The Greeter Example

This is a simple example that runs a simple stateful function that accepts requests from a Kafka ingress, and then responds by sending greeting responses to a Kafka egress. It demonstrates the primitive building blocks of a Stateful Functions applications, such as ingresses, routing messages to functions, handling state in functions, and sending messages to egresses.

Running the example

To run the example:

docker-compose build
docker-compose up

Then, to see the example in actions, send some messages to the topic names, and see what comes out out of the topic greetings:

docker-compose exec kafka-broker kafka-console-producer.sh \
     --broker-list localhost:9092 \
     --topic names

docker-compose exec kafka-broker kafka-console-consumer.sh \
     --bootstrap-server localhost:9092 \
     --isolation-level read_committed \
     --from-beginning \
     --topic greetings