public ChangeFeedIteratorCore( ContainerInternal container, ChangeFeedRequestOptions changeFeedRequestOptions) { this.container = container ?? throw new ArgumentNullException(nameof(container)); this.clientContext = container.ClientContext; this.changeFeedOptions = changeFeedRequestOptions ?? new ChangeFeedRequestOptions(); this.lazyContainerRid = new AsyncLazy <TryCatch <string> >(valueFactory: (innerCancellationToken) => { return(this.TryInitializeContainerRIdAsync(innerCancellationToken)); }); this.hasMoreResults = true; if (this.changeFeedOptions?.From is ChangeFeedRequestOptions.StartFromContinuation startFromContinuation) { if (!FeedRangeContinuation.TryParse(startFromContinuation.Continuation, out FeedRangeContinuation feedRangeContinuation)) { throw new ArgumentException(string.Format(ClientResources.FeedToken_UnknownFormat, startFromContinuation.Continuation)); } this.FeedRangeContinuation = feedRangeContinuation; this.changeFeedOptions.FeedRange = feedRangeContinuation.GetFeedRange(); string continuationToken = feedRangeContinuation.GetContinuation(); if (continuationToken != null) { this.changeFeedOptions.From = ChangeFeedRequestOptions.StartFrom.CreateFromContinuation(continuationToken); } else { this.changeFeedOptions.From = ChangeFeedRequestOptions.StartFrom.CreateFromBeginning(); } } }
public ReadFeedIteratorCore( IDocumentContainer documentContainer, QueryRequestOptions queryRequestOptions, string continuationToken, int pageSize, CancellationToken cancellationToken) { if (!string.IsNullOrEmpty(continuationToken)) { bool isNewArrayFormat = (continuationToken.Length >= 2) && (continuationToken[0] == '[') && (continuationToken[continuationToken.Length - 1] == ']'); if (!isNewArrayFormat) { // One of the two older formats if (!FeedRangeContinuation.TryParse(continuationToken, out FeedRangeContinuation feedRangeContinuation)) { // Backward compatible with old format feedRangeContinuation = new FeedRangeCompositeContinuation( containerRid: string.Empty, FeedRangeEpk.FullRange, new List <Documents.Routing.Range <string> >() { new Documents.Routing.Range <string>( Documents.Routing.PartitionKeyInternal.MinimumInclusiveEffectivePartitionKey, Documents.Routing.PartitionKeyInternal.MaximumExclusiveEffectivePartitionKey, isMinInclusive: true, isMaxInclusive: false) }, continuationToken); } // need to massage it a little string oldContinuationFormat = feedRangeContinuation.ToString(); CosmosObject cosmosObject = CosmosObject.Parse(oldContinuationFormat); CosmosArray continuations = (CosmosArray)cosmosObject["Continuation"]; List <CosmosElement> readFeedContinuationTokens = new List <CosmosElement>(); foreach (CosmosElement continuation in continuations) { CosmosObject continuationObject = (CosmosObject)continuation; CosmosObject rangeObject = (CosmosObject)continuationObject["range"]; string min = ((CosmosString)rangeObject["min"]).Value; string max = ((CosmosString)rangeObject["max"]).Value; CosmosElement token = CosmosElement.Parse(((CosmosString)continuationObject["token"]).Value); FeedRangeInternal feedRange = new FeedRangeEpk(new Documents.Routing.Range <string>(min, max, isMinInclusive: true, isMaxInclusive: false)); ReadFeedState state = new ReadFeedState(token); ReadFeedContinuationToken readFeedContinuationToken = new ReadFeedContinuationToken(feedRange, state); readFeedContinuationTokens.Add(ReadFeedContinuationToken.ToCosmosElement(readFeedContinuationToken)); } CosmosArray cosmosArrayContinuationTokens = CosmosArray.Create(readFeedContinuationTokens); continuationToken = cosmosArrayContinuationTokens.ToString(); } } this.monadicEnumerator = CrossPartitionReadFeedAsyncEnumerator.MonadicCreate( documentContainer, queryRequestOptions, continuationToken: continuationToken, pageSize, cancellationToken); this.hasMoreResults = true; }