/// <summary>
/// Creates a <see cref="IObserver{WorkDoneProgressReport}" /> that will send all of its progress information to the same source.
/// The other side can cancel this, so the <see cref="CancellationToken" /> should be respected.
/// </summary>
public ProgressObserver <WorkDoneProgressReport> Create(WorkDoneProgressBegin begin,
Func <Exception, WorkDoneProgressEnd> onError = null, Func <WorkDoneProgressEnd> onComplete = null,
CancellationToken?cancellationToken = null)
{
if (!_supported)
{
return(ProgressObserver <WorkDoneProgressReport> .Noop);
}
onError ??= error => new WorkDoneProgressEnd()
{
Message = error.ToString()
};
onComplete ??= () => new WorkDoneProgressEnd();
var observer = ProgressObserver.CreateWorkDoneProgress(_router, _serializer, begin, onError, onComplete,
cancellationToken ?? CancellationToken.None);
_activeObservers.TryAdd(observer.ProgressToken, observer);
observer.CancellationToken.Register(() =>
{
if (_activeObservers.TryRemove(observer.ProgressToken, out _))
{
observer.OnCompleted();
}
});
return(observer);
}
/// <summary>
/// Creates a <see cref="IObserver{WorkDoneProgressReport}" /> that will send all of its progress information to the same source.
/// The other side can cancel this, so the <see cref="CancellationToken" /> should be respected.
/// </summary>
public ProgressObserver <T> For <T>(ProgressToken token, CancellationToken?cancellationToken = null)
{
if (!_supported || token == null)
{
return(ProgressObserver <T> .Noop);
}
if (_activeObservers.TryGetValue(token, out var item))
{
return((ProgressObserver <T>)item);
}
var observer = ProgressObserver.Create <T>(token, _router, _serializer, cancellationToken ?? CancellationToken.None);
_activeObservers.TryAdd(token, observer);
observer.CancellationToken.Register(() =>
{
if (_activeObservers.TryRemove(token, out var _))
{
observer.OnCompleted();
}
});
return(observer);
}