azure - 不支持构造函数 'DisableAttribute(Type)'。为服务总线队列生成函数元数据时出错触发了 Azure 函数

Question

我尝试通过更新应用程序设置值来在运行时禁用函数应用程序。通过使用禁用属性的重载。但以下代码出现错误

using System.Reflection;
using System.Threading.Tasks;
using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;

namespace DisableFunctionApp
{
    public static class Function5
    {
        [Disable(typeof(DoWorkDisableProvider))]
        [FunctionName("Function5")]
        public static void Run([ServiceBusTrigger("cds-storage-queue", Connection = "dv-svcbus-events_RootManageSharedAccessKey_SERVICEBUS")]string myQueueItem, ILogger log)
        {
            log.LogInformation(System.Environment.GetEnvironmentVariable("MY_TIMER_DISABLED5", EnvironmentVariableTarget.Process));
            log.LogInformation($"function processed message: {myQueueItem}");
            Environment.SetEnvironmentVariable("MY_TIMER_DISABLED5", "1");           
        }
    }

    public class DoWorkDisableProvider
    {
        public bool IsDisabled(this MethodInfo method)
        {
            // check if the function should be disable
            // return true or false
            if (Convert.ToBoolean(System.Environment.GetEnvironmentVariable("MY_TIMER_DISABLED5", EnvironmentVariableTarget.Process)))
                return true;
            else
                return false;
        }
    }
}

错误，不支持构造函数“DisableAttribute(Type)”。生成函数元数据时出错

microsoft.net.sdk.functions:v3.0.7

对解决问题有任何帮助

Answer 1

你的代码应该是这样的:

    [Disable("MY_TIMER_DISABLED")]
    [FunctionName("Function1")]
    public static async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
        ILogger log)
    {
        log.LogInformation("C# HTTP trigger function processed a request.");
        return new OkObjectResult("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
    }

更改设置的步骤应该在函数应用程序的启动处进行。

您可以为“MY_TIMER_DISABLED”设置指定默认值。例如，这是我的设置:

{
    "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
    "MY_TIMER_DISABLED": "true"
  }
}

因此，通过上述设置，该功能将默认禁用。请告诉我是否可以解决:)