public void CollectingTripData(int passengerCount, Trip trip, Route route)
{
//State dependencies passed directly in, no question of when they are available for use
//Closures for local state so that their lifetime is the same as the encompassing state
var stopTimes = new List <StopTime>();
int updatedPassengerCount = passengerCount;
Receive <VehicleRouteStatus>(msg =>
{
if (msg.State == VehicleRouteState.NoRoute)
{
var tripExecution = new TripExecution(trip.TripId, this.SumDistances(route, stopTimes));
Context.System.EventStream.Publish(tripExecution);
//We declaratively carry forward the passenger count
//In the previous example its not clear whether we are
//keeping this value or have a stale state bug
Become(() => WaitingForTrip(updatedPassengerCount));
}
});
Receive <StopTime>(msg =>
{
stopTimes.Add(msg);
updatedPassengerCount = updatedPassengerCount + msg.PassengerOn - msg.PassengerOff;
if (updatedPassengerCount < 0)
{
updatedPassengerCount = 0;
}
});
}
public ScheduleAdherenceActor1(
ITripClient tripClient,
IRouteClient routeClient)
{
this.tripClient = tripClient;
this.routeClient = routeClient;
ReceiveAsync <VehicleRouteStatus>(async msg =>
{
if (msg.State == VehicleRouteState.OnRoute)
{
this.stopTimes = new List <StopTime>();
if (msg.TripId.IsSome())
{
this.trip = await this.tripClient.GetTrip(msg.TripId.Value);
this.route = await this.routeClient.GetRoute(trip.RouteId);
}
}
else if (msg.State == VehicleRouteState.NoRoute)
{
if (this.trip == null)
{
return;
}
var tripExecution = new TripExecution(this.trip.TripId, this.SumDistances());
Context.System.EventStream.Publish(tripExecution);
}
});
Receive <StopTime>(msg =>
{
this.stopTimes.Add(msg);
this.passengerCount = this.passengerCount + msg.PassengerOn - msg.PassengerOff;
if (this.passengerCount < 0)
{
this.passengerCount = 0;
}
});
}
