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AppSync

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description AppSync Overview

AppSync is a managed GraphQL API service from AWS. It simplifies building and managing APIs by providing a unified interface for accessing data from multiple sources. AppSync excels in data federation and real-time data synchronization. Its ideal for organizations using AWS and needing to build scalable, resilient APIs.

help AppSync FAQ

What does AWS AppSync provide besides ordinary GraphQL queries?

AWS AppSync supports GraphQL queries, mutations, and subscriptions through a managed service. Its subscription system can maintain secure WebSocket connections and push updates to connected clients.

Which AWS data sources can AppSync connect to?

AppSync can connect GraphQL resolvers to services including Amazon DynamoDB, AWS Lambda, and Amazon OpenSearch Service. This lets one API expose data that is stored in more than one backend.

How are real-time updates triggered in AppSync?

Traditional AppSync subscriptions are commonly triggered by GraphQL mutations annotated with the aws_subscribe directive. The client then receives the selected fields through the managed real-time connection.

How does AppSync authentication work?

AWS AppSync supports authentication options including API keys, AWS IAM, Amazon Cognito, OpenID Connect, and Lambda authorization. The appropriate choice depends on whether the API serves public data, signed AWS clients, or user accounts.

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