我希望能够通过属性读取主题,而无需在 Kafka 监听器注释上指定任何内容。不使用 Spring Boot。
我尝试通过“topics”键直接从属性对象读取主题。这会产生错误: IllegalStateException:必须提供 topics、topicPattern 或 topicPartitions。
// some class
@KafkaListener
public void listener(List<String> messages) {
System.out.print(messages);
}
//some other class
@Bean
public ConsumerFactory<String, String> consumerFactory(Properties topicProp) {
return new DefaultKafkaConsumerFactory(topicProp);
}
@Bean
public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
Properties prop = new Properties();
prop.setProperty("topics", "my-custom-topic");
factory.setConsumerFactory(this.consumerFactory(prop));
return factory;
}
Is this possible?
最佳答案
您可以在主题
中引用其他bean(或bean上的方法)
@Bean
public String topicName() {
return "my-custom-topic";
}
...
@KafkaListener(topics = "#{@topicName}")
...
或
@KafkaListener(topics = "#{@someBean.someMethod()}")
关于java - 如何使用工厂为特定主题配置 Spring Kafka Listener?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57064593/