public OrleansMessageBus(IDependencyResolver resolver, ScaleoutConfiguration configuration) : base(resolver, configuration) { grain = PubSubGrainFactory.GetGrain(Guid.NewGuid()); subscriber = new MessageObserver((messages) => { lock (grain) { OnReceived(messages[0].StreamIndex, messages.Select(x => x.MappingId).Max(), new ScaleoutMessage(messages)); } }); subscriberReference = MessageObserverFactory.CreateObjectReference(subscriber).Result; grain.Subscribe(subscriberReference).Wait(); }