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Re^2: Best Practices for creating an OO version of an existing CPAN module?

by topher (Scribe)
on Feb 25, 2013 at 20:25 UTC ( #1020561=note: print w/ replies, xml ) Need Help??


in reply to Re: Best Practices for creating an OO version of an existing CPAN module?
in thread Best Practices for creating an OO version of an existing CPAN module?

This biggest issue comes from the use of package variables to maintain state. I have a need for the equivalent of multiple instances, and I'd rather not have to write wrapper code to continually update the package state variables every time I call a module function.

An OO interface where I could more cleanly have multiple instances, each with it's own object state, seems like the best solution.


Comment on Re^2: Best Practices for creating an OO version of an existing CPAN module?
Re^3: Best Practices for creating an OO version of an existing CPAN module?
by BrowserUk (Pope) on Feb 25, 2013 at 20:30 UTC
    This biggest issue comes from the use of package variables to maintain state.

    What module are we talking about here?


    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.

      I've been avoiding naming it because I'm really interested more in high level thoughts about process, procedure, and best practices around recreating an existing CPAN module with an OO interface, as opposed to the details of the module itself.

      I'd really like to hear more thoughts and recommendations on how to handle this in the general sense. Is it best to combine the procedural and OO interface into a single package? Or have them in separate packages? Why is one better? Or is there no real consensus on this, and no real advantage or disadvantage to either method?

      However, for the sake of completeness, the module is Net::Statsd. It uses a pair of package variables to set the destination host/port, and I have a need to for multiple separate destinations.

        the module is Net::Statsd. It uses a pair of package variables to set the destination host/port, and I have a need to for multiple separate destinations.

        For that particular module, I agree an OO interface would seem like the best way to go.

        As for how. The existing interface does not lend itself to being objectised without effectively re-writing the interface of every procedure. As such, I think you'd be better off using a completely separate package (say Net::Statsd::OO or similar) and just writing it from scratch. With reference to the existing; but without having it as a dependency.


        With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
        Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
        "Science is about questioning the status quo. Questioning authority".
        In the absence of evidence, opinion is indistinguishable from prejudice.
Re^3: Best Practices for creating an OO version of an existing CPAN module?
by blue_cowdawg (Monsignor) on Feb 25, 2013 at 20:51 UTC
        This biggest issue comes from the use of package variables to maintain state. I have a need for the equivalent of multiple instances, and I'd rather not have to write wrapper code to continually update the package state variables every time I call a module function.

    Eh? What package are we talking about here and what package variables?


    Peter L. Berghold -- Unix Professional
    Peter -at- Berghold -dot- Net; AOL IM redcowdawg Yahoo IM: blue_cowdawg

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