Approaches
为了让 Fleet Engine 达到最佳性能,请为其提供一流车辆 位置至少每分钟更新一次,最多每 5 秒更新一次。 使用以下任一方式提供这些更新:
- 使用驱动程序 SDK:最简单的选项。
- 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。本文档介绍了该方法。
无论您通过何种方式提供车辆位置信息更新,您的后端都会 负责在有货车辆正在前往 以及到达经停点时其中包括仓库本身。Fleet Engine 不会自动检测这些事件。
更新车辆位置信息示例
您可以使用 Java gRPC 库在舰队中更新车辆的位置 或使用 REST。
Java
static final String PROJECT_ID = "my-delivery-co-gcp-project";
static final String VEHICLE_ID = "vehicle-8241890";
DeliveryServiceBlockingStub deliveryService =
DeliveryServiceGrpc.newBlockingStub(channel);
// Vehicle settings
String vehicleName = "providers/" + PROJECT_ID + "/deliveryVehicles/" + VEHICLE_ID;
DeliveryVehicle myDeliveryVehicle = DeliveryVehicle.newBuilder()
.setLastLocation(DeliveryVehicleLocation.newBuilder()
.setSupplementalLocation(LatLng.newBuilder()
.setLatitude(37.3382)
.setLongitude(121.8863))
.setSupplementalLocationTime(now())
.setSupplementalLocationSensor(DeliveryVehicleLocationSensor.CUSTOMER_SUPPLIED_LOCATION)
.setSupplementalLocationAccuracy(DoubleValue.of(15.0))) // Optional
.build();
// DeliveryVehicle request
UpdateDeliveryVehicleRequest updateDeliveryVehicleRequest =
UpdateDeliveryVehicleRequest.newBuilder() // No need for the header
.setName(vehicleName)
.setDeliveryVehicle(myDeliveryVehicle)
.setUpdateMask(FieldMask.newBuilder()
.addPaths("last_location"))
.build();
try {
DeliveryVehicle updatedDeliveryVehicle =
deliveryService.updateDeliveryVehicle(updateDeliveryVehicleRequest);
} catch (StatusRuntimeException e) {
Status s = e.getStatus();
switch (s.getCode()) {
case NOT_FOUND:
break;
case PERMISSION_DENIED:
break;
}
return;
}
REST
PATCH https://fleetengine.googleapis.com/v1/providers/<project_id>/deliveryVehicles/<id>?updateMask=last_location
请求详情
请求正文必须包含一个 DeliveryVehicle
实体,用于指定
字段,如下所示:
必填字段:
字段 值 lastLocation.supplementalLocation
车辆的位置。 lastLocation.supplementalLocationTime
车辆上次在此位置的已知时间戳。 lastLocation.supplementalLocationSensor
应使用 CUSTOMER_SUPPLIED_LOCATION
填充。选填字段:
字段 值 lastLocation.supplementalLocationAccuracy
所提供位置的精确度(以米为单位)。
# Set JWT, PROJECT_ID, VEHICLE_ID, TASK1_ID, and TASK2_ID in the local
# environment
curl -X PATCH "https://fleetengine.googleapis.com/v1/providers/${PROJECT_ID}/deliveryVehicles/${VEHICLE_ID}?updateMask=remainingVehicleJourneySegments" \
-H "Content-type: application/json" \
-H "Authorization: Bearer ${JWT}" \
--data-binary @- << EOM
{
"lastLocation": {
"supplementalLocation": {"latitude": 12.1, "longitude": 14.5},
"supplementalLocationTime": "$(date -u --iso-8601=seconds)",
"supplementalLocationSensor": "CUSTOMER_SUPPLIED_LOCATION",
"supplementalLocationAccuracy": 15
}
}
EOM