kafka-streams

library4.2.0javamavenunverified

Kafka Streams is a client library for building stream processing applications on top of Apache Kafka.

<dependency>
  <groupId>org.apache.kafka</groupId>
  <artifactId>kafka-streams</artifactId>
  <version>4.2.0</version>
</dependency>

homepage ↗docs ↗

INSTALL

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SIG · KAFKA-STREAMS

kafka-streams

messagingjavav4.2.0

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Install & Compatibility

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Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

KafkaStreams

✓ org.apache.kafka.streams.KafkaStreams

Starts a Kafka Streams application that reads from an input topic and writes to an output topic.

import org.apache.kafka.streams.KafkaStreams; import org.apache.kafka.streams.StreamsBuilder; import org.apache.kafka.streams.StreamsConfig; import java.util.Properties; public class Example { public static void main(String[] args) { Properties props = new Properties(); props.put(StreamsConfig.APPLICATION_ID_CONFIG, "my-app"); props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092"); StreamsBuilder builder = new StreamsBuilder(); builder.stream("input-topic").to("output-topic"); KafkaStreams streams = new KafkaStreams(builder.build(), props); streams.start(); } }

Debug

Known issues

gotchaKafka Streams requires a running Kafka cluster; ensure bootstrap servers are reachable.

fix

Start a Kafka broker or use a hosted service.

affects: all

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Version history

4.2.0latest on Maven

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Resources

homepagehttps://kafka.apache.org ↗

docshttps://appdoc.app/artifact/org.apache.kafka/kafka-streams/ ↗