Question

我有一个webjob应用程序来处理运行良好的ServiceBus队列，使用以下方法：

public static void ProcessQueueMessage([ServiceBusTrigger("myQueueName")] BrokeredMessage message, TextWriter log)

但是，我希望能够在不重新编译的情况下更改队列名称，例如根据配置appsetting，可以这样做吗？

Answer 1

是的，你可以这样做。您可以实施自己的 INameResolver 并将其设置在 JobHostConfiguration.NameResolver 上。然后，您可以在ServiceBusTrigger属性中使用类似％myqueue％的队列名称 - 运行时将调用您的INameResolver来解析该％myqeuue％变量 - 您可以使用您想要的任何自定义代码来解析名称。您可以从应用程序设置等中读取它。

Answer 2

我使用azure-webjobs-sdk-samples中的配置设置找到了INameResolver的实现。

/// <summary>
/// Resolves %name% variables in attribute values from the config file.
/// </summary>
public class ConfigNameResolver : INameResolver
{
    /// <summary>
    /// Resolve a %name% to a value from the confi file. Resolution is not recursive.
    /// </summary>
    /// <param name="name">The name to resolve (without the %... %)</param>
    /// <returns>
    /// The value to which the name resolves, if the name is supported; otherwise throw an <see cref="InvalidOperationException"/>.
    /// </returns>
    /// <exception cref="InvalidOperationException"><paramref name="name"/>has not been found in the config file or its value is empty.</exception>
    public string Resolve(string name)
    {
        var resolvedName = CloudConfigurationManager.GetSetting(name);
        if (string.IsNullOrWhiteSpace(resolvedName))
        {
            throw new InvalidOperationException("Cannot resolve " + name);
        }

        return resolvedName;
    }
}

如何为Web作业处理设置基于配置的队列名称？

2 个答案: