public override void Visit(ChangeFeedStartFromTime startFromTime)
{
// Our current public contract for ChangeFeedProcessor uses DateTime.MinValue.ToUniversalTime as beginning.
// We need to add a special case here, otherwise it would send it as normal StartTime.
// The problem is Multi master accounts do not support StartTime header on ReadFeed, and thus,
// it would break multi master Change Feed Processor users using Start From Beginning semantics.
// It's also an optimization, since the backend won't have to binary search for the value.
if (startFromTime.StartTime != ChangeFeedStartFromRequestOptionPopulator.StartFromBeginningTime)
{
this.requestMessage.Headers.Add(
HttpConstants.HttpHeaders.IfModifiedSince,
startFromTime.StartTime.ToString("r", CultureInfo.InvariantCulture));
}
}
public override TryCatch <ChangeFeedCrossFeedRangeState> Visit(ChangeFeedStartFromTime startFromTime)
{
return(TryCatch <ChangeFeedCrossFeedRangeState> .FromResult(
ChangeFeedCrossFeedRangeState.CreateFromTime(startFromTime.StartTime, startFromTime.FeedRange)));
}
public abstract Task <TResult> VisitAsync(
ChangeFeedStartFromTime startFromTime,
TInput input,
CancellationToken cancellationToken);
public override FeedRange Visit(ChangeFeedStartFromTime startFromTime) => startFromTime.FeedRange;
public override FeedRange Visit(ChangeFeedStartFromTime startFromTime)
{
return(startFromTime.FeedRange);
}