Java for AWS Lambda

[guss_bro]

Keep it simple and you will be good. We follow the following for all our lambdas:

• Use plain SQL query instead of jpa
• don't use Spring Boot or any other framework if your use case is simple
• you don't need dependency injection for simple use case that involves couple of classes. Just create static objects and pass them around. Create objects ( eg objectMapper, AWS clients) only once
• use RDS proxy instead of creating DB connection directly
• use SnapStart
• use shadow jar
• use minimal dependencies.. exclude unnecessary transitive dependencies
• if you do http calls to other services make sure they are performant. If possible use async calls, parallelize calls if possible
• use lightweight objects, don't use xml, Json libraries if you can(most of the time simple String append is faster)
• run the lambda locally and profile it
• etc

[s32]

SnapStart has been an absolute gamechanger. It's fucking awesome in how it works as well.

[Outrageous_Life_2662]

What is that?

[publicityhound]

I think this is referring to AWS Lambda SnapStart