private TestStreamSubscriptionHandle <T> CreateEmptyStreamHandlerImpl(
Action <IAsyncObserver <T> > onAttachingObserver = null)
{
TestStreamSubscriptionHandle <T> handle = null;
handle = new TestStreamSubscriptionHandle <T>(
Guid,
Namespace,
ProviderName,
observer =>
{
_handlers.Remove(handle);
if (observer != null)
{
_observers.Remove(observer);
}
}, observer =>
{
onAttachingObserver?.Invoke(observer);
_observers.Add(observer);
}, observer =>
{
_observers.Remove(observer);
});
return(handle);
}
public Task <StreamSubscriptionHandle <T> > SubscribeAsync(IAsyncObserver <T> observer)
{
_observers.Add(observer);
var handle = new TestStreamSubscriptionHandle <T>(() => _observers.Remove(observer));
return(Task.FromResult <StreamSubscriptionHandle <T> >(handle));
}
public Task <StreamSubscriptionHandle <T> > SubscribeAsync(IAsyncObserver <T> observer)
{
if (observer == null)
{
throw new ArgumentNullException(nameof(observer));
}
TestStreamSubscriptionHandle <T> handle = null;
handle = new TestStreamSubscriptionHandle <T>(() =>
{
_observers.Remove(observer);
_handlers.Remove(handle);
});
_observers.Add(observer);
_handlers.Add(handle);
return(Task.FromResult <StreamSubscriptionHandle <T> >(handle));
}
