protected virtual void OnSubscribe(ISubscription subscription)
{
if (subscription == null)
{
throw new ArgumentException("OnSubscribe require subscription not to be null");
}
if (_isUpstreamCompleted)
{
subscription.Cancel();
}
else
{
_upstream = subscription;
// prefetch
_upstream.Request(_inputBuffer.Length);
SubReceive.Become(UpstreamRunning);
}
Pump.GotUpstreamSubscription();
}
