什么都不必说--rabbitmq手动应答

场景:业务需要,如果在消费者端出现异常或者特殊情况下,需要让消息回到队列再次进行消耗

在redisConfig中进行设置

@Autowired
private TestReceiver testReceiver ;

@Bean
    public SimpleMessageListenerContainer qrcodeListenerContainer(ConnectionFactory connectionFactory) {
        SimpleMessageListenerContainer factory = new SimpleMessageListenerContainer(connectionFactory);
        factory.setQueues(test());
        factory.setConcurrentConsumers(3);
        factory.setExposeListenerChannel(true);
        factory.setAcknowledgeMode(AcknowledgeMode.MANUAL); //设置手动应答
        factory.setMessageConverter(new Jackson2JsonMessageConverter());
        factory.setMessageListener(testReceiver);
        return factory;
    }
    
@Bean
public Queue test(){
    return new Queue(Constants.QUEUE_NAME_ALI_DYNAMIC_QR_CODE,false);
}

接收者类

@Component
public class TestReceiver implements ChannelAwareMessageListener{
     @Override
    public void onMessage(Message message, Channel channel) throws Exception {
    
        //消息转换
        Jackson2JsonMessageConverter converter = new Jackson2JsonMessageConverter();
        Object object = converter.fromMessage(message);
        
        //业务代码...
        
         //手动确认应答
        channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
        
        //手动否定
        channel.basicNack(message.getMessageProperties().getDeliveryTag(), false,true);
    }
}