Clase del Lunes 22/11/2021 (Semana B)

Últimas Prácticas

Vamos a intentar ponernos al día con las prácticas anteriores.

Lab: GraphQL-Simple-Client

• GraphQL-Simple-Client

Lab: GraphQL Subscriptions

Tenemos una nueva práctica en camino sobre las subscripciones en GraphQL:

• GraphQL Subscriptions

To understand the fundamental of Subscriptions is convenient to know these three technologies:

1. EventEmitter.
   • Review the chapter on EventEmitters.
   • If you want to practice more with the event emitters you can optionally do the lab networking.

2. Another concept that you have to know before going to GraphQL subscriptions is Async Generators. If you don’t feel confident about async generators, review these lessons:

   • Chapter Async iteration and generators of JavaScript.info (see also the repo https://github.com/ULL-MII-SYTWS-2021/learning-async-iteration-and-generators)
   • Chapter Iterables of JavaScript.info
   • Chapter Generators of JavaScript.info
   • And then optionally do the lab Async Generators: First Come First Served For Await to know more about async generators.
3. The third technoloy that it is convenient for you to know is websockets. You can optionally do the lab Websockets

References

• See folder subscriptions/hello/ in the repo crguezl/graphql-yoga-examples`
• GraphQL: Execution
• See folder subscriptions/hello/ in the repo crguezl/graphql-yoga-examples`
• Tutorial Building live chat app with GraphQL subscriptions
  • Repo crguezl/graphql-subscriptions-with-node-js
• apollographql/graphql-subscriptions)
• Realtime GraphQL Subscriptions from GRAPHQL-NODE TUTORIAL. Written by Maira Bello: Build your own GraphQL server