node-graceful-sample

index.js

//                   _                                      __       _       _           _
//   _ __   ___   __| | ___        __ _ _ __ __ _  ___ ___ / _|_   _| |     | |_ ___ ___| |_
//  | '_ \ / _ \ / _` |/ _ \_____ / _` | '__/ _` |/ __/ _ \ |_| | | | |_____| __/ _ \ __| __|
//  | | | | (_) | (_| |  __/_____| (_| | | | (_| | (__  __/  _| |_| | |_____| |_  __\__ \ |_
//  |_| |_|\___/ \__,_|\___|      \__, |_|  \__,_|\___\___|_|  \__,_|_|      \__\___|___/\__|
//                                |___/                                                       *
//  This examples shows that noce-graceful can be used across the project with no issues
//  We can attach multiple listeners, the app will quit once all listeners are resolved.
//  We can do this by calling done() ---> registerWithSetTimeout
//  or we can do this by returning a promise ---> registerWithPromise
//
//  To start: node index.js
//  Do ctrl + C to quit
//
//

/**
 * @type {{Graceful} | Graceful}
 */
var Graceful = require('node-graceful');
var http = require('http');
process.on('exit', function(){
	console.log('exit');
});

let delay = function (duration) {
	return new Promise(((resolve) => {
		setTimeout(() => {
			resolve()
		}, duration)
	}))
};
let id = 0;

let registerWithSetTimeout = function (name, duration) {
	Graceful.on('exit', async function (done, event, signal) {
		id++;
		console.log({
			name, id,  event, signal
		});
		setTimeout(() => {
			console.log('Done with ' + name);
			done();

		}, duration)
	})
};

let registerWithPromise = function (name, duration) {
	Graceful.on('exit', async function (done, event, signal) {
		id++;
		console.log({
			name, id, event, signal
		});
		await delay(duration);
		console.log('Done with ' + name)
	})
};

registerWithSetTimeout('Calling done() method', 3000);
registerWithPromise('Returning a promise ', 5000);

var server = http.createServer();
server.listen(5000);