CODEWITHSUNDEEP
c#azureazure-application-insights
Isaac Levin
Isaac Levin

Reputation: 2899

Setting custom username to Initializer Application Insights

I am looking to add a logged-in user's name to Application Insights to replace the cookie by default. I found this post that does something like this

public class RealUserIDTelemetryInitializer:ITelemetryInitializer
{
     public void Initialize(Microsoft.ApplicationInsights.Channel.ITelemetry telemetry)
       {
       // Replace this with your custom logic
       if (DateTime.Now.Ticks % 2 > 0)
       {
            telemetry.Context.User.Id = "Ron Weasley";
       }
       else
       {
            telemetry.Context.User.Id = "Hermione Granger";
       }
     }
}

My question, is how do I pass data into this? I have a login method on my Api that returns some info, but calling into this Initializer is something I am confused on.

Upvotes: 2

Views: 862

Answers (1)

Peter Bons
Peter Bons

Reputation: 29711

We once had that same issue, although not for a user id but for an operation id. But the same principle can be applied here. We used a Func<T> that provides the data for the initializer (See full code of the initializerhere and the usage here). 

public class RealUserIDTelemetryInitializer:ITelemetryInitializer
{
     private readonly Func<string> usernameProvider; 

     public RealUserIDTelemetryInitializer(Func<string> usernameProvider)
     {
         this.usernameProvider = usernameProvider;
     }
     public void Initialize(Microsoft.ApplicationInsights.Channel.ITelemetry telemetry)
     {
           telemetry.Context.User.Id = usernameProvider.Invoke();
     }
}

Then add the initializer using code:

configuration.TelemetryInitializers.Add(new RealUserIDTelemetryInitializer(() =>
            CallContext.LogicalGetData(UserId)?.ToString()));

As you can see in our case the data was provided using data on the current thread but in your case I suppose there is easier access to the username so you wil probably inject another Func.

Upvotes: 1

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