Exemplos de planejar um trajeto

É possível usar o método ComputeCustomRoutes em uma solicitação e resposta HTTP ou com qualquer linguagem compatível com o gRPC, incluindo Java e Go.

Exemplos de HTTP

O exemplo a seguir demonstra uma solicitação e resposta de curl de exemplo.

Solicitação:

curl -X POST -d '{
  "origin":{
    "location":{
      "latLng":{
        "latitude":37.419734,
        "longitude":-122.0827784
      }
    }
  },
  "destination":{
    "location":{
      "latLng":{
        "latitude":37.417670,
        "longitude":-122.079595
      }
    }
  },
  "travelMode":"DRIVE",
  "routingPreference":"TRAFFIC_AWARE",
  "routeObjective": {
    "rateCard":{
      "costPerMinute":{
         "value":1.1
      },
      "costPerKm":{
         "value":2.2
      }
    }
  }
}' \
-H 'Content-Type: application/json' \
-H 'X-Goog-Api-Key: <YOUR_API_KEY>' \
-H 'X-Goog-FieldMask: routes.route.distanceMeters,routes.route.duration,routes.token,routes.route.travelAdvisory.tollInfo' \
'https://routespreferred.googleapis.com/v1alpha:computeCustomRoutes'

Resposta:

{
  "routes": [
    {
      "route": {
        "distanceMeters": 987,
        "duration": "247s",
        "travelAdvisory": {
          "tollInfo": {}
        }
      },
      "token": "CocCCnYKCNOX2XMIWqf2EihazE0WzZ87txlU4F74nQiWxZpgRgOzf3TMHUm1sVpY4APnvf_BWoEYGibs64nuCxYcsQEXqQjaChCLGOkBHNseoyoAmAG1CxbkG58hEhJ4FiIBKkIJbwqHAz2qAhZfSgivvZI-AACAP3gBEAQaigEKhwEKLAohChYIAxISCgcQARiAwtcvEgcQAhiAhK9fEQAAAAAAAPA_EareoBH6vShAEg4IABADEAYYAkIEGgIIBRoGCgQIAhACIj8KNjIwMjAtMDYtMTB8MTI6NTY6MzcuODg3OTEzLTA3fDEwLjk5LjE5OS4xNnwtMTA3Mjc4OTI3MhCHwajvnhs"
    }
  ]
}

O token de rota na resposta ComputeCustomRoutes precisa ser transmitido ao SDK de navegação para iniciar uma sessão de navegação, que tenta seguir a rota retornada pela API Routes Preferred. Os tokens de rota não expiram, mas, devido às condições dinâmicas das vias, as rotas geradas com um determinado token podem ser diferentes da rota original. Recomendamos usar o token de rota alguns minutos após a geração dele.

Para mais informações sobre tokens de rota, consulte a documentação do SDK do Navigation para Android e do SDK do Navigation para iOS:

Exemplos de Java e Go

Os exemplos a seguir mostram como chamar o método ComputeCustomRoutes com Java ou Go. Consulte os repositórios correspondentes do GitHub para Java e Go e instruções de criação.

Java

package com.example;

import com.google.maps.routes.v1.ComputeCustomRoutesRequest;
import com.google.maps.routes.v1.ComputeCustomRoutesResponse;
import com.google.maps.routes.v1.Location;
import com.google.maps.routes.v1.PolylineQuality;
import com.google.maps.routes.v1.RouteModifiers;
import com.google.maps.routes.v1.RouteObjective;
import com.google.maps.routes.v1.RouteObjective.RateCard;
import com.google.maps.routes.v1.RouteObjective.RateCard.MonetaryCost;
import com.google.maps.routes.v1.RouteTravelMode;
import com.google.maps.routes.v1.RoutingPreference;
import com.google.maps.routes.v1.Units;
import com.google.maps.routes.v1.Waypoint;
import com.google.maps.routes.v1alpha.RoutesAlphaGrpc;
import com.google.type.LatLng;
import io.grpc.CallOptions;
import io.grpc.Channel;
import io.grpc.ClientCall;
import io.grpc.ClientInterceptor;
import io.grpc.ClientInterceptors;
import io.grpc.ForwardingClientCall;
import io.grpc.Metadata;
import io.grpc.MethodDescriptor;
import io.grpc.StatusRuntimeException;
import io.grpc.netty.NettyChannelBuilder;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;

public class RoutesPreferredCustomRoutesClient {
  // For more detail on inserting API keys, see:
  // https://cloud.google.com/endpoints/docs/grpc/restricting-api-access-with-api-keys#java
  // For more detail on system parameters (such as FieldMask), see:
  // https://cloud.google.com/apis/docs/system-parameters
  private static final class RoutesPreferredInterceptor implements ClientInterceptor {
    private final String apiKey;
    private static final Logger logger =
        Logger.getLogger(RoutesPreferredInterceptor.class.getName());
    private static Metadata.Key<String> API_KEY_HEADER =
        Metadata.Key.of("x-goog-api-key", Metadata.ASCII_STRING_MARSHALLER);
    private static Metadata.Key<String> FIELD_MASK_HEADER =
        Metadata.Key.of("x-goog-fieldmask", Metadata.ASCII_STRING_MARSHALLER);

    public RoutesPreferredInterceptor(String apiKey) {
      this.apiKey = apiKey;
    }

    @Override
    public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(
        MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, Channel next) {
      logger.info("Intercepted " + method.getFullMethodName());
      ClientCall<ReqT, RespT> call = next.newCall(method, callOptions);
      call =
          new ForwardingClientCall.SimpleForwardingClientCall<ReqT, RespT>(call) {
            @Override
            public void start(Listener<RespT> responseListener, Metadata headers) {
              headers.put(API_KEY_HEADER, apiKey);
              // Note that setting the field mask to * is OK for testing, but discouraged in
              // production. For example, for ComputeCustomRoutes, set the field mask to
              // "routes.route.duration,routes.route.distanceMeters,routes.route.polyline"
              // in order to get the route distances, durations, and encoded polylines.
              headers.put(FIELD_MASK_HEADER, "*");
              super.start(responseListener, headers);
            }
          };
      return call;
    }
  }

  private static final Logger logger =
      Logger.getLogger(RoutesPreferredCustomRoutesClient.class.getName());
  private final RoutesAlphaGrpc.RoutesAlphaBlockingStub blockingStub;

  public RoutesPreferredCustomRoutesClient(Channel channel) {
    blockingStub = RoutesAlphaGrpc.newBlockingStub(channel);
  }

  public static Waypoint createWaypointForLatLng(double lat, double lng) {
    return Waypoint.newBuilder()
        .setLocation(
            Location.newBuilder().setLatLng(LatLng.newBuilder().setLatitude(lat).setLongitude(lng)))
        .build();
  }

  public void computeCustomRoutes() {
    ComputeCustomRoutesRequest request =
        ComputeCustomRoutesRequest.newBuilder()
            .setOrigin(createWaypointForLatLng(37.420761, -122.081356))
            .setDestination(createWaypointForLatLng(37.420999, -122.086894))
            .setRouteObjective(
                RouteObjective.newBuilder()
                    .setRateCard(
                        RateCard.newBuilder()
                            .setCostPerMinute(MonetaryCost.newBuilder().setValue(1.1))))
            .setTravelMode(RouteTravelMode.DRIVE)
            .setRoutingPreference(RoutingPreference.TRAFFIC_AWARE)
            .setUnits(Units.METRIC)
            .setLanguageCode("en-us")
            .setRouteModifiers(
                RouteModifiers.newBuilder()
                    .setAvoidTolls(false)
                    .setAvoidHighways(true)
                    .setAvoidFerries(true))
            .setPolylineQuality(PolylineQuality.OVERVIEW)
            .build();
    ComputeCustomRoutesResponse response;
    try {
      logger.info("About to send request: " + request.toString());
      response =
          blockingStub.withDeadlineAfter(2000, TimeUnit.MILLISECONDS).computeCustomRoutes(request);
    } catch (StatusRuntimeException e) {
      logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus());
      return;
    }
    logger.info("Response: " + response.toString());
  }

  public static void main(String[] args) throws Exception {
    String apiKey = System.getenv("GOOGLE_MAPS_API_KEY");

    // The standard TLS port is 443
    Channel channel = NettyChannelBuilder.forAddress("routespreferred.googleapis.com", 443).build();
    channel = ClientInterceptors.intercept(channel, new RoutesPreferredInterceptor(apiKey));

    RoutesPreferredCustomRoutesClient client = new RoutesPreferredCustomRoutesClient(channel);
    client.computeCustomRoutes();
  }
}
RoutesPreferredCustomRoutesClient.java

Go

package main

import (
	"context"
	"crypto/tls"
	"log"
	"os"
	"time"

	"github.com/golang/protobuf/proto"
	v1 "google.golang.org/genproto/googleapis/maps/routes/v1"
	v1alpha "google.golang.org/genproto/googleapis/maps/routes/v1alpha"
	"google.golang.org/genproto/googleapis/type/latlng"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials"
	"google.golang.org/grpc/metadata"
)

const (
	serverAddr = "routespreferred.googleapis.com:443"
	// Note that setting the field mask to * is OK for testing, but discouraged in
	// production.
	// For example, for ComputeRoutes, set the field mask to
	// "routes.distanceMeters,routes.duration,routes.polyline.encodedPolyline"
	// in order to get the route distances, durations, and encoded polylines.
	fieldMask = "*"
)

func createWaypoint(lat float64, lng float64) *v1.Waypoint {
	return &v1.Waypoint{LocationType: &v1.Waypoint_Location{
		Location: &v1.Location{
			LatLng: &latlng.LatLng{Latitude: lat, Longitude: lng},
		},
	}}
}

func callComputeCustomRoutes(client v1alpha.RoutesAlphaClient, ctx *context.Context) {
	request := v1.ComputeCustomRoutesRequest{
		Origin:      createWaypoint(37.420761, -122.081356),
		Destination: createWaypoint(37.420999, -122.086894),
		RouteObjective: &v1.RouteObjective{
			Objective: &v1.RouteObjective_RateCard_{
				RateCard: &v1.RouteObjective_RateCard{
					CostPerMinute: &v1.RouteObjective_RateCard_MonetaryCost{Value: 1.1},
				},
			},
		},
		TravelMode:        v1.RouteTravelMode_DRIVE,
		RoutingPreference: v1.RoutingPreference_TRAFFIC_AWARE,
		Units:             v1.Units_METRIC,
		LanguageCode:      "en-us",
		RouteModifiers: &v1.RouteModifiers{
			AvoidTolls:    false,
			AvoidHighways: true,
			AvoidFerries:  true,
		},
		PolylineQuality: v1.PolylineQuality_OVERVIEW,
	}
	marshaler := proto.TextMarshaler{}
	log.Printf("Sending request: \n%s", marshaler.Text(&request))
	result, err := client.ComputeCustomRoutes(*ctx, &request)

	if err != nil {
		log.Fatalf("Failed to call ComputeCustomRoutes: %v", err)
	}
	log.Printf("Result: %s", marshaler.Text(result))
}

func main() {
	config := tls.Config{}
	conn, err := grpc.Dial(serverAddr,
		grpc.WithTransportCredentials(credentials.NewTLS(&config)))
	if err != nil {
		log.Fatalf("Failed to connect: %v", err)
	}
	defer conn.Close()
	client := v1alpha.NewRoutesAlphaClient(conn)
	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
	ctx = metadata.AppendToOutgoingContext(ctx, "X-Goog-Api-Key", os.Getenv("GOOGLE_MAPS_API_KEY"))
	ctx = metadata.AppendToOutgoingContext(ctx, "X-Goog-Fieldmask", fieldMask)
	defer cancel()

	callComputeCustomRoutes(client, &ctx)
}

client_compute_custom_routes.go

Exemplos de cálculo de tarifas de pedágio

O exemplo a seguir usa o método computeCustomRoutes para retornar informações sobre pedágios em um trajeto com um preço estimado quando uma tag de pedágio é usada.

Esse recurso é ativado com a máscara de campo routes.travelAdvisory.tollInfo especificada na solicitação. O pedágio é especificado no campo route_modifiers. O preço do pedágio retornado é baseado no preço usado pelo cartão especificado. Se mais de um cartão for especificado, o preço mais barato será retornado.

Solicitação:

curl -X POST -d '{
  "origin":{
    "location":{
      "latLng":{
        "latitude":47.7020056,
        "longitude":-122.3479236
      }
    }
  },
  "destination":{
    "location":{
      "latLng":{
        "latitude":47.6192234,
        "longitude": -122.1676792
      }
    }
  },
  "travelMode":"DRIVE",
  "routingPreference": "TRAFFIC_AWARE_OPTIMAL",
  "routeModifiers":{
    "vehicleInfo":{
      "emissionType": "GASOLINE"
    },
    "tollPasses": [
      "US_MA_EZPASSMA",
      "US_WA_GOOD_TO_GO"
    ]
  },
  "routeObjective":{
    "rateCard":{
      "costPerMinute":{
        "value":2
      },
      "costPerKm":{
        "value": 1
      },
      "includeTolls": true
    }
  }
}'\
-H 'Content-Type: application/json' \
-H 'X-Goog-Api-Key: <YOUR_API_KEY>' \
-H 'X-Goog-FieldMask: routes.route.duration,routes.route.distanceMeters,routes.route.travelAdvisory.tollInfo,routes.route.legs.travelAdvisory.tollInfo,fallbackInfo' \
'https://routespreferred.googleapis.com/v1alpha:computeCustomRoutes'

Resposta:

{
  "routes": [
    {
      "route": {
        "legs": [
          {
            "travelAdvisory": {
              "tollInfo": {
            "estimatedPrice": [
              {
                "currencyCode": "USD",
                "units": "2",
                "nanos": 700000000
              }
            ]
          }
        }
      }
    ],
    "distanceMeters": 22496,
    "duration": "1391s",
    "travelAdvisory": {
      "tollInfo": {
        "estimatedPrice": [
          {
            "currencyCode": "USD",
            "units": "2",
            "nanos": 700000000
          }
        ]
      }
    }
  ]
}

O exemplo abaixo usa o método computeCustomRoutes para retornar informações sobre pedágios em um trajeto sem estimativa de preço.

Esse recurso também é ativado com a máscara de campo routes.travelAdvisory.tollInfo especificada na solicitação. Esse é o comportamento esperado da API se os preços de pedágio não puderem ser estimados no momento da solicitação. Geralmente, a presença do campo tollInfo na resposta indica que há uma tarifa na rota.

Se você especificar include_tolls no routeObjective, mas o Google não tiver informações de preço de pedágio para a rota, a resposta conterá a alternativa routeObjective FALLBACK_RATECARD_WITHOUT_TOLL_PRICE_DATA.

Solicitação:

curl -X POST -d '{
  "origin":{
    "location":{
      "latLng":{
        "latitude":39.56227274,
        "longitude":15.12008516
      }
    }
  },
  "destination":{
    "location":{
      "latLng":{
        "latitude":39.56205718,
        "longitude": 15.12250773
      }
    }
  },
  "travelMode":"DRIVE",
  "routingPreference": "TRAFFIC_AWARE",
  "routeObjective":{
    "rateCard":{
      "costPerMinute":{
        "value":1
      },
      "costPerKm":{
        "value": 1
      },
      "includeTolls": true
    }
  }
}' \
-H 'Content-Type: application/json' \
-H 'X-Goog-Api-Key: <YOUR_API_KEY>' \
-H 'X-Goog-FieldMask: routes.route.duration,routes.route.distanceMeters,routes.route.travelAdvisory.tollInfo,routes.route.legs.travelAdvisory.tollInfo.estimatedPrice,fallbackInfo' \
'https://routespreferred.googleapis.com/v1alpha:computeCustomRoutes'

Resposta:

{
  "routes": [
    {
      "route": {
        "legs": [
          {
            "travelAdvisory": {
              "tollInfo": {}
            }
          }
        ],
        "distanceMeters": 101,
        "duration": "10s",
        "travelAdvisory": {
          "tollInfo": {}
        }
      }
    }
  ],
  "fallbackInfo": {
    "routeObjective": "FALLBACK_RATECARD_WITHOUT_TOLL_PRICE_DATA"
  }
}