private async Task <LatestFetch> Fetch()
{
var previous = _Latest;
var fetch = new LatestFetch();
try
{
var rates = await _Inner.GetRatesAsync();
fetch.Latest = rates;
fetch.Expiration = DateTimeOffset.UtcNow + ValidatyTime;
fetch.NextRefresh = DateTimeOffset.UtcNow + RefreshRate;
}
catch (Exception ex)
{
if (previous != null)
{
fetch.Latest = previous.Latest;
fetch.Expiration = previous.Expiration;
}
else
{
fetch.Expiration = DateTimeOffset.UtcNow;
}
fetch.NextRefresh = DateTimeOffset.UtcNow;
fetch.Exception = ex;
}
_Latest = fetch;
fetch.GetResult(); // Will throw if not valid
return(fetch);
}
public Task <ICollection <Rate> > GetRatesAsync()
{
return(_MemoryCache.GetOrCreateAsync("GLOBAL_RATES", (ICacheEntry entry) =>
{
entry.AbsoluteExpiration = DateTimeOffset.UtcNow + CacheSpan;
return _Inner.GetRatesAsync();
}));
}
public async Task <DataWrapper <NBitpayClient.Rate[]> > GetRates()
{
var allRates = (await _RateProvider.GetRatesAsync());
return(new DataWrapper <NBitpayClient.Rate[]>
(allRates.Select(r =>
new NBitpayClient.Rate()
{
Code = r.Currency,
Name = _CurrencyNameTable.GetCurrencyData(r.Currency)?.Name,
Value = r.Value
}).Where(n => n.Name != null).ToArray()));
}
public async Task <ICollection <Rate> > GetRatesAsync()
{
List <Rate> rates = new List <Rate>();
foreach (var rate in await rateProvider.GetRatesAsync())
{
var localRate = rate.Value;
foreach (var rule in rateRules)
{
localRate = rule.Apply(network, localRate);
}
rates.Add(new Rate(rate.Currency, localRate));
}
return(rates);
}
public async Task <PairRate[]> GetRatesAsync(CancellationToken cancellationToken)
{
DateTimeOffset now = DateTimeOffset.UtcNow;
try
{
return(await _inner.GetRatesAsync(cancellationToken));
}
catch (Exception ex)
{
Exception = ex;
return(Array.Empty <PairRate>());
}
finally
{
Latency = DateTimeOffset.UtcNow - now;
}
}
public async Task <ExchangeRates> GetRatesAsync(CancellationToken cancellationToken)
{
DateTimeOffset now = DateTimeOffset.UtcNow;
try
{
return(await _inner.GetRatesAsync(cancellationToken));
}
catch (Exception ex)
{
Exception = ex;
return(new ExchangeRates());
}
finally
{
Latency = DateTimeOffset.UtcNow - now;
}
}
public Task <ExchangeRates> GetRatesAsync()
{
DateTimeOffset now = DateTimeOffset.UtcNow;
try
{
return(_inner.GetRatesAsync());
}
catch (Exception ex)
{
Exception = ex;
return(Task.FromResult(new ExchangeRates()));
}
finally
{
Latency = DateTimeOffset.UtcNow - now;
}
}
private async Task <LatestFetch> Fetch(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var previous = _Latest;
var fetch = new LatestFetch();
fetch.ExchangeName = ExchangeName;
try
{
var rates = await _Inner.GetRatesAsync(cancellationToken);
fetch.Latest = rates;
fetch.Updated = DateTimeOffset.UtcNow;
fetch.Expiration = fetch.Updated + ValidatyTime;
fetch.NextRefresh = fetch.Updated + RefreshRate;
}
catch (Exception ex)
{
if (previous != null)
{
fetch.Latest = previous.Latest;
fetch.Expiration = previous.Expiration;
fetch.Backoff = previous.Backoff * 2;
if (fetch.Backoff > MaxBackoff)
{
fetch.Backoff = MaxBackoff;
}
}
else
{
fetch.Expiration = DateTimeOffset.UtcNow;
}
fetch.NextRefresh = DateTimeOffset.UtcNow + fetch.Backoff;
fetch.Exception = ex;
}
_Latest = fetch;
fetch.GetResult(); // Will throw if not valid
return(fetch);
}
private async Task <LatestFetch> Fetch()
{
var fetch = new LatestFetch();
try
{
var rates = await _Inner.GetRatesAsync();
fetch.Latest = rates;
}
catch (Exception ex)
{
fetch.Exception = ex;
}
fetch.Timestamp = DateTimeOffset.UtcNow;
_Latest = fetch;
if (fetch.Exception != null)
{
ExceptionDispatchInfo.Capture(fetch.Exception).Throw();
}
return(fetch);
}
