node.js - amqplib - 如何安全地检查队列是否存在

Question

我正在使用 nodejs 的 amqplib 库与 RabbitMQ 一起工作。我正在尝试使用函数 checkQueue 来检查队列是否存在:

mychannel.checkQueue('xxx', function (err, ok) { 
    console.log(err);
    console.log(ok)
});

但它不仅会抛出错误，还会关闭 channel 。如何安全地检查队列是否存在？

Answer 1

您不能不冒破坏 channel 的风险。解决方法是创建一个临时 channel ，您可以使用它来进行检查。

来自 amqp.node dev 的评论:( https://github.com/squaremo/amqp.node/issues/280 )

The behaviour of checkQueue is dictated by the protocol, but it can be worked around. One tactic is to create a "sacrificial" extra channel with which to test whether the queue exists. Once you have the answer, you can throw the extra channel away, or keep it around for more tests.