在Spring Boot中设置Kafka幂等生成器可以通过以下步骤实现:
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
</dependency>
spring.kafka.bootstrap-servers=localhost:9092
spring.kafka.consumer.group-id=my-group
@KafkaListener
注解来定义一个Kafka监听器,示例如下:import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.TopicPartition;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.core.ConsumerFactory;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
import org.springframework.kafka.listener.ContainerProperties;
import org.springframework.kafka.listener.KafkaMessageListenerContainer;
import org.springframework.kafka.listener.MessageListener;
import org.springframework.kafka.listener.config.ContainerProperties;
import org.springframework.stereotype.Component;
@Component
public class KafkaConsumer {
@KafkaListener(topics = "my-topic")
public void listen(ConsumerRecord<String, String> record) {
// 在这里处理接收到的消息
}
// 设置幂等生成器
@Bean
public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory());
factory.getContainerProperties().setAckMode(ContainerProperties.AckMode.MANUAL_IMMEDIATE);
factory.getContainerProperties().setSyncCommits(true);
factory.getContainerProperties().setCommitCallback((offsets, exception) -> {
// 在这里处理提交回调
});
return factory;
}
private ConsumerFactory<String, String> consumerFactory() {
Map<String, Object> props = new HashMap<>();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
props.put(ConsumerConfig.GROUP_ID_CONFIG, "my-group");
// 设置幂等生成器
props.put(ConsumerConfig.ENABLE_IDEMPOTENCE_CONFIG, true);
return new DefaultKafkaConsumerFactory<>(props);
}
}
在上述代码中,我们通过@KafkaListener
注解定义了一个Kafka监听器,并在kafkaListenerContainerFactory()
方法中设置了幂等生成器。通过ConsumerConfig.ENABLE_IDEMPOTENCE_CONFIG
属性将幂等生成器设置为true。
关于Kafka的更多信息和使用方法,你可以参考腾讯云的相关产品和文档:腾讯云消息队列 CKafka
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