private async Task <int> ExecuteCount(string filter, CancellationToken token)
{
var query = new CT.TableQuery <FatEntity>();
if (filter != null)
{
query = query.Where(filter);
}
// Just select one column to reduce the payload significantly
query.SelectColumns = new List <string> {
"PartitionKey"
};
int count = 0;
CT.TableQuerySegment <FatEntity> segment = null;
do
{
segment = await _table.ExecuteWrap(t => t.ExecuteQuerySegmentedAsync(query, segment?.ContinuationToken, null, null, token)).ConfigureAwait(false);
count += segment.Results.Count;
}while (segment.ContinuationToken != null);
return(count);
}
private IAsyncEnumerable <T> ExecuteQuery(string filter, int?take)
{
return(AsyncEnumerableEx.Create <T>(async y =>
{
var query = new CT.TableQuery <FatEntity>();
if (filter != null)
{
query = query.Where(filter);
}
if (take.HasValue)
{
query = query.Take(take);
}
CT.TableQuerySegment <FatEntity> segment = null;
do
{
segment = await _table.ExecuteWrap(t => t.ExecuteQuerySegmentedAsync(query, segment == null ? null : segment.ContinuationToken, null, null, y.CancellationToken)).ConfigureAwait(false);
foreach (var entity in segment)
{
await y.YieldReturn(ConvertFatEntity(entity)).ConfigureAwait(false);
y.ThrowIfCancellationRequested();
}
}while (segment.ContinuationToken != null && !y.CancellationToken.IsCancellationRequested);
}));
}
