This sample project demonstrates how to use a functionless cache invalidation process when utilizing API Gateway and DynamoDB as a simple CRUD.

By introducing EventBridge to this architecture and enabling DynamoDB Streams, the MODIFY event fired into the stream can be captured, processed, and published to a custom EventBridge Event Bus using EventBridge Pipes.

Once the event is available on the custom EventBridge Event Bus, a rule can consume the event and target the API Gateway with a Cache-Control: max-age=0 header and correct AWS IAM permissions execute-api:InvalidateCache using the ARN method for the target.