public override void PopulateSymbols(DataSource ds, List <string> symbols)
{
if (string.IsNullOrEmpty(ds.Name))
{
return;
}
List <SymbolDescription> symbolsDescription = SymbolDescription.DeserializeList(ds.DSString);
var query = from description in symbolsDescription
select description.FullCode;
symbols.AddRange(query);
}
public override string ModifySymbols(DataSource ds, List <string> symbols)
{
List <SymbolDescription> symbolsDescription = SymbolDescription.DeserializeList(ds.DSString);
// Удаление инструментов
//
List <SymbolDescription> removeQuery = (from description in symbolsDescription
where !symbols.Exists(x => x == description.FullCode)
select description).ToList();
foreach (SymbolDescription description in removeQuery)
{
symbolsDescription.Remove(description);
}
// Добавление инструментов
//
var addQuery = from symbol in symbols
where !symbolsDescription.Exists(x => x.FullCode == symbol)
select symbol;
int errorsCount = 0;
foreach (string symbol in addQuery)
{
SymbolDescription description = GetSymbolDescription(symbol);
if (description != null)
{
symbolsDescription.Add(description);
}
else
{
errorsCount++;
}
}
if (errorsCount > 0)
{
MessageBox.Show(string.Format("В формате имени одного или нескольких инструментов была допущена ошибка. Всего ошибок: {0}.", errorsCount),
"Внимание!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
return(SymbolDescription.SerializeList(symbolsDescription));
}
public override Bars RequestData(DataSource ds, string symbol, DateTime startDate, DateTime endDate, int maxBars, bool includePartialBar)
{
Bars bars = new Bars(symbol, ds.Scale, ds.BarInterval);
List <SymbolDescription> symbolDescriptions = SymbolDescription.DeserializeList(ds.DSString);
SymbolDescription description = symbolDescriptions.Find(x => x.FullCode == symbol);
if (description != null && OnDemandUpdate)
{
_dataStore.LoadBarsObject(bars);
DateTime currentDate = DateTime.Now;
try
{
string suffix = GetSuffix(ds.BarDataScale);
int correction = 0;
bars.AppendWithCorrections(GetHistory(ds.BarDataScale, description.FullCode, suffix), out correction);
}
catch (Exception exception)
{
logger.Error(exception);
MessageBox.Show(string.Format("[{0}] {1}", symbol, exception.Message), "Внимание! Произошла ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
if (bars.Count > 0 && bars.Date[bars.Count - 1] > currentDate && !includePartialBar)
{
bars.Delete(bars.Count - 1);
}
if (!base.IsStreamingRequest)
{
lock (_locker)
_dataStore.SaveBarsObject(bars);
}
}
else
{
_dataStore.LoadBarsObject(bars, startDate, endDate, maxBars);
}
return(bars);
}
public override void UpdateProvider(IDataUpdateMessage dataUpdateMsg, List <DataSource> dataSources, bool updateNonDSSymbols, bool deleteNonDSSymbols)
{
foreach (BarDataScale scale in this._dataStore.GetExistingBarScales())
{
if (_cancelTokenSource != null && _cancelTokenSource.IsCancellationRequested)
{
dataUpdateMsg.DisplayUpdateMessage("Обновление провайдера отменено");
break;
}
dataUpdateMsg.DisplayUpdateMessage("Обновление таймфрейма " + scale.ToString());
var visibleSymbols = from dataSource in dataSources
where dataSource.BarDataScale == scale
select SymbolDescription.DeserializeList(dataSource.DSString);
List <SymbolDescription> symbols = new List <SymbolDescription>();
foreach (List <SymbolDescription> visibleSymbol in visibleSymbols)
{
symbols.AddRange(visibleSymbol);
}
if (updateNonDSSymbols)
{
var nonDSSymbols = from symbol in _dataStore.GetExistingSymbols(scale.Scale, scale.BarInterval)
where !symbols.Exists(x => x.FullCode == symbol)
select GetSymbolDescription(symbol);
symbols.AddRange(nonDSSymbols);
}
DataSource dsVirtual = new DataSource(this);
dsVirtual.Name = "VirtualDSr";
dsVirtual.BarDataScale = scale;
dsVirtual.DSString = SymbolDescription.SerializeList(symbols);
UpdateDataSource(dsVirtual, dataUpdateMsg);
if (deleteNonDSSymbols)
{
dataUpdateMsg.DisplayUpdateMessage("--------------");
dataUpdateMsg.DisplayUpdateMessage("Удаление истории инструментов не входящих ни в один набор данных данного таймфрейма:");
var nonDSSymbols = from symbol in _dataStore.GetExistingSymbols(scale.Scale, scale.BarInterval)
where !symbols.Exists(x => x.FullCode == symbol)
select symbol;
foreach (string symbol in nonDSSymbols)
{
lock (_locker)
_dataStore.RemoveFile(symbol, scale.Scale, scale.BarInterval);
dataUpdateMsg.DisplayUpdateMessage(string.Format("[DELETED] Инструмент {0} - История удалена", symbol));
}
if (nonDSSymbols.Count() == 0)
{
dataUpdateMsg.DisplayUpdateMessage(string.Format("[NA] Инструменты для удаления не найдены"));
}
}
dataUpdateMsg.DisplayUpdateMessage("--------------");
}
}
public override void UpdateDataSource(DataSource ds, IDataUpdateMessage dataUpdateMsg)
{
_cancelTokenSource = new CancellationTokenSource();
dataUpdateMsg.ReportUpdateProgress(0);
if (string.IsNullOrWhiteSpace(ds.DSString))
{
List <SymbolDescription> symbolDescriptions = (from symbol in ds.Symbols
select GetSymbolDescription(symbol)).ToList();
ds.DSString = SymbolDescription.SerializeList(symbolDescriptions);
}
List <SymbolDescription> updateRequired = (from description in SymbolDescription.DeserializeList(ds.DSString)
where UpdateRequired(description, ds.BarDataScale)
select description).ToList();
dataUpdateMsg.DisplayUpdateMessage(string.Format("Количество инструментов требующих обновления: {0}", updateRequired.Count));
if (updateRequired.Count > 0)
{
dataUpdateMsg.DisplayUpdateMessage("Запуск обновления инструментов:");
Task[] tasks = new Task[updateRequired.Count];
for (int i = 0; i < updateRequired.Count; i++)
{
dataUpdateMsg.DisplayUpdateMessage(string.Format("[START] Инструмент: {0} - Обновление запущено", updateRequired[i].FullCode));
tasks[i] = Task.Factory.StartNew((object updateRequiredSymbol) =>
{
string symbol = (string)updateRequiredSymbol;
DateTime currentDate = DateTime.Now;
Bars bars = new Bars(symbol, ds.Scale, ds.BarInterval);
_dataStore.LoadBarsObject(bars);
try
{
string suffix = GetSuffix(ds.BarDataScale);
int corrections = 0;
bars.AppendWithCorrections(GetHistory(ds.BarDataScale, symbol, suffix), out corrections);
if (bars.Count > 0 && bars.Date[bars.Count - 1] > currentDate)
{
bars.Delete(bars.Count - 1);
}
lock (_locker)
_dataStore.SaveBarsObject(bars);
dataUpdateMsg.DisplayUpdateMessage(string.Format("[COMPLETE] Инструмент: {0} - Обновление завершено", symbol));
}
catch (Exception exception)
{
logger.Error(exception);
dataUpdateMsg.DisplayUpdateMessage(string.Format("[ERROR] Инструмент {0} - {1}", symbol, exception.Message));
}
}, updateRequired[i].FullCode);
}
try
{
Task.WaitAll(tasks);
}
catch (AggregateException exception)
{
exception.Handle((inner) =>
{
if (inner is OperationCanceledException)
{
return(true);
}
else
{
logger.Error(inner);
return(false);
}
});
}
}
}