public bool UnSubscribeToStockPrice(string stocksym)
{
try
{
IStockCallback callbackChannel = OperationContext.Current.GetCallbackChannel <IStockCallback>();
SubscribeInfo subToRemove = null;
foreach (SubscribeInfo sub in SubscriberList)
{
if (sub.ChannelToClient == callbackChannel) //found subscriber
{
sub.RemoveSymbol(stocksym);
if (sub.GetNumOfSymbolsSubscribed() == 0)
{
subToRemove = sub;
}
}
}
if (subToRemove != null)
{
SubscriberList.Remove(subToRemove);
}
}
catch (Exception ex)
{
throw new FaultException(ex.Message, new FaultCode("UnSubscription Error"));
}
return(true);
}
public bool SubscribeToStockPrice(string stocksym, double triggerPrice)
{
try
{
IStockCallback callbackChannel = OperationContext.Current.GetCallbackChannel <IStockCallback>();
bool ifNewSubscriber = true;
foreach (SubscribeInfo sub in SubscriberList)
{
if (sub.ChannelToClient == callbackChannel) //found subscriber
{
ifNewSubscriber = false;
sub.AddSymbol(stocksym, triggerPrice);
}
}
if (ifNewSubscriber)
{
SubscribeInfo subscriber = new SubscribeInfo();
SubscriberList.Add(subscriber);
subscriber.ChannelToClient = callbackChannel;
subscriber.AddSymbol(stocksym, triggerPrice);
}
}
catch (Exception ex)
{
throw new FaultException(ex.Message, new FaultCode("Subscription Error"));
}
return(true);
}