Ahhhh, but not if he's sticking a query in there, or he doesn't want a default value :O)
-----Original Message----- From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]] Sent: 25 September 2002 23:27 To: CF-Talk Subject: RE: Best coding techniques for use of Application variables Or something like this should work also: <cflock scope="application" timeout="10" type="exclusive"> <cfparam name="application.myvar" type="string" default="hellacool"> </cflock> You can even drop the cflock if you're on CFMX. Isaac Certified Advanced ColdFusion 5 Developer www.turnkey.to 954-776-0046 > Long email :O) > To answer one point, if you want to set an APPLICATION var > only if it > doesn't exist, do it in the Application.cfm file. Wrap it > in an if statement > ... > <cfif NOT IsDefined("APPLICATION.myVar")> > <cfset APPLICATION.whatever = "hellacool"> > </cfif> > Ade > -----Original Message----- > From: Jay Packer [mailto:[EMAIL PROTECTED]] > Sent: 25 September 2002 22:40 > To: CF-Talk > Subject: Best coding techniques for use of Application > variables > Hi, > I have some questions regarding the use of application > variables that I > was hoping for some suggestions on. > First is the issue of locking. If I understand correctly, > I'll gain a > small performance boost if I do my own locking instead of > allowing CF to > automatically lock all READS via the CF administrator. > Secondly, when > doing my own locking, what the best way to use variables > on the page? > Instead of putting locks around chunks of code where > application (or > session) variables would be used, I've been reading my > variables into > the local scope at the top of my templates where they're > needed, like > this: > <cflock> > <cfset variables.x = application.x> > </cflock> > By reading the variables into the local scope, I can use > any app/session > variables without having to worry about where I'm placing > my locks later > on down in my code. I just wondered if this was a > good/appropriate > coding technique or if I should be doing something else. > Also, what's the best way to initialize application > variables? If I've > got a list of application variables, some coming from > database values, > it seems inefficient to run a query and set the variables > on the > Application.cfm page because every time a user requests a > page, this > code will get run again. It seems far better to detect if > my application > variables have already been initialized and if not, then > use cfinclude > to call a template where the query gets run and the > variables get set. I > could do this by having a variable called > application.isInitialized. It > gets set at the end of the page where all my application > variables are > set, and if it is defined, then I don't need to > re-initialize my > application variables. > Here's a really important question: In the above case, > will all the > other application variables exist if > application.isInitialized is > defined? (I'm setting them all at the same time on the > same template). > To word the question another way, how can I be sure that > all my > application variables exist so that I don't have to > "re-set" them every > time Application.cfm runs. > A college student, I've been coding in CF for about four > years now. > Although I think the language is powerful, flexible, and > intuitive, at > times I find its documentation and/or examples to be > serverly lacking. > Time and time again, I've seen example code from Allaire > (formerly) and > now Macromedia that uses application/session variables > without locking > them at all. You would think that issues I've just asked > about would > have been clearly explained in the documentation, but > they're not. When > people have instability with CF, the number one culprit is > improper > locking. I think the reason that this is so is due to a > lack of good > examples on how to use the cflock tag. Sorry to rant as > I'm no doubt > preaching to the choir. > Thanks in advance for any help! ______________________________________________________________________ Signup for the Fusion Authority news alert and keep up with the latest news in ColdFusion and related topics. http://www.fusionauthority.com/signup.cfm FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
