This example shows how to use JVM-based project powered by Spring Cloud Function framework together with LocalStack.

Application setup:

• HTTP routing and warmups
• Pure lambda functions
• Event handling lambda functions [pro]

Application testing:

• Testing with JUnit and LocalStack Java Utils
• Debugging application with remote debugger

Deployment setup:

• Deploying and hot code swapping with Serverless
• Deploying and hot code swapping with CDK
• Deploying and hot code swapping with Terraform

• src/main - project sources directory
• src/test - project tests directory
• deployments/cdk - sample CDK deployment
• deployments/serverless - sample Serverless deployment
• deployments/terraform - sample Terraform deployment

• Docker
• Java JDK 11
• [optional] watchman for code hot-swapping
• [optional] Nodejs for Serverless deployments
• [optional] aws cdk and cdklocal for CDK deployments
• [optional] Terraform for terraform deployments

• make usage - show usage help

• If you are going to use pro-features, rename .env.example to .env and set your LocalStack pro API Key
• Start the LocalStack service docker compose up [-d]
• Deploy the local stack using one of available frameworks make deploy-<framework>-local, for example make deploy-cdk-local
• Optionally start the watchman service for code hot-swapping make watch
• Invoke one of the endpoints, or lambda functions

Inspect the Makefile and configuration files to see implementation details.

• create a new shell target to wait debugger server on port 5050:

while [[ -z $(docker ps | grep :5050) ]]; do sleep 1; done; sleep 1;

• Add a new Remote Debugger target to attach to port 5050 and select the shell target from above as a before launch action
• Run the debugger and invoke your lambda function