View with rename function

[rytsh]

Problem Statement

When creating a new view, I really like to add prefix string to all my instruments or regex to change it. I am thinking to add my service name as prefix.

Now I can just rename directly but if something like give a function to rename, I can write my new names based on instrument name.

This can also break the safety check of the rename but it would be good this kind of wildcard rename.

Proposed Solution

This is just an example code of how to implement:

func WithRenameFunc(fn func(string) string) Option {
	return optionFunc(func(v View) View {
                v.renameFunc = fn
		return v
	})
}

// In TransformInstrument after the v.name check
if v.renameFunc != nil {
    inst.Name = v.renameFunc(inst.Name)
}

[Aneurysm9]

Thank you for your interest and suggestion. I believe that functionality like this would need to be vetted and defined in the OpenTelemetry specification before we could implement it here.