public static CrossPartitionChangeFeedAsyncEnumerator Create(
IDocumentContainer documentContainer,
ChangeFeedMode changeFeedMode,
ChangeFeedRequestOptions changeFeedRequestOptions,
CrossFeedRangeState <ChangeFeedState> state,
CancellationToken cancellationToken)
{
changeFeedRequestOptions ??= new ChangeFeedRequestOptions();
if (documentContainer == null)
{
throw new ArgumentNullException(nameof(documentContainer));
}
if (changeFeedMode == null)
{
throw new ArgumentNullException(nameof(changeFeedMode));
}
CrossPartitionRangePageAsyncEnumerator <ChangeFeedPage, ChangeFeedState> crossPartitionEnumerator = new CrossPartitionRangePageAsyncEnumerator <ChangeFeedPage, ChangeFeedState>(
documentContainer,
CrossPartitionChangeFeedAsyncEnumerator.MakeCreateFunction(
documentContainer,
changeFeedRequestOptions.PageSizeHint.GetValueOrDefault(int.MaxValue),
changeFeedMode,
changeFeedRequestOptions?.JsonSerializationFormatOptions?.JsonSerializationFormat,
cancellationToken),
comparer: default /* this uses a regular queue instead of prioirty queue */,
public async ValueTask <bool> MoveNextAsync()
{
if (!await this.enumerator.MoveNextAsync())
{
return(false);
}
TryCatch <CrossFeedRangePage <Pagination.ReadFeedPage, ReadFeedState> > monadicInnerReadFeedPage = this.enumerator.Current;
if (monadicInnerReadFeedPage.Failed)
{
this.Current = TryCatch <ReadFeedPage> .FromException(monadicInnerReadFeedPage.Exception);
return(true);
}
CrossFeedRangePage <Pagination.ReadFeedPage, ReadFeedState> innerReadFeedPage = monadicInnerReadFeedPage.Result;
CrossFeedRangeState <ReadFeedState> crossFeedRangeState = innerReadFeedPage.State;
ReadFeedCrossFeedRangeState? state = crossFeedRangeState != null ? new ReadFeedCrossFeedRangeState(crossFeedRangeState.Value) : (ReadFeedCrossFeedRangeState?)null;
CosmosArray documents = CosmosQueryClientCore.ParseElementsFromRestStream(
innerReadFeedPage.Page.Content,
Documents.ResourceType.Document,
cosmosSerializationOptions: null);
ReadFeedPage page = new ReadFeedPage(
documents,
innerReadFeedPage.Page.RequestCharge,
innerReadFeedPage.Page.ActivityId,
state);
this.Current = TryCatch <ReadFeedPage> .FromResult(page);
return(true);
}
public async ValueTask <bool> MoveNextAsync()
{
this.cancellationToken.ThrowIfCancellationRequested();
if (!await this.crossPartitionEnumerator.MoveNextAsync())
{
this.Current = default;
return(false);
}
TryCatch <CrossFeedRangePage <ReadFeedPage, ReadFeedState> > monadicCrossPartitionPage = this.crossPartitionEnumerator.Current;
if (monadicCrossPartitionPage.Failed)
{
this.Current = TryCatch <ReadFeedPage> .FromException(monadicCrossPartitionPage.Exception);
return(true);
}
CrossFeedRangePage <ReadFeedPage, ReadFeedState> crossPartitionPage = monadicCrossPartitionPage.Result;
ReadFeedPage backendPage = crossPartitionPage.Page;
CrossFeedRangeState <ReadFeedState> crossPartitionState = crossPartitionPage.State;
ReadFeedState state;
if (crossPartitionState != null)
{
List <CosmosElement> changeFeedContinuationTokens = new List <CosmosElement>();
for (int i = 0; i < crossPartitionState.Value.Length; i++)
{
this.cancellationToken.ThrowIfCancellationRequested();
FeedRangeState <ReadFeedState> feedRangeState = crossPartitionState.Value.Span[i];
ReadFeedContinuationToken readFeedContinuationToken = new ReadFeedContinuationToken(
feedRangeState.FeedRange,
feedRangeState.State);
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 IAsyncEnumerator <TryCatch <ChangeFeedPage> > GetAsyncEnumerator(CancellationToken cancellationToken = default)
{
CrossFeedRangeState <ChangeFeedState> innerState = new CrossFeedRangeState <ChangeFeedState>(this.state.FeedRangeStates);
CrossPartitionChangeFeedAsyncEnumerator innerEnumerator = CrossPartitionChangeFeedAsyncEnumerator.Create(
this.documentContainer,
this.changeFeedRequestOptions,
innerState,
cancellationToken);
return(new ChangeFeedCrossFeedRangeAsyncEnumerator(innerEnumerator));
}
public IAsyncEnumerator <TryCatch <ReadFeedPage> > GetAsyncEnumerator(CancellationToken cancellationToken = default)
{
CrossFeedRangeState <ReadFeedState> innerState = new CrossFeedRangeState <ReadFeedState>(this.state.FeedRangeStates);
CrossPartitionReadFeedAsyncEnumerator innerEnumerator = CrossPartitionReadFeedAsyncEnumerator.Create(
this.documentContainer,
this.requestOptions,
innerState,
this.requestOptions?.MaxItemCount ?? int.MaxValue,
cancellationToken);
return(new ReadFeedCrossFeedRangeAsyncEnumerator(innerEnumerator));
}
public CrossPartitionRangePageAsyncEnumerable(
IFeedRangeProvider feedRangeProvider,
CreatePartitionRangePageAsyncEnumerator <TPage, TState> createPartitionRangeEnumerator,
IComparer <PartitionRangePageAsyncEnumerator <TPage, TState> > comparer,
int maxConcurrency,
ITrace trace,
CrossFeedRangeState <TState> state = default)
{
this.feedRangeProvider = feedRangeProvider ?? throw new ArgumentNullException(nameof(comparer));
this.createPartitionRangeEnumerator = createPartitionRangeEnumerator ?? throw new ArgumentNullException(nameof(createPartitionRangeEnumerator));
this.comparer = comparer ?? throw new ArgumentNullException(nameof(comparer));
this.state = state;
this.maxConcurrency = maxConcurrency < 0 ? throw new ArgumentOutOfRangeException(nameof(maxConcurrency)) : maxConcurrency;
this.trace = trace ?? throw new ArgumentNullException(nameof(trace));
}
public static TryCatch <IQueryPipelineStage> MonadicCreate(
IDocumentContainer documentContainer,
SqlQuerySpec sqlQuerySpec,
IReadOnlyList <FeedRangeEpk> targetRanges,
Cosmos.PartitionKey?partitionKey,
int pageSize,
int maxConcurrency,
CosmosElement continuationToken,
CancellationToken cancellationToken)
{
if (targetRanges == null)
{
throw new ArgumentNullException(nameof(targetRanges));
}
if (targetRanges.Count == 0)
{
throw new ArgumentException($"{nameof(targetRanges)} must have some elements");
}
if (pageSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(pageSize));
}
TryCatch <CrossFeedRangeState <QueryState> > monadicExtractState = MonadicExtractState(continuationToken, targetRanges);
if (monadicExtractState.Failed)
{
return(TryCatch <IQueryPipelineStage> .FromException(monadicExtractState.Exception));
}
CrossFeedRangeState <QueryState> state = monadicExtractState.Result;
CrossPartitionRangePageAsyncEnumerator <QueryPage, QueryState> crossPartitionPageEnumerator = new CrossPartitionRangePageAsyncEnumerator <QueryPage, QueryState>(
documentContainer,
ParallelCrossPartitionQueryPipelineStage.MakeCreateFunction(documentContainer, sqlQuerySpec, pageSize, partitionKey, cancellationToken),
comparer: Comparer.Singleton,
maxConcurrency,
state: state,
cancellationToken: cancellationToken);
ParallelCrossPartitionQueryPipelineStage stage = new ParallelCrossPartitionQueryPipelineStage(crossPartitionPageEnumerator, cancellationToken);
return(TryCatch <IQueryPipelineStage> .FromResult(stage));
}
public static CrossPartitionReadFeedAsyncEnumerator Create(
IDocumentContainer documentContainer,
QueryRequestOptions queryRequestOptions,
CrossFeedRangeState <ReadFeedState> crossFeedRangeState,
int pageSize,
CancellationToken cancellationToken)
{
if (documentContainer == null)
{
throw new ArgumentNullException(nameof(documentContainer));
}
if (crossFeedRangeState == null)
{
throw new ArgumentNullException(nameof(crossFeedRangeState));
}
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 CrossPartitionChangeFeedAsyncEnumerator Create(
IDocumentContainer documentContainer,
CrossFeedRangeState <ChangeFeedState> state,
ChangeFeedPaginationOptions changeFeedPaginationOptions,
CancellationToken cancellationToken)
{
changeFeedPaginationOptions ??= ChangeFeedPaginationOptions.Default;
if (documentContainer == null)
{
throw new ArgumentNullException(nameof(documentContainer));
}
CrossPartitionRangePageAsyncEnumerator <ChangeFeedPage, ChangeFeedState> crossPartitionEnumerator = new CrossPartitionRangePageAsyncEnumerator <ChangeFeedPage, ChangeFeedState>(
documentContainer,
CrossPartitionChangeFeedAsyncEnumerator.MakeCreateFunction(
documentContainer,
changeFeedPaginationOptions,
cancellationToken),
comparer: default /* this uses a regular queue instead of prioirty queue */,
public async ValueTask <bool> MoveNextAsync()
{
if (!await this.enumerator.MoveNextAsync())
{
throw new InvalidOperationException("Change Feed should always be able to move next.");
}
TryCatch <CrossFeedRangePage <Pagination.ChangeFeedPage, ChangeFeedState> > monadicInnerChangeFeedPage = this.enumerator.Current;
if (monadicInnerChangeFeedPage.Failed)
{
this.Current = TryCatch <ChangeFeedPage> .FromException(monadicInnerChangeFeedPage.Exception);
return(true);
}
CrossFeedRangePage <Pagination.ChangeFeedPage, ChangeFeedState> innerChangeFeedPage = monadicInnerChangeFeedPage.Result;
CrossFeedRangeState <ChangeFeedState> crossFeedRangeState = innerChangeFeedPage.State;
ChangeFeedCrossFeedRangeState state = new ChangeFeedCrossFeedRangeState(crossFeedRangeState.Value);
ChangeFeedPage page = innerChangeFeedPage.Page switch
{
Pagination.ChangeFeedSuccessPage successPage => ChangeFeedPage.CreatePageWithChanges(
RestFeedResponseParser.ParseRestFeedResponse(
successPage.Content,
this.jsonSerializationFormatOptions),
successPage.RequestCharge,
successPage.ActivityId,
state,
successPage.AdditionalHeaders),
Pagination.ChangeFeedNotModifiedPage notModifiedPage => ChangeFeedPage.CreateNotModifiedPage(
notModifiedPage.RequestCharge,
notModifiedPage.ActivityId,
state,
notModifiedPage.AdditionalHeaders),
_ => throw new InvalidOperationException($"Unknown type: {innerChangeFeedPage.Page.GetType()}"),
};
this.Current = TryCatch <ChangeFeedPage> .FromResult(page);
return(true);
}
public async ValueTask <bool> MoveNextAsync()
{
if (!await this.enumerator.MoveNextAsync())
{
throw new InvalidOperationException("Change Feed should always be able to move next.");
}
TryCatch <CrossFeedRangePage <Pagination.ChangeFeedPage, ChangeFeedState> > monadicInnerChangeFeedPage = this.enumerator.Current;
if (monadicInnerChangeFeedPage.Failed)
{
this.Current = TryCatch <ChangeFeedPage> .FromException(monadicInnerChangeFeedPage.Exception);
return(true);
}
CrossFeedRangePage <Pagination.ChangeFeedPage, ChangeFeedState> innerChangeFeedPage = monadicInnerChangeFeedPage.Result;
CrossFeedRangeState <ChangeFeedState> crossFeedRangeState = innerChangeFeedPage.State;
ChangeFeedCrossFeedRangeState state = new ChangeFeedCrossFeedRangeState(crossFeedRangeState.Value);
ChangeFeedPage page = innerChangeFeedPage.Page switch
{
Pagination.ChangeFeedSuccessPage successPage => ChangeFeedPage.CreatePageWithChanges(
CosmosQueryClientCore.ParseElementsFromRestStream(
successPage.Content,
Documents.ResourceType.Document,
cosmosSerializationOptions: null),
successPage.RequestCharge,
successPage.ActivityId,
state),
Pagination.ChangeFeedNotModifiedPage notModifiedPage => ChangeFeedPage.CreateNotModifiedPage(
notModifiedPage.RequestCharge,
notModifiedPage.ActivityId,
state),
_ => throw new InvalidOperationException($"Unknown type: {innerChangeFeedPage.Page.GetType()}"),
};
this.Current = TryCatch <ChangeFeedPage> .FromResult(page);
return(true);
}
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,
public async Task ShouldReturnNotModifiedAfterCyclingOnAllRanges(int partitions)
{
ReadOnlyMemory<FeedRangeState<ChangeFeedState>> rangeStates = null;
if (partitions == 1)
{
rangeStates = new FeedRangeState<ChangeFeedState>[]{
new FeedRangeState<ChangeFeedState>(FeedRangeEpk.FullRange, ChangeFeedState.Now())
};
}
if (partitions == 2)
{
rangeStates = new FeedRangeState<ChangeFeedState>[]{
new FeedRangeState<ChangeFeedState>(new FeedRangeEpk(new Documents.Routing.Range<string>("", "AA", true, false)), ChangeFeedState.Now()),
new FeedRangeState<ChangeFeedState>(new FeedRangeEpk(new Documents.Routing.Range<string>("AA", "FF", true, false)), ChangeFeedState.Now()),
};
}
if (partitions == 3)
{
rangeStates = new FeedRangeState<ChangeFeedState>[]{
new FeedRangeState<ChangeFeedState>(new FeedRangeEpk(new Documents.Routing.Range<string>("", "AA", true, false)), ChangeFeedState.Now()),
new FeedRangeState<ChangeFeedState>(new FeedRangeEpk(new Documents.Routing.Range<string>("AA", "BB", true, false)), ChangeFeedState.Now()),
new FeedRangeState<ChangeFeedState>(new FeedRangeEpk(new Documents.Routing.Range<string>("BB", "FF", true, false)), ChangeFeedState.Now()),
};
}
Assert.IsNotNull(rangeStates, $"Range states not initialized for {partitions} partitions");
CrossFeedRangeState<ChangeFeedState> state = new CrossFeedRangeState<ChangeFeedState>(rangeStates);
Mock<IDocumentContainer> documentContainer = new Mock<IDocumentContainer>();
// Returns a 304 with 1RU charge
documentContainer.Setup(c => c.MonadicChangeFeedAsync(
It.IsAny<FeedRangeState<ChangeFeedState>>(),
It.IsAny<ChangeFeedPaginationOptions>(),
It.IsAny<ITrace>(),
It.IsAny<CancellationToken>())).ReturnsAsync(
(FeedRangeState<ChangeFeedState> state, ChangeFeedPaginationOptions options, ITrace trace, CancellationToken token)
=> TryCatch<ChangeFeedPage>.FromResult(new ChangeFeedNotModifiedPage(requestCharge: 1, activityId: string.Empty, additionalHeaders: default, state.State)));
public async ValueTask <bool> MoveNextAsync(ITrace trace)
{
this.cancellationToken.ThrowIfCancellationRequested();
if (trace == null)
{
throw new ArgumentNullException(nameof(trace));
}
if (!await this.crossPartitionRangePageAsyncEnumerator.MoveNextAsync(trace))
{
this.Current = default;
return(false);
}
TryCatch <CrossFeedRangePage <QueryPage, QueryState> > currentCrossPartitionPage = this.crossPartitionRangePageAsyncEnumerator.Current;
if (currentCrossPartitionPage.Failed)
{
this.Current = TryCatch <QueryPage> .FromException(currentCrossPartitionPage.Exception);
return(true);
}
CrossFeedRangePage <QueryPage, QueryState> crossPartitionPageResult = currentCrossPartitionPage.Result;
QueryPage backendQueryPage = crossPartitionPageResult.Page;
CrossFeedRangeState <QueryState> crossPartitionState = crossPartitionPageResult.State;
QueryState queryState;
if (crossPartitionState == null)
{
queryState = null;
}
else
{
// left most and any non null continuations
IOrderedEnumerable <FeedRangeState <QueryState> > feedRangeStates = crossPartitionState
.Value
.ToArray()
.OrderBy(tuple => ((FeedRangeEpk)tuple.FeedRange).Range.Min);
List <ParallelContinuationToken> activeParallelContinuationTokens = new List <ParallelContinuationToken>();
{
FeedRangeState <QueryState> firstState = feedRangeStates.First();
ParallelContinuationToken firstParallelContinuationToken = new ParallelContinuationToken(
token: firstState.State != null ? ((CosmosString)firstState.State.Value).Value : null,
range: ((FeedRangeEpk)firstState.FeedRange).Range);
activeParallelContinuationTokens.Add(firstParallelContinuationToken);
}
foreach (FeedRangeState <QueryState> feedRangeState in feedRangeStates.Skip(1))
{
this.cancellationToken.ThrowIfCancellationRequested();
if (feedRangeState.State != null)
{
ParallelContinuationToken parallelContinuationToken = new ParallelContinuationToken(
token: feedRangeState.State != null ? ((CosmosString)feedRangeState.State.Value).Value : null,
range: ((FeedRangeEpk)feedRangeState.FeedRange).Range);
activeParallelContinuationTokens.Add(parallelContinuationToken);
}
}
IEnumerable <CosmosElement> cosmosElementContinuationTokens = activeParallelContinuationTokens
.Select(token => ParallelContinuationToken.ToCosmosElement(token));
CosmosArray cosmosElementParallelContinuationTokens = CosmosArray.Create(cosmosElementContinuationTokens);
queryState = new QueryState(cosmosElementParallelContinuationTokens);
}
QueryPage crossPartitionQueryPage = new QueryPage(
backendQueryPage.Documents,
backendQueryPage.RequestCharge,
backendQueryPage.ActivityId,
backendQueryPage.ResponseLengthInBytes,
backendQueryPage.CosmosQueryExecutionInfo,
backendQueryPage.DisallowContinuationTokenMessage,
queryState);
this.Current = TryCatch <QueryPage> .FromResult(crossPartitionQueryPage);
return(true);
}
private static TryCatch <CrossFeedRangeState <QueryState> > MonadicExtractState(
CosmosElement continuationToken,
IReadOnlyList <FeedRangeEpk> ranges)
{
if (continuationToken == null)
{
// Full fan out to the ranges with null continuations
CrossFeedRangeState <QueryState> fullFanOutState = new CrossFeedRangeState <QueryState>(ranges.Select(range => new FeedRangeState <QueryState>(range, (QueryState)null)).ToArray());
return(TryCatch <CrossFeedRangeState <QueryState> > .FromResult(fullFanOutState));
}
if (!(continuationToken is CosmosArray parallelContinuationTokenListRaw))
{
return(TryCatch <CrossFeedRangeState <QueryState> > .FromException(
new MalformedContinuationTokenException(
$"Invalid format for continuation token {continuationToken} for {nameof(ParallelCrossPartitionQueryPipelineStage)}")));
}
if (parallelContinuationTokenListRaw.Count == 0)
{
return(TryCatch <CrossFeedRangeState <QueryState> > .FromException(
new MalformedContinuationTokenException(
$"Invalid format for continuation token {continuationToken} for {nameof(ParallelCrossPartitionQueryPipelineStage)}")));
}
List <ParallelContinuationToken> parallelContinuationTokens = new List <ParallelContinuationToken>();
foreach (CosmosElement parallelContinuationTokenRaw in parallelContinuationTokenListRaw)
{
TryCatch <ParallelContinuationToken> tryCreateParallelContinuationToken = ParallelContinuationToken.TryCreateFromCosmosElement(parallelContinuationTokenRaw);
if (tryCreateParallelContinuationToken.Failed)
{
return(TryCatch <CrossFeedRangeState <QueryState> > .FromException(
tryCreateParallelContinuationToken.Exception));
}
parallelContinuationTokens.Add(tryCreateParallelContinuationToken.Result);
}
TryCatch <PartitionMapping <ParallelContinuationToken> > partitionMappingMonad = PartitionMapper.MonadicGetPartitionMapping(
ranges,
parallelContinuationTokens);
if (partitionMappingMonad.Failed)
{
return(TryCatch <CrossFeedRangeState <QueryState> > .FromException(
partitionMappingMonad.Exception));
}
PartitionMapping <ParallelContinuationToken> partitionMapping = partitionMappingMonad.Result;
List <FeedRangeState <QueryState> > feedRangeStates = new List <FeedRangeState <QueryState> >();
List <IReadOnlyDictionary <FeedRangeEpk, ParallelContinuationToken> > rangesToInitialize = new List <IReadOnlyDictionary <FeedRangeEpk, ParallelContinuationToken> >()
{
// Skip all the partitions left of the target range, since they have already been drained fully.
partitionMapping.TargetMapping,
partitionMapping.MappingRightOfTarget,
};
foreach (IReadOnlyDictionary <FeedRangeEpk, ParallelContinuationToken> rangeToInitalize in rangesToInitialize)
{
foreach (KeyValuePair <FeedRangeEpk, ParallelContinuationToken> kvp in rangeToInitalize)
{
FeedRangeState <QueryState> feedRangeState = new FeedRangeState <QueryState>(kvp.Key, kvp.Value?.Token != null ? new QueryState(CosmosString.Create(kvp.Value.Token)) : null);
feedRangeStates.Add(feedRangeState);
}
}
CrossFeedRangeState <QueryState> crossPartitionState = new CrossFeedRangeState <QueryState>(feedRangeStates.ToArray());
return(TryCatch <CrossFeedRangeState <QueryState> > .FromResult(crossPartitionState));
}
public CrossFeedRangePage(TBackendPage backendEndPage, CrossFeedRangeState <TBackendState> state)
: base(state)
{
this.Page = backendEndPage;
}
private async Task <ResponseMessage> ReadNextInternalAsync(ITrace trace, CancellationToken cancellationToken = default)
{
if (trace == null)
{
throw new ArgumentNullException(nameof(trace));
}
TryCatch <CrossPartitionChangeFeedAsyncEnumerator> monadicEnumerator = await this.lazyMonadicEnumerator.GetValueAsync(trace, cancellationToken);
if (monadicEnumerator.Failed)
{
Exception createException = monadicEnumerator.Exception;
if (!ExceptionToCosmosException.TryCreateFromException(
createException,
trace,
out CosmosException cosmosException))
{
// Initialization issue, there are no enumerators to invoke
this.hasMoreResults = false;
throw createException;
}
return(new ResponseMessage(
cosmosException.StatusCode,
requestMessage: null,
headers: cosmosException.Headers,
cosmosException: cosmosException,
trace: trace));
}
CrossPartitionChangeFeedAsyncEnumerator enumerator = monadicEnumerator.Result;
enumerator.SetCancellationToken(cancellationToken);
try
{
if (!await enumerator.MoveNextAsync(trace))
{
throw new InvalidOperationException("ChangeFeed enumerator should always have a next continuation");
}
}
catch (OperationCanceledException ex) when(!(ex is CosmosOperationCanceledException))
{
throw new CosmosOperationCanceledException(ex, trace);
}
if (enumerator.Current.Failed)
{
if (!ExceptionToCosmosException.TryCreateFromException(
enumerator.Current.Exception,
trace,
out CosmosException cosmosException))
{
throw ExceptionWithStackTraceException.UnWrapMonadExcepion(enumerator.Current.Exception, trace);
}
if (!IsRetriableException(cosmosException))
{
this.hasMoreResults = false;
}
return(new ResponseMessage(
cosmosException.StatusCode,
requestMessage: null,
headers: cosmosException.Headers,
cosmosException: cosmosException,
trace: trace));
}
CrossFeedRangePage <Pagination.ChangeFeedPage, ChangeFeedState> crossFeedRangePage = enumerator.Current.Result;
Pagination.ChangeFeedPage changeFeedPage = crossFeedRangePage.Page;
ResponseMessage responseMessage;
if (changeFeedPage is Pagination.ChangeFeedSuccessPage changeFeedSuccessPage)
{
responseMessage = new ResponseMessage(statusCode: System.Net.HttpStatusCode.OK)
{
Content = changeFeedSuccessPage.Content
};
}
else
{
responseMessage = new ResponseMessage(statusCode: System.Net.HttpStatusCode.NotModified);
}
CrossFeedRangeState <ChangeFeedState> crossFeedRangeState = crossFeedRangePage.State;
ChangeFeedCrossFeedRangeState changeFeedCrossFeedRangeState = new ChangeFeedCrossFeedRangeState(crossFeedRangeState.Value);
string continuationToken = VersionedAndRidCheckedCompositeToken.ToCosmosElement(
new VersionedAndRidCheckedCompositeToken(
VersionedAndRidCheckedCompositeToken.Version.V2,
changeFeedCrossFeedRangeState.ToCosmosElement(),
await this.documentContainer.GetResourceIdentifierAsync(trace, cancellationToken))).ToString();
responseMessage.Headers.ContinuationToken = continuationToken;
responseMessage.Headers.RequestCharge = changeFeedPage.RequestCharge;
responseMessage.Headers.ActivityId = changeFeedPage.ActivityId;
responseMessage.Trace = trace;
return(responseMessage);
}
public override async Task <ResponseMessage> ReadNextAsync(
ITrace trace,
CancellationToken cancellationToken = default)
{
if (trace == null)
{
throw new ArgumentNullException(nameof(trace));
}
cancellationToken.ThrowIfCancellationRequested();
if (!this.hasMoreResults)
{
throw new InvalidOperationException("Should not be calling FeedIterator that does not have any more results");
}
if (this.monadicEnumerator.Failed)
{
this.hasMoreResults = false;
CosmosException cosmosException = ExceptionToCosmosException.CreateFromException(this.monadicEnumerator.Exception);
return(new ResponseMessage(
statusCode: System.Net.HttpStatusCode.BadRequest,
requestMessage: null,
headers: cosmosException.Headers,
cosmosException: cosmosException,
trace: trace));
}
CrossPartitionReadFeedAsyncEnumerator enumerator = this.monadicEnumerator.Result;
TryCatch <CrossFeedRangePage <Pagination.ReadFeedPage, ReadFeedState> > monadicPage;
try
{
if (!await enumerator.MoveNextAsync(trace))
{
throw new InvalidOperationException("Should not be calling enumerator that does not have any more results");
}
monadicPage = enumerator.Current;
}
catch (Exception ex)
{
monadicPage = TryCatch <CrossFeedRangePage <Pagination.ReadFeedPage, ReadFeedState> > .FromException(ex);
}
if (monadicPage.Failed)
{
CosmosException cosmosException = ExceptionToCosmosException.CreateFromException(monadicPage.Exception);
if (!IsRetriableException(cosmosException))
{
this.hasMoreResults = false;
}
return(new ResponseMessage(
statusCode: cosmosException.StatusCode,
requestMessage: null,
headers: cosmosException.Headers,
cosmosException: cosmosException,
trace: trace));
}
CrossFeedRangePage <Pagination.ReadFeedPage, ReadFeedState> crossFeedRangePage = monadicPage.Result;
if (crossFeedRangePage.State == default)
{
this.hasMoreResults = false;
}
// Make the continuation token match the older format:
string continuationToken;
if (crossFeedRangePage.State != null)
{
List <CompositeContinuationToken> compositeContinuationTokens = new List <CompositeContinuationToken>();
CrossFeedRangeState <ReadFeedState> crossFeedRangeState = crossFeedRangePage.State;
for (int i = 0; i < crossFeedRangeState.Value.Length; i++)
{
FeedRangeState <ReadFeedState> feedRangeState = crossFeedRangeState.Value.Span[i];
FeedRangeEpk feedRange;
if (feedRangeState.FeedRange is FeedRangeEpk feedRangeEpk)
{
feedRange = feedRangeEpk;
}
else
{
feedRange = FeedRangeEpk.FullRange;
}
ReadFeedState readFeedState = feedRangeState.State;
CompositeContinuationToken compositeContinuationToken = new CompositeContinuationToken()
{
Range = feedRange.Range,
Token = readFeedState is ReadFeedBeginningState ? null : ((ReadFeedContinuationState)readFeedState).ContinuationToken.ToString(),
};
compositeContinuationTokens.Add(compositeContinuationToken);
}
FeedRangeInternal outerFeedRange;
if ((this.queryRequestOptions != null) && this.queryRequestOptions.PartitionKey.HasValue)
{
outerFeedRange = new FeedRangePartitionKey(this.queryRequestOptions.PartitionKey.Value);
}
else if ((this.queryRequestOptions != null) && (this.queryRequestOptions.FeedRange != null))
{
outerFeedRange = (FeedRangeInternal)this.queryRequestOptions.FeedRange;
}
else
{
outerFeedRange = FeedRangeEpk.FullRange;
}
FeedRangeCompositeContinuation feedRangeCompositeContinuation = new FeedRangeCompositeContinuation(
containerRid: string.Empty,
feedRange: outerFeedRange,
compositeContinuationTokens);
continuationToken = feedRangeCompositeContinuation.ToString();
}
else
{
continuationToken = null;
}
Pagination.ReadFeedPage page = crossFeedRangePage.Page;
Headers headers = new Headers()
{
RequestCharge = page.RequestCharge,
ActivityId = page.ActivityId,
ContinuationToken = continuationToken,
};
foreach (KeyValuePair <string, string> kvp in page.AdditionalHeaders)
{
headers[kvp.Key] = kvp.Value;
}
return(new ResponseMessage(
statusCode: System.Net.HttpStatusCode.OK,
requestMessage: default,
public override async Task <ResponseMessage> ReadNextAsync(CancellationToken cancellationToken = default)
{
cancellationToken.ThrowIfCancellationRequested();
TryCatch <CrossPartitionChangeFeedAsyncEnumerator> monadicEnumerator = await this.lazyMonadicEnumerator.GetValueAsync(cancellationToken);
if (monadicEnumerator.Failed)
{
Exception createException = monadicEnumerator.Exception;
CosmosException cosmosException = ExceptionToCosmosException.CreateFromException(createException);
return(new ResponseMessage(
cosmosException.StatusCode,
requestMessage: null,
headers: cosmosException.Headers,
cosmosException: cosmosException,
diagnostics: new CosmosDiagnosticsContextCore()));
}
CrossPartitionChangeFeedAsyncEnumerator enumerator = monadicEnumerator.Result;
if (!await enumerator.MoveNextAsync())
{
throw new InvalidOperationException("ChangeFeed enumerator should always have a next continuation");
}
if (enumerator.Current.Failed)
{
CosmosException cosmosException = ExceptionToCosmosException.CreateFromException(enumerator.Current.Exception);
if (!IsRetriableException(cosmosException))
{
this.hasMoreResults = false;
}
return(new ResponseMessage(
cosmosException.StatusCode,
requestMessage: null,
headers: cosmosException.Headers,
cosmosException: cosmosException,
diagnostics: new CosmosDiagnosticsContextCore()));
}
CrossFeedRangePage <Pagination.ChangeFeedPage, ChangeFeedState> crossFeedRangePage = enumerator.Current.Result;
Pagination.ChangeFeedPage changeFeedPage = crossFeedRangePage.Page;
ResponseMessage responseMessage;
if (changeFeedPage is Pagination.ChangeFeedSuccessPage changeFeedSuccessPage)
{
responseMessage = new ResponseMessage(statusCode: System.Net.HttpStatusCode.OK)
{
Content = changeFeedSuccessPage.Content
};
}
else
{
responseMessage = new ResponseMessage(statusCode: System.Net.HttpStatusCode.NotModified);
}
CrossFeedRangeState <ChangeFeedState> crossFeedRangeState = crossFeedRangePage.State;
string continuationToken;
if (this.changeFeedRequestOptions.EmitOldContinuationToken)
{
List <CompositeContinuationToken> compositeContinuationTokens = new List <CompositeContinuationToken>();
for (int i = 0; i < crossFeedRangeState.Value.Length; i++)
{
FeedRangeState <ChangeFeedState> changeFeedFeedRangeState = crossFeedRangeState.Value.Span[i];
string token = changeFeedFeedRangeState.State is ChangeFeedStateContinuation changeFeedStateContinuation ? ((CosmosString)changeFeedStateContinuation.ContinuationToken).Value : null;
Documents.Routing.Range <string> range = ((FeedRangeEpk)changeFeedFeedRangeState.FeedRange).Range;
CompositeContinuationToken compositeContinuationToken = new CompositeContinuationToken()
{
Range = range,
Token = token,
};
compositeContinuationTokens.Add(compositeContinuationToken);
}
FeedRangeCompositeContinuation feedRangeCompositeContinuationToken = new FeedRangeCompositeContinuation(
await this.documentContainer.GetResourceIdentifierAsync(cancellationToken),
FeedRangeEpk.FullRange,
compositeContinuationTokens);
continuationToken = feedRangeCompositeContinuationToken.ToString();
}
else
{
ChangeFeedCrossFeedRangeState changeFeedCrossFeedRangeState = new ChangeFeedCrossFeedRangeState(crossFeedRangeState.Value);
continuationToken = VersionedAndRidCheckedCompositeToken.ToCosmosElement(
new VersionedAndRidCheckedCompositeToken(
VersionedAndRidCheckedCompositeToken.Version.V2,
changeFeedCrossFeedRangeState.ToCosmosElement(),
await this.documentContainer.GetResourceIdentifierAsync(cancellationToken))).ToString();
}
responseMessage.Headers.ContinuationToken = continuationToken;
responseMessage.Headers.RequestCharge = changeFeedPage.RequestCharge;
responseMessage.Headers.ActivityId = changeFeedPage.ActivityId;
return(responseMessage);
}
