Hállex da Silva Costa HallexCosta

Pessimistic Lock with Atomicity: A Pragmatic Approach

I want to remind you that this post does not follow a chronological order, in the future I may make two new posts, one about an optimistic lock in MongoDB and another about a comparison between the two locking models.

I will use the NoSQL database (MongoDB) together Node.js and Mongoose to explain how to work with a document lock

Enjoy reading! 😃

Summary

What is atomic?
Explain use case

Overiew

The @babel/preset-flow, animate.css, wow.js and http-server are depends not required.

Required dependencies

pnpm add -D babel-loader @babel/core @babel/preset-env @babel/preset-react @rspack/cli @rspack/core @rspack/dev-server @rspack/plugin-react-refresh react-refresh css-loader sass-loader style-loader react react-dom

Atalhos do IntelliJ

Principais

Caiu no IntelliJ agora?

Aprenda só esses:

Tipo de Atalho	IntelliJ IDEA

	(() => {
	window.teste = () => console.log('Hallex was here!');
	})();
	(()=>{"use strict";var e={521:function(e,n,t){var r,a,l,o,i,u,c=t(271),s=t(537);function d(e){for(var n="https://reactjs.org/docs/error-decoder.html?invariant="+e,t=1;t<arguments.length;t++)n+="&args[]="+encodeURIComponent(arguments[t]);return"Minified React error #"+e+"; visit "+n+" for the full message or use the non-minified dev environment for full errors and additional helpful warnings."}var f=new Set,p={};function h(e,n){m(e,n),m(e+"Capture",n)}function m(e,n){for(p[e]=n,e=0;e<n.length;e++)f.add(n[e])}var g=!("undefined"==typeof window\|\|void 0===window.document\|\|void 0===window.document.createElement),y=Object.prototype.hasOwnProperty,v=/^[:A-Z_a-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD][:A-Z_a-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\

	const list = document.getElementById('list')

	const createCard = ({img: url, username}) => {
	const div = document.createElement('div')
	div.classList.add('card')

	const img = document.createElement('img')
	img.src = url

	const span = document.createElement('span')

	{
	"$schema": "https://biomejs.dev/schemas/1.8.3/schema.json",
	"organizeImports": {
	"enabled": true
	},
	"files": {
	"maxSize": 30000000
	},
	"linter": {
	"enabled": true,

	import React, { useState, useRef } from 'react';

	import {
	SafeAreaView,
	StyleSheet,
	Text,
	View,
	TouchableHighlight,
	} from 'react-native';

	const items = []
	// simulate request add item using api
	function api(id, date, country) {
	const item = {
	id,
	date,
	timestamp: Date.parse(date), // timestamp
	country
	}
	items.push(item)

	<?php
	namespace app\modules\api\services\pagarme\orders;

	class CheckoutService
	{
	private string $SECRET_API_KEY = '';
	private array $headers;
	public function __construct()
	{
	$username = $this->SECRET_API_KEY;