public override async Task <QueryResponseCore> ExecuteNextAsync(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
// If the cache is stale the entire execute context has incorrect values and should be recreated.
// This should only be done for the first execution.
// If results have already been pulled,
// then an error should be returned to the user,
// since it's not possible to combine query results from multiple containers.
QueryResponseCore queryResponse = await this.currentCosmosQueryExecutionContext.ExecuteNextAsync(cancellationToken);
if (
(queryResponse.StatusCode == System.Net.HttpStatusCode.Gone) &&
(queryResponse.SubStatusCode == Documents.SubStatusCodes.NameCacheIsStale) &&
!this.alreadyRetried)
{
await this.cosmosQueryContext.QueryClient.ForceRefreshCollectionCacheAsync(
this.cosmosQueryContext.ResourceLink.OriginalString,
cancellationToken);
this.alreadyRetried = true;
this.currentCosmosQueryExecutionContext.Dispose();
this.currentCosmosQueryExecutionContext = this.cosmosQueryExecutionContextFactory();
return(await this.ExecuteNextAsync(cancellationToken));
}
return(queryResponse);
}
public CosmosQueryExecutionContextWithNameCacheStaleRetry(
CosmosQueryContext cosmosQueryContext,
Func <CosmosQueryExecutionContext> cosmosQueryExecutionContextFactory)
{
this.cosmosQueryContext = cosmosQueryContext ?? throw new ArgumentNullException(nameof(cosmosQueryContext));
this.cosmosQueryExecutionContextFactory = cosmosQueryExecutionContextFactory ?? throw new ArgumentNullException(nameof(cosmosQueryExecutionContextFactory));
this.currentCosmosQueryExecutionContext = cosmosQueryExecutionContextFactory();
}
public CatchAllCosmosQueryExecutionContext(
CosmosQueryExecutionContext cosmosQueryExecutionContext)
{
if (cosmosQueryExecutionContext == null)
{
throw new ArgumentNullException(nameof(cosmosQueryExecutionContext));
}
this.cosmosQueryExecutionContext = cosmosQueryExecutionContext;
}
public override async Task <QueryResponseCore> ExecuteNextAsync(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
TryCatch <CosmosQueryExecutionContext> tryCreateCosmosQueryExecutionContext = await this.lazyTryCreateCosmosQueryExecutionContext.GetValueAsync(cancellationToken);
if (!tryCreateCosmosQueryExecutionContext.Succeeded)
{
return(QueryResponseFactory.CreateFromException(tryCreateCosmosQueryExecutionContext.Exception));
}
CosmosQueryExecutionContext cosmosQueryExecutionContext = tryCreateCosmosQueryExecutionContext.Result;
QueryResponseCore queryResponseCore = await cosmosQueryExecutionContext.ExecuteNextAsync(cancellationToken);
return(queryResponseCore);
}
