private void LookupStockPrice(RefreshStockPriceMessage message)
{
var latestPrice = StockPriceServiceGateway.GetLatestPrice(message.StockSymbol);
//response
Sender.Tell(new UpdatedStockPriceMessage(latestPrice, DateTime.Now));
}
public static IAgent <StockAgentMessage> Create(string stockSymbol)
{
// Start price lookup child actor
var gateWay = new RandomStockPriceServiceGateway();
var priceLookupChild = StockPriceLookupActor.Create(gateWay);
// Start Price actor
var self = Agent.Start <HashSet <IAgent <ChartSeriesMessage> >, StockAgentMessage>(
new HashSet <IAgent <ChartSeriesMessage> >(), async(subscribers, message) =>
{
switch (message)
{
case SubscribeToNewStockPricesMessage msg:
subscribers.Add(msg.Subscriber);
return(subscribers);
case UnSubscribeFromNewStockPricesMessage msg:
subscribers.Remove(msg.Subscriber);
return(subscribers);
case RefreshStockPriceMessage msg:
var request = new RefreshStockPriceMessage(msg.StockSymbol);
var updatedPriceMsg = await priceLookupChild.Ask(request);
var stockPriceMessage = new StockPriceMessage(
msg.StockSymbol, updatedPriceMsg.Price, updatedPriceMsg.Date);
foreach (var subscriber in subscribers)
{
subscriber.Post(stockPriceMessage);
}
return(subscribers);
default:
throw new ArgumentException(
message: "message is not a recognized",
paramName: nameof(message));
}
});
// Start timer that trigger refresh events (just to avoid dependency on Rx)
Timer timer = new Timer(75);
var refreshMsg = new RefreshStockPriceMessage(stockSymbol);
timer.AutoReset = true;
timer.Elapsed += (sender, e) => self.Post(refreshMsg);
timer.Start();
// TODO: Ideally we have to stop and dispose timer
return(self);
}
/// <summary>
/// Looks up a stock price.
/// </summary>
/// <param name="message"></param>
private void LookupStockPrice(RefreshStockPriceMessage message)
{
var latestPrice = this._stockPriceServiceGateway.GetLatestPrice(message.StockSymbol);
this.Sender.Tell(new UpdatedStockPriceMessage(latestPrice));
}
