Multiplication Function

This is a small, lightweight service built on top of Quarkus to perform multiplication operations.

Running the application in dev mode

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

mvn compile quarkus:dev

Packaging and running the application

The application can be packaged using:

mvn package

It produces the quarkus-app/quarkus-run.jar file in the /target 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:

mvn package -Dquarkus.package.jar.type=uber-jar

The application is now runnable using java -jar target/multiplication-service-{version}-runner.jar.

Creating a native executable

You can create a native executable using:

mvn package -Pnative

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

mvn package -Pnative -Dquarkus.native.container-build=true

You can then execute your native executable with: ./target/multiplication-service-{version}-runner

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

Testing the Application

Simply run the application with:

$ mvn clean quarkus:dev -Dquarkus.http.port=8282

In a new terminal, execute a curl command to the root path:

$ curl -X POST \
  -H 'Content-Type:application/json'\
  -H 'Accept:application/json' \
  -d '{"leftElement" : "5", "rightElement": "2" }' \
  http://localhost:8282/

And expect a reply like this:

{"multiplication":{"leftElement":5.0,"rightElement":2.0,"product":10.0}}