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Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?]
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Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?]


  • Subject: Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?]
  • From: Chuck Hill <email@hidden>
  • Date: Fri, 4 Dec 2009 09:52:55 -0800


On Dec 4, 2009, at 6:27 AM, Kieran Kelleher wrote:

I don't use EOModel inheritance any more. It is a PITA. Not worth the hassle.

I've never found that to be the case. What trouble were you having?

Chuck


Using Strategy design pattern to composite in different behaviours works better for me. Remember the OO Principle "Favor composition over inheritance"

That is "Favor" not "use even when inheritance is appropriate".


Chuck



... I now favor composition over inheritance ;-) BTW, for this setup the table is identical to a single-table inheritance table, except that the 'type' id field determines the lazily constructed strategy behaviour class for the EO. I will only ever use EOModel inheritance again, if (1) I am told to by a customer, or (2) Strategy design pattern behaviour composition simply does not make sense (so far it makes sense for every case I have looked at in last few years) YMMV ;-)

Regards, Kieran

On Dec 4, 2009, at 8:49 AM, David Avendasora wrote:

Or you can just not use Vertical Inheritance. :-)

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References: 
 >Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Kieran Kelleher <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Anjo Krank <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Miguel Arroz <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Anjo Krank <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Miguel Arroz <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Anjo Krank <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Miguel Arroz <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Kieran Kelleher <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Kieran Kelleher <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Miguel Arroz <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Kieran Kelleher <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Chuck Hill <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Kieran Kelleher <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Lachlan Deck <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Chuck Hill <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Kieran Kelleher <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Ramsey Lee Gurley <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: David Avendasora <email@hidden>)
 >Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?] (From: Kieran Kelleher <email@hidden>)

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