使用@KafkaListener处理错误

时间:2017-03-24 19:27:31

标签: java spring spring-kafka

我使用spring-kafka使用以下配置:

package com.danigu.fancypants.infrastructure;

import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.Data;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.core.ConsumerFactory;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
import org.springframework.kafka.support.converter.StringJsonMessageConverter;
import org.springframework.retry.RetryPolicy;
import org.springframework.retry.backoff.BackOffPolicy;
import org.springframework.retry.backoff.ExponentialBackOffPolicy;
import org.springframework.retry.policy.SimpleRetryPolicy;
import org.springframework.retry.support.RetryTemplate;

import javax.inject.Inject;
import java.util.HashMap;
import java.util.Map;

/**
 * @author dani
 */
@Data
@EnableKafka
@Configuration
@Import({KafkaConfigurationProperties.class})
public class KafkaConfiguration {
    @Inject KafkaConfigurationProperties kcp;

    protected Map<String, Object> consumerProperties() {
        Map<String, Object> props = new HashMap();
        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, kcp.getBrokerAddress());
        props.put(ConsumerConfig.GROUP_ID_CONFIG, kcp.getGroupId());
        props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, false);
        props.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, 15000);
        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        return props;
    }

    public ConsumerFactory<String, String> consumerFactory() {
        return new DefaultKafkaConsumerFactory<>(consumerProperties());
    }

    @Bean
    public StringJsonMessageConverter stringJsonMessageConverter(ObjectMapper mapper) {
        return new StringJsonMessageConverter(mapper);
    }

    @Bean
    public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory(
            StringJsonMessageConverter messageConverter) {
        ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory();

        factory.setMessageConverter(messageConverter);
        factory.setConsumerFactory(consumerFactory());
        factory.setConcurrency(1);
        factory.setRetryTemplate(retryTemplate());

        return factory;
    }

    /*
     * Retry template.
     */

    protected RetryPolicy retryPolicy() {
        SimpleRetryPolicy policy = new SimpleRetryPolicy();
        policy.setMaxAttempts(3);
        return policy;
    }

    protected BackOffPolicy backOffPolicy() {
        ExponentialBackOffPolicy policy = new ExponentialBackOffPolicy();
        policy.setInitialInterval(1000);
        return policy;
    }

    protected RetryTemplate retryTemplate() {
       RetryTemplate template = new RetryTemplate();

       template.setRetryPolicy(retryPolicy());
       template.setBackOffPolicy(backOffPolicy());

       return template;
    }
}

我的听众看起来像这样:

package com.danigu.fancypants.integration.inbound.dress;

import com.danigu.fancypants.integration.inbound.InvalidRequestException;
import com.danigu.fancypants.integration.inbound.dress.payload.DressRequest;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.kafka.listener.AcknowledgingMessageListener;
import org.springframework.kafka.support.Acknowledgment;
import org.springframework.messaging.handler.annotation.Payload;
import org.springframework.stereotype.Component;

import javax.inject.Inject;
import javax.validation.ConstraintViolation;
import javax.validation.Validator;
import java.util.Set;

/**
 * @author dani
 */
@Component
public class DressListener {

    @Inject protected Validator validator;

    @KafkaListener(topics = {"${kafka.dressesTopic}"})
    public void onMessage(@Payload DressRequest request, Acknowledgment acknowledgment) {
        assertValidRequest(request);

        System.out.println(request);

        acknowledgment.acknowledge();
    }

    protected void assertValidRequest(DressRequest request) {
        final Set<ConstraintViolation<DressRequest>> violations = validator.validate(request);

        if(!violations.isEmpty()) {
            throw new InvalidRequestException(violations, request);
        }
    }
}

到目前为止,我一直在查看spring-kafkathere的测试和参考文档,文档说应该配置相应类型的ErrorHandler,这个{ {3}}暗示我应该在ContainerProperties上配置它,虽然,在我的用例中,我只想定义多个(对于不同的有效载荷类型),这是唯一的错误处理程序,这是可能的,如果是的话,怎么样?

另外,有没有办法可以描述在带注释的侦听器void上使用哪个错误处理程序?

另外,有没有办法描述RecoveryCallback@KafkaListener或每个不同的主题,或者必须有不同的ListenerContainerFactory

我可能会完全错误,有人能指出我正确的方向我如何以正确的方式为不同的有效载荷类型配置多个ErrorHandler

2 个答案:

答案 0 :(得分:1)

我不确定你的意思是什么&#34;不同的有效载荷类型&#34;因为你只有一个@KafkaListener。对于不同的有效负载类型,类级别的@KafkaListener可以在方法级别具有@KafkaHandler

在任何情况下,每个容器只有一个错误处理程序,因此每个错误处理程序都需要一个不同的容器工厂(恢复回调也是如此)。

我们最近在errorHandler中的@RabbitListener添加了spring-amqp ...

/**
 * Set an {@link RabbitListenerErrorHandler} to invoke if the listener method throws
 * an exception.
 * @return the error handler.
 * @since 2.0
 */
String errorHandler() default "";

...所以每个方法都有自己的错误处理程序。

我们可能会为spring-kafka的下一个版本做类似的事情。但是对于每个@KafkaListener,它仍然只有一个,所以它对类级别@KafkaListener没有帮助。

答案 1 :(得分:0)

如果您有兴趣,也可以查看简单方法我是处理错误 here