AWS SQS Thumbnail Generator

A serverless application demonstrating how to decouple image processing using AWS SQS. This project showcases AWS infrastructure design and implementation using AWS CDK.

Architecture

The application uses the following AWS services:

• S3 Bucket: Stores original images and generated thumbnails

  • /uploads - Original images
  • /thumbnails - Generated thumbnails in different sizes

• SQS Queue: Decouples image upload from processing

  • Includes Dead Letter Queue (DLQ) for failed messages
  • Maximum of 3 retries before moving to DLQ

• Lambda Function: Processes images and generates thumbnails

  • Runtime: Node.js
  • Uses Sharp library for image processing
  • Generates 3 thumbnail sizes (small: 50px, medium: 150px, large: 300px)

How it Works

1. Upload an image to the S3 bucket's /uploads folder
2. S3 triggers an event notification to SQS
3. Lambda function processes the SQS message
4. Thumbnails are generated and stored in the /thumbnails folder
5. SQS message is deleted upon successful processing

Infrastructure as Code

This project is built using AWS CDK, demonstrating:

• Type-safe infrastructure definition using TypeScript
• Best practices for AWS resource configuration
• Proper IAM permissions and security settings
• Event-driven architecture
• Error handling with Dead Letter Queues

Development

To modify thumbnail sizes or add new features:

Edit the THUMBNAIL_WIDTHS array in thumbnail-generator.ts Update the stack configuration in aws-sqs-thumbnail-generator-stack.ts Deploy changes using cdk deploy