public static TryCatch <CrossPartitionReadFeedAsyncEnumerator> MonadicCreate(
IDocumentContainer documentContainer,
QueryRequestOptions queryRequestOptions,
string continuationToken,
int pageSize,
CancellationToken cancellationToken)
{
if (documentContainer == null)
{
throw new ArgumentNullException(nameof(documentContainer));
}
TryCatch <CrossPartitionState <ReadFeedState> > monadicCrossPartitionState = MonadicParseCrossPartitionState(continuationToken);
if (monadicCrossPartitionState.Failed)
{
return(TryCatch <CrossPartitionReadFeedAsyncEnumerator> .FromException(monadicCrossPartitionState.Exception));
}
RntbdConstants.RntdbEnumerationDirection rntdbEnumerationDirection = RntbdConstants.RntdbEnumerationDirection.Forward;
if ((queryRequestOptions?.Properties != null) && queryRequestOptions.Properties.TryGetValue(HttpConstants.HttpHeaders.EnumerationDirection, out object direction))
{
rntdbEnumerationDirection = (byte)direction == (byte)RntbdConstants.RntdbEnumerationDirection.Reverse ? RntbdConstants.RntdbEnumerationDirection.Reverse : RntbdConstants.RntdbEnumerationDirection.Forward;
}
IComparer <PartitionRangePageAsyncEnumerator <ReadFeedPage, ReadFeedState> > comparer;
if (rntdbEnumerationDirection == RntbdConstants.RntdbEnumerationDirection.Forward)
{
comparer = PartitionRangePageAsyncEnumeratorComparerForward.Singleton;
}
else
{
comparer = PartitionRangePageAsyncEnumeratorComparerReverse.Singleton;
}
CrossPartitionRangePageAsyncEnumerator <ReadFeedPage, ReadFeedState> crossPartitionEnumerator = new CrossPartitionRangePageAsyncEnumerator <ReadFeedPage, ReadFeedState>(
documentContainer,
CrossPartitionReadFeedAsyncEnumerator.MakeCreateFunction(
documentContainer,
queryRequestOptions,
pageSize,
cancellationToken),
comparer: comparer,
maxConcurrency: default,
public static CrossPartitionReadFeedAsyncEnumerator Create(
IDocumentContainer documentContainer,
CrossFeedRangeState <ReadFeedState> crossFeedRangeState,
ReadFeedPaginationOptions readFeedPaginationOptions,
CancellationToken cancellationToken)
{
if (documentContainer == null)
{
throw new ArgumentNullException(nameof(documentContainer));
}
if (crossFeedRangeState == null)
{
throw new ArgumentNullException(nameof(crossFeedRangeState));
}
readFeedPaginationOptions ??= ReadFeedPaginationOptions.Default;
ReadFeedPaginationOptions.PaginationDirection paginationDirection = readFeedPaginationOptions.Direction.GetValueOrDefault(ReadFeedPaginationOptions.PaginationDirection.Forward);
IComparer <PartitionRangePageAsyncEnumerator <ReadFeedPage, ReadFeedState> > comparer;
if (paginationDirection == ReadFeedPaginationOptions.PaginationDirection.Forward)
{
comparer = PartitionRangePageAsyncEnumeratorComparerForward.Singleton;
}
else
{
comparer = PartitionRangePageAsyncEnumeratorComparerReverse.Singleton;
}
CrossPartitionRangePageAsyncEnumerator <ReadFeedPage, ReadFeedState> crossPartitionEnumerator = new CrossPartitionRangePageAsyncEnumerator <ReadFeedPage, ReadFeedState>(
documentContainer,
CrossPartitionReadFeedAsyncEnumerator.MakeCreateFunction(
documentContainer,
readFeedPaginationOptions,
cancellationToken),
comparer: comparer,
maxConcurrency: default,