public override async Task <QueryResponseCore> DrainAsync(int maxElements, CancellationToken token)
{
token.ThrowIfCancellationRequested();
QueryResponseCore results = await base.DrainAsync(maxElements, token);
if (!results.IsSuccess)
{
return(results);
}
List <CosmosElement> takedDocuments = results.CosmosElements.Take(this.takeCount).ToList();
this.takeCount -= takedDocuments.Count;
string updatedContinuationToken = null;
if (results.DisallowContinuationTokenMessage == null)
{
if (!this.IsDone)
{
string sourceContinuation = results.ContinuationToken;
TakeContinuationToken takeContinuationToken;
switch (this.takeEnum)
{
case TakeEnum.Limit:
takeContinuationToken = new LimitContinuationToken(
this.takeCount,
sourceContinuation);
break;
case TakeEnum.Top:
takeContinuationToken = new TopContinuationToken(
this.takeCount,
sourceContinuation);
break;
default:
throw new ArgumentException($"Unknown {nameof(TakeEnum)}: {this.takeEnum}");
}
updatedContinuationToken = takeContinuationToken.ToString();
}
}
return(QueryResponseCore.CreateSuccess(
result: takedDocuments,
continuationToken: updatedContinuationToken,
disallowContinuationTokenMessage: results.DisallowContinuationTokenMessage,
activityId: results.ActivityId,
requestCharge: results.RequestCharge,
queryMetricsText: results.QueryMetricsText,
queryMetrics: results.QueryMetrics,
requestStatistics: results.RequestStatistics,
responseLengthBytes: results.ResponseLengthBytes));
}
public override async Task <FeedResponse <CosmosElement> > DrainAsync(int maxElements, CancellationToken token)
{
FeedResponse <CosmosElement> results = await base.DrainAsync(maxElements, token);
List <CosmosElement> takedDocuments = results.Take(this.takeCount).ToList();
results = new FeedResponse <CosmosElement>(
takedDocuments,
takedDocuments.Count,
results.Headers,
results.UseETagAsContinuation,
results.QueryMetrics,
results.RequestStatistics,
results.DisallowContinuationTokenMessage,
results.ResponseLengthBytes);
this.takeCount -= takedDocuments.Count;
if (results.DisallowContinuationTokenMessage == null)
{
if (!this.IsDone)
{
string sourceContinuation = results.ResponseContinuation;
TakeContinuationToken takeContinuationToken;
switch (this.takeEnum)
{
case TakeEnum.Limit:
takeContinuationToken = new LimitContinuationToken(
this.takeCount,
sourceContinuation);
break;
case TakeEnum.Top:
takeContinuationToken = new TopContinuationToken(
this.takeCount,
sourceContinuation);
break;
default:
throw new ArgumentException($"Unknown {nameof(TakeEnum)}: {takeEnum}");
}
results.ResponseContinuation = takeContinuationToken.ToString();
}
else
{
results.ResponseContinuation = null;
}
}
return(results);
}
public override async Task <QueryResponse> DrainAsync(int maxElements, CancellationToken token)
{
token.ThrowIfCancellationRequested();
QueryResponse results = await base.DrainAsync(maxElements, token);
if (!results.IsSuccessStatusCode)
{
return(results);
}
List <CosmosElement> takedDocuments = results.CosmosElements.Take(this.takeCount).ToList();
this.takeCount -= takedDocuments.Count;
string updatedContinuationToken = null;
if (results.QueryHeaders.DisallowContinuationTokenMessage == null)
{
if (!this.IsDone)
{
string sourceContinuation = results.Headers.ContinuationToken;
TakeContinuationToken takeContinuationToken;
switch (this.takeEnum)
{
case TakeEnum.Limit:
takeContinuationToken = new LimitContinuationToken(
this.takeCount,
sourceContinuation);
break;
case TakeEnum.Top:
takeContinuationToken = new TopContinuationToken(
this.takeCount,
sourceContinuation);
break;
default:
throw new ArgumentException($"Unknown {nameof(TakeEnum)}: {this.takeEnum}");
}
updatedContinuationToken = takeContinuationToken.ToString();
}
}
return(QueryResponse.CreateSuccess(
takedDocuments,
takedDocuments.Count,
results.ResponseLengthBytes,
results.QueryHeaders.CloneKnownProperties(updatedContinuationToken, results.QueryHeaders.DisallowContinuationTokenMessage),
results.queryMetrics));
}
public override bool TryGetContinuationToken(out string state)
{
if (!this.IsDone)
{
if (this.Source.TryGetContinuationToken(out string sourceState))
{
TakeContinuationToken takeContinuationToken;
switch (this.takeEnum)
{
case TakeEnum.Limit:
takeContinuationToken = new LimitContinuationToken(
this.takeCount,
sourceState);
break;
case TakeEnum.Top:
takeContinuationToken = new TopContinuationToken(
this.takeCount,
sourceState);
break;
default:
throw new ArgumentException($"Unknown {nameof(TakeEnum)}: {this.takeEnum}");
}
state = takeContinuationToken.ToString();
return(true);
}
else
{
state = default(string);
return(false);
}
}
else
{
state = default(string);
return(true);
}
}