为了让车队引擎发挥最佳性能,请向其提供车辆位置更新流。您可以通过以下任一方式提供这些更新:
- 使用 Driver SDK:最简单的选项。请参阅适用于 Android 或 iOS 的 Driver SDK 文档。
- 使用自定义代码:如果位置信息是通过后端中继的,或者您使用的是 Android 或 iOS 以外的设备,则此方法非常有用。本指南将介绍该方法。
如果不使用 Driver SDK 更新车辆的位置信息,您可以使用车辆的位置信息直接调用车队引擎。对于任何处于活跃状态的车辆,车队引擎预计位置信息更新至少每分钟一次,最多每 5 秒一次。这些更新仅需要 Fleet Engine Driver SDK User 权限。
更新车辆位置信息示例
Java
static final String PROJECT_ID = "project-id";
static final String VEHICLE_ID = "vid-8241890";
VehicleServiceBlockingStub vehicleService = VehicleService.newBlockingStub(channel);
String vehicleName = "providers/" + PROJECT_ID + "/vehicles/" + VEHICLE_ID;
Vehicle updatedVehicle = Vehicle.newBuilder()
.setLastLocation(VehicleLocation.newBuilder()
.setSupplementalLocation(LatLng.newBuilder()
.setLatitude(37.3382)
.setLongitude(121.8863))
.setSupplementalLocationTime(now())
.setSupplementalLocationSensor(LocationSensor.CUSTOMER_SUPPLIED_LOCATION)
.setSupplementalLocationAccuracy(DoubleValue.of(15.0))) // Optional
.build();
UpdateVehicleRequest updateVehicleRequest = UpdateVehicleRequest.newBuilder()
.setName(vehicleName)
.setVehicle(updatedVehicle)
.setUpdateMask(FieldMask.newBuilder()
.addPaths("last_location"))
.build();
try {
Vehicle updatedVehicle =
vehicleService.updateVehicle(updateVehicleRequest);
} catch (StatusRuntimeException e) {
Status s = e.getStatus();
switch (s.getCode()) {
case NOT_FOUND:
// Most implementations will call CreateVehicle in this case
break;
case PERMISSION_DENIED:
break;
}
return;
}
// If no Exception, Vehicle updated successfully.
REST
curl -X PUT \
"https://fleetengine.googleapis.com/v1/providers/project-id/vehicles/vid-8241890?updateMask=last_location" \
-H "Authorization: Bearer $JWT" \
-H "Content-Type: application/json" \
--data-binary @- << EOM
{
"supplementalLocation": {"latitude": 12.1, "longitude": 14.5},
"supplementalLocationTime": "$(date -u --iso-8601=seconds)",
"supplementalLocationSensor": "CUSTOMER_SUPPLIED_LOCATION",
"supplementalLocationAccuracy": 15
}
EOM
请参阅 providers.vehicles.update 参考文档。