public override async ValueTask <bool> MoveNextAsync(ITrace trace)
{
if (trace == null)
{
throw new ArgumentNullException(nameof(trace));
}
try
{
if (!await this.inputStage.MoveNextAsync(trace))
{
this.Current = default;
return(false);
}
this.Current = this.inputStage.Current;
return(true);
}
catch (Exception ex)
{
if (!ExceptionToCosmosException.TryCreateFromException(ex, trace, out CosmosException cosmosException))
{
throw;
}
this.Current = TryCatch <QueryPage> .FromException(cosmosException);
return(true);
}
}
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);
}
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))
{
throw createException;
}
return(new ResponseMessage(
cosmosException.StatusCode,
requestMessage: null,
headers: cosmosException.Headers,
cosmosException: cosmosException,
trace: trace));
}
CrossPartitionChangeFeedAsyncEnumerator enumerator = monadicEnumerator.Result;
if (!await enumerator.MoveNextAsync(trace))
{
throw new InvalidOperationException("ChangeFeed enumerator should always have a next continuation");
}
if (enumerator.Current.Failed)
{
if (!ExceptionToCosmosException.TryCreateFromException(
enumerator.Current.Exception,
trace,
out CosmosException cosmosException))
{
throw enumerator.Current.Exception;
}
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;
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(trace, 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(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));
}
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;
if (!ExceptionToCosmosException.TryCreateFromException(this.monadicEnumerator.Exception, trace, out CosmosException cosmosException))
{
throw 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;
enumerator.SetCancellationToken(cancellationToken);
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 (OperationCanceledException ex) when(!(ex is CosmosOperationCanceledException))
{
throw new CosmosOperationCanceledException(ex, trace);
}
if (monadicPage.Failed)
{
if (!ExceptionToCosmosException.TryCreateFromException(monadicPage.Exception, trace, out CosmosException cosmosException))
{
throw 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,