AWS Lambda grayscale image converter

What is this?

This is a simple demo of running Java on AWS Lambda. This function converts JPG images to grayscale.

How it works?

• Local Java application, with AWS Lambda support (no extra frameworks, only one handler) is built locally into a .zip file
• Terraform creates Lambda function using a .zip file and a custom IAM role
• Local Python script runs the Lambda function with an input file, producing an output file, converting between .jpg and Lambda event expected format for convenience

How to run it?

Run ./gradlew buildZip && terraform apply, then ./invoke.py (boto3 required). Result can be seen in output.jpg file. After playing with it, run terraform destroy to clean up.