lock (this)
{
Dictionary <Guid, BaseSubscription> messageSubscriptions;
if (!_subscriptions.TryGetValue(typeof(TMessage), out messageSubscriptions))
{
messageSubscriptions = new Dictionary <Guid, BaseSubscription>();
_subscriptions[typeof(TMessage)] = messageSubscriptions;
}
//Console.WriteLine("Adding subscription {0} for {1}", subscription.Id, typeof(TMessage).Name);
messageSubscriptions[subscription.Id] = subscription;
PublishSubscriberChangeMessage <TMessage>(messageSubscriptions);
}
return(new MessengerSubscriptionToken(
subscription.Id,
() => InternalUnsubscribe <TMessage>(subscription.Id),
deliveryAction));
}
public MessengerSubscriptionToken SubscribeOnThreadPoolThread <TMessage>(Action <TMessage> deliveryAction, MessengerReference reference = MessengerReference.Weak, string tag = null)
where TMessage : MessengerMessage
{
return(SubscribeInternal(deliveryAction, new ThreadPoolActionRunner(), reference, tag));
}
