JavaSpringKafka与springintegration的并发性
我不知道我是否遗漏了一些明显的东西,或者spring-integration-kafka:3.0.1
中有一个bug,因为它试图让多个消费者为一个主题运行。该场景是一个带有10个分区的Kafka主题,以及一个侦听该主题的springboot应用程序。相关配置为:
应用程序。yml:
spring:
kafka:
consumer:
group-id: test-consumer
auto-offset-reset: earliest
listener:
concurrency: 4
配置:
@Configuration
@EnableIntegration
@IntegrationComponentScan("com.test")
public class MessageConfig {
@Bean
public MessageChannel testReceiveChannel() {
return MessageChannels.direct().get();
}
@Bean
public IntegrationFlow testReceiveFlow(@Qualifier("kafkaConsumerFactory") final ConsumerFactory<?, ?> kafkaConsumer, final MessageChannel testReceiveChannel) {
return IntegrationFlows
.from(Kafka.messageDrivenChannelAdapter(kafkaConsumer, ListenerMode.record, "test-topic"))
.transform(new JsonToObjectTransformer(EventMessage.class))
.channel(testReceiveChannel)
.get();
}
}
听众:
@Component
public class EventListener {
private static final Logger LOG = LoggerFactory.getLogger(EventListener.class);
@ServiceActivator(inputChannel = "testReceiveChannel")
public void processMessage(final EventMessage message) {
LOG.info("Got message {} on {}", message.getValue(), Thread.currentThread().getName());
}
}
开始时,我只得到一个容器在所有10个分区上侦听。我可以看到ConcurrentKafkaListenerContainerFactory
上设置了正确的并发值,但似乎从未调用过它的initializeContainer
方法(如果我理解正确,这将应用于实际的使用者)。然而,我可能是在看一件完全错误的事情
知道我忽略了什么吗
# 1 楼答案
Spring启动
KafkaProperties
(例如spring.kafka.listener.concurrency = 4
)和所提到的ConcurrentKafkaListenerContainerFactory
应用于@KafkaListener
组件。这与Spring集成无关。至少是自动的您需要手动执行此操作: