public async ValueTask <bool> MoveNextAsync()
{
this.cancellationToken.ThrowIfCancellationRequested();
if (!await this.crossPartitionEnumerator.MoveNextAsync())
{
this.Current = default;
return(false);
}
TryCatch <CrossPartitionPage <ReadFeedPage, ReadFeedState> > monadicCrossPartitionPage = this.crossPartitionEnumerator.Current;
if (monadicCrossPartitionPage.Failed)
{
this.Current = TryCatch <ReadFeedPage> .FromException(monadicCrossPartitionPage.Exception);
return(true);
}
CrossPartitionPage <ReadFeedPage, ReadFeedState> crossPartitionPage = monadicCrossPartitionPage.Result;
ReadFeedPage backendPage = crossPartitionPage.Page;
CrossPartitionState <ReadFeedState> crossPartitionState = crossPartitionPage.State;
ReadFeedState state;
if (crossPartitionState != null)
{
IReadOnlyList <(FeedRangeInternal, ReadFeedState)> rangesAndStates = crossPartitionState.Value;
List <CosmosElement> changeFeedContinuationTokens = new List <CosmosElement>();
foreach ((FeedRangeInternal range, ReadFeedState readFeedState) in rangesAndStates)
{
this.cancellationToken.ThrowIfCancellationRequested();
ReadFeedContinuationToken readFeedContinuationToken = new ReadFeedContinuationToken(
range,
readFeedState);
CosmosElement cosmosElementChangeFeedContinuationToken = ReadFeedContinuationToken.ToCosmosElement(readFeedContinuationToken);
changeFeedContinuationTokens.Add(cosmosElementChangeFeedContinuationToken);
}
CosmosArray cosmosElementTokens = CosmosArray.Create(changeFeedContinuationTokens);
state = new ReadFeedState(cosmosElementTokens);
}
else
{
state = null;
}
ReadFeedPage compositePage = new ReadFeedPage(backendPage.Content, backendPage.RequestCharge, backendPage.ActivityId, backendPage.Diagnostics, state);
this.Current = TryCatch <ReadFeedPage> .FromResult(compositePage);
return(true);
}
public static CosmosElement ToCosmosElement(ReadFeedContinuationToken readFeedContinuationToken)
{
return(CosmosObject.Create(new Dictionary <string, CosmosElement>()
{
{
PropertyNames.FeedRange,
FeedRangeCosmosElementSerializer.ToCosmosElement(readFeedContinuationToken.Range)
},
{
PropertyNames.State,
readFeedContinuationToken.State.ContinuationToken
}
}));
}
