■Application.cfc
<cfcomponent output="false"><cfprocessingdirective pageencoding="UTF-8" /><cfsetting enablecfoutputonly="yes">
	<cfcontent type="text/html; charset=UTF-8">
	<cfscript>
		setencoding("URL", "UTF-8");
		setencoding("FORM", "UTF-8");
	</cfscript>

	<cfset this.name = "sessionTest">
	
	<cfset This.sessionmanagement = true>
	<cfset This.clientmanagement = false>
	<cfset This.setclientcookies = true>
	<cfset This.setdomaincookies = false>
	<cfset This.sessiontimeout="#createtimespan(0, 0, 5, 0)#">

	<cffunction name="onApplicationStart"> 
		<cfset Application.sessions = 0> 
	</cffunction>

	<cffunction name="onSessionStart"> 
	    <cfscript> 
	        Session.started = now(); 
	    </cfscript> 

        <cflock scope="Application" timeout="5" type="Exclusive"> 
            <cfset Application.sessions = Application.sessions + 1> 
	    </cflock> 

	    <cflog file="#This.Name#" type="Information"  
	        text="SessionStart #Session.sessionid# started. start: #Session.started# Active sessions: #Application.sessions#">
	</cffunction>

	<cffunction name="onSessionEnd"> 
	    <cfargument name = "SessionScope" required=true/> 
	    <cfargument name = "AppScope" required=true/> 

	    <cfset var sessionLength = TimeFormat(Now() - SessionScope.started, "H:mm:ss")> 

	    <cflock name="AppLock" timeout="5" type="Exclusive"> 
	        <cfset Arguments.AppScope.sessions = Arguments.AppScope.sessions - 1> 
	    </cflock> 

	    <cflog file="#This.Name#" type="Information"  
	        text="Session #Arguments.SessionScope.sessionid# ended. Length: #sessionLength# Active sessions: #Arguments.AppScope.sessions#">
	</cffunction>

</cfcomponent>