private async Task <bool> ReadEventsCallbackAsync(StreamEventsSlice slice, long?lastEventNumber)
{
bool flag1 = ShouldStop;
if (!flag1)
{
flag1 = await ProcessEventsAsync(lastEventNumber, slice).ConfigureAwait(false);
}
bool flag2 = flag1;
if (flag2 && Verbose)
{
Log.Debug("Catch-up Subscription {0} to {1}: finished reading events, nextReadEventNumber = {2}.", (object)SubscriptionName, IsSubscribedToAll ? (object)"<all>" : (object)StreamId, (object)_nextReadEventNumber);
}
return(flag2);
}
private async Task <bool> ProcessEventsAsync(long?lastEventNumber, StreamEventsSlice slice)
{
bool done;
switch (slice)
{
case StreamDeletedSlice _:
throw new StreamDeletedException(new StreamName(StreamId));
case StreamNotFoundSlice _:
if (lastEventNumber == -1)
{
throw new Exception(
$"Impossible: stream {StreamId} disappeared in the middle of catching up subscription {SubscriptionName}.");
}
done = true;
break;
case StreamEventsSlice _:
RecordedEvent[] resolvedEventArray = slice.Events;
for (int index = 0; index < resolvedEventArray.Length; ++index)
{
await TryProcessAsync(resolvedEventArray[index]).ConfigureAwait(false);
}
_nextReadEventNumber = slice.NextEventNumber;
if (lastEventNumber.HasValue)
{
done = slice.NextEventNumber > lastEventNumber.Value;
}
else
{
done = slice.IsEndOfStream;
}
break;
default:
throw new ArgumentOutOfRangeException(string.Format($"Subscription {SubscriptionName} unexpected StreamEventsSlice.Status."));
}
if (!done && slice.IsEndOfStream)
{
Thread.Sleep(1);
}
return(done);
}
