scala3-aws-lambda-dynamodb-importer

AWS Lambda function written in both Scala3 and Python which handles URL POST requests to insert items into a DynamoDB table.

GitHub Action to automatically push new builds to AWS as part of a CI/CD pipeline.

AWS Lambda with interaction to other AWS services and CI/CD

https://www.stevenskelton.ca/scala-3-aws-lambda-functions/

Features:

• Read JSON from HTTP body
• Batch Put to DynamoDB
• JSON response containing put count
• Descriptive exception for missing body
• Descriptive exception for missing fields
• AWS CloudWatch logging for unhandled exceptions

JVM versus Python

https://www.stevenskelton.ca/jvm-versus-python-aws-lambda-functions/

Python implementation is at /src/main/python/handler.py

	Scala / JVM	Python
Lines of Code	86	61
File size	17.6 MB	1.7 KB
Cold Start
- Init duration	429.39 ms	315.41 ms
- Duration	11077.39 ms	274.72 ms
- Max memory used	152 MB	67 MB
Hot Load
- Duration	21.48 ms	13.97 ms
- Max memory used	153 MB	70 MB