বহু-গন্তব্য ভ্রমণ তৈরি করুন

static final String PROJECT_ID = "my-rideshare-co-gcp-project";
static final String TRIP_ID = "multi-destination-trip-A";

TripServiceBlockingStub tripService = TripService.newBlockingStub(channel);

// Trip initial settings.
String parent = "providers/" + PROJECT_ID;

Trip trip = Trip.newBuilder()
    .setTripType(TripType.EXCLUSIVE)
    .setPickupPoint(
        TerminalLocation.newBuilder().setPoint(
            LatLng.newBuilder()
                .setLatitude(-6.195139).setLongitude(106.820826)))
    .setNumberOfPassengers(1)
    .setDropoffPoint(
        TerminalLocation.newBuilder().setPoint(
            LatLng.newBuilder()
                .setLatitude(-6.1275).setLongitude(106.6537)))
    // Add the list of intermediate destinations.
    .addAllIntermediateDestinations(
        ImmutableList.of(
            TerminalLocation.newBuilder().setPoint(
                LatLng.newBuilder()
                    .setLatitude(-6.195139).setLongitude(106.820826)).build()))
    .build();

// Create the Trip request.
CreateTripRequest createTripRequest = CreateTripRequest.newBuilder()
    .setParent(parent)
    .setTripId(TRIP_ID)  // Trip ID assigned by the Provider server.
    .setTrip(trip)       // Initial state is NEW.
    .build();

// Error handling.
try {
  Trip createdTrip =
      tripService.createTrip(createTripRequest);
} catch (StatusRuntimeException e) {
  Status s = e.getStatus();
  switch (s.getCode()) {
    case ALREADY_EXISTS:  // Trip already exists.
      break;
    case PERMISSION_DENIED:
      break;
  }
  return;
}

static final String PROJECT_ID = "my-rideshare-co-gcp-project";
static final String TRIP_ID = "multi-destination-trip-A";

String tripName = "providers/" + PROJECT_ID + "/trips/" + TRIP_ID;

TripServiceBlockingStub tripService = TripService.newBlockingStub(channel);

// The trip settings to be updated.
Trip trip = Trip.newBuilder()
    // Add the list of intermediate destinations.
    .addAllIntermediateDestinations(
        ImmutableList.of(
            TerminalLocation.newBuilder().setPoint(
                LatLng.newBuilder()
                    .setLatitude(-6.195139).setLongitude(106.820826)).build()))
    .setVehicleId("8241890")
    .build();

// The trip update request.
UpdateTripRequest updateTripRequest = UpdateTripRequest.newBuilder()
    .setName(tripName)
    .setTrip(trip)
    .setUpdateMask(
        FieldMask.newBuilder()
            .addPaths("intermediate_destinations")
            .addPaths("vehicle_id")
            .build())
    .build();

// Error handling.
try {
  Trip updatedTrip =
      tripService.updateTrip(updateTripRequest);
} catch (StatusRuntimeException e) {
  Status s = e.getStatus();
  switch (s.getCode()) {
    case NOT_FOUND:            // The trip doesn't exist.
      break;
    case PERMISSION_DENIED:
      break;
  }
  return;
}

static final String PROJECT_ID = "my-rideshare-co-gcp-project";
static final String TRIP_ID = "multi-destination-trip-A";

String tripName = "providers/" + PROJECT_ID + "/trips/" + TRIP_ID;

// Get the trip object from either the Fleet Engine or storage.
Trip trip = …;

TripServiceBlockingStub tripService = TripService.newBlockingStub(channel);

// The trip settings to be updated.
Trip trip = Trip.newBuilder()
    // Trip status cannot return to a previous state once it has passed.
    .setTripStatus(TripStatus.ENROUTE_TO_INTERMEDIATE_DESTINATION)

    // Enroute to the first intermediate destination.
    .setIntermediateDestinationIndex(0)

    // You must provide an intermediate_destinations_version to ensure that you
    // have the same intermediate destinations list as the Fleet Engine.
    .setIntermediateDestinationsVersion(
         trip.getIntermediateDestinationsVersion())
    .build();

// The trip update request.
UpdateTripRequest updateTripRequest = UpdateTripRequest.newBuilder()
    .setName(tripName)
    .setTrip(trip)
    .setUpdateMask(
        FieldMask.newBuilder()
            .addPaths("trip_status")
            .addPaths("intermediate_destination_index")
            // intermediate_destinations_version must not be in the update mask.
            .build())
    .build();

// Error handling.
try {
  Trip updatedTrip =
      tripService.updateTrip(updateTripRequest);
} catch (StatusRuntimeException e) {
  Status s = e.getStatus();
  switch (s.getCode()) {
    case NOT_FOUND:            // The trip doesn't exist.
      break;
    case FAILED_PRECONDITION:  // Either the trip status is invalid, or the
                               // intermediate_destinations_version doesn't
                               // match Fleet Engine's.
      break;
    case PERMISSION_DENIED:
      break;
  }
  return;
}