springboot 开启和关闭kafka消费_springboot不启用kafka

关闭kafka自动消费

配置自定义容器工厂

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.core.ConsumerFactory;
import org.springframework.stereotype.Component;

@Component
@Configuration
public class kafkaConfig {

    @Autowired
    private ConsumerFactory<String, String> consumerFactory;

    @Bean("pingKafkaFactory")
    public ConcurrentKafkaListenerContainerFactory<String, String> delayContainerFactory() {
        ConcurrentKafkaListenerContainerFactory<String, String> container = new ConcurrentKafkaListenerContainerFactory<String, String>();
        container.setConsumerFactory(consumerFactory);
        //禁止自动启动
        container.setAutoStartup(false);
        return container;
    }
}

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在消费监听器上使用工厂，并设置id

@KafkaListener(topics = "#{pingProperties.getTopic().split(',')}",id = "pingConsumer",containerFactory = "pingKafkaFactory")
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这样，启动项目后，就不会自动消费了。

手动开启和关闭消费

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.config.KafkaListenerEndpointRegistry;
import org.springframework.stereotype.Service;

/**
 * Kafka消费监听服务实现类.
 */
@Service
@Slf4j
public class KafkaConsumerListenerServiceImpl implements KafkaConsumerListenerService {


    /**
     * registry.
     */
    @Autowired
    private KafkaListenerEndpointRegistry registry;

    /**
     * 开启监听.
     *
     * @param listenerId 监听ID
     */
    @Override
    public void startListener(String listenerId) {
        //判断监听容器是否启动，未启动则将其启动
        if (!registry.getListenerContainer(listenerId).isRunning()) {
            registry.getListenerContainer(listenerId).start();
        }
        //项目启动的时候监听容器是未启动状态，而resume是恢复的意思不是启动的意思
        //registry.getListenerContainer(listenerId).stop();
        log.info(listenerId + "开启监听成功。");
    }

    /**
     * 停止监听.
     *
     * @param listenerId 监听ID
     */
    @Override
    public void stopListener(String listenerId) {
        registry.getListenerContainer(listenerId).stop();
        log.info(listenerId + "停止监听成功。");
    }

}
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