[英]Consume multiple topics in one listener in spring boot kafka
谁能给我一个春季启动kafka的小例子,在那我们可以在一个侦听器类中使用多个主题。
application.yml application.yml
my:
kafka:
conf:
groupId: myId
topics: topic1,topicN
you listener: 您的听众:
@KafkaListener(groupId = "${my.kafka.conf.groupId}", topics = "#{'${my.kafka.conf.topics}'.split(',')}")
public void storeTopicsDataToMongo(
@Header(KafkaHeaders.RECEIVED_TOPIC) String topic,
@Header(required = false, name= KafkaHeaders.RECEIVED_MESSAGE_KEY) String key,
@Payload(required = false) String record)
{
log.trace(format("Received topic[%s] key[%s] payload[%s]", topic, key, record));
//your code
}
or you can explore the @ConfigurationProperties
and create the beans yourself, something like: 或者,您可以探索
@ConfigurationProperties
并自己创建Bean,例如:
@Component
@ConfigurationProperties(prefix = "my.kafka.conf")
@Data //=> lombok
public class ConsumerConfigurationProperties {
private String groupId;
private List<String> topics;
}
For consumers part of consumer group you can use following: 对于消费者组的消费者,您可以使用以下方法:
@KafkaListener(topics = "topic1,") public void listen(@Payload KafkaBinding record, MessageHeaders headers) throws ExecutionException, InterruptedException { ……… ……….. } @KafkaListener(topics =“ topic1,”)公共无效监听(@Payload KafkaBinding记录,MessageHeaders标头)引发ExecutionException,InterruptedException {……………………..}
For consumers acting as assign you can use following: 对于充当分配者的消费者,您可以使用以下方法:
@KafkaListener(id = “foo”,topicPartitions = { @TopicPartition(topic = “myTopic”,partitions = { “1” })}) public void listen(@Payload KafkaBinding record, MessageHeaders headers) throws ExecutionException, InterruptedException { ……… ……….. } @KafkaListener(id =“ foo”,topicPartitions = {@TopicPartition(topic =“ myTopic”,partitions = {“ 1”})})公共无效监听(@Payload KafkaBinding记录,MessageHeaders标头)引发ExecutionException,InterruptedException {…… …………..}
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