Moving to CF10, Need help with Application.cfc

I've been googling about how to work with Application.cfc since last week but I still have some questions and I can't find the answers.

My application is under the root (in unix) and there are many subfolders underneath it. Each sub-folder is hosting a different web application.

From what I read, I can create 1 root Application.cfc and then on subsequent sub-folder, when I need to have another Application.cfc on that level, I can create ProxyApplication (see below) and then create a sub-folder level Applicatin.cfc

So, when I set an application.DSN on my root Application.cfc, using proxyApplication I don't have to reset this dsn again in my sub folder level Application.cfc

Since my loginform.cfm and loginaction.cfm is right under root directory too,  I also set OnsessionStart in the root Application.cfc to handle user login. Then this means, I don't have to reset session variable again anywhere because session.username, etc has been set on the highest level.

Is this correct?

In addition, Am I correct when I do the following:

1. Since I have root level and sub-folder level Application.cfc, I should set this.name with a different name, am I right?

    On the root Application.cfc I set this.name = "StudentServices" because this represent the global application

    On the sub-folder level's Application.cfc, I set this.name to "StudentServices_stdLoad" becaus this sub-folder only handle student load application.

2. On the root Application.cfc, I set the DSN to the application scope. So on the sub-folder level Application.cfc I can check if a particular db is working or not

    because as awhole, in the global sense, this web application uses more than one Databases. Each sub-folder may use a database that is dfferent than the other sub folder.

Am I doing the right thing? Please advice

Below is example of what I have, Thank you!

I created a root Application.cfc under the root directory: 

<CFCOMPONENT displayname="Application" output="true" hint="My Root Application component">

   <!--- Set up the application --->

   <cfset application.MainDSN = "DSN1">

   <cfset application.ReportDSN = "DSN2">

   <cfreturn true/>

</cffunction>





</CFCOMPONENT>





Then, in this root directory I also created a ProxyApplication:



</cfcomponent>



Then in the Sub-Directory, I can create a sub-folder level Application.cfc extending the root Application.cfc:



    <!--- Set up the sub-folder application --->

    <cfset THIS.Name = "StudentServices_stdLoad"/>

    <cfset THIS.ApplicationTimeout = CreateTimeSpan(0,0,30,0) />

    <cfset THIS.SessionManagement = true/>

    <cfset THIS.SetClientCookies = false/>

    <cffunction name="OnApplicationStart" access="public" returntype="boolean" output="false">

       <!--- ****** Testing whether the ADVUPGRD is accessible by selecting some data.****** --->

       <cftry>

       <cfquery name="TestMain_DSN" datasource="#application.MainDSN#" maxrows="2">

         SELECT Count(*)

       </

cfquery>

         <!--- If we get a database error, report an error to the user, log the error information, and do not start the application. --->

        <cfcatch type="database">

          <cflog file="#this.name#" type="error" text="Main DSN is not available. message: #cfcatch.message# Detail: #cfcatch.detail# Native Error: #cfcatch.NativeErrorCode#" >

         <cfthrow message="This application encountered an error when connecting to the Main Database. Please contact support." />

         <cfreturn false>

       </cfcatch>

     </cftry>

     <cflog file="#this.name#" type="Information" text="Application #this.name# Started">

     <cfreturn true/>



   </cffunction>



</CFCOMPONENT>









</cffunction>

<cffunction name="OnSessionStart" access="public" returntype="void" output="false">

  <CFSET session.UserGroup = ""/>

  <CFSET session.UserName = ""/>

  <CFSET session.currentPage = ""/>

  <CFSET session.loggedin = "No"/>

  <CFSET session.userrights = ""/>

  <cfreturn/>

</cffunction>