Async await functions in ruby
- 1. Async/Await functions in Ruby Sat, Dec. 14th, 2019 @平成Ruby会議01
- 2. @sat0yu - Software engineer at - Building microservices with gRPC and GraphQL - Three years of
- 3. What’s takeaway of this session 1. The basic use of Promise and Fiber 2. ★ The combination of Promise and Fiber performs like Async/Await syntax 3. ★★ The naive Async/Await syntax sadly does NOT work efficiently in ★: hard for @sat0yu to explain
- 4. GraphQL as an integrator *Note: just a part of the whole Quipper services
- 5. N+1 problems with GraphQL
- 8. How to use Graphql-batch - Build a loader so as inherit GraphQL::Batch::Loader - which need implementing perform(...)fetching data in bulk - Generate field values through the loader X.rb Y.rb ref. https://github.com/Shopify/graphql-batch
- 9. Nested loaders 🤔 ref. https://github.com/Shopify/graphql-batch
- 10. “Promise” in Graphql-batch💡 ref. https://github.com/Shopify/graphql-batch
- 11. - A representation of an eventual value - The value won’t be calculated until evaluating it (lazy-evaluation) - Chain-able with other promises through .then(...) What is “Promise”? fulfill rejectpending fulfilled rejected ※ .load(...) returns a promise
- 12. Async/Await syntax with Promise and Genarator JavaScript
- 13. Async/Await in JavaScript - Declared in ES2017(ES8); Almost all browsers have compatibility - Convenient to write async processing with a synchronized-ish syntax JavaScript
- 14. Pause and Resume for promises - Declared in ES2017(ES8); Almost all browsers have compatibility - Convenient to write async processing with a synchronized-ish syntax sleeping... Pause Resume JavaScript
- 15. Promise + Generator ≈ Async/Await ≈ JavaScript
- 16. Generator pretends Pause and Resume JavaScript
- 17. Generator pretends Pause and Resume JavaScript How can we use Pause & Resume in Ruby?
- 18. Generator pretends Pause and Resume JavaScript Fiber (1.9~)
- 28. Async/Await syntax with Promise and Genarator Fiber
- 29. 2. Rewrite nested loaders with Fiber 1. Nested loaders implementation 3. Rewrite nested “resume”s
- 30. 1. Nested loaders implementation 2. Rewrite nested loaders with Fiber 3. Rewrite nested “resume”s
- 31. 1. Nested loaders implementation
- 32. 1. Nested loaders implementation
- 33. 1. Nested loaders implementation
- 34. 1. Nested loaders implementation
- 35. 1. Nested loaders implementation 2. Rewrite nested loaders with Fiber 3. Rewrite nested “resume”s
- 36. 2. Rewrite nested loaders with Fiber
- 37. ⏸ 2. Rewrite nested loaders with Fiber
- 38. ⏩ 2. Rewrite nested loaders with Fiber
- 39. ⏩ p1 2. Rewrite nested loaders with Fiber
- 40. ⏸ p1 next p1 2. Rewrite nested loaders with Fiber
- 41. ⏸ p1 next p1 2. Rewrite nested loaders with Fiber
- 42. ⏩ p1 next p1 2. Rewrite nested loaders with Fiber
- 43. ⏩ p1 next p1 p2 2. Rewrite nested loaders with Fiber
- 44. ⏸ p1 next p1 p2 next p2 2. Rewrite nested loaders with Fiber
- 45. ⏸ p1 next p1 p2 next p2 2. Rewrite nested loaders with Fiber
- 46. ⏩ p1 next p1 p2 next p2 2. Rewrite nested loaders with Fiber
- 47. p1 next p1 p2 next p2 X 2. Rewrite nested loaders with Fiber
- 48. p1 next p1 p2 next p2 X 2. Rewrite nested loaders with Fiber
- 49. Looks working 🎉👏 2. Rewrite nested loaders with Fiber
- 50. 1. Nested loaders implementation 2. Rewrite nested loaders with Fiber 3. Rewrite nested “resume”s
- 51. 3. Rewrite nested “resume”s
- 52. 3. Rewrite nested “resume”s
- 53. 3. Rewrite nested “resume”s
- 54. 3. Rewrite nested “resume”s
- 55. 3. Rewrite nested “resume”s
- 56. 3. Rewrite nested “resume”s
- 57. 3. Rewrite nested “resume”s
- 58. Looks working 🎉👏 3. Rewrite nested “resume”s
- 59. Let’s apply the naive Async/Await syntax to xx
- 60. Async/Await in
- 61. When fetching A and B fields
- 62. When fetching C and D fields N+1…🤔
- 63. What’s wrong with the naive Async/Await? The naive Async/Await impl. returns a value, not a promise as a result Graphql-batch allows fields to return a promise in place of a value
- 64. Is it possible to fix it? - It makes me feel it’s do-able… but it does not work even if modifying it as returning a promise - The main difficulty comes from the difference in the promise life-cycle between Graphql-batch and the handcrafted Async/Await implementation
- 65. Summary - Explained the basic usage of Promise and Fiber - Confirmed the combination of Promise and Fiber works as Async/Await syntax - Observed that the naive impl. is not enough to work along with Graphql-batch - Code available: https://github.com/sat0yu/heisei-ruby-kaigi01 Thank you for your time and attention 🙇