如何进行kafka批量消费多消费者问题分析
今天就跟大家聊聊有关如何进行kafka批量消费多消费者问题分析，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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package com.llw.medical.bs.listener;import org.apache.kafka.clients.consumer.ConsumerRecord;import org.springframework.kafka.annotation.KafkaListener;import org.springframework.kafka.annotation.TopicPartition;import org.springframework.stereotype.Component;import java.util.List;import java.util.Optional;@Componentpublic class KafakaListener {@KafkaListener(id = "1", topics = {"topic2"})public void listen(ConsumerRecord record) {
Optional kafkaMessage = Optional.ofNullable(record.value());if (kafkaMessage.isPresent()) {
Object message = kafkaMessage.get();
System.out.println("----------------- record =" + record);
System.out.println("----------------- message =" + message);
}
}@KafkaListener(id = "2", topicPartitions =
{@TopicPartition(topic = "topic1",
partitions = {"1", "2", "3"}// partitionOffsets = @PartitionOffset(partition = "1", initialOffset = "4") )
})public void listen2(ConsumerRecord record) {
Optional kafkaMessage = Optional.ofNullable(record.value());if (kafkaMessage.isPresent()) {
Object message = kafkaMessage.get();
System.out.println("----------------- record 1=" + record);
System.out.println("------------------ message 1=" + message);
}
}//id = "4", //id="4" @KafkaListener( id= "4",groupId = "1",topics="topic1", /*topicPartitions = {@TopicPartition(topic = "topic1", partitions = {"0"} // partitionOffsets = @PartitionOffset(partition = "1", initialOffset = "4") )*//* },*/ containerFactory = "kafkaBatchListener6")public void listen3(List> records) {//, Acknowledgment ack try {for (ConsumerRecord record : records) {
Optional kafkaMessage = Optional.ofNullable(record.value());if (kafkaMessage.isPresent()) {
Object message = kafkaMessage.get();
System.out.println("----------------- record 4=" + record);// System.out.println("------------------ message 4=" + message); }
}
} finally {// ack.acknowledge(); }
}//id="5" @KafkaListener(id = "5",groupId = "1",topics="topic1", /*topicPartitions = {@TopicPartition(topic = "topic1", partitions = {"0"} // partitionOffsets = @PartitionOffset(partition = "1", initialOffset = "4") ) },*/ containerFactory = "kafkaBatchListener6")public void listen2(List> records) {//, Acknowledgment ack try {for (ConsumerRecord record : records) {
Optional kafkaMessage = Optional.ofNullable(record.value());if (kafkaMessage.isPresent()) {
Object message = kafkaMessage.get();
System.out.println("----------------- record 6=" + record);// System.out.println("------------------ message 6=" + message); }
}
} finally {// ack.acknowledge(); }
}//https://www.cnblogs.com/linjiqin/p/13171789.html @KafkaListener(id = "6",groupId = "1",topics="topic1",/* topicPartitions = {@TopicPartition(topic = "topic1", partitions = {"0"} // partitionOffsets = @PartitionOffset(partition = "1", initialOffset = "4") ) }, */containerFactory = "kafkaBatchListener6")public void listen4(List> records) {try {for (ConsumerRecord record : records) {
Optional kafkaMessage = Optional.ofNullable(record.value());if (kafkaMessage.isPresent()) {
Object message = kafkaMessage.get();
System.out.println("----------------- record 3=" + record);// System.out.println("------------------ message 6=" + message); }
}
} finally {// ack.acknowledge(); }
}
} 一个partition只能有一个消费者，如果多个消费者会是广播模式，每个消费者都会有一条数据，kafka是一个发布和订阅模式的主键，并不是队列模式，
spring boot整合时，如果使用topicPartitions 注解参数指定partition会有消息重复消费的问题，最好使用topics注解，并指定groupId。
看完上述内容，你们对如何进行kafka批量消费多消费者问题分析有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。
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