Adobe 38043740 - ColdFusion Standard - Mac Development Manual page 255

DEVELOPING COLDFUSION 9 APPLICATIONS
Developing CFML Applications
<cfcomponent>
<cfset This.name = "TestApplication">
<cfset This.Sessionmanagement=true>
<cfset This.Sessiontimeout="#createtimespan(0,0,10,0)#">
<cfset This.applicationtimeout="#createtimespan(5,0,0,0)#">
<cffunction name="onApplicationStart">
<cftry>
<!--- Test whether the DB that this application uses is accessible
by selecting some data. --->
<cfquery name="testDB" dataSource="cfdocexamples" maxrows="2">
SELECT Emp_ID FROM employee
</cfquery>
<!--- If we get database error, report it to the user, log the error
information, and do not start the application. --->
<cfcatch type="database">
<cfoutput>
This application encountered an error.<br>
Please contact support.
</cfoutput>
<cflog file="#This.Name#" type="error"
text="cfdocexamples DB not available. message: #cfcatch.message#
Detail: #cfcatch.detail# Native Error: #cfcatch.NativeErrorCode#">
<cfreturn False>
</cfcatch>
</cftry>
<cflog file="#This.Name#" type="Information" text="Application Started">
<!--- You do not have to lock code in the onApplicationStart method that sets Application
scope variables. --->
<cfscript>
Application.availableResources=0;
Application.counter1=1;
Application.sessions=0;
</cfscript>
<!--- You do not need to return True if you don't set the cffunction returntype attribute.
--->
</cffunction>
<cffunction name="onApplicationEnd">
<cfargument name="ApplicationScope" required=true/>
<cflog file="#This.Name#" type="Information"
text="Application #ApplicationScope.applicationname# Ended">
</cffunction>
<cffunction name="onRequestStart">
<!--- Authentication code, generated by the Dreamweaver Login Wizard,
makes sure that a user is logged in, and if not displays a login page. --->
<cfinclude template="mm_wizard_application_include.cfm">
<!--- If it's time for maintenance, tell users to come back later. --->
<cfscript>
if ((Hour(now()) gt 1) and (Hour(now()) lt 3)) {
WriteOutput("The system is undergoing periodic maintenance.
Please return after 3:00 AM Eastern time.");
return false;
} else {
this.start=now();
Last updated 1/20/2012
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