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AWS Stockholm Summit 19- Building serverless applications with GraphQL
- 1. S U M M I T STOCKHOLM
- 2. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Building ServerlessApplications with GraphQL Marcia Villalba Full stack developer - Rovio @mavi888uy
- 3. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T About Marcia @mavi888uy bit.ly/foobar-youtube My courses Find me online marcia.dev
- 4. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. Have you seen something like this before?
- 5. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T POST v1/order POST v2/order GET /order/{orderId} GET /orderDescription/{orderId} GET /orderItems/{orderId} GET /order/{orderId} GET /provider/{orderId} GET /customer/{customerId} Bad documentation
- 6. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T 🤯 As a consumer of those APIs As a maintainer of those APIs
- 7. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T 💜 💚 💚 💚 💜 💜
- 8. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. What is GraphQL? Let’s talk about the most important concepts
- 9. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL is a specification Not a framework Not a database Not a server
- 10. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL Ask for what you need an get exactly that
- 11. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL Get many resources in one request
- 12. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL Evolve your API without versions
- 13. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL Describe what you can do using a type system
- 14. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL Connect to multiple datasources Heroes database Planets HTTP service Species noSQL database
- 15. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Query language Runtime
- 16. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. GraphQL Query Language
- 17. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL language Everything is a type Fields can be scalar or other types
- 18. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL language There are special types
- 19. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL language Entry point to the GraphQL query
- 20. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL language The client can write a query like this And get exactly what it needs
- 21. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL language Very complete language Read more about it here: https://graphql.org/learn/
- 22. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. GraphQL Runtime
- 23. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T How graphQL works? 1. Describe your data
- 24. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T How graphQL works? 2. Connect all the types and fields to different datasources Videos table Channels table
- 25. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T How graphQL works? 3. Client ask for what it needs
- 26. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T How graphQL works? 4. The server fetches the information from the different datasources Videos table Channels table
- 27. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T How graphQL works? 5. Returns the data
- 28. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T What are datasources? Can be anything! A Database Another service with an API A HTTP request that return data A call to a search service …
- 29. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Resolvers Provide the instructions from turning GraphQL operations into data SQL database HTTP service noSQL database
- 30. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Resolvers SQL database 1. Translate GraphQL request SELECT video_id, video_name FROM videos 2. Translate datasource response back video_id | video_name 1. | Star Wars Client GraphQL request GraphQL response
- 31. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Why to use GraphQL? • Strong types in the request and responses • No more overfetching and underfetching • Enables rapid product development • API evolution • Transport layer agnostic
- 32. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. Serverless A brief introduction
- 33. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T No managing infrastructure Pay for what you use Automagical scale
- 34. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Backend as a service (BaaS) Function as a service (FaaS) Serverless
- 35. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T https://read.acloud.guru/the-serverless-spectrum-147b02cb2292
- 36. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Benefits of serverless • Pay for what you use • Not reinventing the wheel • Fast development • Not worrying about infra • All about providing value
- 37. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. “The line of code you don’t write is the line of code you never have to debug” Steve Jobs
- 38. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. Serverless and GraphQL
- 39. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T GraphQL & Serverless Implement your own GraphQL server Use an existing GraphQL server library Use an existing GraphQL platform
- 40. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Existing GraphQL platforms • Apollo Platform (https://www.apollographql.com/platform/) • GraphCMS (https://graphcms.com/) • GraphCool (https://www.graph.cool/) • AppSync (https://aws.amazon.com/appsync/)
- 41. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS AppSync
- 42. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Managed GraphQL Platform by AWS
- 43. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T AppSync • Provides authentication • Visual tool for queries • Automatic connection with DynamoDB tables • Different datasources - AWS Lambda, Elastic Search, Aurora DB, HTTP • Real time and off-line support
- 44. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Creates a schema
- 45. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Connect to different datasourcesCreates a schema
- 46. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Connect to different datasourcesCreates a schema Updates data in real time in different devices
- 47. Marcia VillalbaServerless Architecture Conference
- 48. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T How the client uses this? • AWS Amplify • Client library for building cloud apps • More info: https://aws-amplify.github.io/docs/js/api#aws-appsync-sdk
- 49. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Configure the client
- 50. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Run a query
- 51. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Things to have in mind • If you do a DynamoDB scan be careful of performance • Calling a cold AWS Lambda • Doing an HTTP call ads latency to the response • Think about when calling other services from AWS Lambda how much latency you are adding to the whole system
- 52. © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T Conclusion • Fast development • Easily maintainable • Secure applications • Scalable applications • Pay as much as we use
- 53. Thank you! S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. Marcia Villalba @mavi888uy
- 54. S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved. Please complete the session survey. !