heroku-kafka-demo-java

A simple heroku app that demonstrates using Kafka in java. This demo app accepts HTTP POST requests and writes them to a topic, and has a simple page that shows the last 10 messages produced to that topic.

You'll need to provision the app.

Provisioning

Install the kafka cli plugin:

$ heroku plugins:install heroku-kafka

Create a heroku app with Kafka attached:

$ heroku create
$ heroku addons:create heroku-kafka:beta-dev
$ heroku kafka:wait

Create the sample topic, by default the topic will have 32 partitions.

$ heroku kafka:create messages

Set an environment variable referencing the new topic:

$ heroku config:set KAFKA_TOPIC=messages

Deploy to Heroku and open the app:

$ git push heroku master
$ heroku open