Spring Boot中使用Spring Integration的Kafka配置

Question

我有一个工作中的原型 Spring Boot 应用程序，它侦听 Kafka 队列。除了在 application.yml 中的配置外，所有需要的只是使用 @KafkaListener 注释的 MessageListener 实现。

现在，我正在引入 Spring Integration，并已配置这些 bean：

@Bean
public KafkaMessageDrivenChannelAdapter<String, String>
adapter(KafkaMessageListenerContainer<String, String> container) {
    KafkaMessageDrivenChannelAdapter<String, String> kafkaMessageDrivenChannelAdapter =
            new KafkaMessageDrivenChannelAdapter<>(container);
    kafkaMessageDrivenChannelAdapter.setOutputChannel(receiver());
    return kafkaMessageDrivenChannelAdapter;
}

@Bean
public KafkaMessageListenerContainer<String, String> container() throws Exception {
    ContainerProperties properties = new ContainerProperties(this.topic);
    // set more properties
    return new KafkaMessageListenerContainer<>(consumerFactory(), properties);
}

@Bean
public ConsumerFactory<String, String> consumerFactory() {
    Map<String, Object> props = ...; // set proerties
    return new DefaultKafkaConsumerFactory<>(props);
}

应用程序无法启动，并抛出以下错误：

Parameter 1 of method kafkaListenerContainerFactory in org.springframework.boot.autoconfigure.kafka.KafkaAnnotationDrivenConfiguration required a bean of type 'org.springframework.kafka.core.ConsumerFactory' that could not be found.
    - Bean method 'kafkaConsumerFactory' in 'KafkaAutoConfiguration' not loaded because @ConditionalOnMissingBean (types: org.springframework.kafka.core.ConsumerFactory; SearchStrategy: all) found bean 'consumerFactory'


Action:

Consider revisiting the conditions above or defining a bean of type 'org.springframework.kafka.core.ConsumerFactory' in your configuration.

尽管我已定义了一个ConsumerFactory bean，但这仍然存在。

在调试模式下运行，很明显Boot正在加载一个KafkaListenerEndpointContainer bean来监听代理：

[org.springframework.kafka.KafkaListenerEndpointContainer#0-0-C-1] o.a.k.c.c.internals.AbstractCoordinator  : Discovered coordinator localhost:9092 (id: 2147483999 rack: null) for group my_group.

然后：

  KafkaAnnotationDrivenConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.kafka.annotation.EnableKafka'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   KafkaAnnotationDrivenConfiguration#kafkaListenerContainerFactory matched:
      - @ConditionalOnMissingBean (names: kafkaListenerContainerFactory; SearchStrategy: all) did not find any beans (OnBeanCondition)

   KafkaAnnotationDrivenConfiguration#kafkaListenerContainerFactoryConfigurer matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.kafka.ConcurrentKafkaListenerContainerFactoryConfigurer; SearchStrategy: all) did not find any beans (OnBeanCondition)

   KafkaAnnotationDrivenConfiguration.EnableKafkaConfiguration matched:
      - @ConditionalOnMissingBean (names: org.springframework.kafka.config.internalKafkaListenerAnnotationProcessor; SearchStrategy: all) did not find any beans (OnBeanCondition)

   KafkaAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.kafka.core.KafkaTemplate'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   KafkaAutoConfiguration#kafkaProducerFactory matched:
      - @ConditionalOnMissingBean (types: org.springframework.kafka.core.ProducerFactory; SearchStrategy: all) did not find any beans (OnBeanCondition)

   KafkaAutoConfiguration#kafkaProducerListener matched:
      - @ConditionalOnMissingBean (types: org.springframework.kafka.support.ProducerListener; SearchStrategy: all) did not find any beans (OnBeanCondition)

   KafkaAutoConfiguration#kafkaTemplate matched:
      - @ConditionalOnMissingBean (types: org.springframework.kafka.core.KafkaTemplate; SearchStrategy: all) did not find any beans (OnBeanCondition)

我认为发生的情况是Spring Boot\Kafka自动配置与Spring Integration\Kafka设置冲突了。正确解决这个问题的方法是什么？

谢谢

- user1052610

Answer 1

您可以使用Boot的Consumer工厂...

@Bean
public KafkaMessageListenerContainer<String, String> container(ConsumerFactory<String, String> cf) {
    ...
}

或者禁用kafka自动配置

@SpringBootApplication(exclude = KafkaAutoConfiguration.class)

- Gary Russell