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Consuming Messages

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

answer Consuming Messages

Consuming Messages

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For consuming messages, we need to configure a ConsumerFactory and a KafkaListenerContainerFactory. Once these beans are available in the Spring bean factory, POJO-based consumers can be configured using @KafkaListener annotation.

@EnableKafka annotation is required on the configuration class to enable the detection of @KafkaListener annotation on spring-managed beans:

@EnableKafka
@Configuration
public class KafkaConsumerConfig {

    @Bean
    public ConsumerFactory<String, String> consumerFactory() {
        Map<String, Object> props = new HashMap<>();
        props.put(
          ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, 
          bootstrapAddress);
        props.put(
          ConsumerConfig.GROUP_ID_CONFIG, 
          groupId);
        props.put(
          ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, 
          StringDeserializer.class);
        props.put(
          ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, 
          StringDeserializer.class);
        return new DefaultKafkaConsumerFactory<>(props);
    }

    @Bean
    public ConcurrentKafkaListenerContainerFactory<String, String> 
      kafkaListenerContainerFactory() {
   
        ConcurrentKafkaListenerContainerFactory<String, String> factory =
          new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactory());
        return factory;
    }
}

https://www.baeldung.com/spring-kafka

Popularity 1/10 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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