Simple sample Kafka consumer that reads image data from Kafka and show them on the screen. This application together with kafka-picture-producer builds a demo to explain the differences between Queuing and Publish/Subscribe modes of Kafka Messaging System in a more entertaining way 😏
You'll need a running Apaches Kafka. You may find some information on creating the test setup in the kafka-picture-producer README..
In the easiest way you simply de.opitz.sample.kafka.consumer.Application
java -Djava.awt.headless=false -jar kafka-picture-consumer-2.0.0.jar --kafka.group.id=1
(make sure you went to target folder before the execution)
but there are also some command line arguments
java -Djava.awt.headless=false -jar kafka-picture-consumer-2.0.0.jar [--kafka.topic] [--kafka.group.id]
| argument name | argument value | default |
|---|---|---|
| --kafka.topic | topic the images are published to | images |
| --kafka.group.id | consumer group id | |
| --kafka.bootstrap.servers | url where the Kafka broker(s) can be reached | localhost:9092 |
| --ui.position.left | horizontal starting position of the window | 0 |
| --ui.position.top | vertical starting position of the window | 0 |
These command lines could also be set in the application.yml
This project uses Spring Boot as application framework and Maven to build. The application was written against Kafka 3.2.
This project uses Maven for building the application. Simply run
./mvnw clean install
to build the executable jar file. You then will find it under target.