下面是关于springboot项目配置多个kafka的攻略。
配置pom.xml文件
首先,在pom.xml文件中添加kafka和spring-kafka的依赖:
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>2.5.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>2.6.0</version>
</dependency>
配置application.yml文件
接着,在application.yml文件中添加多个kafka的配置,例如:
# kafka1
spring.kafka.producer.bootstrap-servers: localhost:9092
spring.kafka.producer.key-serializer: org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer: org.apache.kafka.common.serialization.StringSerializer
spring.kafka.consumer.bootstrap-servers: localhost:9092
spring.kafka.consumer.group-id: group-1
spring.kafka.consumer.key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.consumer.value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
# kafka2
spring.kafka2.producer.bootstrap-servers: localhost:9093
spring.kafka2.producer.key-serializer: org.apache.kafka.common.serialization.StringSerializer
spring.kafka2.producer.value-serializer: org.apache.kafka.common.serialization.StringSerializer
spring.kafka2.consumer.bootstrap-servers: localhost:9093
spring.kafka2.consumer.group-id: group-2
spring.kafka2.consumer.key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
spring.kafka2.consumer.value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
编写示例代码
最后,便可以编写示例代码。这里提供两个示例:
示例一
下面是一个发送消息到多个kafka集群的示例代码:
@Service
public class KafkaProducerService {
@Autowired
@Qualifier("kafkaTemplate1")
private KafkaTemplate<String, Object> kafkaTemplate1;
@Autowired
@Qualifier("kafkaTemplate2")
private KafkaTemplate<String, Object> kafkaTemplate2;
public void sendMessage(String message) {
kafkaTemplate1.send("topic1", message);
kafkaTemplate2.send("topic2", message);
}
}
示例二
下面是一个从多个kafka集群中获取消息的示例代码:
@Service
public class KafkaConsumerService {
@KafkaListener(topics = "topic1", groupId = "group-1")
public void receiveMessageFromKafka1(String message) {
System.out.println("Received message from kafka1: " + message);
}
@KafkaListener(topics = "topic2", groupId = "group-2")
public void receiveMessageFromKafka2(String message) {
System.out.println("Received message from kafka2: " + message);
}
}
总结
以上就是配置springboot项目多个kafka集群的攻略以及两条示例代码。在配置过程中,需要注意多个kafka集群的配置内容,以及在代码中指定使用的kafkaTemplate和消费者监听的topic和groupId。
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