public ElementWrapper[] SelectElements(ElementTypeDefs itemsTypes)
{
String cacheItemKey = String.Format("[SelectElements][{0}]", itemsTypes.ToString());
selectElementsLock.AcquireReaderLock(dataProviderLockTimeout);
ElementWrapper[] result = null;
try
{
result = (ElementWrapper[])DataCache.Instance.Get(cacheItemKey);
if (null == result)
{
//////////////////////////////////////////////////////////////////
/// no data in cache - need to load it, but first check it again
///
LockCookie lockCookie = selectElementsLock.UpgradeToWriterLock(dataProviderLockTimeout);
try
{
result = (ElementWrapper[])DataCache.Instance.Get(cacheItemKey);
if (null == result)
{
Element[] elements = (new ItemsDataProvider()).GetElementsByType(itemsTypes);
if (LoggerFactory.AppLogger.IsTraceEnabled)
{
LoggerFactory.AppLogger.Trace("[DataProviderProxy.SelectElements] Loaded elements " + elements.Length);
}
result = WrapperUtilities.Convert(elements);
DataCache.Instance.Add(cacheItemKey, result);
}
}
finally
{
selectElementsLock.DowngradeFromWriterLock(ref lockCookie);
}
}
}
finally
{
selectElementsLock.ReleaseReaderLock();
}
return(result);
}
public ElementDailyDataRange SelectDailyData(String ticker)
{
String cacheItemKey = String.Format("[SelectDailyData][{0}]", ticker);
selectDailyDataLock.AcquireReaderLock(dataProviderLockTimeout);
ElementDailyDataRange result = null;
try
{
result = (ElementDailyDataRange)DataCache.Instance.Get(cacheItemKey);
if (null == result)
{
//////////////////////////////////////////////////////////////////
/// no data in cache - need to load it, but first check it again
///
LockCookie lockCookie = selectDailyDataLock.UpgradeToWriterLock(dataProviderLockTimeout);
try
{
result = (ElementDailyDataRange)DataCache.Instance.Get(cacheItemKey);
if (null == result)
{
DailyData[] tempRes = (new ItemsDataProvider()).LoadItemDailyData(ticker);
if (tempRes.Length > 0)
{
result = new ElementDailyDataRange(ticker, WrapperUtilities.Convert(tempRes), tempRes[0].Day, tempRes[tempRes.Length - 1].Day);
if (LoggerFactory.AppLogger.IsTraceEnabled)
{
LoggerFactory.AppLogger.Trace("[DataProviderProxy.SelectDailyData] Loaded records for " + ticker + " " + tempRes.Length + " " + result.DateFrom + " " + result.DateTo);
}
DataCache.Instance.Add(cacheItemKey, result);
}
else
{
LoggerFactory.AppLogger.Warn("[DataProviderProxy.SelectDailyData] No data for " + ticker);
result = new ElementDailyDataRange(ticker, EmptyArrayTemplate <DailyDataWrapper> .Instance, DateTime.MaxValue, DateTime.MaxValue);
//////////////////////////////////////////////////////
/// do not add empty item to cache
///
}
}
}
finally
{
selectDailyDataLock.DowngradeFromWriterLock(ref lockCookie);
}
}
}
finally
{
selectDailyDataLock.ReleaseReaderLock();
}
return(result);
}