/// <inheritdoc/>
public void OnSubscribe(ISubscription s)
{
subscriptions++;
if (SubscriptionHelper.SetOnce(ref this.s, s))
{
var qs = s as IQueueSubscription <T>;
this.qs = qs;
if (qs != null)
{
if (requestFusionMode != FuseableHelper.NONE)
{
int m = qs.RequestFusion(requestFusionMode);
establishedFusionMode = m;
if (m == FuseableHelper.SYNC)
{
try
{
try
{
T v;
while (qs.Poll(out v))
{
values.Add(v);
}
completions++;
Volatile.Write(ref valueCount, values.Count);
Volatile.Write(ref lastTimestamp, DateTimeOffset.UtcNow.UtcMillis());
}
catch (Exception ex)
{
errors.Add(ex);
}
}
finally
{
cde.Signal();
}
return;
}
}
}
long r = Interlocked.Exchange(ref requested, 0L);
if (r != 0L)
{
s.Request(r);
}
}
}