This is the presentation that I gave at Serverless Days Milano 2019. Its a 10-minute presentation with lots of videos. If you want to learn more about AppSync check my playlist on how to get started with this. https://www.youtube.com/playlist?list=PLGyRwGktEFqdX2cjO5xQVKb96q2DpwASR

1. Serverless 💚 GraphQL
Marcia Villalba
@mavi888uy
A Match make in heaven

2. What is graphql?
Let’s talk about the most important concepts

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GraphQL is a specification
Not a framework
Not a database
Not a server

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noSQL DB
HTTP service
SQL DB
Client GraphQL

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noSQL DB
HTTP service
SQL DB
Client GraphQL
Schema

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noSQL DB
HTTP service
SQL DB
Client GraphQL
Schema
Resolver

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Graphql
Describe what you can
do using a type system

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Graphql
Ask for what you need
an get exactly that

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Graphql
Get many resources in
one request

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Serverless promise
No managing infrastructure
Pay for what you use
Automagical scale

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Graphql & serverless
Implement your own GraphQL server
Use an existing GraphQL server library
Use an existing GraphQL platform

12. AWS AppSync
A Serverless GraphQL platform

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appSync
•Provides authentication
•Visual tool for queries
•Different datasources - AWS Lambda, Elastic
Search, RDS, HTTP
•Real time and off-line support

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AWS Cloud
Client AWS
AppSync
AWS Lambda
Amazon
DynamoDB
VLT mappers
for request
and response
VLT mappers
for request
and response

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Infrastructure as code
•Serverless Framework
•Serverless Framework plugin for AppSync (https://
github.com/sid88in/serverless-appsync-plugin)

19. Lets go to the code…

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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

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Configure the client

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Run a query

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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

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Thanks!
You can ask questions
Marcia Villalba
@mavi888uy