Support Blazor Server

[mattjohnsonpint]

Problem Statement

We should investigate better support for Blazor Server

Solution Brainstorm

Could include a new package, or might just need improved guidance docs.

Also related: #1685

[monderino]

Hi,

is there any progress on this topic?
Or maybe a best practice to implement a custom tracing?

I tried the following approach, but I'm not sure if this is correct.
Every Page I want to include inherits from this page.

public abstract partial class AbstractPage
{
    private ITransaction _transaction;
    private ISpan _span;
    private string _currentUri;

    public override Task SetParametersAsync(ParameterView parameters)
    {
        _currentUri = NavigationManager.Uri;
        Console.Write($@"SetParameters {_currentUri}");
        _transaction = SentrySdk.StartTransaction(
            NavigationManager.Uri, // name
            NavigationManager.Uri // operation
        );
        
        // Validate the cart
        _span = _transaction.StartChild(
            GetType().Name, // operation
            "init" // description
        );
        
        // Set transaction on scope to associate with errors and get included span instrumentation
        // If there's currently an unfinished transaction, it may be dropped
        SentrySdk.ConfigureScope(scope => scope.Transaction = _transaction);
        
        return base.SetParametersAsync(parameters);
    }

    protected override Task OnInitializedAsync()
    {
        Console.Write($@"OnInitialized {_currentUri}");
        return base.OnInitializedAsync();
    }
    
    protected override Task OnAfterRenderAsync(bool firstRender)
    {
        if(firstRender)
        {
            Console.Write($@"OnAfterRender first {_currentUri}");
            _span?.Finish();
            _transaction?.Finish();
        }
        else
        {
            Console.Write($@"OnAfterRender {_currentUri} ");
        }
        return base.OnAfterRenderAsync(firstRender);
    }
}