我正在写一个 Kafka 消费者。我需要将环境变量主题名称传递给@KafkaListener(topics = ...). 这是我迄今为止尝试过的:
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Service;
@Service
public class KafkaConsumer {
@Autowired
private EnvProperties envProperties;
private final String topic = envProperties.getTopic();
@KafkaListener(topics = "#{'${envProperties.getTopic()}'}", groupId = "group_id")
public void consume(String message) {
logger.info("Consuming messages " +envProperties.getTopic());
}
}
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我在线路上遇到错误topics = "#{'${envProperties.getTopic()}'}",应用程序无法启动。
如何从环境变量动态设置此主题名称?