Rather than having PageSingleton save it's data in application scope,
wouldn't it be better to have page singleton save it's data inside it,
and have page singleton itself in application scope?
so:
PageSingleton
=========
- Struct pages;
=========
+ init(String pageFilePath) : PageSingleton
+ getPage(String path): String
=========
getPage() would basically check if the page has been loaded into 'pages'
(structKeyExists), if so, return it, otherwise load it and return it.
Rob Munn wrote:
This looks like the Singleton pattern to me:
page =
CreateObject("component","prototype.entity.systemsforge.PageSingleton").Init("#ThisPageFilePath#");};
Inside the PageSingleton.cfc init() function you put the logic to
check whether the page exists in your application.page structure,
initialize it if it doesn't exist, and return it. That way the only
place you ever reference the application scope is in PageSingleton. I
can post a clearer code example tomorrow when my brain is less foggy,
but this is the method I learned from others here and it has worked
well for me.
-----Original Message-----
*From:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
*On Behalf Of *Peter Bell
*Sent:* Monday, February 27, 2006 7:58 PM
*To:* [email protected]
*Subject:* [CFCDev] Lazy Load - any patterns to encapsulate?
Hi There,
So, I have a page class that I lazy load to minimize initial
application load time for large sites. However, for performance
purposes, I store each page object once it has been created using
the application scope (I don't have so many instances of the page
class that this would be a problem in terms of memory and each one
is fairly small).
So, my calling code looked like this:
<cfscript>
// If the page doesn't exist in application scope, initialize it
(lazy load)
if(not isDefined("Application.page.#ThisPageFilePath#"))
{"Application.page.#ThisPageFilePath#" =
CreateObject("component","prototype.entity.systemsforge.Page").Init("#ThisPageFilePath#");};
</cfscript>
That looked plain wrong (seemed to be wrong for anything other
than a page something - e.g. a page service to be worrying about
whether or not a given page had been constructed or not), so I
created an Application.PageService, provided it with a
GetbyFilePath() method and put the above code in there.
Is this going in the right direction?
Best Wishes,
Peter
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--
Haikal Saadh, Applications Programmer
Teaching and Learning Support Services
K405, Queensland University of Technology, Kelvin Grove Campus
[EMAIL PROTECTED], 3864 8633
CRICOS No. 00213J
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