John, Thanks for your help. My only guess is I'm trying to formalize something I've been doing for years, creating a generic singleton management object. I don't know if that makes sense. If I haven't figured out what I'm doing with it soon, I'll probably start dropping code around the community to see if i'm completely backwards :)
-nathan http://www.dopefly.com/ On 10/27/05, John C. Bland II <[EMAIL PROTECTED]> wrote: > Hey Nathan, > > Singleton is a "single" instance class, cfc, etc. > > (you know I'm an AS man here) > > class blah{ > > public static var _instance:blah; > > function blah(){ > //add initialization of class or nothing here > } > > public static function getInstance(){ > if(_instance == undefined){ > _instance = new blah(); > } > return _instance; > } > } > > //utilization > import blah; > myOwnPersonalBlah = blah.getInstance (); > yourOwnPersonalBlah = blah.getInstance(); > > If you trace both of those you get the same instance. Singleton insures one > and only 1 instance of the "object" is created at any given time in the > application. > > Disclaimer: > I know this is a cf list but I'm faster with AS when it comes to OO. Also, I > wrote that on the fly so don't kick me if I'm off a bit. > > Hope that helps...back to reading I go. :-) > > --- > > John C. Bland II > > > On 10/27/05, Nathan Strutz <[EMAIL PROTECTED]> wrote: > > > > On 10/27/05, Mark Mandel <[EMAIL PROTECTED]> wrote: > > > If you are going to build an object that wraps application > > > variables... why not just store the variables inside the Object > > > itself, and just make it a singleton in the application scope and/or > > > pass it to all your other objects at startup? > > > > In order to reduce rudndant data in memory. Why should 1000 objects > > have a load of private vars, when they can all share a central object. > > Really not the largest concern in the universe, but i'm practicing in > > over-engineering ;) > > > > Of course I can't hard-code them, as things like the DSN will change > > from time to time, and I don't want to find all the CFCs that have the > > wrong one, this should be in a config file, loaded into an > > application-scoped settings object to make it as easy as possible. > > > > The singleton pattern... I'm confused a bit, haven't read that chapter > > yet. My understanding is that it's a manager for a collection of > > object instances, so if 2 people request the same object, different > > instance, it spits out 2 and may keep them in a pool. If 2 people > > request 1 object, it hands them both the same instance. Correct me > > where i'm wrong. > > > > If you like, we can go over the structure of dopefly.com, kinda what I > > have planned out, since that's basically what we're doing now anyway > > :) > > > > -nathan strutz > > http://www.dopefly.com/ > > > > > > > ---------------------------------------------------------- > > You are subscribed to cfcdev. To unsubscribe, send an email to > [email protected] with the words 'unsubscribe cfcdev' as the subject of the > email. > > > > CFCDev is run by CFCZone (www.cfczone.org) and supported by CFXHosting > (www.cfxhosting.com ). > > > > CFCDev is supported by New Atlanta, makers of BlueDragon > > http://www.newatlanta.com/products/bluedragon/index.cfm > > > > An archive of the CFCDev list is available at > www.mail-archive.com/[email protected] > > > > > > > > > > -- > John C. Bland II > ---------------------------------------------------------- > > You are subscribed to cfcdev. To unsubscribe, send an email to > [email protected] with the words 'unsubscribe cfcdev' as the subject of the > email. > > CFCDev is run by CFCZone (www.cfczone.org) and supported by CFXHosting > (www.cfxhosting.com). > > CFCDev is supported by New Atlanta, makers of BlueDragon > http://www.newatlanta.com/products/bluedragon/index.cfm > > An archive of the CFCDev list is available at > www.mail-archive.com/[email protected] ---------------------------------------------------------- You are subscribed to cfcdev. To unsubscribe, send an email to [email protected] with the words 'unsubscribe cfcdev' as the subject of the email. CFCDev is run by CFCZone (www.cfczone.org) and supported by CFXHosting (www.cfxhosting.com). CFCDev is supported by New Atlanta, makers of BlueDragon http://www.newatlanta.com/products/bluedragon/index.cfm An archive of the CFCDev list is available at www.mail-archive.com/[email protected]
