This section shows how to get the vehicle ready for trips. You must complete each of the following steps before your backend can match a vehicle to a trip.
Set up listener
Since the Driver SDK performs actions in the
background, use the DriverStatusListener to trigger notifications when certain
events occur, such as errors, warnings, or debug messages. Errors can be
transient in nature (such as BACKEND_CONNECTIVITY_ERROR), or they might
cause location updates to stop permanently. For example, if you receive a
VEHICLE_NOT_FOUND error, it indicates a configuration error.
The following example shows a DriverStatusListener implementation:
class MyStatusListener implements DriverStatusListener {
/** Called when background status is updated, during actions such as location reporting. */
@Override
public void updateStatus(
StatusLevel statusLevel, StatusCode statusCode, String statusMsg, @Nullable Throwable cause) {
// Existing implementation
if (cause != null && cause instanceof StatusRuntimeException) {
if (Status.NOT_FOUND.getCode().equals(cause.getStatus().getCode())) {
// NOT_FOUND gRPC exception thrown by Fleet Engine.
}
}
}
}
DriverContextBuilder.setDriverStatusListener(new MyStatusListener());
Enable location updates
After you set up the listener, enable location updates as follows:
Java
RidesharingVehicleReporter reporter = ...;
reporter.enableLocationTracking();
Kotlin
val reporter = ...
reporter.enableLocationTracking()
Set the update interval
By default, the Driver SDK sends location updates at 10-second intervals
interval when the vehicle state is ONLINE. You can change this interval with
reporter.setLocationReportingInterval(long, TimeUnit). The minimum supported
update interval is 5 seconds. More frequent updates may result in slower
requests and errors.
Set the vehicle state to online
When you turn on location updates, you can set the vehicle state to ONLINE to
make the vehicle available for SearchVehicles queries in Fleet Engine. The
Driver SDK sends the updated vehicle state along with the location updates.
You can set the vehicle state directly in the Driver SDK or in the Fleet Engine server. For more information, see Update a Vehicle.
The following examples show how to set the vehicle state to online in the Driver SDK:
Java
RidesharingVehicleReporter reporter = ...;
reporter.enableLocationTracking();
reporter.setVehicleState(VehicleState.ONLINE);
Kotlin
val reporter = ...
reporter.enableLocationTracking()
reporter.setVehicleState(VehicleState.ONLINE)
The StatusListener also reports any errors that occur when updating the
vehicle state.