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Powertools for AWS Lambda (Java) - Core Utilities Example with SAM on GraalVM

This project demonstrates the Lambda for Powertools Java module deployed using Serverless Application Model running as a GraalVM native image.

For general information on the deployed example itself, you can refer to the parent README

Configuration

  • SAM uses template.yaml to define the application's AWS resources. This file defines the Lambda function to be deployed as well as API Gateway for it.

  • Set the environment to use GraalVM

export JAVA_HOME=<path to GraalVM>

Build the sample application

  • Build the Docker image that will be used as the environment for SAM build:
docker build --platform linux/amd64 . -t powertools-examples-core-sam-graalvm
  • Build the SAM project using the docker image
sam build --use-container --build-image powertools-examples-core-sam-graalvm

[Optional] Building with -SNAPSHOT versions of PowerTools

  • If you are testing the example with a -SNAPSHOT version of PowerTools, the maven build inside the docker image will fail. This is because the -SNAPSHOT version of the PowerTools library that you are working on is still not available in maven central/snapshot repository. To get around this, follow these steps:
    • Create the native image using the docker command below on your development machine. The native image is created in the target directory.
      • docker run --platform linux/amd64 -it -v `pwd`:`pwd` -w `pwd` -v ~/.m2:/root/.m2 powertools-examples-core-sam-graalvm mvn clean -Pnative-image package -DskipTests
    • Edit the Makefile remove this line
      • mvn clean package -P native-image
    • Build the SAM project using the docker image
      • sam build --use-container --build-image powertools-examples-core-sam-graalvm

Deploy the sample application

  • SAM deploy
sam deploy

To deploy the example, check out the instructions for getting started with SAM in the examples directory

Additional notes

You can watch the trace information or log information using the SAM CLI:

# Tail the logs
sam logs --tail $MY_STACK

# Tail the traces
sam traces --tail