Plack::Middleware or Plugins?

[stevan]

Plack::Middleware executes (mostly) outside of an application, for some cases this will be fine for PONAPI, but not all of them. It might be worth looking into how we might create a plugin system specific to PONAPI (with API hook points, etc). Specifically things like user/session based rate-limiting, non-generic profiling/instrumentation, application specific load balancing, and probably a few other things I can't think of right now.

Probably best to find an actual use case and start from there, but I just wanted to make a note before this slipped my mind.