JNation: REST APIs to GraphQL with Express and Apollo

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Your frontend developers are pushing to get started with GraphQL, but you don’t have the backend capacity to migrate your existing REST APIs to GraphQL? Or you want to have a GraphQL API next to your existing endpoints that are based on REST? In this talk I’ll show how to create a Node.js/Express server that wraps existing REST APIs into one single GraphQL endpoint. Code examples: - https://codesandbox.io/s/mfu9e - https://codesandbox.io/s/graphqlrestexpressapolloserver-uydq6

Technology

From REST to GraphQL:
Wrapping Existing APIs in a
Single Endpoint
JNation Coimbra
04/06/2019
@gethackteam

REST has multiple
endpoints that return ﬁxed
data structures
@gethackteam

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Let’s look at this
REST API
@gethackteam

Documentation is usually
outdated, so you end up…
@gethackteam

Why transfer
to GraphQL?
Single endpoint
@gethackteam

Why transfer
to GraphQL?
Single endpoint
Documentation
@gethackteam

Why transfer
to GraphQL?
Single endpoint
Documentation
Developer friendly
@gethackteam

GraphQL has a single
endpoint that returns ﬂexible
data structures
@gethackteam

Remember the database
example?
@gethackteam

The REST API is now the
data source
@gethackteam

REST API
@gethackteam
Data structure = endpoints
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GraphQL uses types to query
data structures
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Type System
GraphQL
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REST API
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Type System
PRODUCTSPRODUCTS
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GraphQL

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Type System
PRODUCTSPRODUCTS
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GraphQL

Resolvers connect your
schema to the data source
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REST API
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Resolvers
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GraphQL

So you’re able to query
the schema
@gethackteam

Mutation
POST PUT
PATCH DELETE
GET
Query
@gethackteam
Single endpoint

And receive just the data
you’ve asked for
@gethackteam

Sounds great! How to
implement this?
@gethackteam

Implementation
Existing services
Database(s)
Third-party API
@gethackteam

Implementation
Example with Express
@gethackteam

What if I want more advanced
features?
@gethackteam

Implementation
@gethackteam
Model for API
requests

Implementation
@gethackteam
Model for API
requests
Cached by
default!!

Or add a custom caching client
@gethackteam

Implementation
@gethackteam
Memcached /
Redis client

Implementation
@gethackteam
Memcached /
Redis client
Uses Key
Value

Implementation
@gethackteam
Get data from
request headers

Implementation
@gethackteam
So you can pass them forward to the REST API

Implementation
Example with Apollo
@gethackteam

GraphQL gives you ﬂexibility
and has a lot of great tooling
@gethackteam

And can be built on top of your
existing data and code
@gethackteam

Want to learn more?
https://howtographql.com
#GraphQL #JNation
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Powerful Google developer tools for immediate impact! (2023-24 C)

wesley chun

With more memory available, system performance of three Dell devices increased, which can translate to a better user experience Conclusion When your system has plenty of RAM to meet your needs, you can efficiently access the applications and data you need to finish projects and to-do lists without sacrificing time and focus. Our test results show that with more memory available, three Dell PCs delivered better performance and took less time to complete the Procyon Office Productivity benchmark. These advantages translate to users being able to complete workflows more quickly and multitask more easily. Whether you need the mobility of the Latitude 5440, the creative capabilities of the Precision 3470, or the high performance of the OptiPlex Tower Plus 7010, configuring your system with more RAM can help keep processes running smoothly, enabling you to do more without compromising performance.

Boost PC performance: How more available memory can improve productivity

Principled Technologies

Created by Mozilla Research in 2012 and now part of Linux Foundation Europe, the Servo project is an experimental rendering engine written in Rust. It combines memory safety and concurrency to create an independent, modular, and embeddable rendering engine that adheres to web standards. Stewardship of Servo moved from Mozilla Research to the Linux Foundation in 2020, where its mission remains unchanged. After some slow years, in 2023 there has been renewed activity on the project, with a roadmap now focused on improving the engine’s CSS 2 conformance, exploring Android support, and making Servo a practical embeddable rendering engine. In this presentation, Rakhi Sharma reviews the status of the project, our recent developments in 2023, our collaboration with Tauri to make Servo an easy-to-use embeddable rendering engine, and our plans for the future to make Servo an alternative web rendering engine for the embedded devices industry. (c) Embedded Open Source Summit 2024 April 16-18, 2024 Seattle, Washington (US) https://events.linuxfoundation.org/embedded-open-source-summit/ https://ossna2024.sched.com/event/1aBNF/a-year-of-servo-reboot-where-are-we-now-rakhi-sharma-igalia

A Year of the Servo Reboot: Where Are We Now?

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JNation: REST APIs to GraphQL with Express and Apollo

1. From REST to GraphQL: Wrapping Existing APIs in a Single Endpoint JNation Coimbra 04/06/2019 @gethackteam

2. What is this about? @gethackteam

3. @gethackteam

4. Who Am I? @gethackteam

5. Roy Derks @gethackteam

6. Why move away from REST @gethackteam

7. REST has multiple endpoints that return ﬁxed data structures @gethackteam

8. PRODUCTS REVIEWS PRODUCTS REVIEWS @gethackteam REST PRODUCTSUSERS PRODUCTS CART PRODUCTS Database USERS ORDERS CART USERS BILLING PRODUCTS CATEGORIES PRODUCTS OFFERS

9. @gethackteam REST PRODUCTS PRODUCTS REVIEWS PRODUCTS OFFERS REST APIDatabase PRODUCTS PRODUCTS REVIEWS PRODUCTS OFFERS

10. @gethackteam REST PRODUCTS PRODUCTS REVIEWS PRODUCTS OFFERS 1 REST APIDatabase PRODUCTS PRODUCTS REVIEWS PRODUCTS OFFERS

11. @gethackteam REST PRODUCTS PRODUCTS REVIEWS PRODUCTS OFFERS 1 2 REST APIDatabase PRODUCTS PRODUCTS REVIEWS PRODUCTS OFFERS

12. @gethackteam REST PRODUCTS PRODUCTS REVIEWS PRODUCTS OFFERS 1 3 2 REST APIDatabase PRODUCTS PRODUCTS REVIEWS PRODUCTS OFFERS

13. @gethackteam REST

14. @gethackteam REST

15. @gethackteam REST 🤔

16. Let’s look at this REST API @gethackteam

17. @gethackteam REST

18. @gethackteam REST

19. How to inspect this API? @gethackteam

20. @gethackteam

21. Documentation is usually outdated, so you end up… @gethackteam

22. @gethackteam@gethackteam

23. Why transfer to GraphQL? @gethackteam

24. Why transfer to GraphQL? Single endpoint @gethackteam

25. Why transfer to GraphQL? Single endpoint Documentation @gethackteam

26. Why transfer to GraphQL? Single endpoint Documentation Developer friendly @gethackteam

27. GraphQL has a single endpoint that returns ﬂexible data structures @gethackteam

28. Remember the database example? @gethackteam

29. The REST API is now the data source @gethackteam

30. REST API @gethackteam Data structure = endpoints PRODUCTSUSERS PRODUCTS CART PRODUCTSUSERS ORDERS PRODUCTS THUMBNAILS PRODUCTS REVIEWS CART USERS BILLING PRODUCTS CATEGORIES PRODUCTS OFFERS

31. GraphQL uses types to query data structures @gethackteam

32. @gethackteam Type System GraphQL PRODUCTSUSERS PRODUCTS CART PRODUCTSUSERS ORDERS PRODUCTS THUMBNAILS PRODUCTS REVIEWS CART USERS BILLING PRODUCTS CATEGORIES PRODUCTS OFFERS

33. REST API @gethackteam Type System PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL

34. REST API @gethackteam Type System PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL

35. @gethackteam Type System PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL

36. @gethackteam Type System PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL

37. @gethackteam Type System PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL

38. @gethackteam Type System PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL

39. Resolvers connect your schema to the data source @gethackteam

40. REST API @gethackteam Resolvers PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL

41. REST API @gethackteam Resolvers PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL

42. REST API @gethackteam Resolvers PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS PRODUCTSPRODUCTS PRODUCTS THUMBNAILS PRODUCTS REVIEWS PRODUCTS CATEGORIES PRODUCTS OFFERS GraphQL fetch(‘./products’)