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Serverless Java Functions via Quarkus for Apache OpenWhisk
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Serverless Java Functions via Quarkus for Apache OpenWhisk

This project contains a simple sample how to use Quarkus to build functions for the serverless platform Apache OpenWhisk.

Download project

$ git clone
$ cd openwhisk-quarkus-starter

Install prerequisites

Before the actual Docker image is built, the native binary is created. Follow the instructions on the Quarkus web site how to set up GraalVM, a Java JDK and Maven.

Build the image

Replace 'nheidloff' with your Docker name.

$ mvn package -Pnative -Dnative-image.docker-build=true
$ docker build -t nheidloff/quarkus-serverless:1 .
$ docker push nheidloff/quarkus-serverless:1

Invoke the function locally

$ docker run -i --rm -p 8080:8080 nheidloff/quarkus-serverless
$ curl --request POST \
  --url http://localhost:8080/run \
  --header 'Content-Type: application/json' \
  --data '{"value":{"name":"Niklas"}}'

Develop the function locally

In order to change the implementation of the sample function, use your favorite Java IDE or text editor. When you run the following command, the application will be updated automatically every time you save a file:

$ mvn compile quarkus:dev

Get an IBM Cloud account

In order to run the function on IBM Cloud Functions, you need a free IBM Cloud lite account and the ‘ibmcloud‘ CLI.

Create the OpenWhisk function

$ ibmcloud login
$ ibmcloud fn action create echo-quarkus --docker nheidloff/quarkus-serverless:1 -m 128

Invoke the OpenWhisk function

$ ibmcloud fn action invoke --blocking echo-quarkus --param name Niklas
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