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Streaming Data Using Kafka Streams to Count Words

Kafka Streams is a library enabling you to perform per-event processing of records. You can use it to process data as soon as it arrives, versus having to wait for a batch to occur. In this hands-on lab, we use Kafka Streams to stream some input data as plain-text and process it in real-time. With this, we can count the number of words from our input stream.

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 1h 0m
Published
Clock icon Jul 17, 2019

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Table of Contents

  1. Challenge

    Create the Input and Output Topic

    Create the input topic named streams-plaintext-input.

    bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic streams-plaintext-input

    Create the output topic named streams-wordcount-output.

    bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic streams-wordcount-output

  2. Challenge

    Open a Kafka Console Producer

    Open a Kafka console producer.

    bin/kafka-console-producer.sh --broker-list localhost:9092 --topic streams-plaintext-input

    Type the three messages from the instructions.

    >kafka streams is great
>kafka processes messages in real time
>kafka helps real information streams

  3. Challenge

    Open a Kafka Console Consumer

    Open a Kafka console consumer using the default message formatter and the three properties given in the instructions.

    bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 
--topic streams-wordcount-output 
--from-beginning 
--formatter kafka.tools.DefaultMessageFormatter 
--property print.key=true 
--property print.value=true 
--property key.deserializer=org.apache.kafka.common.serialization.StringDeserializer 
--property value.deserializer=org.apache.kafka.common.serialization.LongDeserializer

  4. Challenge

    Run the Kafka Streams Application

    Use the kafka-run-class.sh command to run the WordCountDemo application.

    bin/kafka-run-class.sh org.apache.kafka.streams.examples.wordcount.WordCountDemo
A Cloud Guru - Labs - Streaming Data Using Kafka Streams to Count Words
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A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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