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Re: CGI::Application, inheritance trees, and 'the right way'

by FoxtrotUniform (Prior)
on Nov 01, 2004 at 22:44 UTC ( #404446=note: print w/ replies, xml ) Need Help??

in reply to CGI::Application, inheritance trees, and 'the right way'

It sounds like is a repository for utility code. If that's the case, then it shouldn't inherit from CGI::Application. Going by the names you have, it sounds like EventManager and EmailManager aren't really kinds of SiteManagers; maybe all three are Managers. Inheritance should model "is-a" — if the child class doesn't quite fit, don't force it. That way lies madness.

Don't inherit from a superclass just for code reuse: there are plenty of good ways to reuse code; inheritance is one, but building libraries with clean interfaces is perfectly good, too, and doesn't complicate your life with weird dispatch semantics. If you have to ask "Should foo really subclass bar?", the answer is probably no.

Yours in pedantry,
F o x t r o t U n i f o r m

"Anything you put in comments is not tested and easily goes out of date." -- tye

Comment on Re: CGI::Application, inheritance trees, and 'the right way'
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Re^2: CGI::Application, inheritance trees, and 'the right way'
by geektron (Curate) on Nov 02, 2004 at 07:23 UTC
    well, the big reason i have SiteManager as a parent class is because the authentication lives there, and it's really simple auth.

    other functions are utility functions.

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