Allow option to disable resource.name 404 rewriting

The datadog documention recommends to reduce the cardinality of the resource.name, and most of the instrumentation is cognizant of this. What’s the scenario where the Status404Decorator is useful?

The decorator here rewrites 404 responses with a custom resource.name. This was very confusing for me because I was expecting to look at the ratio of 404s to non-404s for my resource.

Can we add an option to turn this decorator off? I would like to have the ability to see my 404 responses with their original resource.name.

[rymndhng]

The cirumstance where the 404s are not useful to be grouped together is because applications may implement generic routes with a different permission scheme. i.e. if I am seeing a huge number of 404s on the url pattern /foo/:id/bar/:id, I want to see the spans with 404s grouped under the same resource name /foo/:id/bar/:id instead of a catch-all 404.

[randomanderson]

Resolved with #1152