[noelwelsh]

0. Drop me an email (see profile) if you want to continue this conversation. My full response is too large for a textarea.

1. Not using Play, so that's moot.

2. The monad type is not an Option, it's more like Future[Either[Problem, Response]], Caches, for instance, return Futures.

3. That was the simplest for comp I could find. Most of them are much longer. You'd have to be batshit crazy to write nested flatMaps for them.