/// <summary>
/// must be called from a synchronized statement
/// </summary>
/// <param name="source"></param>
/// <param name="dest"></param>
/// <param name="newq"></param>
/// <returns></returns>
private void UpdateCache(TimedQuote newq)
{
if (newq.Midpoint == 0)
{
return;
}
var source = newq.BaseCurrency;
var dest = newq.QuoteCurrency;
if (quotes.ContainsKey(source))
{
if (quotes[source].ContainsKey(dest))
{
var existing = quotes[source][dest];
if (existing.UpdatedAtUTC < newq.UpdatedAtUTC)
{
existing.UpdatedAtUTC = DateTime.UtcNow;
existing.Midpoint = newq.Midpoint;
}
}
else
{
quotes[source].Add(dest, newq);
}
}
else
{
quotes.Add(source, new Dictionary <Currencies, TimedQuote>());
quotes[source].Add(dest, newq);
}
}
/// <summary>
/// <inheritdoc/>
/// </summary>
/// <param name="source"><inheritdoc/></param>
/// <param name="dest"><inheritdoc/></param>
/// <param name="convStatus"><inheritdoc/></param>
/// <returns><inheritdoc/></returns>
public virtual TimedQuote GetQuote(Currencies source, Currencies dest, ConversionBag convStatus)
{
if (source == dest)
{
return new TimedQuote()
{
BaseCurrency = source, Midpoint = 1, QuoteCurrency = dest, UpdatedAtUTC = DateTime.UtcNow.AddYears(1)
}
}
;
if (CanConvert(source, dest, convStatus) == true)
{
TimedQuote quote = getQuote(source, dest, convStatus);
if (quote != null && quote.UpdatedAtUTC.AddMilliseconds(ConversionProviderFactory.QuotesValidForMillis) >= DateTime.UtcNow)
{
if (this is CacheConversionProvider == false) // if the provider who got us the quote is not the cache provider
{
ConversionProviderFactory.AddToCache(quote, quote.UpdatedAtUTC); // add the quote to the cache
}
return(quote);
}
}
if (TryNext == false)
{
return(null);
}
return(ConversionProviderFactory.GetNext(this)?.GetQuote(source, dest, convStatus));
}
public void UpdateCache(Quote quote, DateTime updatedAtUtc)
{
if (quote.Midpoint == 0)
{
return;
}
var source = quote.BaseCurrency;
var dest = quote.QuoteCurrency;
lock (sync)
{
// add or update the quote
var newq = new TimedQuote()
{
BaseCurrency = source, QuoteCurrency = dest, Midpoint = quote.Midpoint, UpdatedAtUTC = updatedAtUtc
};
UpdateCache(newq);
// add or update the opposite quote
newq = new TimedQuote()
{
BaseCurrency = dest, QuoteCurrency = source, Midpoint = 1 / quote.Midpoint, UpdatedAtUTC = updatedAtUtc
};
UpdateCache(newq);
}
}
