This project demonstrates an event-driven architecture on AWS using AWS CDK. It triggers an AWS Lambda function in response to an S3 PutObject event, which then sends an email notification through Amazon SNS.

Architecture Overview

• S3 Bucket: Stores files, triggers Lambda on PutObject event.
• Lambda: Executes logic upon file upload and sends an email.
• SNS: Sends an email notification to subscribed email addresses.

The CDK stack itself is written in Java(17) but the lambda function is written in Javascript(Node 20 Runtime).

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Just head over to the lambda directory, run npm install - and then you can edit unique parameters in the stack(like emails) to your liking.

Then, from the root of the project, run:

cdk deploy

This command will deploy the CloudFormation stack with all the resources defined in the CDK application, including:

• An S3 bucket
• A Lambda function
• An SNS topic and subscription (email)

If you no longer need the resources, you can clean up by destroying the stack:

cdk destroy