Serverless and GraphQL

The Incredible Automation Day

Creating a simple GraphQL Endpoint with AWS Lambda, serverless.com, Apollo and DynamoDB

Software

Serverless === Painless ?
Creating a Serverless GraphQL endpoint in 60 minutes or less

Who am I?
Assaf Gannon
Full Stack Developer since 2000
Work @ Tikal
assaf@tikalk.com
https://github.com/assafg/graphql-shopping-cart

What is Serverless?
BL
BL
BL
DB
Auth
PubSub
Queue
Cache
Logs
API
Storage

What is Serverless?
Small pieces of Business Logic deployed independently
Using Services for non-Business Logic stuff:
Persistance (DB / Cache / Static)
Messaging
Authentication / Authorisation
Logging / Monitoring

What are the Pros
Seamless horizontal scaling
Fast and cheap ramp up
Pay as you go
High-end tech widely available

What’s the catch?
Vendor lock-in
Different development paradigms
On-premise solutions can be difﬁcult to set up and
maintain (see ‘Vendor Lock-in’)

Our Project: GraphQL Endpoint for
a Shopping-Cart
Using AWS

GraphQL
Query language for APIs
Typed
Access multiple resources in single query
Query only what you need
Play: https://launchpad.graphql.com/new

DynamoDB
NoSQL DB Service by AWS
Fast, Flexible & Scalable
Document & key-value support

Lambda
AWS Functions Service
Deploy your code as a function
Highly scalable
Multiple languages supported

Auth0
Commercial Authentication service
Easy to integrate
Supports most SSO providers

serverless.com
A toolkit for developing & deploying server less
architecture
Supports: AWS, Google Cloud Platform, Azure,
OpenWhisk

Apollo
A set of frameworks to make GraphQL more accessible
Apollo Server
Apollo Client
Apollo Engine
https://www.apollographql.com

Ingredients
2 Lambda functions
DynamoDB store
Auth0 authentication

Getting started:
1. Install serverless CLI  
(https://serverless.com/framework/docs/getting-started/)
2. Make sure AWS credentials are in place
3. Choose you language (Javascript, Java, Python, Go, C#
are supported)
4. Create a new Service via ‘serverless create`

Now what?!
1. Deploy your empty service
2. Add your functions and resources to serverless.yml
3. Start implementing your functions

2. Add your functions and resources to serverless.yml

“… and yada yada yada, I'm really tired today”
–Marcy, George’s girlfriend

Adding a DB
Let’s make this interesting…

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