Table of Contents

1. Challenge

   Clone the Producer Source Code and Run it to Ensure that Everything Works

   1. Clone the producer source code into the home directory:

   cd ~/
   git clone https://github.com/linuxacademy/content-ccdak-kafka-client-config-lab.git
   

   1. Run the code to ensure it works before modifying it:

   cd content-ccdak-kafka-client-config-lab
   ./gradlew run
   

   1. To view the output, consume the records from the inventory_purchases topic:

   kafka-console-consumer --bootstrap-server localhost:9092 --topic inventory_purchases --property print.key=true --from-beginning
   

2. Challenge

   Implement the Required Configuration Changes in the Producer and Run the Program to Test Them

   1. Edit the Main class of the producer source code:

   vi src/main/java/com/linuxacademy/ccdak/client/config/Main.java
   

   1. Add the necessary configurations to the props object before the producer is instantiated. The final code should look something like this:

   package com.linuxacademy.ccdak.client.config;
   
   import java.util.Properties;
   import org.apache.kafka.clients.producer.KafkaProducer;
   import org.apache.kafka.clients.producer.Producer;
   import org.apache.kafka.clients.producer.ProducerRecord;
   
   public class Main {
   
       public static void main(String[] args) {
           Properties props = new Properties();
           props.put("bootstrap.servers", "localhost:9092");
           props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
           props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
   
           props.put("acks", "all");
           props.put("buffer.memory", "12582912");
           props.put("connections.max.idle.ms", "300000");
   
           Producer<String, String> producer = new KafkaProducer<>(props);
           producer.send(new ProducerRecord<>("inventory_purchases", "apples", "1"));
           producer.send(new ProducerRecord<>("inventory_purchases", "apples", "3"));
           producer.send(new ProducerRecord<>("inventory_purchases", "oranges", "12"));
           producer.send(new ProducerRecord<>("inventory_purchases", "bananas", "25"));
           producer.send(new ProducerRecord<>("inventory_purchases", "pears", "15"));
           producer.send(new ProducerRecord<>("inventory_purchases", "apples", "6"));
           producer.send(new ProducerRecord<>("inventory_purchases", "pears", "7"));
           producer.send(new ProducerRecord<>("inventory_purchases", "oranges", "1"));
           producer.send(new ProducerRecord<>("inventory_purchases", "grapes", "56"));
           producer.send(new ProducerRecord<>("inventory_purchases", "oranges", "11"));
           producer.close();
       }
   
   }
   

   1. Execute the program:

   ./gradlew run
   

   1. Consume the records from the inventory_purchases topic to verify that we can see the new records created by the producer:

   kafka-console-consumer --bootstrap-server localhost:9092 --topic inventory_purchases --property print.key=true --from-beginning