Application Insights Telemetry filtering is not working

问题

I have already followed the guide here. I have tried both the config and "in code" approach of initializing and registering our telemetry processor. My goal is to filter out some HTTP responses so that those don't make their way to the sampled data. I haven't had any success. While our processor is initialized on app start, the Process method is never hit. Also, I already made sure that there is an InstrumentationKey in the config and that I'm using the correct key. What else am I missing?

This is what I have:

public class MyTelemetryProcessor : ITelemetryProcessor
{
    private ITelemetryProcessor Next { get; set; }

    // You can pass values from .config
    public string MyParamFromConfigFile { get; set; }

    // Link processors to each other in a chain.
    public MyTelemetryProcessor(ITelemetryProcessor next)
    {
        this.Next = next; <-- this is always hit indicating this processor is active
    }

    public void Process(ITelemetry item)
    {
        // To filter out an item, just return
        if (!OKtoSend(item)) { return; } <-- breakpoint here is never hit
        // Modify the item if required
        ModifyItem(item);

        this.Next.Process(item);
    }

    private bool OKtoSend(ITelemetry item) <-- and consequently this method is never hit
    {
        var request = item as RequestTelemetry; <-- breakpoint here is never hit

        // some more code goes here

        return request.Success.GetValueOrDefault(false);
    }

    // Example: replace with your own modifiers.
    private void ModifyItem(ITelemetry item)
    {
        item.Context.Properties.Add("app-version", "1." + MyParamFromConfigFile);
    }
}

And this is how it is registered. I can see this being hit during debugging when the app starts up:

var builder = TelemetryConfiguration.Active.TelemetryProcessorChainBuilder;
builder.Use((next) => new MyTelemetryProcessor (next));

builder.Build();

回答1:

In aspnetcore, my solution was to use : services.AddApplicationInsightsTelemetryProcessor(typeof(BasicTelemetryFilter));

(using the regular CreateWebHostBuilder :

WebHost.CreateDefaultBuilder(args)
            .UseApplicationInsights()
            .UseStartup<Startup>();

)

来源：https://stackoverflow.com/questions/50369709/application-insights-telemetry-filtering-is-not-working

标签

azure-application-insights