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Reading from Kafka

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Pragya Keshap answered on February 11, 2023 Popularity 3/10 Helpfulness 1/10

answer Reading from Kafka

Reading from Kafka

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Reads each message from a Kafka topic called input-messages

Validates each message, sending any invalid event to a specific Kafka topic called invalid-messages

Writes the correct messages in a Kafka topic called valid-messages

class Reader implements Consumer {
  private final KafkaConsumer<String, String> consumer;//1
  private final String topic;
  Reader(String servers, String groupId, String topic) {
    this.consumer =
        new KafkaConsumer<>(Consumer.createConfig(servers, groupId));
    this.topic = topic;
  }
  void run(Producer producer) {
    this.consumer.subscribe(Collections.singletonList(this.topic));//2
    while (true) {//3
      ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));  //4
      for (ConsumerRecord<String, String> record : records) {
producer.process(record.value());//5
      }
    }
  }
}

https://learning.oreilly.com/library/view/kafka-the-definitive/9781491936153/ch04.html

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 11 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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