private void Subscribe(string ticker)
{
if (!_subscriptions.ContainsKey(ticker))
{
var observer = new InstrumentPriceObserver();
observer.OnPriceReceived += OnPriceReceived;
var subscription = _priceSource.Subscribe(ticker, observer);
_subscriptions.Add(ticker, subscription);
}
}
static void Main(string[] args)
{
IInstrumentFactory instrumentFactory = new InstrumentsProvider();
IProvidePriceGenerator priceGeneratorProvider = new PriceGeneratorProvider(instrumentFactory);
ISourcePrice priceSource = new CompositePriceSource(instrumentFactory, priceGeneratorProvider);
// start source
priceSource.Start();
var priceObserver = new InstrumentPriceObserver();
priceObserver.OnPriceReceived += OnPriceReceived;
var subscription1 = priceSource.Subscribe("AAPL", priceObserver);
var subscription2 = priceSource.Subscribe("MSFT", priceObserver);
var subscription3 = priceSource.Subscribe("GOOG", priceObserver);
Console.ReadKey();
subscription1.Dispose();
subscription2.Dispose();
subscription3.Dispose();
priceSource.Stop();
}