public Task Subscribe(ICalculatorObserver observer)
{
if (!this.observers.IsSubscribed(observer))
{
observers.Subscribe(observer);
}
return(Task.FromResult(0));
}
private static async Task StaySubscribed(ICalculatorGrain grain, ICalculatorObserver observer, CancellationToken token)
{
while (!token.IsCancellationRequested)
{
try
{
await Task.Delay(TimeSpan.FromSeconds(5), token);
await grain.Subscribe(observer);
}
catch (Exception exception)
{
Console.WriteLine($"Exception while trying to subscribe for updates: {exception}");
}
}
}
public Task Subscribe(ICalculatorObserver observer)
{
observers.Subscribe(observer);
return(Task.FromResult(0));
}
public Task Subscribe(ICalculatorObserver observer)
{
_observers.Subscribe(observer);
return(Task.CompletedTask);
}
