Package org.springframework.kafka.annotation

Annotation Interface EnableKafkaRetryTopic

@Retention(RUNTIME)
@Target(TYPE)
@Documented
@Import(RetryTopicConfigurationSupport.class)
@EnableKafka
public @interface EnableKafkaRetryTopic

Enables the non-blocking topic-based delayed retries feature. To be used in Configuration classes as follows:

 @EnableKafkaRetryTopic
 @Configuration
 public class AppConfig {
 }

 @Component
 public class MyListener {

     @RetryableTopic(fixedDelayTopicStrategy = FixedDelayStrategy.SINGLE_TOPIC, backoff = @Backoff(4000))
     @KafkaListener(topics =  "myTopic")
           public void listen(String message, @Header(KafkaHeaders.RECEIVED_TOPIC) String receivedTopic) {
               logger.info("Message {} received in topic {} ", message, receivedTopic);
     }

     @DltHandler
     public void dltHandler(Object message, @Header(KafkaHeaders.RECEIVED_TOPIC) String receivedTopic) {
               logger.info("Message {} received in dlt handler at topic {} ", message, receivedTopic);
     }
 

Using this annotation configures the default RetryTopicConfigurationSupport bean. This annotation is meta-annotated with @EnableKafka so it is not necessary to specify both. To configure the feature's components, extend the RetryTopicConfigurationSupport class and override the appropriate methods on a @Configuration class, such as:

 @Configuration
 @EnableKafka
 public class AppConfig extends RetryTopicConfigurationSupport {
                @Override
                protected void configureBlockingRetries(BlockingRetriesConfigurer blockingRetries) {
                        blockingRetries
                                .retryOn(ShouldRetryOnlyBlockingException.class, ShouldRetryViaBothException.class)
                                .backOff(new FixedBackOff(50, 3));
                }

                @Override
                protected void configureNonBlockingRetries(NonBlockingRetriesConfigurer nonBlockingRetries) {
                        nonBlockingRetries
                                .addToFatalExceptions(ShouldSkipBothRetriesException.class);
 }
 

In this case, you should not use this annotation, use @EnableKafka instead.

Since:

2.9

Author:

Tomaz Fernandes