系列文章目录
文章目录
- 系列文章目录
- 前言
-
-
- 一、本文要点
- 二、开发环境
- 三、创建项目
- 四、修改项目
- 五、测试一下
- 六、小结
-
前言
在日常开发当中，经常会遇到需要消费的topic不在同一个kafka集群内，这时候需要配置多个数据源，如何优雅地完成这个配置呢？
一、本文要点
接前文，我们已经在项目里集成了kafka。本文将介绍如何优雅地整合多个kafka数据源。系列文章完整目录
- springboot 整合多个kafka数据源
- springboot 整合多个消费者topic
- kafka listener 配置factory
二、开发环境
- jdk 1.8
- maven 3.6.2
- springboot 2.4.3
- kafka 2.12-2.3
- idea 2020
三、创建项目
1、使用早期文章快速创建项目。
《搭建大型分布式服务（十二）Docker搭建开发环境安装Kafka和zookeeper》
《搭建大型分布式服务（十三）SpringBoot整合kafka》
《搭建大型分布式服务（十八）Maven自定义项目脚手架》
2、创建Ticket项目
mvn archetype:generate -DgroupId="com.mmc.lesson" -DartifactId="ticket" -Dversion=1.0-SNAPSHOT -Dpackage="com.mmc.lesson" -DarchetypeArtifactId=member-archetype -DarchetypeGroupId=com.mmc.lesson -DarchetypeVersion=1.0.0-SNAPSHOT -B
四、修改项目
1、编写KafkaPropertiesConfiguration.java，用来接收两个kafka配置。
@Configuration
public class KafkaPropertiesConfiguration {
/**
* one的kafka配置.
*/
@Bean("oneKafkaProperties")
@ConfigurationProperties("spring.one.kafka")
public CustomKafkaProperties oneKafkaProperties() {
return new CustomKafkaProperties();
}
/**
* two的kafka配置.
*/
@Bean("twoKafkaProperties")
@ConfigurationProperties("spring.two.kafka")
public CustomKafkaProperties twoKafkaProperties() {
return new CustomKafkaProperties();
}
@Data
public static class CustomKafkaProperties {
private final Consumer consumer = new Consumer();
/**
* Create an initial map of consumer properties from the state of this instance.
* <p>
* This allows you to add additional properties, if necessary, and override the
* default kafkaConsumerFactory bean.
*
* @return the consumer properties initialized with the customizations defined on this
* instance
*/
public Map<String, Object> buildConsumerProperties() {
return new HashMap<>(this.consumer.buildProperties());
}
}
}
2、编写KafkaConsumerConfiguration.java，定义两个消费工厂。
@Configuration
@AutoConfigureAfter(KafkaPropertiesConfiguration.class)
public class KafkaConsumerConfiguration {
@Value("${spring.kafka.listener.type:batch}")
private String listenerType;
/**
* 消费one数据.
*/
@Bean("oneContainerFactory")
public ConcurrentKafkaListenerContainerFactory<Object, Object> oneContainerFactory(
@Qualifier("oneKafkaProperties")
CustomKafkaProperties kafkaProperties) {
ConcurrentKafkaListenerContainerFactory<Object, Object> container =
new ConcurrentKafkaListenerContainerFactory<>();
container.setConsumerFactory(new DefaultKafkaConsumerFactory<>(kafkaProperties.buildConsumerProperties()));
// 设置并发量，小于或等于Topic的分区数
// container.setConcurrency(5);
// 设置为批量监听
container.setBatchListener("batch".equalsIgnoreCase(listenerType));
return container;
}
/**
* 消费two数据.
*/
@Bean("twoContainerFactory")
public ConcurrentKafkaListenerContainerFactory<Object, Object> twoContainerFactory(
@Qualifier("twoKafkaProperties")
CustomKafkaProperties kafkaProperties) {
ConcurrentKafkaListenerContainerFactory<Object, Object> container =
new ConcurrentKafkaListenerContainerFactory<>();
container.setConsumerFactory(new DefaultKafkaConsumerFactory<>(kafkaProperties.buildConsumerProperties()));
// 设置并发量，小于或等于Topic的分区数
// container.setConcurrency(5);
// 设置为批量监听
container.setBatchListener("batch".equalsIgnoreCase(listenerType));
return container;
}
}
3、编写KafkaReceiver.java，消费两个topic的数据。
@Service
@Slf4j
public class KafkaReceiver {
@KafkaListener(id = "kafka-one-demo",
topics = Const.KAFKA_ONE_DEMO_TOPIC,
groupId = "oneGroup",
containerFactory = "oneContainerFactory")
public void receiveOne(ConsumerRecord<String, String> record) {
if (null == record || !StringUtils.hasText(record.value())) {
log.warn("KafkaReceiver record is null or record.value is empty.");
return;
}
String reqJson = record.value();
log.info("one KafkaReceiver {}", reqJson);
}
@KafkaListener(id = "kafka-two-demo",
topics = Const.KAFKA_TWO_DEMO_TOPIC,
groupId = "twoGroup",
containerFactory = "twoContainerFactory")
public void receiveTwo(ConsumerRecord<String, String> record) {
if (null == record || !StringUtils.hasText(record.value())) {
log.warn("KafkaReceiver record is null or record.value is empty.");
return;
}
String reqJson = record.value();
log.info("two KafkaReceiver {}", reqJson);
}
}
4、修改application-dev.properties 增加双kafka配置，其它环境同理（可以放到Apollo托管）。
#################### KAFKA ####################
## 以下为消费者配置
spring.kafka.listener.type=single
spring.kafka.listener.missing-topics-fatal=false
spring.ymall.kafka.consumer.bootstrapServers=127.0.0.1:9092
spring.ymall.kafka.consumer.auto-offset-reset=latest
spring.ymall.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.ymall.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.ymall.kafka.consumer.max-poll-records=50
spring.center.kafka.consumer.bootstrapServers=127.0.0.1:9092
spring.center.kafka.consumer.auto-offset-reset=latest
spring.center.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.center.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.center.kafka.consumer.max-poll-records=50
## 以下为单元测试生产者配置
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.buffer-memory=524288
spring.kafka.producer.batch-size=65536
spring.kafka.producer.bootstrap-servers=127.0.0.1:9092
五、测试一下
1、修改并运行单元测试
@Slf4j
@ActiveProfiles("dev")
@ExtendWith(SpringExtension.class)
@SpringBootTest
class KafkaSenderTest {
@Resource
private KafkaSender kafkaSender;
@Test
void sendMessage() throws IOException {
String json = "hello";
for (int i = 0; i < 1; i++) {
kafkaSender.sendMessage(Const.KAFKA_ONE_DEMO_TOPIC, json);
kafkaSender.sendMessage(Const.KAFKA_TWO_DEMO_TOPIC, json);
}
System.in.read();
}
}
2、测试通过。
[2021-08-19 17:09:02.203] [kafka-two-demo-0-C-1] [INFO] [o.s.kafka.listener.KafkaMessageListenerContainer:292] - twoGroup: partitions assigned: [kafka-single-demo-topic-0]
[2021-08-19 17:09:02.203] [kafka-one-demo-0-C-1] [INFO] [o.s.kafka.listener.KafkaMessageListenerContainer:292] - oneGroup: partitions assigned: [kafka-single-demo-topic-0]
[2021-08-19 17:09:09.721] [kafka-two-demo-0-C-1] [INFO] [com.mmc.lesson.kafka.KafkaReceiver:?] - two KafkaReceiver hello
[2021-08-19 17:09:12.736] [kafka-one-demo-0-C-1] [INFO] [com.mmc.lesson.kafka.KafkaReceiver:?] - one KafkaReceiver hello
六、小结
至此，我们就优雅地整合多个kafka消费者数据源，小伙伴们可以发挥自己的动手能力，配置多个生产者哦。下一篇《搭建大型分布式服务（二十三）Springboot 拓展-定制日志组件》
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