/// <summary>
/// Get the next set of results from the cosmos service
/// </summary>
/// <param name="cancellationToken">(Optional) <see cref="CancellationToken"/> representing request cancellation.</param>
/// <returns>A query response from cosmos service</returns>
public override Task <CosmosResponseMessage> FetchNextSetAsync(CancellationToken cancellationToken = default(CancellationToken))
{
return(this.nextResultSetDelegate(this.MaxItemCount, this.continuationToken, this.queryOptions, this.state, cancellationToken)
.ContinueWith(task =>
{
CosmosResponseMessage response = task.Result;
this.continuationToken = response.Headers.ETag;
this.HasMoreResults = ChangeFeedResultSetStreamIterator.GetHasMoreResults(this.continuationToken, response.StatusCode);
return response;
}, cancellationToken));
}
internal static CosmosQueryResponse <TInput> CreateCosmosQueryFeedResponse <TInput>(
CosmosResponseMessage cosmosResponseMessage,
CosmosJsonSerializer jsonSerializer)
{
using (cosmosResponseMessage)
{
// Throw the exception if the query failed: EnsureSuccessStatusCode only
// validates 200-299. 304 is valid for Changefeed so do not throw on that.
if (cosmosResponseMessage.StatusCode != HttpStatusCode.NotModified)
{
cosmosResponseMessage.EnsureSuccessStatusCode();
}
string continuationToken = cosmosResponseMessage.Headers.ETag;
bool hasMoreResults = ChangeFeedResultSetStreamIterator.GetHasMoreResults(continuationToken, cosmosResponseMessage.StatusCode);
return(CosmosQueryResponse <TInput> .CreateResponse <TInput>(
stream : cosmosResponseMessage.Content,
jsonSerializer : jsonSerializer,
continuationToken : continuationToken,
hasMoreResults : hasMoreResults));
}
}
