Topic on Talk:Requests for comment/SessionStorageAPI

It would be nice to include some information on how the API inside MediaWiki is going to look. The two obvious options are

1. add a new SessionService to the DI container with get/set/delete methods, have the default implementation fall back to the BagOStuff instance returned by ObjectCache::getInstance( $wgSessionCacheType ) and use $wgObjectCacheSessionExpiry for expiry, provide an alternative implementation that uses the new REST service (directly or via VirtualRESTService). This would require some (probably fairly trivial) refactoring in SessionManager/SessionBackend, CentralAuth and maybe OAuth.
2. add a new BagOStuff implementation that talks to the service. As mentioned elsewhere, that would require client-side TTL support and some sort of CAS or transaction handling (the latter is probably a good thing to have anyway). It would also prevent exposing any functionality that is not supported by BagOStuff, although the current service doesn't include such functionality anyway.