public async Task <string> AddSubscriptionObserverAsync(string subscriptionUriString, TimeSpan lifetime,
ErrorObserver observer)
{
IErrorObserver observerRef = await client.CreateObjectReference <IErrorObserver>(observer);
ISubscription subscription = GetSubscription(subscriptionUriString);
return(await subscription.AddObserverAsync(lifetime, observerRef));
}
public async Task <string> AddResourceObserverAsync(string resourceUriString, TimeSpan lifetime,
ErrorObserver observer)
{
IErrorObserver objRef = await client.CreateObjectReference <IErrorObserver>(observer);
IPiSystem resource = GetPiSystem(resourceUriString);
return(await resource.AddObserverAsync(lifetime, objRef));
}