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index.js
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index.js
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/* eslint-disable global-require */
const express = require('express');
require('dotenv').config();
const cluster = require('cluster');
const os = require('os');
const {
app,
server,
socketServer,
serverSecure,
socketServerSecure,
} = require('./config/socket');
const { logger } = require('./config/logger');
const { slog } = require('./util/simpleLog');
app.use(express.json());
require('./config/db');
function serverStart(port) {
if (JSON.parse(process.env.HTTPS)) {
require('./config/appConfiguration')(app, socketServerSecure);
return serverSecure.listen(port, () => {
logger.info(`server is up on https://localhost:${port}`);
});
}
require('./config/appConfiguration')(app, socketServer);
return server.listen(port, () => {
logger.info(`server is up on http://localhost:${port}`);
});
}
function forkCPUs(serverReady) {
// we can use process.env.WEB_CONCURRENCY if we know server concurrent connections that can handle
const CPUS = os.cpus();
if (cluster.isMaster) {
CPUS.forEach(() => {
cluster.fork();
});
cluster.on('listening', (worker) => {
logger.info(`Worker Process ID: ${worker.process.pid}, Worker ID is: ${worker.id}`);
});
cluster.on('disconnect', (worker) => {
logger.info(`Worker Process ID: ${worker.process.pid}, Worker ID is: ${worker.id}`);
});
cluster.on('exit', (worker) => {
// Ensuring a new cluster will start if an old one dies
logger.info(`Worker Process ID: ${worker.process.pid}, Worker ID is: ${worker.id}`);
cluster.fork();
});
} else {
return serverReady(process.env.PORT);
}
return false;
}
if (process.env.NODE_ENV === 'production') {
forkCPUs(serverStart);
} else {
serverStart(process.env.PORT);
}
// we can useuser socketServer or socketServerSecure if https enabled
// however there is io poperty in res.locals whcih is socket server
// and we can use with any place on the app\
// test for socket connection
socketServer.on('connection', (socket) => {
socket.on('cool', data => slog(data));
setInterval(() => {
socket.emit('welcome', { message: 'welcome to the socket server', time: Date() });
}, 1000);
});