Route Optimization API: Node.js Client

Route Optimization API client for Node.js

A comprehensive list of changes in each version may be found in the CHANGELOG.

• Route Optimization API Node.js Client API Reference
• Route Optimization API Documentation
• github.com/googleapis/google-cloud-node/packages/google-maps-routeoptimization

Read more about the client libraries for Cloud APIs, including the older Google APIs Client Libraries, in Client Libraries Explained.

Table of contents:

• Quickstart
  • Before you begin
  • Installing the client library
  • Using the client library
• Samples
• Versioning
• Contributing
• License

Quickstart

Before you begin

1. Select or create a Cloud Platform project.
2. Enable billing for your project.
3. Enable the Route Optimization API API.
4. Set up authentication with a service account so you can access the API from your local workstation.

Installing the client library

npm install @googlemaps/routeoptimization

Using the client library

/**
 * This snippet has been automatically generated and should be regarded as a code template only.
 * It will require modifications to work.
 * It may require correct/in-range values for request initialization.
 * TODO(developer): Uncomment these variables before running the sample.
 */
/**
 *  Required. Target project or location to make a call.
 *  Format:
 *  * `projects/{project-id}`
 *  * `projects/{project-id}/locations/{location-id}`
 *  If no location is specified, a region will be chosen automatically.
 */
// const parent = 'abc123'
/**
 *  If this timeout is set, the server returns a response before the timeout
 *  period has elapsed or the server deadline for synchronous requests is
 *  reached, whichever is sooner.
 *  For asynchronous requests, the server will generate a solution (if
 *  possible) before the timeout has elapsed.
 */
// const timeout = {}
/**
 *  Shipment model to solve.
 */
// const model = {}
/**
 *  By default, the solving mode is `DEFAULT_SOLVE` (0).
 */
// const solvingMode = {}
/**
 *  Search mode used to solve the request.
 */
// const searchMode = {}
/**
 *  Guide the optimization algorithm in finding a first solution that is
 *  similar to a previous solution.
 *  The model is constrained when the first solution is built.
 *  Any shipments not performed on a route are implicitly skipped in the first
 *  solution, but they may be performed in successive solutions.
 *  The solution must satisfy some basic validity assumptions:
 *    * for all routes, `vehicle_index` must be in range and not be duplicated.
 *    * for all visits, `shipment_index` and `visit_request_index` must be
 *      in range.
 *    * a shipment may only be referenced on one route.
 *    * the pickup of a pickup-delivery shipment must be performed before
 *      the delivery.
 *    * no more than one pickup alternative or delivery alternative of
 *      a shipment may be performed.
 *    * for all routes, times are increasing (i.e., `vehicle_start_time
 *      <= visits0.start_time <= visits1.start_time ...
 *      <= vehicle_end_time`).
 *    * a shipment may only be performed on a vehicle that is allowed. A
 *      vehicle is allowed if
 *      Shipment.allowed_vehicle_indices google.maps.routeoptimization.v1.Shipment.allowed_vehicle_indices
 *      is empty or its `vehicle_index` is included in
 *      Shipment.allowed_vehicle_indices google.maps.routeoptimization.v1.Shipment.allowed_vehicle_indices.
 *  If the injected solution is not feasible, a validation error is not
 *  necessarily returned and an error indicating infeasibility may be returned
 *  instead.
 */
// const injectedFirstSolutionRoutes = [1,2,3,4]
/**
 *  Constrain the optimization algorithm to find a final solution that is
 *  similar to a previous solution. For example, this may be used to freeze
 *  portions of routes which have already been completed or which are to be
 *  completed but must not be modified.
 *  If the injected solution is not feasible, a validation error is not
 *  necessarily returned and an error indicating infeasibility may be returned
 *  instead.
 */
// const injectedSolutionConstraint = {}
/**
 *  If non-empty, the given routes will be refreshed, without modifying their
 *  underlying sequence of visits or travel times: only other details will be
 *  updated. This does not solve the model.
 *  As of 2020/11, this only populates the polylines of non-empty routes and
 *  requires that `populate_polylines` is true.
 *  The `route_polyline` fields of the passed-in routes may be inconsistent
 *  with route `transitions`.
 *  This field must not be used together with `injected_first_solution_routes`
 *  or `injected_solution_constraint`.
 *  `Shipment.ignore` and `Vehicle.ignore` have no effect on the behavior.
 *  Polylines are still populated between all visits in all non-empty routes
 *  regardless of whether the related shipments or vehicles are ignored.
 */
// const refreshDetailsRoutes = [1,2,3,4]
/**
 *  If true:
 *    * uses
 *    ShipmentRoute.vehicle_label google.maps.routeoptimization.v1.ShipmentRoute.vehicle_label
 *    instead of `vehicle_index` to
 *      match routes in an injected solution with vehicles in the request;
 *      reuses the mapping of original
 *      ShipmentRoute.vehicle_index google.maps.routeoptimization.v1.ShipmentRoute.vehicle_index
 *      to new
 *      ShipmentRoute.vehicle_index google.maps.routeoptimization.v1.ShipmentRoute.vehicle_index
 *      to update
 *      ConstraintRelaxation.vehicle_indices google.maps.routeoptimization.v1.InjectedSolutionConstraint.ConstraintRelaxation.vehicle_indices
 *      if non-empty, but the mapping must be unambiguous (i.e., multiple
 *      `ShipmentRoute`s must not share the same original `vehicle_index`).
 *    * uses
 *    ShipmentRoute.Visit.shipment_label google.maps.routeoptimization.v1.ShipmentRoute.Visit.shipment_label
 *    instead of `shipment_index`
 *      to match visits in an injected solution with shipments in the request;
 *    * uses
 *    SkippedShipment.label google.maps.routeoptimization.v1.SkippedShipment.label
 *    instead of
 *    SkippedShipment.index google.maps.routeoptimization.v1.SkippedShipment.index
 *    to
 *      match skipped shipments in the injected solution with request
 *      shipments.
 *  This interpretation applies to the `injected_first_solution_routes`,
 *  `injected_solution_constraint`, and `refresh_details_routes` fields.
 *  It can be used when shipment or vehicle indices in the request have
 *  changed since the solution was created, perhaps because shipments or
 *  vehicles have been removed from or added to the request.
 *  If true, labels in the following categories must appear at most once in
 *  their category:
 *    * Vehicle.label google.maps.routeoptimization.v1.Vehicle.label  in the
 *    request;
 *    * Shipment.label google.maps.routeoptimization.v1.Shipment.label  in
 *    the request;
 *    * ShipmentRoute.vehicle_label google.maps.routeoptimization.v1.ShipmentRoute.vehicle_label  in the injected solution;
 *    * SkippedShipment.label google.maps.routeoptimization.v1.SkippedShipment.label  and ShipmentRoute.Visit.shipment_label google.maps.routeoptimization.v1.ShipmentRoute.Visit.shipment_label  in
 *      the injected solution (except pickup/delivery visit pairs, whose
 *      `shipment_label` must appear twice).
 *  If a `vehicle_label` in the injected solution does not correspond to a
 *  request vehicle, the corresponding route is removed from the solution
 *  along with its visits. If a `shipment_label` in the injected solution does
 *  not correspond to a request shipment, the corresponding visit is removed
 *  from the solution. If a
 *  SkippedShipment.label google.maps.routeoptimization.v1.SkippedShipment.label
 *  in the injected solution does not correspond to a request shipment, the
 *  `SkippedShipment` is removed from the solution.
 *  Removing route visits or entire routes from an injected solution may
 *  have an effect on the implied constraints, which may lead to change in
 *  solution, validation errors, or infeasibility.
 *  NOTE: The caller must ensure that each
 *  Vehicle.label google.maps.routeoptimization.v1.Vehicle.label  (resp.
 *  Shipment.label google.maps.routeoptimization.v1.Shipment.label) uniquely
 *  identifies a vehicle (resp. shipment) entity used across the two relevant
 *  requests: the past request that produced the `OptimizeToursResponse` used
 *  in the injected solution and the current request that includes the injected
 *  solution. The uniqueness checks described above are not enough to guarantee
 *  this requirement.
 */
// const interpretInjectedSolutionsUsingLabels = true
/**
 *  Consider traffic estimation in calculating `ShipmentRoute` fields
 *  Transition.travel_duration google.maps.routeoptimization.v1.ShipmentRoute.Transition.travel_duration,
 *  Visit.start_time google.maps.routeoptimization.v1.ShipmentRoute.Visit.start_time,
 *  and `vehicle_end_time`; in setting the
 *  ShipmentRoute.has_traffic_infeasibilities google.maps.routeoptimization.v1.ShipmentRoute.has_traffic_infeasibilities
 *  field, and in calculating the
 *  OptimizeToursResponse.total_cost google.maps.routeoptimization.v1.OptimizeToursResponse.total_cost
 *  field.
 */
// const considerRoadTraffic = true
/**
 *  If true, polylines will be populated in response `ShipmentRoute`s.
 */
// const populatePolylines = true
/**
 *  If true, polylines will be populated in response
 *  ShipmentRoute.transitions google.maps.routeoptimization.v1.ShipmentRoute.transitions.
 */
// const populateTransitionPolylines = true
/**
 *  If this is set, then the request can have a deadline
 *  (see https://grpc.io/blog/deadlines) of up to 60 minutes.
 *  Otherwise, the maximum deadline is only 30 minutes.
 *  Note that long-lived requests have a significantly larger (but still small)
 *  risk of interruption.
 */
// const allowLargeDeadlineDespiteInterruptionRisk = true
/**
 *  If true, travel distances will be computed using geodesic distances instead
 *  of Google Maps distances, and travel times will be computed using geodesic
 *  distances with a speed defined by `geodesic_meters_per_second`.
 */
// const useGeodesicDistances = true
/**
 *  When `use_geodesic_distances` is true, this field must be set and defines
 *  the speed applied to compute travel times. Its value must be at least 1.0
 *  meters/seconds.
 */
// const geodesicMetersPerSecond = 1234
/**
 *  Truncates the number of validation errors returned. These errors are
 *  typically attached to an INVALID_ARGUMENT error payload as a BadRequest
 *  error detail (https://cloud.google.com/apis/design/errors#error_details),
 *  unless solving_mode=VALIDATE_ONLY: see the
 *  OptimizeToursResponse.validation_errors google.maps.routeoptimization.v1.OptimizeToursResponse.validation_errors
 *  field.
 *  This defaults to 100 and is capped at 10,000.
 */
// const maxValidationErrors = 1234
/**
 *  Label that may be used to identify this request, reported back in the
 *  OptimizeToursResponse.request_label google.maps.routeoptimization.v1.OptimizeToursResponse.request_label.
 */
// const label = 'abc123'

// Imports the Routeoptimization library
const {RouteOptimizationClient} = require('@googlemaps/routeoptimization').v1;

// Instantiates a client
const routeoptimizationClient = new RouteOptimizationClient();

async function callOptimizeTours() {
  // Construct request
  const request = {
    parent,
    model,
  };

  // Run request
  const response = await routeoptimizationClient.optimizeTours(request);
  console.log(response);
}

callOptimizeTours();

Samples

Samples are in the samples/ directory. Each sample's README.md has instructions for running its sample.

Sample	Source Code	Try it
Route_optimization.batch_optimize_tours	source code
Route_optimization.optimize_tours	source code
Quickstart	source code

The Route Optimization API Node.js Client API Reference documentation also contains samples.

Supported Node.js Versions

Our client libraries follow the Node.js release schedule. Libraries are compatible with all current active and maintenance versions of Node.js. If you are using an end-of-life version of Node.js, we recommend that you update as soon as possible to an actively supported LTS version.

Google's client libraries support legacy versions of Node.js runtimes on a best-efforts basis with the following warnings:

• Legacy versions are not tested in continuous integration.
• Some security patches and features cannot be backported.
• Dependencies cannot be kept up-to-date.

Client libraries targeting some end-of-life versions of Node.js are available, and can be installed through npm dist-tags. The dist-tags follow the naming convention legacy-(version). For example, npm install @googlemaps/routeoptimization@legacy-8 installs client libraries for versions compatible with Node.js 8.

Versioning

This library follows Semantic Versioning.

This library is considered to be in preview. This means it is still a work-in-progress and under active development. Any release is subject to backwards-incompatible changes at any time.

More Information: Google Cloud Platform Launch Stages

Contributing

Contributions welcome! See the Contributing Guide.

Please note that this README.md, the samples/README.md, and a variety of configuration files in this repository (including .nycrc and tsconfig.json) are generated from a central template. To edit one of these files, make an edit to its templates in directory.

License

Apache Version 2.0

See LICENSE