[Koha-bugs] [Bug 15562] Make Koha more suitable for shared hosting with plack

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=15562

--- Comment #4 from Srdjan Jankovic <srdjan at catalyst.net.nz> ---
There's a serious problem with Koha - it is CGI-centric. So all that singleton
badness (as in context, database connection, cache) is to make global vars and 
optimise performance of the existing code under CGI conditions.  I think better
idea would be an app container, and develop with that in mind, rather then
improving existing code base performance and then doing triple somersaults to
get it going in modern setups. Even Koha:: namespace is very in line with the
one CGI process paradigm.

This is an attempt to control the damage while we decide how to move on. The
idea is to enable context-less module load, and improve on clunky set_context
-> restore context mechanism. I have tried many pages with caching situation,
and it seems to work in both old CGI and new plack setup. But I did not go to
every corner.

I strongly suggest we start moving towards Koha::App container (a persistant
glorified context without singletons).

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