public async Task <CurrenciesServiceResponse> GetCurrenciesAsync(CancellationToken cancellationToken)
{
List <object> cacheKeyList = new List <object>();
cacheKeyList.Add("GetCurrenciesAsync");
string cacheKey = string.Join(":", cacheKeyList);
CurrenciesServiceResponse data = (CurrenciesServiceResponse)cache.Get(cacheKey);
if (data == null)
{
await Settings.CurrenciesServiceLock.WaitAsync();
try
{
data = (CurrenciesServiceResponse)cache.Get(cacheKey);
if (data == null)
{
string responseString = "";
if (_dataPath != "" && File.Exists(_dataPath + Settings.CurrenciesServiceFileName))
{
var path = _dataPath + Settings.CurrenciesServiceFileName;
responseString = File.ReadAllText(path);
}
else
{
var variables = new Dictionary <string, string>();
variables.Add("{apiKey}", ApiKey());
var URL = Settings.CurrenciesServiceURL.ReplaceFromDictionary(variables);
var response = await WebRequestHelper.GetAsync(URL, WebRequestHelper.ResponseAcceptType.JSON, cancellationToken);
responseString = response.Item1.BytesToString();
try
{
if (_dataPath != "")
{
File.WriteAllText(_dataPath + Settings.CurrenciesServiceFileName, responseString);
}
}
catch
{
}
}
data = JsonConvert.DeserializeObject <CurrenciesServiceResponse>(responseString);
cacheCurrencies(data, cancellationToken);
}
}
finally
{
Settings.CurrenciesServiceLock.Release();
}
}
return(data);
}
private void cacheCurrencies(CurrenciesServiceResponse data, CancellationToken cancellationToken)
{
List <object> cacheKeyList = new List <object>();
cacheKeyList.Add("GetCurrenciesAsync");
string cacheKey = string.Join(":", cacheKeyList);
CacheItemPolicy policy = new CacheItemPolicy();
policy.AbsoluteExpiration = new DateTimeOffset(DateTime.Now.AddMinutes(Settings.CurrenciesServiceCacheExpiration));
cache.Add(cacheKey, data, policy);
foreach (Currency currency in data.Currencies)
{
cache.Add("currency:" + currency.Code, currency, policy);
}
}
