Spring Boot: how to use FilteringMessageListenerAdapter - spring-boot

Question

I have a Spring Boot application which listens to messages on a Kafka queue. To filter those messages, have the following two classs
#Component
public class Listener implements MessageListener {
private final CountDownLatch latch1 = new CountDownLatch(1);
#Override
#KafkaListener(topics = "${spring.kafka.topic.boot}")
public void onMessage(Object o) {
System.out.println("LISTENER received payload *****");
this.latch1.countDown();
}
}
#Configuration
#EnableKafka
public class KafkaConfig {
#Autowired
private Listener listener;
#Bean
public FilteringMessageListenerAdapter filteringReceiver() {
return new FilteringMessageListenerAdapter(listener, recordFilterStrategy() );
}
public RecordFilterStrategy recordFilterStrategy() {
return new RecordFilterStrategy() {
#Override
public boolean filter(ConsumerRecord consumerRecord) {
System.out.println("IN FILTER");
return false;
}
};
}
}
While messages are being processed by the Listener class, the RecordFilterStrategy implementation is not being invoked. What is the correct way to use FilteringMessageListenerAdapter?
Thanks

Answer 1

The solution was as follows:
No need for the FilteringMessageListenerAdapter class.
Rather, create a ConcurrentKafkaListenerContainerFactory, rather than relying on what Spring Boot provides out of the box. Then, set the RecordFilterStrategy implementation on this class.
#Bean
ConcurrentKafkaListenerContainerFactory<Integer, String>
kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<Integer, String> factory =
new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory());
factory.setRecordFilterStrategy(recordFilterStrategy());
return factory;
}