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route_guide_client.cc 8.36 KiB
/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
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* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
#include <chrono>
#include <iostream>
#include <memory>
#include <random>
#include <string>
#include <thread>
#include <grpc/grpc.h>
#include <grpc++/channel.h>
#include <grpc++/client_context.h>
#include <grpc++/create_channel.h>
#include <grpc++/security/credentials.h>
#include "helper.h"
#include "route_guide.grpc.pb.h"
using grpc::Channel;
using grpc::ClientContext;
using grpc::ClientReader;
using grpc::ClientReaderWriter;
using grpc::ClientWriter;
using grpc::Status;
using routeguide::Point;
using routeguide::Feature;
using routeguide::Rectangle;
using routeguide::RouteSummary;
using routeguide::RouteNote;
using routeguide::RouteGuide;
Point MakePoint(long latitude, long longitude) {
Point p;
p.set_latitude(latitude);
p.set_longitude(longitude);
return p;
}
Feature MakeFeature(const std::string& name,
long latitude, long longitude) { Feature f;
f.set_name(name);
f.mutable_location()->CopyFrom(MakePoint(latitude, longitude));
return f;
}
RouteNote MakeRouteNote(const std::string& message,
long latitude, long longitude) {
RouteNote n;
n.set_message(message);
n.mutable_location()->CopyFrom(MakePoint(latitude, longitude));
return n;
}
class RouteGuideClient {
public:
RouteGuideClient(std::shared_ptr<Channel> channel, const std::string& db)
: stub_(RouteGuide::NewStub(channel)) {
routeguide::ParseDb(db, &feature_list_);
}
void GetFeature() {
Point point;
Feature feature;
point = MakePoint(409146138, -746188906);
GetOneFeature(point, &feature);
point = MakePoint(0, 0);
GetOneFeature(point, &feature);
}
void ListFeatures() {
routeguide::Rectangle rect;
Feature feature;
ClientContext context;
rect.mutable_lo()->set_latitude(400000000);
rect.mutable_lo()->set_longitude(-750000000);
rect.mutable_hi()->set_latitude(420000000);
rect.mutable_hi()->set_longitude(-730000000);
std::cout << "Looking for features between 40, -75 and 42, -73"
<< std::endl;
std::unique_ptr<ClientReader<Feature> > reader(
stub_->ListFeatures(&context, rect));
while (reader->Read(&feature)) {
std::cout << "Found feature called "
<< feature.name() << " at "
<< feature.location().latitude()/kCoordFactor_ << ", "
<< feature.location().longitude()/kCoordFactor_ << std::endl;
}
Status status = reader->Finish();
if (status.ok()) {
std::cout << "ListFeatures rpc succeeded." << std::endl;
} else {
std::cout << "ListFeatures rpc failed." << std::endl;
}
}
void RecordRoute() {
Point point;
RouteSummary stats;
ClientContext context;
const int kPoints = 10;
unsigned seed = std::chrono::system_clock::now().time_since_epoch().count();
std::default_random_engine generator(seed);
std::uniform_int_distribution<int> feature_distribution(
0, feature_list_.size() - 1);
std::uniform_int_distribution<int> delay_distribution(
500, 1500);
std::unique_ptr<ClientWriter<Point> > writer(
stub_->RecordRoute(&context, &stats));
for (int i = 0; i < kPoints; i++) {
const Feature& f = feature_list_[feature_distribution(generator)];
std::cout << "Visiting point "
<< f.location().latitude()/kCoordFactor_ << ", "
<< f.location().longitude()/kCoordFactor_ << std::endl;
if (!writer->Write(f.location())) {
// Broken stream.
break;
}
std::this_thread::sleep_for(std::chrono::milliseconds(
delay_distribution(generator)));
}
writer->WritesDone();
Status status = writer->Finish();
if (status.ok()) {
std::cout << "Finished trip with " << stats.point_count() << " points\n"
<< "Passed " << stats.feature_count() << " features\n"
<< "Travelled " << stats.distance() << " meters\n"
<< "It took " << stats.elapsed_time() << " seconds"
<< std::endl;
} else {
std::cout << "RecordRoute rpc failed." << std::endl;
}
}
void RouteChat() {
ClientContext context;
std::shared_ptr<ClientReaderWriter<RouteNote, RouteNote> > stream(
stub_->RouteChat(&context));
std::thread writer([stream]() {
std::vector<RouteNote> notes{
MakeRouteNote("First message", 0, 0),
MakeRouteNote("Second message", 0, 1),
MakeRouteNote("Third message", 1, 0),
MakeRouteNote("Fourth message", 0, 0)};
for (const RouteNote& note : notes) {
std::cout << "Sending message " << note.message()
<< " at " << note.location().latitude() << ", "
<< note.location().longitude() << std::endl;
stream->Write(note);
}
stream->WritesDone();
});
RouteNote server_note;
while (stream->Read(&server_note)) {
std::cout << "Got message " << server_note.message()
<< " at " << server_note.location().latitude() << ", "
<< server_note.location().longitude() << std::endl;
}
writer.join();
Status status = stream->Finish();
if (!status.ok()) {
std::cout << "RouteChat rpc failed." << std::endl;
}
}
private:
bool GetOneFeature(const Point& point, Feature* feature) {
ClientContext context;
Status status = stub_->GetFeature(&context, point, feature);
if (!status.ok()) {
std::cout << "GetFeature rpc failed." << std::endl;
return false; }
if (!feature->has_location()) {
std::cout << "Server returns incomplete feature." << std::endl;
return false;
}
if (feature->name().empty()) {
std::cout << "Found no feature at "
<< feature->location().latitude()/kCoordFactor_ << ", "
<< feature->location().longitude()/kCoordFactor_ << std::endl;
} else {
std::cout << "Found feature called " << feature->name() << " at "
<< feature->location().latitude()/kCoordFactor_ << ", "
<< feature->location().longitude()/kCoordFactor_ << std::endl;
}
return true;
}
const float kCoordFactor_ = 10000000.0;
std::unique_ptr<RouteGuide::Stub> stub_;
std::vector<Feature> feature_list_;
};
int main(int argc, char** argv) {
// Expect only arg: --db_path=path/to/route_guide_db.json.
std::string db = routeguide::GetDbFileContent(argc, argv);
RouteGuideClient guide(
grpc::CreateChannel("localhost:50051",
grpc::InsecureChannelCredentials()),
db);
std::cout << "-------------- GetFeature --------------" << std::endl;
guide.GetFeature();
std::cout << "-------------- ListFeatures --------------" << std::endl;
guide.ListFeatures();
std::cout << "-------------- RecordRoute --------------" << std::endl;
guide.RecordRoute();
std::cout << "-------------- RouteChat --------------" << std::endl;
guide.RouteChat();
return 0;
}