Java, How to get number of messages in a topic in apache kafka

Question

I am using apache kafka for messaging. I have implemented the producer and consumer in Java. How can we get the number of messages in a topic?

Answer 1

Use https://prestodb.io/docs/current/connector/kafka-tutorial.html

A super SQL engine, provided by Facebook, that connects on several data sources (Cassandra, Kafka, JMX, Redis ...).

PrestoDB is running as a server with optional workers (there is a standalone mode without extra workers), then you use a small executable JAR (called presto CLI) to make queries.

Once you have configured well the Presto server , you can use traditionnal SQL:

SELECT count(*) FROM TOPIC_NAME;