/// <summary>
/// Notifies the provider that an observer is to receive notifications.
/// </summary>
/// <returns>
/// A reference to an interface that allows observers to stop receiving notifications before the provider has finished sending them.
/// </returns>
/// <param name="client">The instance of client observable proxy</param>
/// <param name="callback">The callback delegate that is to receive notifications</param>
public static IDisposable Subscribe(this Observer client, Action <Notification> callback)
{
Requires.NotNull(callback, "callback");
return(client.Subscribe(new DelegateObserver(callback)));
}
public static IDisposable Subscribe <T>(this IClientObservable observable, Action <T> callback)
{
Requires.NotNull(callback, nameof(callback));
return(observable.Subscribe(new DelegateObserver(x => callback((T)x))));
}
/// <summary>
/// Subscribe a consumer to this stream reference using strongly-typed delegate.
/// </summary>
/// <typeparam name="T">The type of the items produced by the stream.</typeparam>
/// <param name="callback">Strongly-typed version of callback delegate.</param>
/// <returns>
/// A promise for a StreamSubscription that represents the subscription.
/// The consumer may unsubscribe by using this object.
/// The subscription remains active for as long as it is not explicitely unsubscribed.
/// </returns>
public virtual Task <StreamSubscription> Subscribe <T>(Func <T, Task> callback)
{
Requires.NotNull(callback, nameof(callback));
return(Subscribe(item => callback((T)item)));
}
