如何为Easynetq中的每个消费者声明自定义错误excahange？

Question

我有四个消费者，当错误发生时消息发布到默认值EasyNetQ_Default_Error_Queue是否有可能每个队列消费者编写自己的错误交换

例如;

Queue Name : A    ErrorExchange :A_ErrorExchange
Queue Name : B    ErrorExchange :B_ErrorExchange

bus.Advanced.Conventions.ErrorExchangeNamingConvention = new ErrorExchangeNameConvention(info => "A_DeadLetter");

bus.Advanced.Conventions.ErrorExchangeNamingConvention = new ErrorExchangeNameConvention(info2 => "B_DeadLetter");

Answer 1

根据您提供的代码，您似乎就在那里 - 您只需要适当地覆盖ErrorExchangeNamingConvention和ErrorQueueNamingConvention。

作为示例，这里是一个方法，它将返回IBus的实例，并覆盖这些约定以合并指定的使用者名称：

public IBus CreateBus(string connectionString, string consumerName) 
{
    var bus = RabbitHutch.CreateBus(connectionString);

    // Modify the following to create your error exchange name appropriately
    bus.Advanced.Container.Resolve<IConventions>().ErrorExchangeNamingConvention = 
        info => consumerName + "_ErrorExchange";

    // Modify the following to create your error queue name appropriately
    bus.Advanced.Container.Resolve<IConventions>().ErrorQueueNamingConvention = 
        () => consumerName + "_ErrorQueue";

    return bus;
}