[Cppcms-users] Purpose of session

[Lederhilger M. <M.L...@ds...>]

Hello,

I have a few questions regarding the purpose of session. First of all I
understand it's main purpose, which is distinguishing connections from
different users (= sessions). But apart from that, is it only used to
store some global and not often changing information like user id, csrf
token and alike, which is useful for all applications in an application
hierarchy? I would need to store some state per application in the
hierarchy per session. I think it is not good to store that in the
session itself - need for serialization / deserialization, changes to
the session can be lost if requests from the same session are handled in
parallel (if a second request which is changing the session is handled
in the time between load and save of the session of the first request).
Is it better to store the application state elsewhere? Is it possible to
get notified, if CppCMS garbage collects sessions, so that the
additional application state can be cleaned up too?

Thank you for your answers,

Martin Lederhilger