/**
* This method downloads the latest vehicle data, processes each vehicle in turn, and create a
* GTFS-realtime feed of trip updates and vehicle positions as a result.
*/
private void refreshVehicles() throws IOException, JSONException {
/** We download the vehicle details as an array of JSON objects. */
JSONArray vehicleArray = downloadVehicleDetails();
/**
* The FeedMessage.Builder is what we will use to build up our GTFS-realtime feeds. We create a
* feed for both trip updates and vehicle positions.
*/
FeedMessage.Builder tripUpdates = GtfsRealtimeLibrary.createFeedMessageBuilder();
FeedMessage.Builder vehiclePositions = GtfsRealtimeLibrary.createFeedMessageBuilder();
/** We iterate over every JSON vehicle object. */
for (int i = 0; i < vehicleArray.length(); ++i) {
JSONObject obj = vehicleArray.getJSONObject(i);
String trainNumber = obj.getString("trainno");
String route = obj.getString("dest");
String stopId = obj.getString("nextstop");
double lat = obj.getDouble("lat");
double lon = obj.getDouble("lon");
int delay = obj.getInt("late");
/**
* We construct a TripDescriptor and VehicleDescriptor, which will be used in both trip
* updates and vehicle positions to identify the trip and vehicle. Ideally, we would have a
* trip id to use for the trip descriptor, but the SEPTA api doesn't include it, so we settle
* for a route id instead.
*/
TripDescriptor.Builder tripDescriptor = TripDescriptor.newBuilder();
tripDescriptor.setRouteId(route);
VehicleDescriptor.Builder vehicleDescriptor = VehicleDescriptor.newBuilder();
vehicleDescriptor.setId(trainNumber);
/**
* To construct our TripUpdate, we create a stop-time arrival event for the next stop for the
* vehicle, with the specified arrival delay. We add the stop-time update to a TripUpdate
* builder, along with the trip and vehicle descriptors.
*/
StopTimeEvent.Builder arrival = StopTimeEvent.newBuilder();
arrival.setDelay(delay * 60);
StopTimeUpdate.Builder stopTimeUpdate = StopTimeUpdate.newBuilder();
stopTimeUpdate.setArrival(arrival);
stopTimeUpdate.setStopId(stopId);
TripUpdate.Builder tripUpdate = TripUpdate.newBuilder();
tripUpdate.addStopTimeUpdate(stopTimeUpdate);
tripUpdate.setTrip(tripDescriptor);
tripUpdate.setVehicle(vehicleDescriptor);
/**
* Create a new feed entity to wrap the trip update and add it to the GTFS-realtime trip
* updates feed.
*/
FeedEntity.Builder tripUpdateEntity = FeedEntity.newBuilder();
tripUpdateEntity.setId(trainNumber);
tripUpdateEntity.setTripUpdate(tripUpdate);
tripUpdates.addEntity(tripUpdateEntity);
/**
* To construct our VehiclePosition, we create a position for the vehicle. We add the position
* to a VehiclePosition builder, along with the trip and vehicle descriptors.
*/
Position.Builder position = Position.newBuilder();
position.setLatitude((float) lat);
position.setLongitude((float) lon);
VehiclePosition.Builder vehiclePosition = VehiclePosition.newBuilder();
vehiclePosition.setPosition(position);
vehiclePosition.setTrip(tripDescriptor);
vehiclePosition.setVehicle(vehicleDescriptor);
/**
* Create a new feed entity to wrap the vehicle position and add it to the GTFS-realtime
* vehicle positions feed.
*/
FeedEntity.Builder vehiclePositionEntity = FeedEntity.newBuilder();
vehiclePositionEntity.setId(trainNumber);
vehiclePositionEntity.setVehicle(vehiclePosition);
vehiclePositions.addEntity(vehiclePositionEntity);
}
/** Build out the final GTFS-realtime feed messagse and save them. */
_gtfsRealtimeProvider.setTripUpdates(tripUpdates.build());
_gtfsRealtimeProvider.setVehiclePositions(vehiclePositions.build());
_log.info("vehicles extracted: " + tripUpdates.getEntityCount());
}
@Test
public void testUpdate() {
TripUpdate tripUpdate;
TripUpdate.Builder tripUpdateBuilder;
TripDescriptor.Builder tripDescriptorBuilder;
StopTimeUpdate.Builder stopTimeUpdateBuilder;
StopTimeEvent.Builder stopTimeEventBuilder;
int trip_1_1_index = timetable.getTripIndex(new AgencyAndId("agency", "1.1"));
Vertex stop_a = graph.getVertex("agency_A");
Vertex stop_c = graph.getVertex("agency_C");
RoutingRequest options = new RoutingRequest();
ShortestPathTree spt;
GraphPath path;
// non-existing trip
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("b");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.CANCELED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
tripUpdate = tripUpdateBuilder.build();
assertFalse(timetable.update(tripUpdate, "a", timeZone, serviceDate));
// update trip with bad data
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
stopTimeUpdateBuilder.setStopSequence(0);
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SKIPPED);
tripUpdate = tripUpdateBuilder.build();
assertFalse(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
// update trip with non-increasing data
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
stopTimeUpdateBuilder.setStopSequence(2);
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
stopTimeEventBuilder.setTime(
TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 10, 1));
stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
stopTimeEventBuilder.setTime(
TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 10, 0));
tripUpdate = tripUpdateBuilder.build();
assertFalse(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
// ---
long startTime = TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 0, 0);
long endTime;
options.dateTime = startTime;
// ---
options.setRoutingContext(graph, stop_a, stop_c);
spt = aStar.getShortestPathTree(options);
path = spt.getPath(stop_c, false);
assertNotNull(path);
endTime = startTime + 20 * 60;
assertEquals(endTime, path.getEndTime());
// update trip
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
stopTimeUpdateBuilder.setStopSequence(1);
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
stopTimeEventBuilder.setTime(
TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 2, 0));
stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
stopTimeEventBuilder.setTime(
TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 2, 0));
tripUpdate = tripUpdateBuilder.build();
assertEquals(20 * 60, timetable.getTripTimes(trip_1_1_index).getArrivalTime(2));
assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
assertEquals(20 * 60 + 120, timetable.getTripTimes(trip_1_1_index).getArrivalTime(2));
// ---
options.setRoutingContext(graph, stop_a, stop_c);
spt = aStar.getShortestPathTree(options);
path = spt.getPath(stop_c, false);
assertNotNull(path);
endTime = startTime + 20 * 60 + 120;
assertEquals(endTime, path.getEndTime());
// cancel trip
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.CANCELED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
tripUpdate = tripUpdateBuilder.build();
assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
TripTimes tripTimes = timetable.getTripTimes(trip_1_1_index);
for (int i = 0; i < tripTimes.getNumStops(); i++) {
assertEquals(TripTimes.UNAVAILABLE, tripTimes.getDepartureTime(i));
assertEquals(TripTimes.UNAVAILABLE, tripTimes.getArrivalTime(i));
}
// ---
options.setRoutingContext(graph, stop_a, stop_c);
spt = aStar.getShortestPathTree(options);
path = spt.getPath(stop_c, false);
assertNotNull(path);
endTime = startTime + 40 * 60;
assertEquals(endTime, path.getEndTime());
// update trip arrival time incorrectly
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
stopTimeUpdateBuilder.setStopSequence(1);
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
stopTimeEventBuilder.setDelay(0);
tripUpdate = tripUpdateBuilder.build();
assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
// update trip arrival time only
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
stopTimeUpdateBuilder.setStopSequence(2);
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
stopTimeEventBuilder.setDelay(1);
tripUpdate = tripUpdateBuilder.build();
assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
// update trip departure time only
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
stopTimeUpdateBuilder.setStopSequence(2);
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
stopTimeEventBuilder.setDelay(-1);
tripUpdate = tripUpdateBuilder.build();
assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
// update trip using stop id
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
stopTimeUpdateBuilder.setStopId("B");
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
stopTimeEventBuilder.setDelay(-1);
tripUpdate = tripUpdateBuilder.build();
assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
// update trip arrival time at first stop and make departure time incoherent at second stop
tripDescriptorBuilder = TripDescriptor.newBuilder();
tripDescriptorBuilder.setTripId("1.1");
tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
tripUpdateBuilder = TripUpdate.newBuilder();
tripUpdateBuilder.setTrip(tripDescriptorBuilder);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
stopTimeUpdateBuilder.setStopSequence(1);
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
stopTimeEventBuilder.setDelay(0);
stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(1);
stopTimeUpdateBuilder.setStopSequence(2);
stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
stopTimeEventBuilder.setDelay(-1);
tripUpdate = tripUpdateBuilder.build();
assertFalse(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
}