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Merge pull request #40 from yang-g/route

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Add a dummy implementation of route_guide in c++.
pull/3109/head
Tim Emiola 10 years ago
parent 03ae2e5c31 9f392590bb
commit 1efae2547a
6 changed files with 1407 additions and 0 deletions
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  1. 110
      cpp/route_guide/Makefile
  2. 178
      cpp/route_guide/helper.cc
  3. 50
      cpp/route_guide/helper.h
  4. 260
      cpp/route_guide/route_guide_client.cc
  5. 601
      cpp/route_guide/route_guide_db.json
  6. 208
      cpp/route_guide/route_guide_server.cc

110
cpp/route_guide/Makefile
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#
# 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.
# * Neither the name of Google Inc. nor the names of its
# 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
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
CXX = g++
CPPFLAGS = -I/usr/local/include -pthread
CXXFLAGS = -std=c++11
LDFLAGS = -L/usr/local/lib -lgpr -lgrpc -lgrpc++ -lprotobuf -lpthread -ldl
PROTOC = protoc
GRPC_CPP_PLUGIN = grpc_cpp_plugin
GRPC_CPP_PLUGIN_PATH ?= `which $(GRPC_CPP_PLUGIN)`
PROTOS_PATH = ../../protos
vpath %.proto $(PROTOS_PATH)
all: system-check route_guide_client route_guide_server
route_guide_client: route_guide.pb.o route_guide_client.o helper.o
$(CXX) $^ $(LDFLAGS) -o $@
route_guide_server: route_guide.pb.o route_guide_server.o helper.o
$(CXX) $^ $(LDFLAGS) -o $@
%.pb.cc: %.proto
$(PROTOC) -I $(PROTOS_PATH) --cpp_out=. --grpc_out=. --plugin=protoc-gen-grpc=$(GRPC_CPP_PLUGIN_PATH) $<
clean:
rm -f *.o *.pb.cc *.pb.h route_guide_client route_guide_server
# The following is to test your system and ensure a smoother experience.
# They are by no means necessary to actually compile a grpc-enabled software.
PROTOC_CMD = which $(PROTOC)
PROTOC_CHECK_CMD = $(PROTOC) --version | grep -q libprotoc.3
PLUGIN_CHECK_CMD = which $(GRPC_CPP_PLUGIN)
HAS_PROTOC = $(shell $(PROTOC_CMD) > /dev/null && echo true || echo false)
ifeq ($(HAS_PROTOC),true)
HAS_VALID_PROTOC = $(shell $(PROTOC_CHECK_CMD) 2> /dev/null && echo true || echo false)
endif
HAS_PLUGIN = $(shell $(PLUGIN_CHECK_CMD) > /dev/null && echo true || echo false)
SYSTEM_OK = false
ifeq ($(HAS_VALID_PROTOC),true)
ifeq ($(HAS_PLUGIN),true)
SYSTEM_OK = true
endif
endif
system-check:
ifneq ($(HAS_VALID_PROTOC),true)
@echo " DEPENDENCY ERROR"
@echo
@echo "You don't have protoc 3.0.0 installed in your path."
@echo "Please install Google protocol buffers 3.0.0 and its compiler."
@echo "You can find it here:"
@echo
@echo " https://github.com/google/protobuf/releases/tag/v3.0.0-alpha-1"
@echo
@echo "Here is what I get when trying to evaluate your version of protoc:"
@echo
-$(PROTOC) --version
@echo
@echo
endif
ifneq ($(HAS_PLUGIN),true)
@echo " DEPENDENCY ERROR"
@echo
@echo "You don't have the grpc c++ protobuf plugin installed in your path."
@echo "Please install grpc. You can find it here:"
@echo
@echo " https://github.com/grpc/grpc"
@echo
@echo "Here is what I get when trying to detect if you have the plugin:"
@echo
-which $(GRPC_CPP_PLUGIN)
@echo
@echo
endif
ifneq ($(SYSTEM_OK),true)
@false
endif

178
cpp/route_guide/helper.cc
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/*
*
* 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.
* * Neither the name of Google Inc. nor the names of its
* 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
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <algorithm>
#include <cctype>
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include "route_guide.pb.h"
namespace examples {
std::string GetDbFileContent(int argc, char** argv) {
std::string db_path;
std::string arg_str("--db_path");
if (argc > 1) {
std::string argv_1 = argv[1];
size_t start_position = argv_1.find(arg_str);
if (start_position != std::string::npos) {
start_position += arg_str.size();
if (argv_1[start_position] == ' ' ||
argv_1[start_position] == '=') {
db_path = argv_1.substr(start_position + 1);
}
}
} else {
db_path = "route_guide_db.json";
}
std::ifstream db_file(db_path);
if (!db_file.is_open()) {
std::cout << "Failed to open " << db_path << std::endl;
return "";
}
std::stringstream db;
db << db_file.rdbuf();
return db.str();
}
// A simple parser for the json db file. It requires the db file to have the
// exact form of [{"location": { "latitude": 123, "longitude": 456}, "name":
// "the name can be empty" }, { ... } ... The spaces will be stripped.
class Parser {
public:
explicit Parser(const std::string& db) : db_(db) {
// Remove all spaces.
db_.erase(
std::remove_if(db_.begin(), db_.end(), isspace),
db_.end());
if (!Match("[")) {
SetFailedAndReturnFalse();
}
}
bool Finished() {
return current_ >= db_.size();
}
bool TryParseOne(Feature* feature) {
if (failed_ || Finished() || !Match("{")) {
return SetFailedAndReturnFalse();
}
if (!Match(location_) || !Match("{") || !Match(latitude_)) {
return SetFailedAndReturnFalse();
}
long temp = 0;
ReadLong(&temp);
feature->mutable_location()->set_latitude(temp);
if (!Match(",") || !Match(longitude_)) {
return SetFailedAndReturnFalse();
}
ReadLong(&temp);
feature->mutable_location()->set_longitude(temp);
if (!Match("},") || !Match(name_) || !Match("\"")) {
return SetFailedAndReturnFalse();
}
size_t name_start = current_;
while (current_ != db_.size() && db_[current_++] != '"') {
}
if (current_ == db_.size()) {
return SetFailedAndReturnFalse();
}
feature->set_name(db_.substr(name_start, current_-name_start-1));
if (!Match("},")) {
if (db_[current_ - 1] == ']' && current_ == db_.size()) {
return true;
}
return SetFailedAndReturnFalse();
}
return true;
}
private:
bool SetFailedAndReturnFalse() {
failed_ = true;
return false;
}
bool Match(const std::string& prefix) {
bool eq = db_.substr(current_, prefix.size()) == prefix;
current_ += prefix.size();
return eq;
}
void ReadLong(long* l) {
size_t start = current_;
while (current_ != db_.size() && db_[current_] != ',' && db_[current_] != '}') {
current_++;
}
// It will throw an exception if fails.
*l = std::stol(db_.substr(start, current_ - start));
}
bool failed_ = false;
std::string db_;
size_t current_ = 0;
const std::string location_ = "\"location\":";
const std::string latitude_ = "\"latitude\":";
const std::string longitude_ = "\"longitude\":";
const std::string name_ = "\"name\":";
};
void ParseDb(const std::string& db, std::vector<Feature>* feature_list) {
feature_list->clear();
std::string db_content(db);
db_content.erase(
std::remove_if(db_content.begin(), db_content.end(), isspace),
db_content.end());
Parser parser(db_content);
Feature feature;
while (!parser.Finished()) {
feature_list->push_back(Feature());
if (!parser.TryParseOne(&feature_list->back())) {
std::cout << "Error parsing the db file";
feature_list->clear();
break;
}
}
std::cout << "DB parsed, loaded " << feature_list->size()
<< " features." << std::endl;
}
} // namespace examples

50
cpp/route_guide/helper.h
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/*
*
* 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.
* * Neither the name of Google Inc. nor the names of its
* 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
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef GRPC_COMMON_CPP_ROUTE_GUIDE_HELPER_H_
#define GRPC_COMMON_CPP_ROUTE_GUIDE_HELPER_H_
#include <string>
#include <vector>
namespace examples {
class Feature;
std::string GetDbFileContent(int argc, char** argv);
void ParseDb(const std::string& db, std::vector<Feature>* feature_list);
} // namespace examples
#endif // GRPC_COMMON_CPP_ROUTE_GUIDE_HELPER_H_

260
cpp/route_guide/route_guide_client.cc
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/*
*
* 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.
* * Neither the name of Google Inc. nor the names of its
* 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
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <chrono>
#include <iostream>
#include <memory>
#include <random>
#include <string>
#include <thread>
#include <grpc/grpc.h>
#include <grpc++/channel_arguments.h>
#include <grpc++/channel_interface.h>
#include <grpc++/client_context.h>
#include <grpc++/create_channel.h>
#include <grpc++/status.h>
#include <grpc++/stream.h>
#include "helper.h"
#include "route_guide.pb.h"
using grpc::ChannelArguments;
using grpc::ChannelInterface;
using grpc::ClientContext;
using grpc::ClientReader;
using grpc::ClientReaderWriter;
using grpc::ClientWriter;
using grpc::Status;
using examples::Point;
using examples::Feature;
using examples::Rectangle;
using examples::RouteSummary;
using examples::RouteNote;
using examples::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<ChannelInterface> channel,
const std::string& db)
: stub_(RouteGuide::NewStub(channel)) {
examples::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() {
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().latitude()/kCoordFactor_ << std::endl;
}
Status status = reader->Finish();
if (status.IsOk()) {
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.IsOk()) {
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.IsOk()) {
std::cout << "RouteChat rpc failed." << std::endl;
}
}
void Shutdown() { stub_.reset(); }
private:
bool GetOneFeature(const Point& point, Feature* feature) {
ClientContext context;
Status status = stub_->GetFeature(&context, point, feature);
if (!status.IsOk()) {
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) {
grpc_init();
// Expect only arg: --db_path=path/to/route_guide_db.json.
std::string db = examples::GetDbFileContent(argc, argv);
RouteGuideClient guide(
grpc::CreateChannelDeprecated("localhost:50051", ChannelArguments()),
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();
guide.Shutdown();
grpc_shutdown();
}

601
cpp/route_guide/route_guide_db.json
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[{
"location": {
"latitude": 407838351,
"longitude": -746143763
},
"name": "Patriots Path, Mendham, NJ 07945, USA"
}, {
"location": {
"latitude": 408122808,
"longitude": -743999179
},
"name": "101 New Jersey 10, Whippany, NJ 07981, USA"
}, {
"location": {
"latitude": 413628156,
"longitude": -749015468
},
"name": "U.S. 6, Shohola, PA 18458, USA"
}, {
"location": {
"latitude": 419999544,
"longitude": -740371136
},
"name": "5 Conners Road, Kingston, NY 12401, USA"
}, {
"location": {
"latitude": 414008389,
"longitude": -743951297
},
"name": "Mid Hudson Psychiatric Center, New Hampton, NY 10958, USA"
}, {
"location": {
"latitude": 419611318,
"longitude": -746524769
},
"name": "287 Flugertown Road, Livingston Manor, NY 12758, USA"
}, {
"location": {
"latitude": 406109563,
"longitude": -742186778
},
"name": "4001 Tremley Point Road, Linden, NJ 07036, USA"
}, {
"location": {
"latitude": 416802456,
"longitude": -742370183
},
"name": "352 South Mountain Road, Wallkill, NY 12589, USA"
}, {
"location": {
"latitude": 412950425,
"longitude": -741077389
},
"name": "Bailey Turn Road, Harriman, NY 10926, USA"
}, {
"location": {
"latitude": 412144655,
"longitude": -743949739
},
"name": "193-199 Wawayanda Road, Hewitt, NJ 07421, USA"
}, {
"location": {
"latitude": 415736605,
"longitude": -742847522
},
"name": "406-496 Ward Avenue, Pine Bush, NY 12566, USA"
}, {
"location": {
"latitude": 413843930,
"longitude": -740501726
},
"name": "162 Merrill Road, Highland Mills, NY 10930, USA"
}, {
"location": {
"latitude": 410873075,
"longitude": -744459023
},
"name": "Clinton Road, West Milford, NJ 07480, USA"
}, {
"location": {
"latitude": 412346009,
"longitude": -744026814
},
"name": "16 Old Brook Lane, Warwick, NY 10990, USA"
}, {
"location": {
"latitude": 402948455,
"longitude": -747903913
},
"name": "3 Drake Lane, Pennington, NJ 08534, USA"
}, {
"location": {
"latitude": 406337092,
"longitude": -740122226
},
"name": "6324 8th Avenue, Brooklyn, NY 11220, USA"
}, {
"location": {
"latitude": 406421967,
"longitude": -747727624
},
"name": "1 Merck Access Road, Whitehouse Station, NJ 08889, USA"
}, {
"location": {
"latitude": 416318082,
"longitude": -749677716
},
"name": "78-98 Schalck Road, Narrowsburg, NY 12764, USA"
}, {
"location": {
"latitude": 415301720,
"longitude": -748416257
},
"name": "282 Lakeview Drive Road, Highland Lake, NY 12743, USA"
}, {
"location": {
"latitude": 402647019,
"longitude": -747071791
},
"name": "330 Evelyn Avenue, Hamilton Township, NJ 08619, USA"
}, {
"location": {
"latitude": 412567807,
"longitude": -741058078
},
"name": "New York State Reference Route 987E, Southfields, NY 10975, USA"
}, {
"location": {
"latitude": 416855156,
"longitude": -744420597
},
"name": "103-271 Tempaloni Road, Ellenville, NY 12428, USA"
}, {
"location": {
"latitude": 404663628,
"longitude": -744820157
},
"name": "1300 Airport Road, North Brunswick Township, NJ 08902, USA"
}, {
"location": {
"latitude": 407113723,
"longitude": -749746483
},
"name": ""
}, {
"location": {
"latitude": 402133926,
"longitude": -743613249
},
"name": ""
}, {
"location": {
"latitude": 400273442,
"longitude": -741220915
},
"name": ""
}, {
"location": {
"latitude": 411236786,
"longitude": -744070769
},
"name": ""
}, {
"location": {
"latitude": 411633782,
"longitude": -746784970
},
"name": "211-225 Plains Road, Augusta, NJ 07822, USA"
}, {
"location": {
"latitude": 415830701,
"longitude": -742952812
},
"name": ""
}, {
"location": {
"latitude": 413447164,
"longitude": -748712898
},
"name": "165 Pedersen Ridge Road, Milford, PA 18337, USA"
}, {
"location": {
"latitude": 405047245,
"longitude": -749800722
},
"name": "100-122 Locktown Road, Frenchtown, NJ 08825, USA"
}, {
"location": {
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208
cpp/route_guide/route_guide_server.cc
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/*
*
* 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.
* * Neither the name of Google Inc. nor the names of its
* 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
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <algorithm>
#include <chrono>
#include <cmath>
#include <iostream>
#include <memory>
#include <string>
#include <thread>
#include <grpc/grpc.h>
#include <grpc++/server.h>
#include <grpc++/server_builder.h>
#include <grpc++/server_context.h>
#include <grpc++/status.h>
#include <grpc++/stream.h>
#include "helper.h"
#include "route_guide.pb.h"
using grpc::Server;
using grpc::ServerBuilder;
using grpc::ServerContext;
using grpc::ServerReader;
using grpc::ServerReaderWriter;
using grpc::ServerWriter;
using grpc::Status;
using examples::Point;
using examples::Feature;
using examples::Rectangle;
using examples::RouteSummary;
using examples::RouteNote;
using examples::RouteGuide;
using std::chrono::system_clock;
float ConvertToRadians(float num) {
return num * 3.1415926 /180;
}
float GetDistance(const Point& start, const Point& end) {
const float kCoordFactor = 10000000.0;
float lat_1 = start.latitude() / kCoordFactor;
float lat_2 = end.latitude() / kCoordFactor;
float lon_1 = start.longitude() / kCoordFactor;
float lon_2 = end.longitude() / kCoordFactor;
float lat_rad_1 = ConvertToRadians(lat_1);
float lat_rad_2 = ConvertToRadians(lat_2);
float delta_lat_rad = ConvertToRadians(lat_2-lat_1);
float delta_lon_rad = ConvertToRadians(lon_2-lon_1);
float a = pow(sin(delta_lat_rad/2), 2) + cos(lat_rad_1) * cos(lat_rad_2) *
pow(sin(delta_lon_rad/2), 2);
float c = 2 * atan2(sqrt(a), sqrt(1-a));
int R = 6371000; // metres
return R * c;
}
std::string GetFeatureName(const Point& point,
const std::vector<Feature>& feature_list) {
for (const Feature& f : feature_list) {
if (f.location().latitude() == point.latitude() &&
f.location().longitude() == point.longitude()) {
return f.name();
}
}
return "";
}
class RouteGuideImpl final : public RouteGuide::Service {
public:
explicit RouteGuideImpl(const std::string& db) {
examples::ParseDb(db, &feature_list_);
}
Status GetFeature(ServerContext* context, const Point* point,
Feature* feature) override {
feature->set_name(GetFeatureName(*point, feature_list_));
feature->mutable_location()->CopyFrom(*point);
return Status::OK;
}
Status ListFeatures(ServerContext* context, const Rectangle* rectangle,
ServerWriter<Feature>* writer) override {
auto lo = rectangle->lo();
auto hi = rectangle->hi();
long left = std::min(lo.longitude(), hi.longitude());
long right = std::max(lo.longitude(), hi.longitude());
long top = std::max(lo.latitude(), hi.latitude());
long bottom = std::min(lo.latitude(), hi.latitude());
for (const Feature& f : feature_list_) {
if (f.location().longitude() >= left &&
f.location().longitude() <= right &&
f.location().latitude() >= bottom &&
f.location().latitude() <= top) {
writer->Write(f);
}
}
return Status::OK;
}
Status RecordRoute(ServerContext* context, ServerReader<Point>* reader,
RouteSummary* summary) override {
Point point;
int point_count = 0;
int feature_count = 0;
float distance = 0.0;
Point previous;
system_clock::time_point start_time = system_clock::now();
while (reader->Read(&point)) {
point_count++;
if (!GetFeatureName(point, feature_list_).empty()) {
feature_count++;
}
if (point_count != 1) {
distance += GetDistance(previous, point);
}
previous = point;
}
system_clock::time_point end_time = system_clock::now();
summary->set_point_count(point_count);
summary->set_feature_count(feature_count);
summary->set_distance(static_cast<long>(distance));
auto secs = std::chrono::duration_cast<std::chrono::seconds>(
end_time - start_time);
summary->set_elapsed_time(secs.count());
return Status::OK;
}
Status RouteChat(ServerContext* context,
ServerReaderWriter<RouteNote, RouteNote>* stream) override {
std::vector<RouteNote> received_notes;
RouteNote note;
while (stream->Read(&note)) {
for (const RouteNote& n : received_notes) {
if (n.location().latitude() == note.location().latitude() &&
n.location().longitude() == note.location().longitude()) {
stream->Write(n);
}
}
received_notes.push_back(note);
}
return Status::OK;
}
private:
std::vector<Feature> feature_list_;
};
void RunServer(const std::string& db_path) {
std::string server_address("0.0.0.0:50051");
RouteGuideImpl service(db_path);
ServerBuilder builder;
builder.AddPort(server_address);
builder.RegisterService(&service);
std::unique_ptr<Server> server(builder.BuildAndStart());
std::cout << "Server listening on " << server_address << std::endl;
while (true) {
std::this_thread::sleep_for(std::chrono::seconds(5));
}
}
int main(int argc, char** argv) {
grpc_init();
// Expect only arg: --db_path=path/to/route_guide_db.json.
std::string db = examples::GetDbFileContent(argc, argv);
RunServer(db);
grpc_shutdown();
return 0;
}
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