Make the session interface asynchronous.

[niwinz]

The current implementation mimics the ring session middleware, that does not fits very well in nodejs environent. A great exampe can be, how I can implement a session store that uses redis. Many redis clients in node are asynchronous...

The session stores should be rethought and new, asynchronous interface should be defined in my opinion.

Ideas? Thoughts?

[niwinz]

I have done something similar to this on catacumba, that can be used as start point maybe: https://github.com/funcool/catacumba/blob/master/src/clojure/catacumba/handlers/session.clj

[adamkl]

I'd like to take a crack at this. I have a need to use redis as a session store, so I'd need an async interface.

@yogthos Any preferences on how I would extend the SessionStore protocol? Simply overload the existing methods to accept a callback? Then people can use promises/core.async as they see fit?

[yogthos]

Yeah that sounds reasonable to me, and thanks for taking a look.