// Copyright 2017 Google LLC

//

// 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.

'use strict';

const path = require('path');

const PROTO_PATH = path.join(__dirname, '/protos/helloworld.proto');

const grpc = require('grpc');

const helloProto = grpc.load(PROTO_PATH).helloworld;

// Implement the SayHello RPC method.

const sayHello = (call, callback) => {

callback(null, {message: `Hello ${call.request.name}`});

};

// Start an RPC server to handle Greeter service requests

const startServer = (PORT) => {

const server = new grpc.Server();

server.addProtoService(helloProto.Greeter.service, {sayHello: sayHello});

server.bind(`0.0.0.0:${PORT}`, grpc.ServerCredentials.createInsecure());

server.start();

};

// The command-line program

const {argv} = require('yargs')

.usage('Usage: node $0 [-p PORT]')

.option('port', {

alias: 'p',

type: 'number',

default: 50051,

global: true,

})

.wrap(120)

.epilogue(

`For more information, see https://cloud.google.com/endpoints/docs`

);

startServer(argv.port);