public async Task <List <MarketCoin> > GetAllCoinsMarketDetailsAPI()
{
if (_memoryCache.TryGetValue(Constant.Session.GlobalAllCoinsAPIData, out MarketFetchData marketData))
{
if (marketData.LastUpdated.AddSeconds(45) < DateTime.Now) // Update/Refresh Data
{
if (marketData.CurrentlyUpdating && marketData.LastUpdated.AddMinutes(3) > DateTime.Now) // It's already updating & less than 3 minutes has passed since API call
{
// Just wait for it to get automatically get updated in the threadpool. Return outdated data for now.
return(marketData.MarketCoins);
}
// Data is outdated & It's not updating yet || It's trying to update, it's been over 3 minutes, still nothing. Retry again. API Server is slow/down.
if (!marketData.CurrentlyUpdating)
{
marketData.CurrentlyUpdating = true;
_memoryCache.Set(Constant.Session.GlobalAllCoinsAPIData, marketData, TimeSpan.FromHours(1));
}
ThreadPool.QueueUserWorkItem(delegate
{
// Start an update process in the background.
MarketFetchData data = new MarketFetchData
{
MarketCoins = FetchAPILogic.GetAllCoinsFromApiAsync().Result,
LastUpdated = DateTime.Now
};
if (!data.MarketCoins.IsNullOrEmpty())
{
_memoryCache.Set(Constant.Session.GlobalAllCoinsAPIData, data, TimeSpan.FromHours(1));
}
});
}
// Fresh data
return(marketData.MarketCoins);
}
List <MarketCoin> fetchedCoins = await FetchAPILogic.GetAllCoinsFromApiAsync();
MarketFetchData newData = new MarketFetchData
{
MarketCoins = fetchedCoins,
LastUpdated = DateTime.Now
};
_memoryCache.Set(Constant.Session.GlobalAllCoinsAPIData, newData, TimeSpan.FromHours(1));
return(newData.MarketCoins);
}
//[TestMethod]
public void RefreshOfficialCoinsInDB()
{
List <LocalCoins.MarketCoin> fetchedCoins = FetchAPILogic.GetAllCoinsFromApiAsync().Result;
using (PegasunDBContext db = new PegasunDBContext())
{
List <OfficialCoins> existingOfficialCoins = db.OfficialCoins.ToList();
fetchedCoins.ForEach(x =>
{
if (!existingOfficialCoins.Any(o => o.Name == x.CoinMarketCapID))
{
db.OfficialCoins.Add(new OfficialCoins
{
Name = x.CoinMarketCapID,
Symbol = x.Symbol
});
}
});
db.SaveChanges();
}
}