public async Task <IActionResult> GetAvailableAssetPairsHistoryDepth()
{
try
{
var assetPairs = await _assetPairsManager.GetAllAsync();
// Now we do select new history depth items in parallel style for each asset pair,
// but the depth item constructor itself executes 4 awaitable queries non-parallel.
// I.e., if we have 10 asset pairs, we get here 10 parallel tasks with 4 sequential
// data queries in each, but not 10 * 4 parallel tasks.
var result = await Task.WhenAll(
assetPairs
.Where(p => _candleHistoryAssetConnections.ContainsKey(p.Id))
.Select(async p => new CandlesHistoryDepthResponseModel
{
AssetPairId = p.Id,
OldestAskTimestamp = (await _candlesManager.TryGetOldestCandleAsync(p.Id, CandlePriceType.Ask, CandleTimeInterval.Sec))?.Timestamp,
OldestBidTimestamp = (await _candlesManager.TryGetOldestCandleAsync(p.Id, CandlePriceType.Bid, CandleTimeInterval.Sec))?.Timestamp,
OldestMidTimestamp = (await _candlesManager.TryGetOldestCandleAsync(p.Id, CandlePriceType.Mid, CandleTimeInterval.Sec))?.Timestamp,
OldestTradesTimestamp = (await _candlesManager.TryGetOldestCandleAsync(p.Id, CandlePriceType.Trades, CandleTimeInterval.Sec))?.Timestamp
})
);
return(Ok(result));
}
catch (Exception ex)
{
return(StatusCode((int)HttpStatusCode.InternalServerError, ErrorResponse.Create("Internal", ex.Message)));
}
}
