GraphQL real-time subscriptions

on YouTube ↗34m

" summary

Explains that GraphQL subscriptions let the client define pushed data shape and that each event re-runs the query’s resolvers (which can be expensive), shows an Apollo PubSub + WebSocket setup powering a “gith hun” demo, cites the RFC acceptance in Feb 2017 and Apollo’s JS extension from Sept, and gives a production pattern: replace in-memory PubSub with Redis/MQTT adapters so servers publish/subscribe topics (used on Meteor Galaxy) and execute stored subscription queries to scale.

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" chapters (17)

1. 0:00Intro
2. 2:44What is GraphQL
3. 3:56GraphQL application domain
4. 5:50GraphQL entry points
5. 6:29GraphQL query syntax
6. 9:22Mutations
7. 11:49Query fragments
8. 14:26Query language
9. 16:18What are subscriptions
10. 17:04Subscription lifecycle
11. 18:35Apollo extension
12. 19:12Subscriptions
13. 25:07Graphical subscriptions
14. 26:40Enrich events
15. 28:42Get subscription
16. 31:18MQTT
17. 32:13Outro

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