Task TransferAirplane(FollowMeCar followme, AirplaneTransferCommand cmd)
{
return(new Task(() =>
{
GoPath(GoToVertexAlone, followme, cmd.PlaneLocationVertex);
GoPath(GoToVertexWithAirplane, followme, cmd.DestinationVertex);
MqClient.Send <ServiceCompletionMessage>(queuesTo[Component.GroundService], new ServiceCompletionMessage()
{
Component = Component.FollowMe,
PlaneId = followme.PlaneId
});
SendToLogs("Completed transfering airplane ID " + cmd.PlaneId);
Console.WriteLine($"FollowMe {followme.FollowMeId} completed transfering airplane ID "
+ cmd.PlaneId);
followme.Status = Status.Free;
Console.WriteLine($"FollowMe {followme.FollowMeId} is free now and going home");
var source = new CancellationTokenSource(); //adds token and remove it after went home/new cmd
tokens.TryAdd(followme.FollowMeId, source);
GoPathHome(followme, GetHomeVertex(), source.Token);
if (source.Token.IsCancellationRequested)
{
Console.WriteLine($"FollowMe {followme.FollowMeId} is going on new task");
}
else
{
Console.WriteLine($"FollowMe {followme.FollowMeId} is in garage now");
}
tokens.Remove(followme.FollowMeId, out source);
}));
}
public Task GotTransferRequest(AirplaneTransferCommand cmd)
{
Console.WriteLine($"Got transfer command of airplane {cmd.PlaneId} from vertex {cmd.PlaneLocationVertex} " +
$"to {cmd.DestinationVertex}");
var followme = cars.Values.FirstOrDefault(car => car.Status == Status.Free);
Task task = new Task(() =>
{
while (followme == null) //waits for a free car
{
source.CreateToken().Sleep(100);
followme = cars.Values.FirstOrDefault(car => car.Status == Status.Free);
}
if (tokens.TryGetValue(followme.FollowMeId, out var cancellationToken))
{
cancellationToken.Cancel(); //cancel going home
carTasks[followme.FollowMeId].Wait(); //wait for the task end
}
followme.Status = Status.Busy;
followme.PlaneId = cmd.PlaneId;
var t = TransferAirplane(followme, cmd);
carTasks.AddOrUpdate(followme.FollowMeId, t, (key, value) => value = t); //update task or add if not exists
t.Start();
Console.WriteLine($"FollowMe {followme.FollowMeId} go transfer airplane {cmd.PlaneId}");
});
return(task);
}
