AppSync¶

Overview¶

• Managed service using GraphQL.
• GraphQL makes it easy to perform data queries.
• Can combine data from multiple sources: NoSQL, RDS, HTTP APIs.
• Integrates with DynamoDB, Aurora, Elasticsearch, Lambda etc.
• Retrieve real-time data with WebSockets or MQTT on WebSocket (AppSync, Application Load Balancer, API Gateway).
• Local data access and data sync for mobile apps (offline sync).
• Uses resolvers to communicate with data sources.
• Integrated with CloudWatch metrics & logs.
• Use CloudFront in front of AppSync to support HTTPS or use a custom domain.

GraphQL¶

• GraphQL schema defines the data structure (objects).
• Response is in JSON.

Security¶

There's four ways to authorize applications:

• API_KEY
• AWS_IAM: IAM users/roles/cross-account access.
• OPENID_CONNECT: OpenID Connect provider/JSON web token.
• AMAZONG_COGNITO_USER_POOLS.