Consider extracting metrics collection

Hi! I’m currently working on an alternative node.js agent https://github.com/rmdm/elastic-opentracing (I’ve started it mostly because I need more control on when and what to initialize and instrument). I’m going to add metrics collection support to it and as official module has already implemented it, I’d like to avoid reinventing the wheel and somehow to reuse it if possible. I’m not sure on the way in which it should be done though, wheter it should go with elastic-apm-http-client or in its own module, if at all. So I’d like to hear you thoughts on that 😃

Btw, do you mind if I publish it under the elastic-opentracing name on npm?

[watson]

For reference, I’ve created two new issues to allow for this: #858 + #859

[rmdm]

Ok, Thank you for the discussion, I beleive I get even several options to go with. Closing this then.