Best way to dynamically set host server in ColdFusion 10 - coldfusion

Question

I use the following to dynamically detect the host server. The importance for making it dynamic is that currently there are too many hard coded redirect such as:
http:s//mysite.com/hr/index.cfm
within my app.
When I'm moving from production site to development site and then back to production site, I have to manually change/comment out this http/https one by one and it is not only time consuming but also dangerous.
Here is the code I found that can detect the host server. Then I do the following:
<CFSET inet = CreateObject("java", "java.net.InetAddress")>
<CFSET inet = inet.getLocalHost()>
<CFSET HostServer = "#inet.getHostName()#">
<CFSET ThisHostServer = "#LEFT(HostServer,6)#">
<CFSWITCH expression="#Trim(ThisHostServer)#"><!--- Prod or Dev server --->
<CFCASE value="myprodsite.com">
<CFSET UseThisURL = "http://myprodsite.com">
</CFCASE>
<CFCASE value="mydevsite.com">
<CFSET UseThisURL = "http://myDevsite.com">
</CFCASE>
</CFSWITCH>
Then on each page where links or redirection exist, I just need to use:
#UseThisURL#/hr/index.cfm
My question is:
Where is the best way to set #UseThisURL# in the application?
I'm using ColdFusion 10 and Application.cfc in Linux env.
Should I set it as an application or a session scope?
Since everything will be in an application or session scope, when users are idle on a certain page and the application/session scope is expired, when user click on a link will it generate an error? How to prevent users from seeing error caused by using this technique? Please advice, thank you!

Answer 1

Best practice that I used is creating config.cfc which can contain function like getServerSpecificVariables() to return structure. this structure will be saved in your application scope since you don't want to create USEThisURL for every session start. When you need to reset simply clear your application scope. instantiate below config component inside onApplicationStart event in Application.cfc
Example
Config.cfc:
component{
public struct function getServerSpeceficVariables(){
var config = {};
var inet = CreateObject("java", "java.net.InetAddress");
inet = inet.getLocalHost();
HostServer = inet.getHostName();
ThisHostServer = LEFT(HostServer,6);
switch(Trim(ThisHostServer)){
case 'myprodsite.com':{
config.useThisURL = '';
break;
}
case 'mydevsite.com':{
config.useThisURL = '';
break;
}
}
return config;
}
}