如何在运行时设置Azure WebJob队列名称? [英] How to set Azure WebJob queue name at runtime?

问题描述

我正在开发要与多个Azure网站一起使用的Azure WebJobs可执行文件.每个网站都需要自己的Azure存储队列.

I am developing an Azure WebJobs executable that I would like to use with multiple Azure websites. Each web site would need its own Azure Storage queue.

我看到的问题是ProcessQueueMessage要求将队列名称静态定义为第一个参数inputText的属性.我希望队列名称是正在运行的Azure网站实例的配置属性，并让作业可执行文件在启动时在运行时读取该内容.

The problem I see is that the ProcessQueueMessage requires the queue name to be defined statically as an attribute of the first parameter inputText. I would rather have the queue name be a configuration property of the running Azure Website instance, and have the job executable read that at runtime when it starts up.

有什么办法吗?

推荐答案

现在可以完成此操作.只需创建一个INameResolver，即可解析任何用％(百分号)符号包围的字符串.例如，如果这是您的函数，并且指定了队列名称:

This can now be done. Simply create an INameResolver to allow you to resolve any string surrounded in % (percent) signs. For example, if this is your function with a queue name specified:

public static void WriteLog([QueueTrigger("%logqueue%")] string logMessage)
{
    Console.WriteLine(logMessage);
}

注意字符串logqueue周围如何有％(百分号)符号.这意味着作业系统将尝试使用INameResolver解析该名称，您可以创建INameResolver然后注册您的作业.

Notice how there are % (percent) signs around the string logqueue. This means the job system will try to resolve the name using an INameResolver which you can create and then register with your job.

这里是一个解析器的示例，该解析器将只使用百分号中指定的字符串并在配置文件的AppSettings中查找它:

Here is an example of a resolver that will just take the string specified in the percent signs and look it up in your AppSettings in the config file:

public class QueueNameResolver : INameResolver
{
    public string Resolve(string name)
    {
        return ConfigurationManager.AppSettings[name].ToString();
    }
}

然后在Program.cs文件中，只需将其连接起来即可:

And then in your Program.cs file, you just need to wire this up:

var host = new JobHost(new JobHostConfiguration
{
  NameResolver = new QueueNameResolver()
});
host.RunAndBlock();

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