backend, app e internet das coisas com nodejs no google cloud platform

Backend, App e Internet das Coisas com NodeJS e

Google Cloud Platform

Alvaro Viebrantz aviebrantz.com.br @alvaroviebrantz medium.com/iot-bootcamp

1

http://aviebrantz.com.br

http://medium.com/iot-bootcamp

Alvaro Viebrantz DevMT e GDGCuiabá

Fullstack developer

aviebrantz.com.br // @alvaroviebrantz medium.com/iot-bootcamp

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Agenda

• O que é computação em nuvem. • Google Cloud Platform Overview. • NodeJS • Estudo de Caso - PacktPub Notifier

• Backend - Google App Engine • App - React Native + Firebase • IoT - Alexa Custom Skill

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38 anos

Computadores Primitivos Computadores Pessoais

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15 anos

Computadores Pessoais Internet

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12 anos

Internet Smartphones / Nuvem / Mobile

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“The more advanced we become the faster we become at

advancing”

"Marco Annunziata: Welcome to the Age of the Industrial Internet"8

4.7 bilhões de

página

A Web é gigante hoje

Era do Zetabyte*

* 1000 Exabytes

36.000 anos de video

em hd

Últimos

20 anos

http://www.livescience.com/54094-how-big-is-the-internet.html

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http://www.livescience.com/54094-how-big-is-the-internet.html

Nossa noção de sucesso mudou…

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http://press.spotify.com/us/category/pictures/

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Como isso é possível ?

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Pilares

Disponibilidade Manutenção Escalável

Economia

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Escalabilidade Horizontal

Escalabilidade VerticalX

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Porque Google Cloud Platform ?

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O Google Cloud Platform é construído na mesma infraestrutura que os serviços do google rodam

• Rede Global • Redundância • Infraestrutura inovadora

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Regiões

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Vantagens

Preço (Cobrança por minuto)

Maquinas Customizáveis (até GPU) Facilmente Escalável

Developer Experience ❤

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Estudo de Caso

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Estudo de CasoPacktPub Notifier

Backend

App

IoT

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Node.js

• Engine V8 do Google Chrome

• Rápido e escalável

• Orientado a eventos e não bloqueante

• Muito leve

• Perfeito para aplicações real-time

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É apenas Javascript

• Navegador

• Server side

• Desktop - Electron e NW

• Mobile - Cordova, Ionic, React Native, etc.

• Embarcado - Mongoose OS e Espruino

• Geladeira, torradeira, etc

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Ecossistema rico

• Muitas ferramentas feitas com Node

• Webpack ❤

• Gerenciadores de pacotes

• NPM e Yarn

• Editores

• Visual Studio Code, Atom, Webstorm

• Mais de 450 mil pacotes no npmjs.com

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http://npmjs.com

Web Frameworks

• Express.js

• Hapi.js

• Koa

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Stack escolhido

• Hapi.js no Backend

• Aplicativos iOS e Android nativos com React Native

• Vários serviços do GCP

• Database, Cron, Tasks, HTTPS, etc

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PacktPub Notifier v0.1

iOS e Android

Packt Publishing

Website

Backend

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Hello World com HapiJS

const Hapi = require('hapi'); const server = new Hapi.Server();

server.connection({ host: '0.0.0.0', port: process.env.PORT || 8080 });

server.route({ method: 'GET', path: '/api/tasks/fetch-books', config: { handler: (request, reply) => { reply({ message: 'Hello World'}) } } });

server.start((err) => { if (err) { throw err; } });

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Web Scrapping

'use strict';

const cheerio = require('cheerio'); const fetch = require('node-fetch'); const urlFreeLearning = 'http://www.packtpub.com/packt/offers/free-learning/';

class PackPubCrawler { /* Código omitido */

async fetchBooksFromPacktPub() { let body = await this.fetchPageBody(); let documentSelector = cheerio.load(body);

let currentBook = this.scrapeCurrentBook(documentSelector);

return { currentBook }; } }

module.exports = PackPubCrawler;

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Api de Livros

'use strict';

const Boom = require('boom'); const PackPubCrawler = require('../PacktPubCrawler');

module.exports = { method: 'GET', path: '/api/books', config: { handler: async (request, reply) => { try {

const crawler = new PackPubCrawler(); let books = await crawler.fetchBooksFromPacktPub(); console.log('Success Fetching Books'); reply({ books }); } catch (e) { console.log('Error Fetching Books', e); reply(Boom.badGateway('Xablau', e)) } } } }

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Api de Livros

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Nuvem

IaaSInfrastructre as a Service

CaaSContainer/Cluster as a

Service

PaaSPlatform as a Service

SaaSSoftware as a Service

GoogleVocê

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Nuvem

IaaSInfrastructre as a Service

On Premise PaaSPlatform as a Service

SaaSSoftware as a Service

• Aplicação • Dados • Runtime • Middleware • SO • Virtualização • Servidores • Storage • Redes




Gerenciado por você

Gerenciado magicamente45

Google App Engine - Standard vs Flexible

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https://googlecloudplatform.github.io/google-cloud-node

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1. Instale o Cloud SDK (cli)

2. Configure o app.yaml

3. cloud app deploy

https://cloud.google.com/sdk/

runtime: nodejs env: flex

skip_files: - ^node_modules$

resources: cpu: .5 memory_gb: .6 disk_size_gb: 10

manual_scaling: instances: 1

#automatic_scaling: # min_num_instances: 1 # max_num_instances: 1 # cool_down_period_sec: 120 # cpu_utilization: # target_utilization: 0.8

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PacktPub Notifier v0.1 - Fail

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Really slow rest api

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iOS e Android

Packt Publishing

Website

Storage Database

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We need a database

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NoSQL escolhido - Flexibilidade

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Serviço de Livros - Salvandoconst Datastore = require('@google-cloud/datastore');

// Instantiates a client const datastore = Datastore({ projectId: config.projectId });

const kind = 'Book';

class BookService { /* Codigo omitido */ async save(book) { let slug = this.getSlug(book); book.slug = slug; const bookKey = datastore.key([kind, slug]);

let bookEntity = { key: bookKey, data: book };

return datastore.save(bookEntity); } }

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Serviço de Livros - Consulta

// The kind for the new entity const kind = 'Book';

class BookService { /* Codigo omitido */

async all() { const query = datastore.createQuery(kind) .order('date', { descending: true }); let results = await datastore.runQuery(query); return results[0]; } }

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API de tarefa de busca e armazenamento de livros

module.exports = { method: 'GET', path: '/api/tasks/fetch-books', config: { handler: async (request, reply) => { const crawler = new PackPubCrawler(); let books = await crawler.fetchBooksFromPacktPub(); const service = new BooksService();

let slug = service.getSlug(books.currentBook); let exists = await service.exists(slug); if (!exists) { // Save new book await service.save(books.currentBook); //TODO: Notify clients that subscribed to this } reply({ books }); } } }

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API de Livros

const BooksService = require('../BooksService');

module.exports = { method: 'GET', path: '/api/books', config: { handler: async (request, reply) => { let service = new BooksService(); let books = await service.all(); reply({ books }); } } }

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API de Livros

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Datastore console

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iOS e Android

Packt Publishing

Website

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Agendamento de tarefas

Como fazer em ambiente distribuido ?

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Agendamento de tarefas

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Agendamento de tarefas - Gambiarra

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1. Sintaxe do unix cron ou mais natural

2. Configure um cron.yaml

3. cloud app deploy cron.yaml

Google App Engine - cron.yaml

cron: - description: fetch book every 30 mins url: /api/tasks/fetch-books schedule: every 30 mins target: default

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Google App Engine - cron.yaml

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Google App Engine - Logs, monitoramento e trace

1. Pacote @google/cloud-trace

2. Just works

if (process.env.NODE_ENV === 'production') { require('@google/cloud-trace').start(); }

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iOS e Android

Packt Publishing

Website

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Push Notifications

72% Abrem o app quando

recebe uma notificação

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Fluxo Push Notifications

Android iOS

Backend

GCM APNS

Device Token

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Client Side - React Native

import Firestack from 'react-native-firestack'; import FCM from 'react-native-fcm';

const TOPIC_NAME = 'receive_book_notification';

async subscribe() { let { wantsToReceiveNotifications } = this.state; if (!wantsToReceiveNotifications) { FCM.requestPermissions(); FCM.subscribeToTopic(TOPIC_NAME); firestack.analytics.logEventWithName('subscribe', {}); } else { FCM.unsubscribeFromTopic(TOPIC_NAME); firestack.analytics.logEventWithName('unsubscribe', {}); } this.setState({ wantsToReceiveNotifications: !wantsToReceiveNotifications }) }

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Firebase Analytics e Push

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iOS e Android


Packt Publishing

Website

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Fluxo Alexa Custom Skill

Backend

Usuário

Alexa, Ask Packt Publishing Fan what’s the book of the day

The free book of the day is title Learning Raspberry Pi

Alexa SkillHTTPS

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Api de integração com a Alexaconst BooksService = require('../BooksService');

module.exports = { method: 'POST', path: '/api/alexa', config: { handler: async (request, reply) => { let service = new BooksService(); let book = await service.getLastBook(); let message = `The free book of the day is titled ${book.title}`; reply({ "version": "1.0", "sessionAttributes": {}, "response": { "shouldEndSession": true, "outputSpeech": { "type": "SSML", "ssml": `<speak>${message}</speak>` }, } }); } } } 82

PacktPub Notifier - Final

iOS e Android

Amazon Echo

Alexa Custom

Skill

Packt Publishing

Website

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Futuro ?

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• Funções escritas em NodeJS • Escalabilidade automatica • Serverless • Podem ser chamadas por eventos

• Mudanças de arquivo, banco, http, etc.

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Serverless

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Duvidas ?

Alvaro Viebrantz aviebrantz.com.br @alvaroviebrantz medium.com/iot-bootcamp

https://github.com/alvarowolfx/packtpub-notifier-gcp

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Links úteis

• https://cloud.google.com/sdk/

• https://developers.google.com

• https://cloud.google.com/products/

• https://firebase.google.com

• https://nodejs.org/en/

• https://developer.amazon.com

• https://facebook.github.io/react-native/

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https://cloud.google.com/products/

https://firebase.google.com

https://developer.amazon.com

Referência

• https://pt.slideshare.net/FrancescoMarchitelli1/google-cloud-platform-47074110

• https://www.infoq.com/br/presentations/plataforma-digital-com-google-cloud-platform

• https://cloud.google.com/icons/

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https://pt.slideshare.net/FrancescoMarchitelli1/google-cloud-platform-47074110

https://www.infoq.com/br/presentations/plataforma-digital-com-google-cloud-platform

https://www.infoq.com/br/presentations/plataforma-digital-com-google-cloud-platform

backend, app e internet das coisas com nodejs no google cloud platform

Technology