How to load Kafka Consumer lazily in Spring boot? - spring

Question

I want to provide group Id through command line argument but when I tried this I got following error.
Failed to start bean 'org.springframework.kafka.config.internalKafkaListenerEndpointRegistry'; nested exception is java.lang.IllegalStateException: No group.id found in consumer config, container properties, or #KafkaListener annotation; a group.id is required when group management is used.
That means while loading kafkalistener it required group_id. If I gave groupId in consumerConfig file then Its working properly.
So is there any way so that I can give group Id through command line and kafka listener loads lazily So that I will not require while program starting.
My ConsumerConfig :
#Configuration
class KafkaConsumerConfig {
#Value("${kafka.bootstrap-servers}")
private String bootstrapServers;
#Autowired
private ArgumentModel argumentModel;
private Logger logger = LoggerFactory.getLogger(KafkaConsumerConfig.class);
#Bean
public Map<String, Object> consumerConfigs() {
Map<String, Object> props = new HashMap<>();
logger.info("bootstrapServers : {}", bootstrapServers);
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
props.put(ConsumerConfig.GROUP_ID_CONFIG, argumentModel.getKafkaGroupId());
return props;
}
#Bean
public ConsumerFactory<String, String> consumerFactory() {
return new DefaultKafkaConsumerFactory<>(consumerConfigs());
}
#Bean
public KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<String, String>> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory());
return factory;
}
}

Answer 1

#KafkaListener(... groupId = "${group.id}")
Then pass -Dgroup.id=myGroup on the command line.