code-with-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/.

Development Container Notes

This project includes a development container configuration for use with VS Code Remote Containers or GitHub Codespaces. The container is configured with:

• OpenJDK 21
• Maven
• Quarkus CLI
• kcat (Kafka client)

Note: The container includes a symbolic link from /usr/local/sdkman/candidates/java/current to the actual Java installation directory. This is needed because some tools (like VS Code and GitHub Codespaces) look for JAVA_HOME in the SDKMAN default location.

Running the application in dev mode

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

./mvnw 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.

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

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

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

The application, packaged as an über-jar, is now runnable using java -jar target/*-runner.jar.

Creating a native executable

You can create a native executable using:

./mvnw package -Dnative

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

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

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

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

Related Guides

• REST Jackson (guide): Jackson serialization support for Quarkus REST. This extension is not compatible with the quarkus-resteasy extension, or any of the extensions that depend on it

Provided Code

REST

Easily start your REST Web Services

Related guide section...

Working with kcat

list topics

kcat -b kafka:9092 -L

produce a test message

echo "hello world" | kcat -b kafka:9092 -t messages

consume messages

kcat -b kafka:9092 -t messages -C