AWS lambda written in scala using Quarkus

This project uses Quarkus, the Supersonic Subatomic Java Framework.

If you want to learn more about Quarkus, please visit its website: https://quarkus.io/ .

Running the application in dev mode

You can run your application in dev mode that enables live coding using:

./mvnw compile quarkus:dev

NOTE: Quarkus now ships with a Dev UI, which is available in dev mode only at http://localhost:8080/q/dev/.

Packaging and running the application

The application can be packaged using:

./mvnw package

It produces the quarkus-run.jar file in the target/quarkus-app/ directory. Be aware that it’s not an über-jar as the dependencies are copied into the target/quarkus-app/lib/ directory.

If you want to build an über-jar, execute the following command:

./mvnw package -Dquarkus.package.type=uber-jar

The application is now runnable using java -jar target/quarkus-app/quarkus-run.jar.

Creating a native executable

You can create a native executable using:

./mvnw package -Pnative

Or, if you don't have GraalVM installed, you can run the native executable build in a container using:

./mvnw package -Pnative -Dquarkus.native.container-build=true

You can then execute your native executable with: ./target/quarkus-lambda-1.0.0-SNAPSHOT-runner

If you want to learn more about building native executables, please consult https://quarkus.io/guides/maven-tooling.html.

Local invocation

First package the application and then the serverless function can be invoked locally using SAM as shown below. It accepts JSON representing case class as input and outputs a string; which is displayed in the console.

❯ sam local invoke --template target/sam.jvm.yaml --event data/sam-local-input-event-payload.json
Invoking io.quarkus.amazon.lambda.runtime.QuarkusStreamHandler::handleRequest (java11)
Decompressing /Users/viswanath/projects/quarkus-lambda/target/function.zip
Skip pulling image and use local one: amazon/aws-sam-cli-emulation-image-java11:rapid-1.23.0.

Mounting /private/var/folders/sg/fcz8bfpd2jq2x_x4myr7jwgc0000gn/T/tmpl3usogmt as /var/task:ro,delegated inside runtime container
START RequestId: d5281438-3982-4fca-bf04-45d65707c468 Version: $LATEST
__  ____  __  _____   ___  __ ____  ______
 --/ __ \/ / / / _ | / _ \/ //_/ / / / __/
 -/ /_/ / /_/ / __ |/ , _/ ,< / /_/ /\ \
--\___\_\____/_/ |_/_/|_/_/|_|\____/___/
2021-07-02 14:34:20,507 INFO  [io.quarkus] (main) quarkus-lambda 1.0.0-SNAPSHOT on JVM (powered by Quarkus 2.0.0.Final) started in 3.592s. Listening on: http://0.0.0.0:8081
2021-07-02 14:34:20,510 INFO  [io.quarkus] (main) Profile prod activated.
2021-07-02 14:34:20,511 INFO  [io.quarkus] (main) Installed features: [amazon-lambda, cdi, scala, smallrye-context-propagation]
2021-07-02 14:34:20,542 INFO  [io.ori.lam.lam.GreeterLambda] (main) Invoking lambda function using the input: GreetingInput(world)
END RequestId: d5281438-3982-4fca-bf04-45d65707c468
REPORT RequestId: d5281438-3982-4fca-bf04-45d65707c468	Init Duration: 0.21 ms	Duration: 3955.16 ms	Billed Duration: 4000 ms	Memory Size: 512 MB	Max Memory Used: 512 MB
"Hello world!"

Related Guides

AWS Lambda (guide): Write AWS Lambda functions

viswanath7 / quarkus-lambda-scala