Back in the day, (before CFMX) you had to lock all accesses to
application scope or risk crashing the server. So to cut down on the
number of locks you copied the stuff in application scope to request
scope at the beginning of each request. The code you have is just
someone bringing a familiar but no longer needed practice with them when
they they moved to mx. As of MX7 you would instantiate utilities like
this in the onApplication start method of Application.cfc and not need
the locks or the isDefineds.
J MacKay wrote:
Hopefully someone can answer two newbie questions ..
I've read a few blog entries about storing general utility components
in the application scope so they can accessed anywhere within the
application.
<cfif NOT isDefined("application.Utilities")>
<cflock scope="application" type="exclusive" timeout="10">
<cfif NOT isDefined("application.Utilities")>
<cfset application.Utilities = createObject("component",
"Utilities")>
</cfif>
</cflock>
</cfif>
<cflock ...>
<cfset Request.Utilities = application.Utilities>
</cflock>
It makes sense to instantiate the component once and store it in the
application scope, but 1) why copy it back into the Request scope ? So
it will be available to custom tags? 2) Why is it necessary to use a
lock when copying the component into the request scope?
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