private BsonTimestamp GetInitialOperationTimeIfRequired(IChannelHandle channel, IReadBinding binding, ICursorBatchInfo cursorBatchInfo)
{
if (_startAtOperationTime == null && _resumeAfter == null && _startAfter == null)
{
var maxWireVersion = channel.ConnectionDescription.IsMasterResult.MaxWireVersion;
if (maxWireVersion >= 7)
{
if (cursorBatchInfo.PostBatchResumeToken == null && cursorBatchInfo.WasFirstBatchEmpty)
{
return(binding.Session.OperationTime);
}
}
}
return(null);
}
private BsonDocument GetInitialPostBatchResumeTokenIfRequired(ICursorBatchInfo cursorBatchInfo)
{
// If the initial aggregate returns an empty batch, but includes a `postBatchResumeToken`, then we should return that token.
return(cursorBatchInfo.WasFirstBatchEmpty ? cursorBatchInfo.PostBatchResumeToken : null);
}
