public void SubscribeStatistics(Action <StatisticsEventArgs> callback, Action <Exception> exception, CancellationToken cancellationToken)
{
try
{
var symbolStatisticsCache = new SymbolStatisticsCache(binanceApi, new SymbolStatisticsWebSocketClient());
symbolStatisticsCache.Subscribe(e =>
{
if (cancellationToken.IsCancellationRequested)
{
symbolStatisticsCache.Unsubscribe();
return;
}
try
{
var symbolsStats = e.Statistics.Select(s => NewSymbolStats(s)).ToList();
callback.Invoke(new StatisticsEventArgs {
Statistics = symbolsStats
});
}
catch (Exception ex)
{
symbolStatisticsCache.Unsubscribe();
exception.Invoke(ex);
}
});
}
catch (Exception ex)
{
exception.Invoke(ex);
}
}
public Task SubscribeStatistics(Action <StatisticsEventArgs> callback, Action <Exception> exception, CancellationToken cancellationToken)
{
var tcs = new TaskCompletionSource <object>();
var binanceApi = new BinanceApi();
var symbolStatisticsCache = new SymbolStatisticsCache(binanceApi, new SymbolStatisticsWebSocketClient());
symbolStatisticsCache.Subscribe(e =>
{
if (cancellationToken.IsCancellationRequested)
{
symbolStatisticsCache.Unsubscribe();
return;
}
var symbolsStats = e.Statistics.Select(s => NewSymbolStats(s)).ToList();
try
{
callback.Invoke(new StatisticsEventArgs {
Statistics = symbolsStats
});
}
catch (Exception ex)
{
symbolStatisticsCache.Unsubscribe();
exception.Invoke(ex);
return;
}
});
tcs.SetResult(null);
return(tcs.Task);
}
public void Unsubscribe()
{
var api = new Mock <IBinanceApi>().Object;
var client = new Mock <ISymbolStatisticsClient>().Object;
var cache = new SymbolStatisticsCache(api, client);
// Can call unsubscribe before subscribe or multiple times without fail.
cache.Unsubscribe();
cache.Unsubscribe();
}
public void SubscribeThrows()
{
var api = new Mock <IBinanceApi>().Object;
var client = new Mock <ISymbolStatisticsClient>().Object;
var cache = new SymbolStatisticsCache(api, client);
cache.Subscribe();
Assert.Throws <InvalidOperationException>(() => cache.Subscribe());
}
public void LinkToClient()
{
var api = new Mock <IBinanceApi>().Object;
var client1 = new Mock <ISymbolStatisticsClient>().Object;
var client2 = new SymbolStatisticsClient();
var symbol1 = Symbol.BTC_USDT;
var symbol2 = Symbol.LTC_BTC;
client2.Subscribe(symbol1);
var clientSubscribeStreams = client2.SubscribedStreams.ToArray();
Assert.Equal(SymbolStatisticsClient.GetStreamName(symbol1), clientSubscribeStreams.Single());
var cache = new SymbolStatisticsCache(api, client1)
{
Client = client2 // link client.
};
// Client subscribed streams are unchanged after link to unsubscribed cache.
Assert.Equal(clientSubscribeStreams, client2.SubscribedStreams);
cache.Client = client1; // unlink client.
// Subscribe cache to symbol.
cache.Subscribe(symbol2);
// Cache is subscribed to symbol.
Assert.Equal(SymbolStatisticsClient.GetStreamName(symbol2), cache.SubscribedStreams.Single());
cache.Client = client2; // link to client.
// Client has second subscribed stream from cache.
Assert.True(client2.SubscribedStreams.Count() == 2);
Assert.Contains(SymbolStatisticsClient.GetStreamName(symbol2), client2.SubscribedStreams);
}
