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server.cc
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server.cc
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/*
*
* Copyright 2019 The Cloud Robotics Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <csignal>
#include <future>
#include <iostream>
#include <memory>
#include <string>
#include <thread>
#include <grpcpp/grpcpp.h>
#include "postcode.grpc.pb.h"
// Src includes
#include "src/csv_reader.h"
using grpc::Server;
using grpc::ServerBuilder;
using grpc::ServerContext;
using grpc::Status;
using postcode::PostcodeService;
using postcode::PostcodeRequest;
using postcode::PostcodeResponse;
// The gRPC server is defined globally so that SIGTERM handler can shut it
// down when Kubernetes stops the process.
std::unique_ptr<Server> server;
// Logic and data behind the server's behavior.
class PostcodeServiceImpl final : public PostcodeService::Service {
Status GetByPostcode(ServerContext* context, const PostcodeRequest* request,
PostcodeResponse* reply) override {
std::cout << "Received request: " << request->ShortDebugString()
<< std::endl;
// Creating an object of CSVWriter
CSVReader reader("references/postcodes.csv");
reply->set_postcode("1");
reply->set_zone("2");
reply->set_locality("3");
reply->set_longitude("4");
reply->set_latitude("5");
return Status::OK;
}
};
void RunServer() {
std::string server_address("0.0.0.0:50051");
PostcodeServiceImpl service;
ServerBuilder builder;
// Listen on the given address without any authentication mechanism. Cloud
// Robotics Core ensures that clients are authenticated.
builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
// Register "service" as the instance through which we'll communicate with
// clients. In this case it corresponds to a *synchronous* service.
builder.RegisterService(&service);
// Finally assemble the server.
server = builder.BuildAndStart();
std::cout << "Server listening on " << server_address << std::endl;
std::signal(SIGTERM, [](int) {
// When SIGTERM is received, shutdown the gRPC server.
server->Shutdown();
});
// Wait for the server to shutdown.
server->Wait();
}
int main(int argc, char** argv) {
RunServer();
return 0;
}