Annotation Type 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