public ControlTowerActor()
{
// CosmosDb methods
var cdb = new CosmosDB();
// get info about the flight
var icao = Context.ActorOf <ICAOLookupActor>();
// register actor type as a sharded entity
region = ClusterSharding.Get(Context.System).Start(
typeName: "FlightActor",
entityProps: Props.Create <FlightActor>(),
settings: ClusterShardingSettings.Create(Context.System),
messageExtractor: new MessageExtractor());
// get a set of data readings
Receive <DeviceReading>(r =>
{
foreach (var a in r.aircraft.Where(z => !string.IsNullOrWhiteSpace(z.flight)))
{
if (!initedActors.ContainsKey(a.flight))
{
initedActors.Add(a.flight, DateTime.Now);
var cos = Context.ActorOf(CosmosSaveActor.Props(cdb));
region.Tell(new ShardEnvelope(shardId: "1", entityId: a.flight, message: new FlightActor.FlightActorInit(cos, a.flight, icao)));
}
// create message for flight actor
var req = new FlightActor.FlightDataRequest()
{
deviceId = r.deviceId,
flightData = a,
now = r.now
};
// send message to entity through shard region
region.Tell(new ShardEnvelope(shardId: "1", entityId: a.flight, message: req));
initedActors[a.flight] = DateTime.Now;
}
});
}
public SubCoordinatorActor()
{
// CosmosDb methods
var cdb = new CosmosDB();
// get info about the flight
var icao = Context.ActorOf <ICAOLookupActor>();
// flight code => Actor
Dictionary <string, IActorRef> flightActors = new Dictionary <string, IActorRef>();
// flight code => last message processed
Dictionary <string, DateTime> flightExpiry = new Dictionary <string, DateTime>();
// clear out old actors
Context.System.Scheduler.ScheduleTellRepeatedly(TimeSpan.FromMinutes(15), TimeSpan.FromMinutes(15), Self, new ExpireActors(), Self);
// group of readings
Receive <DeviceReading>(r =>
{
// foreach plane in current reading -- ignoring those w/o flight code
foreach (var dr in r.aircraft.Where(z => !string.IsNullOrWhiteSpace(z.flight)))
{
// create message for flight actor
var req = new FlightActor.FlightDataRequest()
{
deviceId = r.deviceId,
flightData = dr,
now = r.now
};
// if not started up, then do so now
if (!flightActors.ContainsKey(dr.flight))
{
var cos = Context.ActorOf(CosmosSaveActor.Props(cdb));
// flightActors.Add(dr.flight, Context.ActorOf(FlightActor.Props(cos, dr.flight, icao)));
flightActors.Add(dr.flight, Context.ActorOf(FlightActor.Props()));
flightActors[dr.flight].Tell(new FlightActor.FlightActorInit(cos, dr.flight, icao));
flightExpiry.Add(dr.flight, DateTime.Now);
}
// send message
flightActors[dr.flight].Tell(req);
// update timestamp
flightExpiry[dr.flight] = DateTime.Now;
}
});
// clear out actors that haven't recently processed a message
Receive <ExpireActors>(r =>
{
// get idle processor list
var toCleanup = flightExpiry
.Where(z => z.Value.AddHours(1) < DateTime.Now)
.Select(z => z.Key).ToList();
foreach (var t in toCleanup)
{
// shut down the actor
var actor = flightActors[t];
actor.GracefulStop(TimeSpan.FromSeconds(10));
// clear out from lists
flightActors.Remove(t);
flightExpiry.Remove(t);
}
});
}