static async Task Run()
{
var connection = new HubConnectionBuilder()
.WithUrl("http://localhost:5000/signalr")
.WithConsoleLogger()
.WithMessagePackProtocol()
.WithTransport(TransportType.WebSockets)
.Build();
await connection.StartAsync();
Console.WriteLine("Starting connection. Press Ctrl-C to close.");
var cts = new CancellationTokenSource();
Console.CancelKeyPress += (sender, a) =>
{
a.Cancel = true;
cts.Cancel();
};
connection.Closed += e =>
{
Console.WriteLine("Connection closed with error: {0}", e);
cts.Cancel();
return(Task.CompletedTask);
};
connection.On("marketOpened", async() =>
{
await StartStreaming();
});
// Do an initial check to see if we can start streaming the stocks
var state = await connection.InvokeAsync <string>("GetMarketState");
if (string.Equals(state, "Open"))
{
await StartStreaming();
}
// Keep client running until cancel requested.
while (!cts.IsCancellationRequested)
{
await Task.Delay(250);
}
async Task StartStreaming()
{
var channel = connection.Stream <Stock>("StreamStocks", CancellationToken.None);
while (await channel.WaitToReadAsync() && !cts.IsCancellationRequested)
{
while (channel.TryRead(out var stock))
{
Console.WriteLine($"{stock.Symbol} {stock.Price}");
}
}
}
}