>>What exactly are you trying to accomplish?
> Thanks for your reply.
> I'm using CFDOCUMENT enclosed in an exclusive CFLOCK to
> create a _BIG_ PDF file in a shared server environment.
> Under typical server load it takes around 30 seconds or so
> to create the PDF. However, sometimes it can take much
> longer -- or forever (literally). To keep the user amused
> while they wait, they get to watch a progress bar thingy.
> A javascript redirects to an ERROR screen after 60
> seconds.
> While "USER A" is waiting for her PDF to be created I
> would like to prevent "USERS B,C,D..." from queing
> requests and display a "PLEASE WAIT" message or something.
> That's why I want to know when the CFLOCK is released.
Oh you mean "Please try again later"...
<cftry>
<cflock name="makepdf_wrapper">
<!--- this lock ensures single threading to the whole thing --->
<cflock name="makepdf" type="exclusive" timeout="1">
<!--- this lock checks to see if it's available --->
</cflock>
<cflock name="makepdf" type="exclusive" timeout="60">
... make the pdf ...
</cflock>
</cflock>
<cfcatch>
<!--- if it's not available the 2nd lock
will throw an error to this catch --->
Please try again later
</cfcatch>
</cftry>
This will pretty quickly throw the "please try again" up in front of
anyone who tries while someone else has the lock...
hth
s. isaac dealey 954.522.6080
new epoch : isn't it time for a change?
add features without fixtures with
the onTap open source framework
http://www.fusiontap.com
http://coldfusion.sys-con.com/author/4806Dealey.htm
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