In 15 minutes (hence the double-rapid name) we'll see why using GraphQL for mobile apps is a good idea, and we'll see how to quickly host a scalable and secure GraphQL endpoint in the cloud with AWS AppSync.

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Gabe Hollombe, AWS
June 1, 2018
Rapid Rapid mobile API development
with GraphQL and AWS AppSync

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What we want
Flexible Client
Schema
Instant
Access
ScalabilityOffline Data
Minimal
Data Transfer
Security

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How we can get it
Flexible Client
Schema
Instant
Access
ScalabilityNetwork
Connectivity
Minimal
Data Transfer
Security
Use a UI
driven data
protocol like
GraphQL
Use a mobile
client SDK
with an
offline cache
Host your
backend in
the cloud with
serverless
technologies

5. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Keep in touch on Twitter: @gabehollombe© 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
GraphQL

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Example GraphQL Query and Response
{
“data”: {
“GetPost”: {
“id”: 1,
“title”: “Introduction to GraphQL”,
“comments”: [
{ “content”: “Comment #1” },
{ “content”: “Comment #2” }
]
}
}
}

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Your GraphQL Schema
• Schema defines the security perimeter
• Requests and responses are strongly typed
• Self-documenting
• Easy to use code generation tools
• Advanced types available
https://graphql.org/learn

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Serverless Backend

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Serverless in a nutshell
• No servers to manage
• Scale as the service needs
• Pay for what you use
• Focus on your application
Amazon Cognito Amazon Pinpoint
Amazon DynamoDBAWS Lambda
AWS AppSync

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Options for Data Services
• GraphQL Service in Docker Container
• Standard container can be run anywhere
• Must manage container as well as code
• Scaling and security must be carefully configured
• GraphQL as a Service
• Little to no code needed for most use cases
• Scaling and security managed for you

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Introducing AWS AppSync
AWS AppSync is a managed service for
application data using GraphQL with real-time
capabilities and an offline programming model.
Real-time
Collaboration
Offline Programming
Model with Sync
Flexible Database
Options
Fine-grained
Access Control

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Data Sources with AWS AppSync
Amazon DynamoDB
Amazon Elasticsearch Service
AWS Lambda
NoSQL Service with global table replication.
Complex search capabilities including fuzzy matching and geospatial.
Support any data source with custom resolvers.
• Combine different data sources into one API easily.
• Supports relationships between data sources.

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GraphQL in 2 minutes with AWS AppSync

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type Comment {
eventId: ID!
commentId: String!
content: String!
createdAt: String!
}
type CommentConnection {
items: [Comment]
nextToken: String
}
type Event {
id: ID!
name: String
where: String
when: String
description: String
comments(limit: Int, nextToken: String):
CommentConnection
}
type EventConnection {
items: [Event]
nextToken: String
identity: String
}
type Mutation {
createEvent(
name: String!,
when: String!,
where: String!,
description: String!
): Event
deleteEvent(id: ID!): Event
commentOnEvent(eventId: ID!, content: String!,
createdAt: String!): Comment
}
type Query {
getEvent(id: ID!): Event
listEvents(limit: Int, nextToken: String): EventConnection
}
type Subscription {
subscribeToEventComments(eventId: String!): Comment
@aws_subscribe(mutations: ["commentOnEvent"])
}
schema {
query: Query
mutation: Mutation
subscription: Subscription

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Thank you!
GraphQL + AWS AppSync = ❤
Further learning
graphql.org/learn
aws.amazon.com/appsync
@AWSforMobile