> -----Original Message-----
> From: David Brown [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, May 10, 2005 11:41 PM
> To: CF-Talk
> Subject: Server Scope
>
> A few questions:
>
> Is it good practice or wise to create an object in the server scope? And
> if so how long does it live? I see in the administrator Memory Variables
> you can set the application and Session time to live, but not server
> scope.
Generally it's only wise to use the server scope on servers (or instances)
you control completely - never trust it on shared servers. This doesn't
just mean hosting but also internal shared servers (consolidated corporate
application servers for example). It's just not worth it.
> What I want to do.
>
> <cfif (not structKeyExists(server, "MyPalAuth")) or
> isdefined("url.Flush")>
>
> <cflock name="Lock_MyPalAuth" timeout="5" type="EXCLUSIVE">
>
> <cfobject name="Server.MyPalAuth" component="mycoms.MyPalAuth">
>
> </cflock>
>
> </cfif>
Depending on the need for this you may not need the lock - or you may need a
better check.
Your first CFIF checks to see if something exists: but multiple requests may
hit that at the same time. This means that multiple templates will be
sitting on that lock - waiting for it to free up.
So if you start your server under load your <cfobject> call may occur
multiple times. To prevent this you'll need to do your check twice (but
only do the URL check the first time):
<cfif (not structKeyExists(server, "MyPalAuth")) or isdefined("url.Flush") >
<cflock name="Lock_MyPalAuth" timeout="5" type="EXCLUSIVE">
<cfif (not structKeyExists(server, "MyPalAuth"))>
<cfobject name="Server.MyPalAuth" component="mycoms.MyPalAuth">
</cfif>
</cflock>
</cfif>
> I read this from Ben's new Advanced Macromedia ColdFusion MX 7 Application
> Development book. But he used Application scope. I want the object to be
> created once on our intranet and then invoke it when needed in more then
> one application. I could place it in the application scope, but then that
> would mean for each application I would have to recreate the object.
It sound like a perfect use for the Server Scope.
Jim Davis
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