背景
实际开发中，不同的topic可能来自不同的集群，所以就需要配置不同的kafka数据源，基于springboot自动配置的思想，最终通过配置文件的配置，自动生成生产者及消费者的配置。
核心配置
自动化配置类
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | import com.example.kafka.autoconfig.CustomKafkaDataSourceRegister;import com.example.kafka.autoconfig.kafkaConsumerConfig;import org.springframework.beans.BeansException;import org.springframework.beans.factory.BeanFactory;import org.springframework.beans.factory.BeanFactoryAware;import org.springframework.beans.factory.config.SmartInstantiationAwareBeanPostProcessor;import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;import org.springframework.boot.context.properties.EnableConfigurationProperties;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.Import;import org.springframework.kafka.annotation.EnableKafka;@EnableKafka@Configuration( proxyBeanMethods = false)@ConditionalOnWebApplication@EnableConfigurationProperties({kafkaConsumerConfig.class})@Import({CustomKafkaDataSourceRegister.class})public class MyKafkaAutoConfiguration implements BeanFactoryAware, SmartInstantiationAwareBeanPostProcessor { public MyKafkaAutoConfiguration() { } public void setBeanFactory(BeanFactory beanFactory) throws BeansException { beanFactory.getBean(CustomKafkaDataSourceRegister.class); }} |
注册生产者、消费者核心bean到spring
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | public void afterPropertiesSet() { Map factories = kafkaConsumerConfig.getFactories(); if (factories != null && !factories.isEmpty()) { factories.forEach((factoryName, consumerConfig) -> { KafkaProperties.Listener listener = consumerConfig.getListener(); Integer concurrency = consumerConfig.getConcurrency(); // 创建监听容器工厂 ConcurrentKafkaListenerContainerFactory containerFactory = createKafkaListenerContainerFactory(consumerConfig.buildProperties(), listener, concurrency); // 注册到容器 if (!beanFactory.containsBean(factoryName)) { beanFactory.registerSingleton(factoryName, containerFactory); } }); } Map templates = kafkaProducerConfig.getTemplates(); if (!ObjectUtils.isEmpty(templates)) { templates.forEach((templateName, producerConfig) -> { //registerBean(beanFactory, templateName, KafkaTemplate.class, propertyValues); //注册spring bean的两种方式 registerBeanWithConstructor(beanFactory, templateName, KafkaTemplate.class, producerFactoryValues(producerConfig.buildProperties())); }); } } |
配置spring.factories
1 2 | org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.example.kafka.MyKafkaAutoConfiguration |
yml配置
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | spring: kafka: multiple: consumer: factories: test-factory: key-deserializer: org.apache.kafka.common.serialization.StringDeserializer value-deserializer: org.apache.kafka.common.serialization.StringDeserializer bootstrap-servers: 192.168.56.112:9092 group-id: group_a concurrency: 25 fetch-min-size: 1048576 fetch-max-wait: 3000 listener: type: batch properties: spring-json-trusted-packages: '*' key-deserializer: org.apache.kafka.common.serialization.StringDeserializer value-deserializer: org.apache.kafka.common.serialization.StringDeserializer auto-offset-reset: latest producer: templates: test-template: bootstrap-servers: 192.168.56.112:9092 key-serializer: org.apache.kafka.common.serialization.StringSerializer value-serializer: org.apache.kafka.common.serialization.StringSerializer key-serializer: org.apache.kafka.common.serialization.StringSerializer value-serializer: org.apache.kafka.common.serialization.StringSerializer |
使用
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