public IDisposable Subscribe(IStockObserver observer)
{
if (!_observers.Contains(observer))
{
_observers.Add(observer);
}
return(new Unsubscriber(_observers, observer));
}
private void StockTicker_Load(object sender, EventArgs e)
{
//resolve and instintiate type using Unity
Investor = container.Resolve <StockInvestor>("Investor1");
//resolve and instintiate type using Unity
WatchedStocks = container.Resolve <StockPriceService>();
(Investor as StockInvestor).OnPriceChange += OnPriceChange;
}
public StartUp()
{
IUnityContainer unitycontainer = new UnityContainer();
unitycontainer.RegisterType <IMailMessageFactory, MailMessageFactory>();
unitycontainer.RegisterType <ISmtpClientFactory, SmtpClientFactory>();
unitycontainer.RegisterType <IEmailAlertService, EmailAlertService>();
unitycontainer.RegisterType <INotificationService, NotificationService>();
unitycontainer.RegisterType <IStockObserver, StockObserver>();
_notificationService = unitycontainer.Resolve <NotificationService>();
_stockObserver = unitycontainer.Resolve <StockObserver>();
}
public void Subscribe(IStockObserver observer, string Stock)
{
//if the investor just subscribed, then add it to the dictionary with the desired stcik
if (!InvestorsMap.ContainsKey(observer))
{
var InvestorList = new List <string>();
InvestorList.Add(Stock);
InvestorsMap.Add(observer, InvestorList);
}
else //the investor already subscribed for another stock, just add it to the new one.
{
//make sure the investor is not already subscribed
if (!InvestorsMap[observer].Contains(Stock))
{
InvestorsMap[observer].Add(Stock);
}
}
}
//unsubscribe from all stocks and stop receiving notificatins
public void Unsubscribe(IStockObserver observer)
{
InvestorsMap.Remove(observer);
}
//unsubscribe from one stock only
public void Unsubscribe(IStockObserver observer, string Stock)
{
throw new NotImplementedException();
}
public Task UnsubscribeForUpdates( IStockObserver subscriber )
{
this.subscribers.Unsubscribe( subscriber );
return TaskDone.Done;
}
public void RemoveObserver(IStockObserver observer)
{
investors.Remove(observer);
}
public void AddObserver(IStockObserver observer)
{
investors.Add(observer);
}
public void UnRegister(IStockObserver observer)
{
_observers.Remove(observer);
}
public void Register(IStockObserver observer)
{
_observers.Add(observer);
}
public void Detach(IStockObserver observer)
{
lstObservers.Remove(observer);
}
public void Attach(IStockObserver observer)
{
lstObservers.Add(observer);
}
public Unsubscriber(List <IStockObserver> observers, IStockObserver observer)
{
_observers = observers;
_observer = observer;
}
