justinhj / alpakka1

Playing around with Alpakka

Running Kafka

I grabbed a Docker compose setup from confluent as follows

git clone https://github.com/confluentinc/cp-all-in-one
cd cp-all-in-one
git checkout 5.5.1-post
cd cp-all-in-one-community
docker-compose up -d

Running my samples

The descriptively named Alpakka1 consumes a topic and commits as it goes, doing some phony business logic

Alpakka2, which comes from the same school of amazing naming, produces sample data.

What's going on with my consumer group?

Download the binary for Kafka (probably doesn't matter which Scala version)

https://www.apache.org/dyn/closer.cgi?path=/kafka/2.5.1/kafka_2.12-2.5.1.tgz Extract it then directly run...

./bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --group group2 --describe

Then you can get the details as follows:

GROUP           TOPIC           PARTITION  CURRENT-OFFSET  LOG-END-OFFSET  LAG             CONSUMER-ID     HOST            CLIENT-ID
group2          topic1          0          30000           30000           0