Take a look here: http://www.dofactory.com/Patterns/PatternFactory.aspx
Personally, this is one of the more useful design patterns out there, but I've seen it misused (I once saw a system that used a factory object to create... factory objects).
----- Original Message -----
From: "S. Isaac Dealey" <[EMAIL PROTECTED]>
Date: Thursday, February 26, 2004 1:30 pm
Subject: RE: What is a Factory?
> Heh... that sounds to me like the functionality described for
> "Manager" objects. Or at least without more information about a
> specific scenario, the way I think I'd be liable to design that sort
> of thing would place this functionality in a Manager rather than a
> Factory.
>
> Thanks Mosh
>
> > Isaac:
>
> > A lot of times, a Factory is used to not only create but
> > also to manage the
> > creation of objects. For example, in a situation where
> > you want to support
> > database connection pooling, you would use a Factory to
> > manage the creation
> > an/or reuse of connections.
>
> > --
> > Mosh Teitelbaum
> > evoch, LLC
> > Tel: (301) 942-5378
> > Fax: (301) 933-3651
> > Email: [EMAIL PROTECTED]
> > WWW: http://www.evoch.com/
>
> > -----Original Message-----
> > From: S. Isaac Dealey [EMAIL PROTECTED]
> > Sent: Thursday, February 26, 2004 3:00 PM
> > To: CF-Talk
> > Subject: Re: What is a Factory?
>
>
> > Boy that seems like a useless abstraction... The factory
> > that is ...
> > the Manager I understand, but it seems like if you wanted
> > a new
> > something to put into a manager, you'd just use "newThing
> > = new
> > Something(blah,blah)" instead of having a separate
> > "factory" object to
> > create them. Is there some other reason for it that I'm
> > not aware of?
>
> >> On Thu, 2004-02-26 at 11:17, Troy Simpson wrote:
> >>> All,
> >>>
> >>> I noticed that some application user the terms Factory
> >>> and Manager in
> >>> the Class/Object Names. Like AppFactory, AppManager,
> >>> and
> >>> EventManager
> >>> in Mach-II
> >>>
> >>> 1. What is the general definition of a Factory?
> >>> 2. What is the general definition of a Manager?
>
> >> In a very basic way (from a java stand point) a factory
> >> produces and a manager manages
>
> >> so you'd tend to see stuff like
>
> >> Thing thing = Factory.createInstance() not
> >> Manager.createInstance()
>
> >> Manager.add(thing)
> >> not Factory.add(thing)
>
> >> Pretty much just what you think it does :)
>
> >> --
> >> Rob <[EMAIL PROTECTED]>
>
> >>
>
>
>
> >
>
>
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