public bool ChangeStockPrice(string symbol, double newprice)
{
try
{
// trigger call to the subscribers
foreach (KeyValuePair <IStocksCallback, StockInfo> Pair in SubscriberList)
{
IStocksCallback icbChannel = Pair.Key;
if ((symbol == Pair.Value.Symbol) && (newprice > Pair.Value.Price))
{
StockInfo si = new StockInfo( );
si.Price = newprice;
si.Symbol = symbol;
si.STime = DateTime.Now;
if ((( ICommunicationObject )icbChannel).State == CommunicationState.Opened)
{
icbChannel.OnPriceChange(si);
}
}
}
}
catch (Exception ex)
{
throw new FaultException(ex.Message, new FaultCode("Change Price Error"));
}
return(true);
}
public bool UnsubscribeToStockPrice(string stocksym)
{
try
{
IStocksCallback callbackChannel = OperationContext.Current.GetCallbackChannel <IStocksCallback>( );
if (SubscriberList.ContainsKey(callbackChannel) == true)
{
SubscriberList.Remove(callbackChannel);
}
}
catch (Exception ex)
{
throw new FaultException(ex.Message, new FaultCode("Unsubcription Error"));
}
return(true);
}
public bool SubscribeToStockPrice(string stocksym, double triggerPrice)
{
try
{
IStocksCallback callbackChannel = OperationContext.Current.GetCallbackChannel <IStocksCallback>( );
if (SubscriberList.ContainsKey(callbackChannel) == false)
{
SubscriberList.Add(callbackChannel, new StockInfo()
{
Symbol = stocksym,
Price = triggerPrice,
STime = DateTime.Now
});
}
}
catch (Exception ex)
{
throw new FaultException(ex.Message, new FaultCode("Subscription Error"));
}
return(true);
}
