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AWS AppSync

  • AppSync is a managed service which uses GraphQL

  • It is used for building APIs on AWS which use GraphQL

  • GraphQL makes it easy for applications to get the exact data they need. This includes combining data from multiple resources

  • Datasets behind GraphQL can include:

    • NoSQL data stores
    • RDS databases
    • HTTP APIs
    • etc.

  • AppSync integrates with (resolvers) DynamoDB, Aurora, ElasticSearch, etc.

  • Supports customer resources using Lambda

  • Provides support for real time data retrieval using WebSocket or MQTT on WebSocket protocols

  • Mobile applications: replacement for Cognito Sync

  • Requires a GraphQL schema for getting started

  • Example for GraphQL schema:

    type Query {
    human(id: ID!): Human
}

type Human {
    name: String
    appearsIn: [Episode]
    starships: [Starship]
}

enum Episode {
    NEWHOPE
    EMPIRE
    JEDI
}

type Starship {
    name: String
}

Security

  • Four ways we can authorize applications to interact with AppSync:
    • API_KEY
    • AWS_IAM
    • OPENID_CONNECT (OpenID Connect provider/ JWT)
    • AMAZON_COGNITO_USER_POOLS
  • For custom domain & HTTPS, use CloudFront in front of AppSync