IObservable <DrasticChange> GetTicksQuery(IStockTicker ticker)
{
IObservable <StockTick> ticks =
Observable.FromEventPattern <EventHandler <StockTick>, StockTick>(
h => ticker.StockTick += h,
h => ticker.StockTick -= h)
.Select(tickEvent => tickEvent.EventArgs)
.Synchronize();
var drasticChanges =
from tick in ticks
group tick by tick.QuoteSymbol
into company
from tickPair in company.Buffer(2, 1)
let changeRatio = Math.Abs((tickPair[1].Price - tickPair[0].Price) / tickPair[0].Price)
where changeRatio > maxChangeRatio
select new DrasticChange()
{
Symbol = company.Key,
ChangeRatio = changeRatio,
OldPrice = tickPair[0].Price,
NewPrice = tickPair[1].Price
};
return(drasticChanges);
}
public StockMonitor(IStockTicker ticker)
{
const decimal maxChangeRatio = 0.1m;
//creating an observable from the StockTick event, each notification will carry only the eventargs and will be synchronized
IObservable <StockTick> ticks =
Observable.FromEventPattern <EventHandler <StockTick>, StockTick>(
h => ticker.StockTick += h,
h => ticker.StockTick -= h)
.Select(tickEvent => tickEvent.EventArgs)
.Synchronize();
DrasticChanges =
from tick in ticks
group tick by tick.QuoteSymbol
into company
from tickPair in company.Buffer(2, 1)
let changeRatio = Math.Abs((tickPair[1].Price - tickPair[0].Price) / tickPair[0].Price)
where changeRatio > maxChangeRatio
select new DrasticChange()
{
Symbol = company.Key,
ChangeRatio = changeRatio,
OldPrice = tickPair[0].Price,
NewPrice = tickPair[1].Price
};
}
IObservable <DrasticChange> GetTicksMethod(IStockTicker ticker)
{
return(Observable.FromEventPattern <EventHandler <StockTick>, StockTick>(
h => ticker.StockTick += h,
h => ticker.StockTick -= h)
.Select(tickEvent => tickEvent.EventArgs)
.Synchronize()
.GroupBy(tick => tick.QuoteSymbol) //groups emits by ticker
.SelectMany(t => t)
.Buffer(2, 1)
.Select(l =>
new
{
symbol = l[0].QuoteSymbol,
changeRatio = Math.Abs(l[1].Price - l[0].Price),
oldPrice = l[0].Price,
newPrice = l[1].Price
})
.Where(cr => cr.changeRatio > maxChangeRatio)
.Select(cr => new DrasticChange()
{
Symbol = cr.symbol,
ChangeRatio = cr.changeRatio,
OldPrice = cr.oldPrice,
NewPrice = cr.newPrice
}));
}
public StockTickerHub(IStockTicker stockTicker)
{
if (stockTicker == null)
{
throw new ArgumentNullException("stockTicker");
}
_stockTicker = stockTicker;
}
public RxStockMonitor(IStockTicker ticker)
{
// var ticks = GetTicksQuery(ticker);
var ticks = GetTicksMethod(ticker);
subscription =
ticks.Subscribe(change =>
{
Console.WriteLine("Stock:{0} has changed with {1} ratio, Old Price:{2} New Price:{3}", change.Symbol,
change.ChangeRatio,
change.OldPrice,
change.NewPrice);
},
ex => { Console.WriteLine($"Error {ex.Message}"); }, //#C
() => { Console.WriteLine("Finished"); }); //#C
}
static void Main(string[] args)
{
string baseAddress = "soap.udp://224.0.0.1:40000";
UdpBinding myBinding = new UdpBinding();
ChannelFactory <IStockTicker> factory = new ChannelFactory <IStockTicker>(myBinding, new EndpointAddress(baseAddress));
IStockTicker proxy = factory.CreateChannel();
while (true)
{
// This will continue to mulicast stock information
proxy.SendStockInfo(GetStockInfo());
int x = proxy.ResponseStockInfo(GetStockInfo());
Console.WriteLine(String.Format("sent stock info at {0}, the cound is {1}", DateTime.Now, x));
// Wait for one second before sending another update
System.Threading.Thread.Sleep(new TimeSpan(0, 0, 1));
}
}
public RxStockMonitor(IStockTicker ticker)
{
const decimal maxChangeRatio = 0.1m;
//creating an observable from the StockTick event, each notification will carry only the eventargs and will be synchronized
IObservable <StockTick> ticks =
Observable.FromEventPattern <EventHandler <StockTick>, StockTick>(
h => ticker.StockTick += h,
h => ticker.StockTick -= h)
.Select(tickEvent => tickEvent.EventArgs)
.Synchronize();
var drasticChanges =
from tick in ticks
group tick by tick.QuoteSymbol
into company
from tickPair in company.Buffer(2, 1)
let changeRatio = Math.Abs((tickPair[1].Price - tickPair[0].Price) / tickPair[0].Price)
where changeRatio > maxChangeRatio
select new DrasticChange()
{
Symbol = company.Key,
ChangeRatio = changeRatio,
OldPrice = tickPair[0].Price,
NewPrice = tickPair[1].Price
};
DrasticChanges = drasticChanges;
_subscription =
drasticChanges.Subscribe(change =>
{
Console.WriteLine("Stock:{0} has changed with {1} ratio, Old Price:{2} New Price:{3}", change.Symbol,
change.ChangeRatio,
change.OldPrice,
change.NewPrice);
},
ex => { /* code that handles erros */ }, //#C
() => { /* code that handles the observable completenss */ }); //#C
}
public RxStockMonitor(IStockTicker ticker)
{
const decimal maxChangeRatio = 0.1m;
//creating an observable from the StockTick event, each notification will carry only the eventargs and will be synchronized
IObservable<StockTick> ticks =
Observable.FromEventPattern<EventHandler<StockTick>, StockTick>(
h => ticker.StockTick += h,
h => ticker.StockTick -= h)
.Select(tickEvent => tickEvent.EventArgs)
.Synchronize();
var drasticChanges =
from tick in ticks
group tick by tick.QuoteSymbol
into company
from tickPair in company.Buffer(2, 1)
let changeRatio = Math.Abs((tickPair[1].Price - tickPair[0].Price) / tickPair[0].Price)
where changeRatio > maxChangeRatio
select new DrasticChange()
{
Symbol = company.Key,
ChangeRatio = changeRatio,
OldPrice = tickPair[0].Price,
NewPrice = tickPair[1].Price
};
DrasticChanges = drasticChanges;
_subscription =
drasticChanges.Subscribe(change =>
{
Console.WriteLine("Stock:{0} has changed with {1} ratio, Old Price:{2} New Price:{3}", change.Symbol,
change.ChangeRatio,
change.OldPrice,
change.NewPrice);
},
ex => { /* code that handles erros */}, //#C
() => {/* code that handles the observable completenss */}); //#C
}
public StockTickerHub(IStockTicker stockTicker)
{
_stockTicker = stockTicker;
}
public StockQuoteHub(IStockTicker stockTicker)
{
_stockTicker = stockTicker;
}
//public StockTickerHub() :
// this(StockTicker.Instance)
//{
//}
public StockTickerHub(IStockTicker stockTicker, ILifetimeScope lifetimeScope)
{
_stockTicker = stockTicker;
_lifetimeScope = lifetimeScope.BeginLifetimeScope();
}
//Remove this constructor
//public StockTickerHub() : this(StockTicker.Instance) { }
//Changing this to the interface
public StockTickerHub(IStockTicker stockTicker)
{
_stockTicker = stockTicker;
}
