If you are using AppSync’s native JavaScript runtime ( APPSYNC_JS ), your resolver points directly to your bundled repository code. javascript
Here is a practical look at how to implement a TypeScript-based repository pattern using AWS AppSync JavaScript resolvers. Step 1: Define the GraphQL Schema appsync repo
The AWS CDK lets you define cloud infrastructure using familiar programming languages like TypeScript or Python. In an AppSync CDK stack, you would define the GraphqlApi construct, add data sources like a DynamoDB table, and attach resolver functions. The aws-appsync-resolver-samples repo contains a whole directory of CDK examples that you can clone and start with immediately. If you are using AppSync’s native JavaScript runtime
: The primary source is Karen's Repo (cydia.akemi.ai). Note that this repository is occasionally offline for maintenance. In an AppSync CDK stack, you would define
: Because your data access is isolated into repository modules, you can write unit tests using standard testing frameworks (like Jest) by mocking the repository class, without needing to run local DynamoDB or AppSync emulators.
: Testing business logic requires mocking complex AWS integration environments.