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“Why JS is way to go for backend”
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GDG Cherkasy
February 15, 2019
Technology
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“Why JS is way to go for backend”
Denys Pysmennyi “Why JS is way to go for backend”
GDG Cherkasy
February 15, 2019
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Transcript
Denys Pysmennyi Why JS is a way to go for
backend
Will talk about • NodeJS to start project • NodeJS
&& Microservices • How to make back-end good again
DISCLAIMER: Language is just a tool, choose the right tool
for the right job* *JS is still the best
Some stats stackoverflow dou.ua Google searches
NodeJS awesome for small projects • Easy to start •
npm
NodeJS classic MEAN set-up
NodeJS classic MEAN set-up
NodeJS classic MEAN set-up
NodeJS classic MEAN set-up Express + ORM + Rest +
generator(blueprints) = MVC https://sailsjs.com
NodeJS classic MEAN set-up
NodeJS awesome for microservices
NodeJS awesome for microservices • Speed • Restart time •
Memory
NodeJS awesome for microservices • Speed • Restart time •
Memory
NodeJS performance • Each metric shows different result • Golang
is really good at concurrency • Js seems to be better at high concurrency then Java • PHP looks promising and scary
NodeJs performance (reqs/sec) https://medium.com/car2godevs/node-js-10-is-the-lts-the-enterprise-will-love-2395372a80c3
Ok, so how to build it?
What do we use in Taxify?
and we are hiring... • 15 million users • 500,000
drivers • 25 countries • 100+ developers • 100++ misro-services
What we use in Taxify? We’ve created our own framework
API generation Generated API Connect services Test Mocks Documentation, Visualization
Tests
Tests
Tests Component tests - balanced way for microservices Test Service
DB Mock
Tests Component tests - balanced way for microservices Test Service
DB Test Service DB Mock Mock Service DB
So how to build good backend • Good framework for
api • Good and right tests • What else?
Monitoring
Deployment
Good Backend: dependencies • Check dependencies • NPM scripts(rm -rf)
• Use NPM proxy: Verdaccio • nodesecurity.io
Good Backend: linters and code style • Little more Java,
little less Ruby • Read some Uncle Bob • Choose code style https://github.com/airbnb/javascript • Configure Eslint Tslint
Good Backend: typescript • DefinitelyTyped lib • TypeScript 3
Good Backend: async/callback • Callback are ok if you know
how to cook them • async/await • if you need more than 2 states: go with streams
Good Backend: async/callback • Callback are ok if you know
how to cook them • async/await • if you need more than 2 states: go with streams
Good Backend: some others tools • Debug: chrome://inspect debug from
browser • Deno - ts runtime from Node creator • GraphQL
Summary • Do NodeJS for fun • Do NodeJS for
enterprise • Do NodeJS good
Thank you! Denys Pysmenny
[email protected]
JavaScript developer