public Task GetCandlesByChunksAsync(string assetPair, CandlePriceType priceType, DateTime endDate, Func <IEnumerable <IFeedHistory>, Task> readChunkFunc)
{
var partition = FeedHistoryEntity.GeneratePartitionKey(assetPair, priceType);
var filter = TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partition);
var tableQuery = new TableQuery <FeedHistoryEntity>().Where(filter);
var feedEndDate = endDate.RoundToMinute();
return(_tableStorage.GetDataByChunksAsync(tableQuery, async chunk =>
{
var yieldResult = new List <IFeedHistory>();
foreach (var historyItem in chunk.Where(item => item.DateTime <= feedEndDate))
{
yieldResult.Add(FeedHistory.Create(historyItem));
}
if (yieldResult.Count > 0)
{
await readChunkFunc(yieldResult);
}
}));
}
public async Task <IFeedHistory> GetTopRecordAsync(string assetPair, CandlePriceType priceType)
{
var entity = await _tableStorage.GetTopRecordAsync($"{assetPair}_{priceType}");
return(entity != null?FeedHistory.Create(entity) : null);
}