/// <summary>
/// Creates an observer from a notification callback.
/// </summary>
/// <param name="handler">Action that handles a notification.</param>
/// <returns>The observer object that invokes the specified handler using a notification corresponding to each message it receives.</returns>
public static IObserver <T> ToObserver <T>(this Action <Notification <T> > handler)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
return(new AnonymousObserver <T>(
x => handler(Notification.CreateOnNext <T>(x)),
exception => handler(Notification.CreateOnError <T>(exception)),
() => handler(Notification.CreateOnCompleted <T>())));
}
internal void OnCompleted()
{
if (!stopped)
{
elements.Add(Notification.CreateOnCompleted <T>());
Terminated();
// Calling OnCompleted can modify the collection so we must iterate a copy.
var currentSubscriptions = subscriptions.ToArray();
foreach (var subscription in currentSubscriptions)
{
Contract.Assume(subscription != null);
var observer = subscription.Observer;
subscription.Dispose();
observer.OnCompleted();
}
}
}
public void OnCompleted()
{
yield(Notification.CreateOnCompleted <T>());
dispose();
}
public void OnCompleted()
{
handler(Notification.CreateOnCompleted <T> ());
}
