What does this solution do OpenTelemetry.AutoInstrumentation.Native?

[varkey98]

I want to undestand how we get the loggingbuilder here: https://github.com/open-telemetry/opentelemetry-dotnet-instrumentation/blob/main/src/OpenTelemetry.AutoInstrumentation/Instrumentations/Logger/LoggingBuilderIntegration.cs? Can I generalise this and implement a similar class for getting WebApplicationBuilder whenever it gets called?

[Kielek]

I think that you should start with reading this document https://github.com/open-telemetry/opentelemetry-dotnet-instrumentation/blob/main/docs/design.md#bytecode-instrumentation

Especially "Bytecode instrumentation" section.

What is your use case? What do you want to do with WebApplicationBuilder?

[varkey98]

Thanks, just figured that out. What I want to do is to add a middleware to an asp net app. I think that I can do this with a hosting startup assembly, but wanted to understand if this was an option as well

[varkey98]

@Kielek do you think what I'm trying to do is possible?

[Kielek]

Sorry. I do not understand the use case. Could you please be more descriptive?

In general with monkey-patching aka bytecode changes you can do anything with the code, but is it not for free. If possible you should avoid it as it reduce performance/optimisations.

[varkey98]

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

@Kielek If I have an app which is being built like this, I'd like to get this builder instance and do something builder.Services.Add before builder.build() gets called.