1.spring-kafka
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>1.3.5.RELEASE</version>
</dependency>
2.配置文件相关信息
kafka.bootstrap-servers=localhost:9092
kafka.consumer.group.id=20230321
#可以并发消费的线程数 (通常与partition数量一致)
kafka.consumer.concurrency=10
kafka.consumer.enable.auto.commit=false
kafka.bootstrap-servers.pic=localhost:29092
kafka.consumer.group.id.pic=20230322_pic
kafka.consumer.concurrency.pic=10
kafka.consumer.enable.auto.commit.pic=false
3.kafka配置类
@Configuration
@EnableKafka
public class KafkaConsumerConfig {
@Value("${kafka.consumer.group.id}")
private String groupId;
@Value("${kafka.consumer.concurrency}")
private int concurrency;
@Value("${kafka.consumer.enable.auto.commit}")
private String autoCommit;
@Value("${kafka.bootstrap-servers}")
private String bootstrapServer;
@Value("${kafka.consumer.group.id.pic}")
private String groupIdPic;
@Value("${kafka.consumer.concurrency.pic}")
private int concurrencyPic;
@Value("${kafka.consumer.enable.auto.commit.pic}")
private String autoCommitPic;
@Value("${kafka.bootstrap-servers.pic}")
private String bootstrapServerPic;
@Bean
public ConsumerFactory<String, String> consumerFactory() {
String bootstrapServers = bootstrapServer;
Map<String, Object> configProps = new HashMap<>(16);
configProps.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
configProps.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
configProps.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
configProps.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);
configProps.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, autoCommit);
return new DefaultKafkaConsumerFactory<>(configProps);
}
@Bean
public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, String> factory =
new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory());
factory.setConcurrency(concurrency);
factory.getContainerProperties().setAckMode(AbstractMessageListenerContainer.AckMode.MANUAL_IMMEDIATE);
return factory;
}
@Bean
public ConsumerFactory<String, String> consumerFactoryPic() {
String bootstrapServers = bootstrapServerPic;
Map<String, Object> configProps = new HashMap<>(16);
configProps.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
configProps.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
configProps.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
configProps.put(ConsumerConfig.GROUP_ID_CONFIG, groupIdPic);
configProps.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, autoCommitPic);
return new DefaultKafkaConsumerFactory<>(configProps);
}
@Bean
public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactoryPic() {
ConcurrentKafkaListenerContainerFactory<String, String> factory =
new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactoryPic());
factory.setConcurrency(concurrencyPic);
factory.getContainerProperties().setAckMode(AbstractMessageListenerContainer.AckMode.MANUAL_IMMEDIATE);
return factory;
}
}
4.消费主题消息
@KafkaListener(topics = "xxxxx", containerFactory = "kafkaListenerContainerFactoryPic")
public void receive(ConsumerRecord<String, String> message, Acknowledgment ack) {
try {
String jsonString = message.value();
if (StringUtils.isNoneBlank(jsonString)) {
log.info("消费:{}",jsonString);
//TODO ....
}
} catch (Exception e) {
log.error(" receive topic error ", e);
} finally {
ack.acknowledge();
}
}
@KafkaListener(topics = "xxxxxx", containerFactory = "kafkaListenerContainerFactory")
public void receive(ConsumerRecord<String, String> message, Acknowledgment ack) {
try {
if (StringUtils.isNoneBlank(message.value())) {
//TODO ....
}
} catch (Exception e) {
logger.error(" receive topic error ", e);
} finally {
ack.acknowledge();
}
}
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