在Spring Boot上进行Spring Integration的Kafka配置

Question

我有一个正在工作的原型Spring Boot应用程序，它在Kafka队列上进行监听。除了中的配置外application.yml，所需要的只是一个用MessageListener注释的实现@KafkaListener。

现在正在引入Spring Integration，并为此配置了以下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);
}

应用程序未启动，并引发此错误：

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.

即使我已经定义了一个ConsumerFactorybean。

在调试模式下运行，很明显，Boot正在加载KafkaListenerEndpointContainerbean以侦听代理：

[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)

我认为发生的事情是Spring Boot \ Kafa自动配置与Spring Integration \ Kafka设置冲突。解决此问题的正确方法是什么？

谢谢

Answer 1

您可以使用Boot's Consumer工厂...

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

或禁用kafka自动配置

@SpringBootApplication(exclude = KafkaAutoConfiguration.class)