public static IList <CountryData> GetData()
{
lock (countryData)
{
if (countryData.Count == 0)
{
if (CacheFilePath != null && File.Exists(CacheFilePath) && File.GetLastWriteTime(CacheFilePath).Date == DateTime.Today && false)
{
using (var jtr = new JsonTextReader(new StreamReader(CacheFilePath)))
{
var js = new JsonSerializer();
foreach (var item in js.Deserialize <CountryData[]>(jtr))
{
countryData.TryAdd(item.ID, item);
}
}
}
else
{
var lastYear = DateTime.Today.Year - 1;
var firstYear = lastYear - 5;
string gdpServiceUrl = String.Format(indicatorServiceUrl, Indicators.Gdp, firstYear, lastYear);
string gdpGrowthServiceUrl = String.Format(indicatorServiceUrl, Indicators.GdpGrowthRate, firstYear, lastYear);
string gniPerCapitaServiceUrl = String.Format(indicatorServiceUrl, Indicators.GniPerCapita, firstYear, lastYear);
Parallel.Invoke(new Action[] {
() => { FetchIndicator(gdpServiceUrl, (c, v) => { c.GDP = v; }); },
() => { FetchIndicator(gdpGrowthServiceUrl, (c, v) => { c.GDPGrowth = v; }); },
() => { FetchIndicator(gniPerCapitaServiceUrl, (c, v) => { c.GniPerCapita = v; }); }
});
var maxYear = countryData.Max(a => a.Value.Year);
var minYear = countryData.Min(a => a.Value.Year);
if (maxYear == lastYear)
{
CountryData cData = null;
foreach (var item in countryData.Where(a => a.Value.Year == minYear))
{
countryData.TryRemove(item.Key, out cData);
}
}
if (CacheFilePath != null)
{
//Cache data on disk
using (var jtw = new JsonTextWriter(new StreamWriter(CacheFilePath)))
{
var js = new JsonSerializer();
js.Serialize(jtw, countryData.Values);
}
}
}
}
return(countryData.Values.ToArray());
}
}
public void Process(int lastYear, CountryData rec)
{
var index = lastYear - rec.Year;
if (index >= 5)
return;
GDP[index] = rec.GDP;
GDPGrowth[index] = rec.GDPGrowth;
GNIPC[index] = rec.GniPerCapita;
}