public void record(FeedMessage feedMessage) throws SQLException {
int numAlerts = 0;
int numTripUpdates = 0;
int numVehiclePositions = 0;
mOpenQueries = 0;
for (FeedEntity entity : feedMessage.getEntityList()) {
if (entity.hasAlert()) {
numAlerts++;
}
if (entity.hasTripUpdate()) {
numTripUpdates++;
}
if (entity.hasVehicle()) {
numVehiclePositions++;
}
}
boolean hasAlerts = numAlerts > 0;
boolean hasTripUpdates = numTripUpdates > 0;
boolean hasVehiclePositions = numVehiclePositions > 0;
mLogger.info(
String.format(
"Entities: alerts=%d, updates=%d, positions=%d",
numAlerts, numTripUpdates, numVehiclePositions));
mLogger.info("Clearing tables...");
if (hasAlerts) {
clearAlertsData();
}
if (hasTripUpdates) {
clearTripUpdatesData();
}
if (hasVehiclePositions) {
clearVehiclePositionsData();
}
mLogger.info("Finished clearing tables");
if (!hasAlerts && !hasTripUpdates && !hasVehiclePositions) {
mLogger.info("Nothing to record");
return;
}
boolean useCopy = mConnection instanceof BaseConnection;
CopyManager cm = null;
DataCopier tuCopier = null;
DataCopier stCopier = null;
DataCopier vpCopier = null;
CopyIn tuCopyIn = null;
CopyIn stCopyIn = null;
CopyIn vpCopyIn = null;
if (useCopy) {
cm = new CopyManager((BaseConnection) mConnection);
tuCopier = new DataCopier();
stCopier = new DataCopier();
vpCopier = new DataCopier();
if (hasTripUpdates) {
stCopyIn = cm.copyIn(COPY_TRIP_UPDATES_STOP_TIMES);
mOpenQueries++;
stCopier = new DataCopier(stCopyIn, COPY_SEPARATOR);
} else if (hasVehiclePositions) {
vpCopyIn = cm.copyIn(COPY_VEHICLE_POSITIONS);
mOpenQueries++;
vpCopier = new DataCopier(vpCopyIn, COPY_SEPARATOR);
}
}
for (FeedEntity entity : feedMessage.getEntityList()) {
if (entity.hasAlert()) {
try {
recordAlert(entity.getAlert());
} catch (SQLException e) {
mLogger.warning(getString(e));
}
}
if (entity.hasTripUpdate()) {
try {
recordTripUpdate(entity.getTripUpdate(), tuCopier, stCopier);
} catch (Exception e) {
mLogger.warning(getString(e));
}
}
if (entity.hasVehicle()) {
try {
recordVehicle(entity.getVehicle(), vpCopier);
} catch (Exception e) {
mLogger.warning(getString(e));
}
}
}
if (hasAlerts) {
mLogger.info("Committing alerts... ");
try {
mStatements.get(STALERT).executeBatch();
mStatements.get(STALERT_ENTITIES).executeBatch();
mStatements.get(STALERT_TIMERANGES).executeBatch();
mLogger.info("done");
} catch (Exception e) {
mLogger.warning(getString(e));
}
}
if (hasTripUpdates) {
mLogger.info("Committing trip updates... ");
try {
if (stCopier == null) {
mStatements.get(STTRIPUPDATE_STOPTIMEUPDATES).executeBatch();
} else if (stCopyIn == null && stCopier.size() > 0) {
stCopyIn = cm.copyIn(COPY_TRIP_UPDATES_STOP_TIMES);
mOpenQueries++;
stCopier.write(stCopyIn, COPY_SEPARATOR);
}
} catch (SQLException e) {
e.printStackTrace();
}
if (stCopyIn != null) {
try {
stCopyIn.endCopy();
mOpenQueries--;
} catch (Exception e) {
mLogger.warning(getString(e));
}
}
try {
if (tuCopier == null) {
mStatements.get(STTRIPUPDATE).executeBatch();
} else if (tuCopyIn == null && tuCopier.size() > 0) {
tuCopyIn = cm.copyIn(COPY_TRIP_UPDATES);
mOpenQueries++;
tuCopier.write(tuCopyIn, COPY_SEPARATOR);
}
} catch (SQLException e) {
e.printStackTrace();
}
if (tuCopyIn != null) {
try {
tuCopyIn.endCopy();
mOpenQueries--;
} catch (Exception e) {
mLogger.warning(getString(e));
}
}
mLogger.info("done");
}
if (hasVehiclePositions) {
System.err.print("Committing vehicle positions... ");
try {
if (vpCopier == null) {
mStatements.get(STVEHICLE).executeBatch();
} else if (vpCopyIn == null && vpCopier.size() > 0) {
vpCopyIn = cm.copyIn(COPY_VEHICLE_POSITIONS);
mOpenQueries++;
vpCopier.write(vpCopyIn, COPY_SEPARATOR);
}
} catch (Exception e) {
mLogger.warning(getString(e));
}
if (vpCopyIn != null) {
vpCopyIn.endCopy();
mOpenQueries--;
}
mLogger.info("done");
}
}
/**
* 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());
}