一个Spring的KafkaConsumer听众能听多个主题吗?

时间:2017-01-25 20:36:24

标签: spring spring-boot spring-kafka

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);
} 

ContainerProperties containerProps = new ContainerProperties(new TopicPartitionInitialOffset("topic1, topic2", 0));

1 个答案:

答案 0 :(得分:6)

是的,只需按照@KafkaListener JavaDocs:

进行操作
/**
 * 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"})