Question

我正在尝试使用reactor-kafka库开发一个Spring Boot应用程序，以对从Kafka主题读取的某些消息做出反应。

我有一个配置类，可以构建KafkaReceiver。

@Configuration
public class MyConfiguration {

    @Bean
    public KafkaReceiver<String, String> kafkaReceiver() {
        Map<String, Object> props = new HashMap<>();
        // Options initialisation...
        final ReceiverOptions<String, String> receiverOptions =
                ReceiverOptions.<String, string>create(props)
                               .subscription(Collections.singleton(consumer.getTopic()));
        return KafkaReceiver.create(receiverOptions);
    } 
}

嗯...现在呢？使用不太活跃的spring-kafka库，我可以用@KafkaListener注释一个方法，Spring Boot会为我创建一个监听Kafka主题的线程。

应该将KafkaReceiver放在哪里？在所有示例中，我发现直接使用main方法，但这不是引导方式。

我正在使用Spring Boot 2.1.3和Reactor-Kafka 1.1.0

谢谢。

Answer 1

Since you have that KafkaReceiver bean, now you can do like this:

@Bean
public ApplicationRunner runner(KafkaReceiver<String, String> kafkaReceiver) {
        return args -> {
                kafkaReceiver.receive()
                          ...
                          .sunbscribe();
        };
}

This ApplicationRunner bean is going to be kicked when the ApplicationContext is ready. See its JavaDocs for more info.

集成Spring Boot和Reactor-Kafka的KafkaReceiver

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