Kafka + Quarkus + Docker : Demonstration

A small university project to discover the Quarkus Framework combined with the Kafka library, the whole compatible with Docker.

Run

You can run the project very simply with either Intellij IDEA, or directly within a terminal.

Intellij IDEA

Simply clone and load the project into the IDE and in the run configurations, choose compose.

Terminal

Alternatively, you can build and run the project manually by using gradle and launching the application with docker-compose.

gradlew build
docker compose up

Configuration

If you wish, you can modify the configuration of the docker-compose.yaml file to fit your needs.

The container application can be easily modified with the following environment variables :

Name	Required	Format	Default	Description
KAFKA_BOOTSTRAP_SERVERS	true	<ip>[:port]	/	The Kafka server address
TOPIC_TEMPERATURE_CELSIUS	false	string of alphanumeric characters, ".", "_" and "-"	temperature-celsius	The name of the Kafka topic for the temperature in Celsius
TOPIC_TEMPERATURE_FAHRENHEIT	false	string of alphanumeric characters, ".", "_" and "-"	temperature-fahrenheit	The name of the Kafka topic for the temperature in Fahrenheit
TEMPERATURE_LOCATION	true	<latitude>, <longitude>	49.9, 2.3 (Amiens, France)	The coordinates where to get the temperatures from

Expectation

The application container shall print the current temperature at the selected place in Fahrenheit every minute.
You can also access this value with the REST api at the http://localhost:8080/temperature endpoint.

References

The project use the Open-Meteo API to fetch the current temperature at the given location.