Robert,
You can create a struct in the Server (or Application) scope that holds a
reference to each instantiated object. Lets call this this
"Server.stObjects".
Each object needs a unique ID, so a UUID will be perfect. Add a property
called "ObjectID" in each component that you want to put inside this global
reference struct. When an object is instantiated, simply set the ObjectID
property to a newly generated UUID. Next, create a key in the global struct
with its name set to the object's ObjectID and its value set to a reference
to the new object. You can put all this in the constructor code. Here is
the code:
--------------------------------------------------------
in Application.cfm:
<cfparam name="Server.stObjects" type="struct" default="#StructNew()#"/>
--------------------------------------------------------
in component file:
<cfcomponent>
<cfproperty name="ObjectID" type="UUID"/>
...
<cfif NOT Len(this.ObjectID)>
<cfset this.ObjectID = CreateUUID()>
<cfset Server.stObjects[this.ObjectID] = this>
</cfif>
</cfcomponent>
--------------------------------------------------------
To get the object back, simply use its ObjectID to access the key in the
global struct.
You might want to put this code into a base class so that you don't have to
copy it all over the place. In that class you could add the private methods
"addRef", "removeRef" and "getRef", placing the constructor code above in
the "addRef" method.
"removeRef" would simply remove the object's key from the global struct.
"getRef" would return a reference to the object with the specified ObjectID
value.
--------------------------------------------------------
I hope this sheds some light on the possible solutions to your problem.
Paul Kenney
[EMAIL PROTECTED]
> -----Original Message-----
> From: Robert Polickoski [mailto:[EMAIL PROTECTED]]
> Sent: Monday, December 16, 2002 1:35 PM
> To: CF-Talk
> Subject: CFC Instance Identification
>
>
> All,
>
> Thank you in advance for you patience with my CFC tribulations. I
> am trying to find a string identifier for an instance of a CFC.
>
> The situation is this: I am outputting a list of instantiated
> objects to which a user has access. In this list, I want to put
> anchors that will call a specific method of an instantiated
> object. I have a function in a non-instantiated CFC that can do
> this as long as I can pass a string identifier for the instance.
>
> <cffunction name="DisplayCompMeth" access="remote"
> output="true" displayname="Display Component Method" hint="Display
> a specific method of a specific componentinstance">
> <!-- This function displays the specified method
> of the specified component instance -->
> <cfargument name="Comp" type="string"
> required="true" default="#URL.Comp#" displayname="Component"
> hint="The component or instance thereof">
> <cfargument name="Meth" type="string"
> required="true" default="#URL.Meth#" displayname="Method"
> hint="The method to be invoked">
> <cfinvoke component="#evaluate("#Comp#")#"
> method="#Meth#" returnvariable="DisplayPage"></cfinvoke>
> <cfoutput>
> #DisplayPage#
> </cfoutput>
> </cffunction>
>
> This works fine when I know the name of the instance such as
> SESSION.User. But I am actually creating the menu by calling
> methods from within the instantiated objects. So I am looking for
> a system level string identifier, like CFID, that is accessible
> from within the instantiated object. Does anyone know if there is
> such a thing and if so, how to get it?
>
> Again, thank you for your patience, assistance and support.
>
> Robert J. Polickoski
> Senior Programmer, ISRD Inc.
> (540) 842-6339
> [EMAIL PROTECTED]
> AIM - RobertJFP
>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4
Subscription:
http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribe&forumid=4
FAQ: http://www.thenetprofits.co.uk/coldfusion/faq
This list and all House of Fusion resources hosted by CFHosting.com. The place for
dependable ColdFusion Hosting.
