public static IDisposable When <T>(Action <T> when, bool includeTracing = true) where T : class
{
var eventsObserver = new ImmediateEventsObserver();
Action <ISystemEvent> onEvent = @event =>
{
var type = @event as T;
if (type != null)
{
when(type);
}
};
eventsObserver.Event += onEvent;
var list = new List <IObserver <ISystemEvent> >
{
eventsObserver
};
if (includeTracing)
{
list.Add(new ImmediateTracingObserver());
}
var old = SystemObserver.Swap(list.ToArray());
return(new Disposable(() =>
{
SystemObserver.Swap(old);
eventsObserver.Event -= onEvent;
}));
}
public static IDisposable When <T>(Action <T> when, bool includeTracing = true) where T : class
{
var observer = new EventsObserver(@event =>
{
var type1 = @event as T;
if (type1 != null)
{
when(type1);
}
if (includeTracing)
{
Trace.WriteLine(@event);
}
});
var old = SystemObserver.Swap(new IObserver <ISystemEvent>[] { observer });
return(new Disposable(() => SystemObserver.Swap(old)));
}
