diff --git a/cpp/route_guide/Makefile b/cpp/route_guide/Makefile new file mode 100644 index 00000000000..131956296cb --- /dev/null +++ b/cpp/route_guide/Makefile @@ -0,0 +1,110 @@ +# +# 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 diff --git a/cpp/route_guide/helper.cc b/cpp/route_guide/helper.cc new file mode 100644 index 00000000000..d1478464636 --- /dev/null +++ b/cpp/route_guide/helper.cc @@ -0,0 +1,178 @@ +/* + * + * 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 +#include +#include +#include +#include +#include +#include +#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_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 + diff --git a/cpp/route_guide/helper.h b/cpp/route_guide/helper.h new file mode 100644 index 00000000000..65c93c1d347 --- /dev/null +++ b/cpp/route_guide/helper.h @@ -0,0 +1,50 @@ +/* + * + * 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 +#include + +namespace examples { +class Feature; + +std::string GetDbFileContent(int argc, char** argv); + +void ParseDb(const std::string& db, std::vector* feature_list); + +} // namespace examples + +#endif // GRPC_COMMON_CPP_ROUTE_GUIDE_HELPER_H_ + diff --git a/cpp/route_guide/route_guide_client.cc b/cpp/route_guide/route_guide_client.cc new file mode 100644 index 00000000000..cbf420780d6 --- /dev/null +++ b/cpp/route_guide/route_guide_client.cc @@ -0,0 +1,260 @@ +/* + * + * 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 +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#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 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 > 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 feature_distribution( + 0, feature_list_.size() - 1); + std::uniform_int_distribution delay_distribution( + 500, 1500); + + std::unique_ptr > 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 > stream( + stub_->RouteChat(&context)); + + std::thread writer([stream]() { + std::vector 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 stub_; + std::vector 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(); +} diff --git a/cpp/route_guide/route_guide_db.json b/cpp/route_guide/route_guide_db.json new file mode 100644 index 00000000000..9d6a980ab7d --- /dev/null +++ b/cpp/route_guide/route_guide_db.json @@ -0,0 +1,601 @@ +[{ + "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 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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 + * 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 +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#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_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* 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* 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(distance)); + auto secs = std::chrono::duration_cast( + end_time - start_time); + summary->set_elapsed_time(secs.count()); + + return Status::OK; + } + + Status RouteChat(ServerContext* context, + ServerReaderWriter* stream) override { + std::vector received_notes; + RouteNote note; + while (stream->Read(¬e)) { + 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_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(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; +}