WebJob 和 ExceptionFilterAttribute

Question

我对我的 Web api 应用程序使用 ExceptionFilterAttribute 来捕获不同的未处理异常，即：

public class InvalidDriverExceptionAttribute : ExceptionFilterAttribute
{
    public override void OnException(HttpActionExecutedContext actionExecutedContext)
    {
        if (actionExecutedContext.Exception != null)
        {
            if (actionExecutedContext.Exception is Domain.InvalidDriverException)
            {
                var resp = actionExecutedContext.Request.CreateErrorResponse(HttpStatusCode.NotFound, "User is not a driver");
                actionExecutedContext.Response = resp;
            }
        }

        //base.OnException(actionExecutedContext);
    }
}

但我想为我的 Web 作业配备类似的引擎。可能吗？

Answer 1

but I want to have similar engine for my web job. Is it possible?

是的。但由于 Web 作业是连续的或按计划进行的，因此它们的实现方式存在一些差异。您可以使用 ErrorTrigger 来实现您的目标。一个错误触发器，允许您注释函数以在发生错误时由运行时自动调用。当它是 executed.My 演示结果时，它可以监控网络作业中的错误：filter null exception. For more details, you could refer to this article.

When developing jobs with Azure WebJob, it's a good practice to implement error monitoring in case something goes wrong when a job is executed.

The WebJobs ErrorTrigger extension, part of the Core extensions, will help us achieve that.

Answer 2

我已经从 FunctionExceptionFilterAttribute

创建派生 class

public class ErrorHandlerAttribute : FunctionExceptionFilterAttribute
{

    public override async Task OnExceptionAsync(FunctionExceptionContext exceptionContext, CancellationToken cancellationToken)
    {
        string body = $"ErrorHandler called. Function '{exceptionContext.FunctionName}': {exceptionContext.FunctionInstanceId} failed. ";
        CombineErrorWithAllInnerExceptions(exceptionContext.Exception, ref body);

        string[] emailList = System.Configuration.ConfigurationManager.AppSettings["SendErrorEmails"].Split(';');

        await SendEmail.SendErrorNotificationAsync("WebJob - Common Driver Error", body);
    }

    private void CombineErrorWithAllInnerExceptions(Exception ex, ref string error)
    {
        error += $"ExceptionMessage: '{ex.Message}'.";
        if (ex is Domain.BadStatusCodeException)
        {
            error += $"Status code: {((Domain.BadStatusCodeException)ex).StatusCode}";
        }

        if (ex.InnerException != null)
        {
            error += $"InnerEx: ";
            CombineErrorWithAllInnerExceptions(ex.InnerException, ref error);
        }
    }
}

然后将其用于方法：

    [NoAutomaticTrigger]
    [ErrorHandler]
    public async Task GetDriversAsync(TextWriter logger)
    {

发生异常时调用此代码并向我发送通知电子邮件

WebJob 和 ExceptionFilterAttribute

WebJob and ExceptionFilterAttribute

c#

attributes

exception-handling

exception

azure-webjobs