备份交换器是为了实现没有路由到队列的消息,声明交换机的时候添加属性alternate-exchange,声明一个备用交换机,一般声明为fanout类型,这样交换机收到路由不到队列的消息就会发送到备用交换机绑定的队列中。 使用Python的pika包,设置方式是在声明exchange时,argument的参数中设置alternate-exchange的值,值为备份交换机的名称。
说明 在掌握了mandatory参数和alternate-exchange配置之后,需要结合自己的业务本身来灵活使用他们俩,我给的第二个示例中是两个都使用了,这样就能够做到有始有终,即使消息不能达到备份交换器的队列,也可以返回给消息发送者,这样消息发送者就能根据自身业务对消息进行处理。 当然了,你完全可以只使用其中一个,或者都不使用。
如果既不想复杂化生产者的编程逻辑,又不想消息丢失,那么可以使用备份交换器。 可以通过在声明交换器(调用 channel.exchangeDeclare 方法)的时候添加alternate-exchange 参数来实现。 Map<String,Object>args=newHashMap<String,Object>();args.put("alternate-exchange","myAe");channel.exchangeDeclare...
zhihao.miao.exchange.pay 是个包含 alternate-exchange 属性的 topic 类型的 exchange （route key是 zhihao.miao.pay.* ，队列名是 zhihao.miao.pay )， alternate-exchange 属性指定的是 fanout 类型的exchange,exchange的名称是 zhihao.miao.exchange.order （绑定到 zhihao.miao.order 队列）如果正确...
2.32.RabbitMQ高级特性-交换机属性alternate exchange 2.33.RabbitMQ高级特性-延时队列方案一 2.34.RabbitMQ高级特性-延时队列方案二-下载与安装 2.35.RabbitMQ高级特性-延时队列方案二-管理控制台演示 2.36.RabbitMQ高级特性-延时队列方案二-代码演示 2.37.RabbitMQ高级特性-消息确认机制-生产者 2.38.RabbitMQ高级特性-消...
考查动词词义辨析。alternate vt./vi. 轮流,交替发生或出现;shift般动,移动(vt.);转移到,迁移(vi.);改变;exchange交换;exchange... for ... 用...换...;alter(部分)修改。 练习册系列答案 课课练与单元测试系列答案 世纪金榜小博士单元期末一卷通系列答案 单元测试AB卷...
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It looks like we don't have any alternate versions for this title yet. Be the first to contribute.Learn more Contribute to this page Suggest an edit or add missing content Top Gap What is the English language plot outline for The Exchange (2022)?Answer See more gaps Learn more about cont...
PURPOSE:To shorten a loss time and to improve productivity by feeding the other casting mold into a casting machine while one casting mold on a conveyor is held standing by, ejecting the casting mold after casting and feeding the casting mold under standing by into the machine while the ...
The ability to send messages as an alternate email addresses (also referred to as proxy addresses or aliases) has been a much-requested feature missing from Exchange Sever and Microsoft Outlook. Here are some workarounds that show you how to send email u