任何人都知道单个监听器是否可以监听下面的多个主题?我知道" topic1"工作,如果我想添加其他主题怎么办?你能否在下面展示两个例子?谢谢你的帮助!
@KafkaListener(topics = "topic1,topic2")
public void listen(ConsumerRecord<?, ?> record, Acknowledgment ack) {
System.out.println(record);
}
或
ContainerProperties containerProps = new ContainerProperties(new TopicPartitionInitialOffset("topic1, topic2", 0));
答案 0 :(得分:6)
是的,只需按照@KafkaListener
JavaDocs:
/**
* The topics for this listener.
* The entries can be 'topic name', 'property-placeholder keys' or 'expressions'.
* Expression must be resolved to the topic name.
* Mutually exclusive with {@link #topicPattern()} and {@link #topicPartitions()}.
* @return the topic names or expressions (SpEL) to listen to.
*/
String[] topics() default {};
/**
* The topic pattern for this listener.
* The entries can be 'topic name', 'property-placeholder keys' or 'expressions'.
* Expression must be resolved to the topic pattern.
* Mutually exclusive with {@link #topics()} and {@link #topicPartitions()}.
* @return the topic pattern or expression (SpEL).
*/
String topicPattern() default "";
/**
* The topicPartitions for this listener.
* Mutually exclusive with {@link #topicPattern()} and {@link #topics()}.
* @return the topic names or expressions (SpEL) to listen to.
*/
TopicPartition[] topicPartitions() default {};
所以,你的用例应该是:
@KafkaListener(topics = {"topic1" , "topic2"})