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A
Anonymous
September 30, 2009
Question

Application.cfc Issues

  • September 30, 2009
  • 2 replies
  • 934 views

We are migrating a cf6 app to cf8 and I've run into an issue with the application.cfc. In my old application.cfm page the following code - in bold, creates a reference to an object, in the new cfc model this does not work.

old application.cfm page

<cffunction name="loadAppCFC" access="public" displayname="Load CFC module" hint="Load CFCs into the application scope">
    <cfargument name="ObjectName" REQUIRED="Yes" TYPE="variableName">
    <cfargument name="LocalName" type="variableName" default="#Arguments.ObjectName#">
    <cfargument name="Reload" type="string" default="n">

    <cfif Arguments.Reload eq "y" OR NOT IsDefined("Application.Obj.#Arguments.ObjectName#") OR ISDefined("Application.CFCReload.#Arguments.ObjectName#")>
        <CFTRACE text="Reloading cfc object #Arguments.ObjectName# - #ISDefined('Application.CFCReload.#Arguments.ObjectName#')#">
        <cflock timeout="5" throwontimeout="Yes" name="#Arguments.ObjectName#" type="EXCLUSIVE">
            <cfobject name="Application.Obj.#Arguments.LocalName#" component="\ECConfig\Components\Lib\#Arguments.ObjectName#">
            <CFIF IsDefined("Application.CFCReload")>
        <cfset StructDelete(Application.CFCReload, Arguments.ObjectName, "True")>
            </CFIF>
        </cflock>
    </cfif>
     <cfset Variables[Arguments.LocalName] = evaluate("Application.Obj.#Arguments.LocalName#")>
</cffunction>

new application.cfc page

<cfcomponent>
.
.function above is defined here
.
<cffunction name="onApplicationStart" returntype="boolean">
.
.
<cfset loadAppCFC("comUDF", "comUDF", Application.ini.debug.ReloadObjects)>
.
.
<cfreturn true/>
</cffunction>
</cfcomponent>


Using the old application page we can reference the object as comUDF.methodName, using the new application page this does not work and I have to instead use Application.Obj.comUDF.methodName. I am trying to avoid this as we have a very large number of pages that use these calls. If anyone can point out how I can create a reference to this object it would be greatly appreciated.

    This topic has been closed for replies.

    2 replies

    BKBK
    Community Expert
    BKBKCommunity Expert
    Community Expert
    October 1, 2009

    I would first try simpler expressions like

    <cfset Variables[Arguments.LocalName] = application.Obj[Arguments.LocalName]>
    <cfset Variables.comUDF = Application.Obj.comUDF>

    ilssac
    ilssac
    Inspiring
    September 30, 2009

    For the variable scope issue, it is a matter of putting it in the proper place.

    OnApplicationStart(): you can define "applicaiton" scope variables

    OnSessionStart(): You can define "session" scope variables.

    OnRequestStart(): You can define "request" scope variables AND "varaiables" scope variables if you also include on OnRequest method.

    OnRequest(): You can define"variables" scope variables or allow for them to be defiend on the OnRequestStart() method.

    On note is using the OnRequest() method can have impoprtant consequences to CFML pages intended to be used as web services or for remote AJAX and or Flex AMF requests.

    A
    Anonymous
    September 30, 2009

    Okay I tried setting this variable in the onRequest scope, but it does not work. When I hit my breakpoint in my application and look at the Variables scope the variable comUDF does not exist, it should be a reference to the Application.Obj.comUDF component.

    Can I use evaluate inside the onRequest scope?

    <cfset Variables["comUDF"] = evaluate("Application.Obj.comUDF")>

    A
    Adam Cameron.
    Inspiring
    October 1, 2009

    Okay I tried setting this variable in the onRequest scope, but it does not work. When I hit my breakpoint in my application and look at the Variables scope the variable comUDF does not exist, it should be a reference to the Application.Obj.comUDF component.

    Can I use evaluate inside the onRequest scope?

    <cfset Variables["comUDF"] = evaluate("Application.Obj.comUDF")>

    You can, but why would you want to in this case?

    One can also certainly set variables-scoped variables in onRequest() and they are available to the template onRequest() includes.

    Here's a brief proof of concept:

    <!--- Application.cfc --->

    <cfcomponent output="false">
       
        <cfset this.name = "app1">


        <cffunction name="onRequest" returnType="void">
            <cfargument name="thePage" type="string" required="true">
           
            <cfset variables.foo = "bar">
           
            <cfinclude template="#arguments.thePage#">
        </cffunction>


    </cfcomponent>


    <!--- dump.cfm --->

    <cfdump var="#variables#">

    Stick those in the same dir, and browse to dump.cfm.  You'll see foo in the variables scope.

    So I'm not sure why you're having problems.  Post your code.

    --

    Adam

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