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S U M M I T
STOCKHOLM
© 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
© 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
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Have you seen something like this before?
© 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
© 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
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
💜
💚
💚
💚
💜
💜
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
© 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
© 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
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
GraphQL
Get many resources in one request
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
GraphQL
Evolve your API without versions
© 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
© 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
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
Query language
Runtime
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
GraphQL
Query Language
© 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
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
GraphQL language
There are special types
© 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
© 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
© 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/
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
GraphQL
Runtime
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
How graphQL works?
1. Describe your data
© 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
© 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
© 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
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
How graphQL works?
5. Returns the data
© 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
…
© 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
© 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
© 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
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Serverless
A brief introduction
© 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
© 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
© 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
© 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
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
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Serverless and GraphQL
© 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
© 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/)
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
AWS AppSync
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
Managed GraphQL
Platform by AWS
© 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
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
Creates a schema
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
Connect to different datasourcesCreates a schema
© 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
Marcia VillalbaServerless Architecture Conference
© 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
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
Configure the client
© 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.S U M M I T
Run a query
© 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
© 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
Thank you!
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Marcia Villalba
@mavi888uy
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
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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
  • 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. !