RabbitTemplate接收消息并重新排队 [英] RabbitTemplate receive messages and requeue

问题描述

我的问题与这一问题非常相似: RabbitTemplate接收并重新排队 不幸的是，尽管答案不符合我的需要，但已被标记为已回答.

My question is very similar to this one: RabbitTemplate receive and requeue Unfortunately it has been marked as answered though the answer doesn't suit my needs.

我想模仿Rabbit Admin UI的功能，即我想从队列中同步读取消息，但又不想让队列丢失它们，即像偷看一样.

I want to mimic the functionality of the Rabbit Admin UI, i.e. I want to synchronously read messages from a queue, but don't want the queue to lose them, i.e. something like having a peek.

此处的答案 RabbitTemplate接收和重新排队建议使用侦听器，但在这种情况下，会无限期地阅读和排队.我只想获取并重新排列消息一次，所以我想我应该使用RabbitTemplate而不是侦听器.

The answer here RabbitTemplate receive and requeue suggests using a listener, but in that case it'll read and requeue indefinitely. I want to get and requeue the messages just once, so I guess I should be using RabbitTemplate, not a listener.

推荐答案

class Peeker implements ChannelCallback<Message> {

    final MessagePropertiesConverter propertiesConverter = new DefaultMessagePropertiesConverter();

    @Override
    public Message doInRabbit(Channel channel) throws Exception {
        GetResponse result = channel.basicGet("someQ", false);
        if (result == null) {
            return null;
        }
        channel.basicReject(result.getEnvelope().getDeliveryTag(), true);
        return new Message(result.getBody(), propertiesConverter.toMessageProperties(
                result.getProps(), result.getEnvelope(), "UTF-8"));
    }
}
Peeker peeker = new Peeker();


...


Message peek = this.rabbitTemplate.execute(peeker);

这篇关于RabbitTemplate接收消息并重新排队的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！