Re: application variables and a clustered enviroment
You'll need a webservice or another remote method of supplying the data to the other server. -- WSS4CF - WS-Security framework for CF http://wss4cf.riaforge.org/ On 9 August 2010 22:08, Chad McCue ch...@icsciences.com wrote: My company has two servers each having enterprise level coldfusion administrator installed on it. My site has code that will handle various counters based on user activity via application variables, I will have a main admin login that will be able to process these application variables and view hit counters. My question is if my admin is logged in on server 1, how can I access the numbers saved in the application variables by users that are on server 2 to combine with the numbers from application variables on server 1? Is it possible to use server variables with the ability to reference them from either server based on the servers IP? I am trying to do this without having to save the information in a DB table so I don't have to handle adding and removing based on session timeout issues, this data has to be as real time as possible. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology-Michael-Dinowitz/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:336119 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
RE: application variables
Try changing the name of your App. It's most likely caching the application variables as set up in the initial load of your app.cfm file. I've had that happen to me before and changing the app name did it for me. !//-- andy matthews web developer certified advanced coldfusion programmer ICGLink, Inc. [EMAIL PROTECTED] 615.370.1530 x737 --//- -Original Message- From: Daniel Kessler [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 14, 2006 12:54 PM To: CF-Talk Subject: application variables I'm doing something obviously wrong but can't seem to see it. In my Application.cfm, I declare a variable and in a page, I use it. But it's not showing up. The page at first displayed the information, but it's not doing so now. I have a cfapplication tag in the Application file and it had a sessiontimeout, and when I removed the timeout, I stopped getting the var. Putting it back in didn't seem to help. BTW, I am putting this in the request scope and I was told to do that years ago, but I never knew why and just do it cause I was told. What is the request scope? Here's my code. Application.cfm cfapplication sessionmanagement=yes setclientcookies=yes name=career_expo clientmanagement=Yes sessiontimeout=#CreateTimeSpan(0,1,0,0)# cfif NOT structKeyExists(session,'user') cfset session.user = duplicate(variables.foo) /cfif cfset request.the_year = '2006' cfset request.the_date = 'May 4' Page Code: span class=heading2#request.the_date#, 2006br 10 am - 1 pmbr/span I'm just trying to put the information that I have displayed in several places into one place to make it easy to change. thanks. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243527 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: application variables
Have you tried putting [] around the value... It might be there, just empty?? ... Ben Nadel Web Developer Nylon Technology 350 7th Avenue Floor 10 New York, NY 10001 212.691.1134 x 14 212.691.3477 fax www.nylontechnology.com Some people call me the space cowboy. Some people call me the gangster of love. -Original Message- From: Daniel Kessler [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 14, 2006 1:54 PM To: CF-Talk Subject: application variables I'm doing something obviously wrong but can't seem to see it. In my Application.cfm, I declare a variable and in a page, I use it. But it's not showing up. The page at first displayed the information, but it's not doing so now. I have a cfapplication tag in the Application file and it had a sessiontimeout, and when I removed the timeout, I stopped getting the var. Putting it back in didn't seem to help. BTW, I am putting this in the request scope and I was told to do that years ago, but I never knew why and just do it cause I was told. What is the request scope? Here's my code. Application.cfm cfapplication sessionmanagement=yes setclientcookies=yes name=career_expo clientmanagement=Yes sessiontimeout=#CreateTimeSpan(0,1,0,0)# cfif NOT structKeyExists(session,'user') cfset session.user = duplicate(variables.foo) /cfif cfset request.the_year = '2006' cfset request.the_date = 'May 4' Page Code: span class=heading2#request.the_date#, 2006br 10 am - 1 pmbr/span I'm just trying to put the information that I have displayed in several places into one place to make it easy to change. thanks. _ Daniel Kessler College of Health and Human Performance University of Maryland Suite 2387 Valley Drive College Park, MD 20742-2611 Phone: 301-405-2545 http://hhp.umd.edu ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243528 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
I tried that and I had the same response. I know the variable has info, cause I set it in the application.cfm and it's only set there. As I understand it, that runs first before the page. Have you tried putting [] around the value... It might be there, just empty?? ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243532 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
Try changing the name of your App. It's most likely caching the application variables as set up in the initial load of your app.cfm file. I've had that happen to me before and changing the app name did it for me. I tried changing the app name and I still had the same response. Restarting the browser didn't help. I then launched a different browser and it also displayed the information correctly before I clicked refresh and then it gave me the same error. sigh ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243535 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
Have you used cfsilent /, cfcontent / or cfsetting enablecfoutputonly=true / perhaps? Did you use cfoutput / .. ? What *does* it show? Nothing it all, or just not the contents of the variable? Rens daniel kessler wrote: Try changing the name of your App. It's most likely caching the application variables as set up in the initial load of your app.cfm file. I've had that happen to me before and changing the app name did it for me. I tried changing the app name and I still had the same response. Restarting the browser didn't help. I then launched a different browser and it also displayed the information correctly before I clicked refresh and then it gave me the same error. sigh ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243537 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
I am using cfoutput. I've not tried the others and in the past haven't needed them just to display a variable. It gives the error: Element THE_DATE is undefined in REQUEST. Have you used cfsilent /, cfcontent / or cfsetting enablecfoutputonly=true / perhaps? Did you use cfoutput / .. ? What *does* it show? Nothing it all, or just not the contents of the variable? Rens daniel kessler wrote: ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243538 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
Try changing the name of your App. It's most likely caching the application variables as set up in the initial load of your app.cfm file. I've had that happen to me before and changing the app name did it for me. It does appear to be something like this though. I went for a walk to think it through, came back and refreshed the page and it all worked fine. I refreshed again and I received the error again: Element THE_DATE is undefined in REQUEST. Here's the page: http://hhp.umd.edu/studentservices/CareerExpo/blocks/dsp_ExpoIndex.cfm?fuseaction=expohome ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243539 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
Hmm .. can't do much without seeing your actual code, but maybe you 'redefine' your request scope after your Application.cfm has been run. Something like cfscript request = structNew(); /* Or maybe this */ structClear( request ); /cfscript Would easily remove your properly set variable in the request scope. But like I said: it's just a suggestion, and I can't really tell what's going on without seeing any code. I guess you'll have to do some hardcore debugging yourself, so good luck with that :) Rens daniel kessler wrote: Try changing the name of your App. It's most likely caching the application variables as set up in the initial load of your app.cfm file. I've had that happen to me before and changing the app name did it for me. It does appear to be something like this though. I went for a walk to think it through, came back and refreshed the page and it all worked fine. I refreshed again and I received the error again: Element THE_DATE is undefined in REQUEST. Here's the page: http://hhp.umd.edu/studentservices/CareerExpo/blocks/dsp_ExpoIndex.cfm?fuseaction=expohome ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243540 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
I don't do structNew, but I could. I know you're not suggesting it, but then I'd at least know it's there. I did show the actual code. I pasted it into the first posting of this thread. Not sure what else you would need to see. Hmm .. can't do much without seeing your actual code, but maybe you 'redefine' your request scope after your Application.cfm has been run. Something like cfscript request = structNew(); /* Or maybe this */ structClear( request ); /cfscript ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243542 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
re: application variables
maybe I missed something but that code doesnt have much to do with each other.. Just the request.the_date part. Also why are you duplicating a session if it doesnt exist? Wouldn't it need to exist before you can duplicate it? cfif NOT structKeyExists(session,'user') cfset session.user = duplicate(variables.foo) /cfif cfset request.the_year = '2006' cfset request.the_date = 'May 4' Page Code: span class=heading2#request.the_date#, 2006br 10 am - 1 pmbr/span ~Dave - formerly known as the disruptor~ ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243544 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
Do you have another Application.cfm nested in a closer directory? ~Dave - formerly known as the disruptor~ From: daniel kessler [EMAIL PROTECTED] Sent: Wednesday, June 14, 2006 3:19 PM To: CF-Talk cf-talk@houseoffusion.com Subject: Re: application variables I am using cfoutput. I've not tried the others and in the past haven't needed them just to display a variable. It gives the error: Element THE_DATE is undefined in REQUEST. Have you used , or enablecfoutputonly=true / perhaps? Did you use .. ? What *does* it show? Nothing it all, or just not the contents of the variable? Rens daniel kessler wrote: ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243545 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
I did show the actual code. I pasted it into the first posting of this thread. Not sure what else you would need to see. The code you showed didnt have anything to do with each other, except the date part and if thats the only error then why not just put it on the page itself? Or do a cfparam at the top with a default setting ~Dave - formerly known as the disruptor~ ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243546 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
alright, it was an odd Dreamweaver problem/user error. I had the file open and then realized it was in the above directory. I then moved the file into an inner directory (without closing the old file and reopening it), then I adjusted the file and saved it. It saved a new file to the above directory (instead of saving to the old file) and all editing went to that new file that I didn't expect it to make. jeez sorry for the confusion. Hmm .. can't do much without seeing your actual code, but maybe you 'redefine' your request scope after your Application.cfm has been run. Something like cfscript request = structNew(); /* Or maybe this */ structClear( request ); /cfscript Would easily remove your properly set variable in the request scope. But like I said: it's just a suggestion, and I can't really tell what's going on without seeing any code. I guess you'll have to do some hardcore debugging yourself, so good luck with that :) Rens daniel kessler wrote: ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243547 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: application variables
alright, it was an odd Dreamweaver problem/user error. I had the file open and then realized it was in the above directory. I then moved the file into an inner directory (without closing the old file and reopening it), then I adjusted the file and saved it. It saved a new file to the above directory (instead of saving to the old file) and all editing went to that new file that I didn't expect it to make. jeez sorry for the confusion. Hmm .. can't do much without seeing your actual code, but maybe you 'redefine' your request scope after your Application.cfm has been run. Something like cfscript request = structNew(); /* Or maybe this */ structClear( request ); /cfscript Would easily remove your properly set variable in the request scope. But like I said: it's just a suggestion, and I can't really tell what's going on without seeing any code. I guess you'll have to do some hardcore debugging yourself, so good luck with that :) Rens daniel kessler wrote: ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243548 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
re: application variables
you might try to chance this: cfset request.the_date = 'May 4' to this cfset request.the_date = May 4 hey thats my bday:) ~Dave - formerly known as the disruptor~ From: dave [EMAIL PROTECTED] Sent: Wednesday, June 14, 2006 3:51 PM To: CF-Talk cf-talk@houseoffusion.com Subject: re: application variables maybe I missed something but that code doesnt have much to do with each other.. Just the request.the_date part. Also why are you duplicating a session if it doesnt exist? Wouldn't it need to exist before you can duplicate it? Page Code: #request.the_date#, 2006 10 am - 1 pm ~Dave - formerly known as the disruptor~ ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243549 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: application variables
That wouldn't have happened if you were using Eclipse, right Dave? ;-) (I just had to say it.) M!ke -Original Message- From: daniel kessler [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 14, 2006 2:56 PM To: CF-Talk Subject: Re: application variables alright, it was an odd Dreamweaver problem/user error. I had the file open and then realized it was in the above directory. I then moved the file into an inner directory (without closing the old file and reopening it), then I adjusted the file and saved it. It saved a new file to the above directory (instead of saving to the old file) and all editing went to that new file that I didn't expect it to make. jeez sorry for the confusion. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243554 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: application variables
lol, no kidding AND you'da had to ftp it himself and made sure it was in right directory. But hell, I still mostly use dw ~Dave - formerly known as the disruptor~ From: Dawson, Michael [EMAIL PROTECTED] Sent: Wednesday, June 14, 2006 5:39 PM To: CF-Talk cf-talk@houseoffusion.com Subject: RE: application variables That wouldn't have happened if you were using Eclipse, right Dave? ;-) (I just had to say it.) M!ke -Original Message- From: daniel kessler [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 14, 2006 2:56 PM To: CF-Talk Subject: Re: application variables alright, it was an odd Dreamweaver problem/user error. I had the file open and then realized it was in the above directory. I then moved the file into an inner directory (without closing the old file and reopening it), then I adjusted the file and saved it. It saved a new file to the above directory (instead of saving to the old file) and all editing went to that new file that I didn't expect it to make. jeez sorry for the confusion. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:243555 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Application variables from db?
With the main app I'm working on, the first thing in application.cfm is a query to match the host header name against the correct website in the database, then everything else is determined from there, including the application name -- so I'm hosting multiple websites/customers off the same code base, depending on what is in the database. cfquery name=rsOrganization datasource=hosting cachedwithin =#CreateTimespan(0,0,30,0)# select * from rsOrganization where OrgServername = '#CGI.server_name#' /cfquery CFAPPLICATION name=#rsOrganization.OrgShortname#_Root setclientcookies=Yes clientmanagement=Yes clientstorage=hostingClientVariables sessionmanagement=Yes sessiontimeout=#CreateTimespan(0,4,0,0)# applicationtimeout=#CreateTimespan(0,4,0,0)# setdomaincookies=Yes On 4/9/06 5:15 PM, Ken [EMAIL PROTECTED] wrote: Hi. Is it ok to set certain application variables in application.cfm from values stored in the database? There are certain site-wide settings that I need to store in the database. Then do this in the application.cfm file: CFIF NOT IsDefined Application.MySetting1 cfquery name=myquery dsn=dsn Select Settings from db Where /cfquery cfset Application.MySetting1 = myquery..MySetting1 /CFIF My questions are: 1. Is it ok to set application variables using the above method? 2. If I need to update the above Application.MySetting1 variable to a new value, how will I do so? Thanks, Ken. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:237304 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Application variables from db?
Hi. Is it ok to set certain application variables in application.cfm from values stored in the database? There are certain site-wide settings that I need to store in the database. Then do this in the application.cfm file: CFIF NOT IsDefined Application.MySetting1 cfquery name=myquery dsn=dsn Select Settings from db Where /cfquery cfset Application.MySetting1 = myquery..MySetting1 /CFIF My questions are: 1. Is it ok to set application variables using the above method? 2. If I need to update the above Application.MySetting1 variable to a new value, how will I do so? Thanks, Ken. I don't think there's anything necessarily wrong with having variables that are both in your database and in the application scope. I would recomment a slightly different approach. I would construct a CFC which accepts your dsn and clientid in its init method. I assume each row of this table represents a different client using the same application. I would then have the init method call a fetch method which fetches the row for the indicated client and populates values in the CFC's variables scope. Once that had been done I would implement a getSetting method for fetching an individual setting, and store the CFC in your application scope, thus, rather than referencing application.setting1 in your application, you would reference application.appMgr.getSetting(setting1) or possibly application.appMgr.getSetting1() if you prefer individual accessor methods. The advantage of this is that if you need to change the manner in which the settings are stored or managed later, it will be easiest to do that internally within the CFC if your application references this method, instead of directly referencing an application variable. Another setSetting() or individual setSetting1() methods can then update the CFC and the database (or other storage medium) simultanously. Now here's the rub. Do you need to manage these settings in a central application (one that can manage multiple client applications simultanously) or only within each individual application? If you don't need a centralized application for managing these, then it's pretty straightforward, and you can use the onApplicationStart method of your Application.cfc to instantiate and store your appMgr cfc in the application scope. If you need a centralized application then you'll have to find some way to get the data into each individual application when you update it. One way to do this is to use the cfapplication tag in your central application to temporarily relocate the current request into the target application and update its appMgr cfc -- the problem you'll experience with this approach will be to ensure that the application has already started, because if you use cfapplication to initialize the application name, the ColdFusion server won't know where to look for the Application.cfc and so it won't execute the onApplicationStart method. Using a simple http request for the application's login or home page using the cfhttp tag may be enough to ensure it's started before making changes. An alternative would be to build a webservice into each subordinate application, which of course brings other challenges with it. s. isaac dealey 434.293.6201 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 ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:237305 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Application variables from db?
Hi Charles. Got a question for you. Say you updated the value of the field OrgShortname in the database, for one of the websites. How soon would the application variable associated with it get updated? Also, in your code, are you not loading the database too much, since you have the query in your application.cfm file. How often is this query going to run? Thanks, Ken On 4/9/06, Charles Sheehan-Miles [EMAIL PROTECTED] wrote: With the main app I'm working on, the first thing in application.cfm is a query to match the host header name against the correct website in the database, then everything else is determined from there, including the application name -- so I'm hosting multiple websites/customers off the same code base, depending on what is in the database. cfquery name=rsOrganization datasource=hosting cachedwithin =#CreateTimespan(0,0,30,0)# select * from rsOrganization where OrgServername = '#CGI.server_name#' /cfquery CFAPPLICATION name=#rsOrganization.OrgShortname#_Root setclientcookies=Yes clientmanagement=Yes clientstorage=hostingClientVariables sessionmanagement=Yes sessiontimeout=#CreateTimespan(0,4,0,0)# applicationtimeout=#CreateTimespan(0,4,0,0)# setdomaincookies=Yes On 4/9/06 5:15 PM, Ken [EMAIL PROTECTED] wrote: Hi. Is it ok to set certain application variables in application.cfmfrom values stored in the database? There are certain site-wide settings that I need to store in the database. Then do this in the application.cfm file: CFIF NOT IsDefined Application.MySetting1 cfquery name=myquery dsn=dsn Select Settings from db Where /cfquery cfset Application.MySetting1 = myquery..MySetting1 /CFIF My questions are: 1. Is it ok to set application variables using the above method? 2. If I need to update the above Application.MySetting1 variable to a new value, how will I do so? Thanks, Ken. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:237307 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Application variables from db?
On 4/9/06, Ken [EMAIL PROTECTED] wrote: Hi Charles. Got a question for you. Say you updated the value of the field OrgShortname in the database, for one of the websites. How soon would the application variable associated with it get updated? Also, in your code, are you not loading the database too much, since you have the query in your application.cfm file. How often is this query going to run? Since it's in Application.cfm, which gets run once per request, it's getting run every request. Which means it's being get and set with each request. Sound place for a cgi type if deal, but the downside of having the query in the application.cfm is it's getting run each request as well, and depending on how you have your error trapping set up, you could hit a DB error before you've set you db error handling, or whatnot. Might make more sense, if there aren't a lot of sites, to store the list in memory and compare against that instead of running the query. You can use a structClear() to clear the application and session scopes, not to sure if the structClear on Application is kosher or not. :Denny -ps sorry for the lack of trimming/whatnot of my posts. Still getting used to gmail's way, which is s freaking slick it's not funny. I really gotta hand it to 'em, rocking UIs! ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:237315 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Application variables default timeout iin CFAdmin
It's up to you - if an application that hasn't been visited in three years is important, then set it to 999 days. You may decide the memory saving is worth a shorter timeout. On 1/27/06, Baz [EMAIL PROTECTED] wrote: Hi, In the CFAdmin, under 'Memory Variables', there's a default application variables timeout setting. I personally don't want my application variables to ever timeout, is it common practice to just put 999 days? Are there any issues to this? Is there any reason to want your app variables to timeout often? -- CFAJAX docs and other useful articles: http://jr-holmes.coldfusionjournal.com/ ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:230565 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Application Variables
The latter, you will have to do something more sophisticated to remove the variables. Something along the lines of storing their creation data/time and then removing the values after the hour is up. -- Ian Skinner Web Programmer BloodSource www.BloodSource.org Sacramento, CA C code. C code run. Run code run. Please! - Cynthia Dunning Confidentiality Notice: This message including any attachments is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender and delete any copies of this message. ~| Special thanks to the CF Community Suite Gold Sponsor - CFHosting.net http://www.cfhosting.net Message: http://www.houseoffusion.com/lists.cfm/link=i:4:183750 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Application Variables
Hi Ian. That is what I thought, but it was worth checking. Thanks. Andrew. On Tue, 9 Nov 2004 08:43:02 -0800, Ian Skinner [EMAIL PROTECTED] wrote: The latter, you will have to do something more sophisticated to remove the variables. Something along the lines of storing their creation data/time and then removing the values after the hour is up. -- Ian Skinner Web Programmer BloodSource www.BloodSource.org Sacramento, CA C code. C code run. Run code run. Please! - Cynthia Dunning Confidentiality Notice: This message including any attachments is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender and delete any copies of this message. ~| Special thanks to the CF Community Suite Gold Sponsor - CFHosting.net http://www.cfhosting.net Message: http://www.houseoffusion.com/lists.cfm/link=i:4:183806 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Application Variables in a CFC
You can read an explanation here: http://www.cfczone.org/faq.cfm#q10 Massimo Foti http://www.massimocorner.com Co-Author of Dreamweaver MX 2004 Magic: http://www.dwmagic.com/ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application Variables in a CFC
Try datesource=#Application.dsn#. U should declare it in Application.cfm page. Regards __ MSc. Hassan Arteaga Rodrguez Microsoft Certified System Engineer. DIGI- Grupo de Desarrollo COPEXTEL, S.A. _ From: Mickael [mailto:[EMAIL PROTECTED] Sent: Thursday, January 15, 2004 08:49 AM To: CF-Talk Subject: Application Variables in a CFC Hello All, I have started to learn to use CFC's.I tried making a simple CFC to performs a query that I need on may parts of my site. In all my cfquery tags I use datesource=#dsn# and it works fine.When I add this to the CFC it errors out.Yet it I place the actual DSN name from the ODBC connection it works?Is this a problem with me not scoping the variable?Shouldn't my application.cfm declare this prior to the CFC loading? Thanks Mike _ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
Re: Application Variables in a CFC
Thanks Massimo, that explains it - Original Message - From: Massimo Foti To: CF-Talk Sent: Thursday, January 15, 2004 8:50 AM Subject: Re: Application Variables in a CFC You can read an explanation here: http://www.cfczone.org/faq.cfm#q10 Massimo Foti http://www.massimocorner.com Co-Author of Dreamweaver MX 2004 Magic: http://www.dwmagic.com/ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
Now, how could I call this same object from the differenct application? You would think since it is in memory, there has to be way that I can retreive it. You can use the underlying java of CF to get a hold of the application scope for any currently active application: cfscript // application tracker object appObj = createObject(java, coldfusion.runtime.ApplicationScopeTracker); // get external app scope appScope = appObj.getApplicationScope(myappname); /cfscript Note that this is undocumented and so could well change in a future release of CF.Also if the app name you give it doesn't exist it won't error - you'll just get a java null value back, which CF isn't too hot on handling... For more info on using the ApplicationScopeTracker and similar SessionTracker have a look at http://tech.badpen.com/index.cfm?mode=entryentry=3 HTH, Tim. --- RAWNET LTD - Internet, New Media and ebusiness Gurus. Visit our new website at http://www.rawnet.com for more information about our company, or call us free anytime on 0800 294 24 24. --- Tim Blair Web Application Engineer, Rawnet Limited Direct Phone : +44 (0) 1344 393 441 Switchboard : +44 (0) 1344 393 040 --- This message may contain information which is legally privileged and/or confidential.If you are not the intended recipient, you are hereby notified that any unauthorised disclosure, copying, distribution or use of this information is strictly prohibited. Such notification notwithstanding, any comments, opinions, information or conclusions expressed in this message are those of the originator, not of rawnet limited, unless otherwise explicitly and independently indicated by an authorised representative of rawnet limited. --- [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
Thanks Tim! I will definitely try that out. Ricky _ From: Tim Blair [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 10, 2003 3:34 AM To: CF-Talk Subject: RE: Application variables between two applications Now, how could I call this same object from the differenct application? You would think since it is in memory, there has to be way that I can retreive it. You can use the underlying java of CF to get a hold of the application scope for any currently active application: cfscript // application tracker object appObj = createObject(java, coldfusion.runtime.ApplicationScopeTracker); // get external app scope appScope = appObj.getApplicationScope(myappname); /cfscript Note that this is undocumented and so could well change in a future release of CF.Also if the app name you give it doesn't exist it won't error - you'll just get a java null value back, which CF isn't too hot on handling... For more info on using the ApplicationScopeTracker and similar SessionTracker have a look at http://tech.badpen.com/index.cfm?mode=entry http://tech.badpen.com/index.cfm?mode=entryentry=3 entry=3 HTH, Tim. --- RAWNET LTD - Internet, New Media and ebusiness Gurus. Visit our new website at http://www.rawnet.com for more information about our company, or call us free anytime on 0800 294 24 24. --- Tim Blair Web Application Engineer, Rawnet Limited Direct Phone : +44 (0) 1344 393 441 Switchboard : +44 (0) 1344 393 040 --- This message may contain information which is legally privileged and/or confidential.If you are not the intended recipient, you are hereby notified that any unauthorised disclosure, copying, distribution or use of this information is strictly prohibited. Such notification notwithstanding, any comments, opinions, information or conclusions expressed in this message are those of the originator, not of rawnet limited, unless otherwise explicitly and independently indicated by an authorised representative of rawnet limited. --- _ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
Is the Admin tool _for_ the other web site? If so, then just share application names. Otherwise, you can consider using server variables to share data between the apps. Other options include using the ServiceFactory methods which are not supported but work pretty well. [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
The admin tool is for the other website. So in a nutshell, are you suggesting that I just rename the application name in the other website to match name of the application in the admin? Server variables - hmm...that might be a thought. I would prefer to keep them in the app scope, but if I have to use the server scope that is ok. Ricky _ From: Raymond Camden [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 09, 2003 10:40 AM To: CF-Talk Subject: RE: Application variables between two applications Is the Admin tool _for_ the other web site? If so, then just share application names. Otherwise, you can consider using server variables to share data between the apps. Other options include using the ServiceFactory methods which are not supported but work pretty well. _ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
The admin tool is for the other website. So in a nutshell, are you suggesting that I just rename the application name in the other website to match name of the application in the admin? No, not if the applications aren't truly the same. Server variables - hmm...that might be a thought. Just be aware that other apps on the box will also have access to the data. Really only an issue if you are on a shared machine. I would prefer to keep them in the app scope, but if I have to use the server scope that is ok. You can consider using CFCs as well. App1 would ping App2's CFC and request the data from it. [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
I have all the business logic in CFC's, but I am using many objects for these CFC's that pull the data in the application scope. For example, in my admin application I am using this to refresh my data set once the data has been manipulated. cfscript application.oPartnerCollection.Select_Corps(oPartner.Partner_ID,0,true); /cfscript Now, how could I call this same object from the differenct application? You would think since it is in memory, there has to be way that I can retreive it. Thx so far - your making think about ways that I can correct this in the future. Ricky _ From: Raymond Camden [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 09, 2003 11:00 AM To: CF-Talk Subject: RE: Application variables between two applications The admin tool is for the other website. So in a nutshell, are you suggesting that I just rename the application name in the other website to match name of the application in the admin? No, not if the applications aren't truly the same. Server variables - hmm...that might be a thought. Just be aware that other apps on the box will also have access to the data. Really only an issue if you are on a shared machine. I would prefer to keep them in the app scope, but if I have to use the server scope that is ok. You can consider using CFCs as well. App1 would ping App2's CFC and request the data from it. _ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
I would guess this is the reason for naming the application so that you _cannot_ access the variables from other applications.Imagine if you stored sensitive data in one application and it was somehow available within another application. (Especially in a shared hosting environment) I'm curious, however, what would happen if you had an application.cfm in the webroot that grabbed all of the information that you needed for any of your applications underneath that root.Then, I believe, they would all automatically inherit those application variables.Anyone have more insight on the workings of application.cfm in multiple directories? Example: WEBROOT -application.cfm |_ APPLICATION 1 |-application.cfm |_ APPLICATION 2 |-application.cfm John Burns -Original Message- From: Ricky Fritzsching [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 09, 2003 12:27 PM To: CF-Talk Subject: RE: Application variables between two applications I have all the business logic in CFC's, but I am using many objects for these CFC's that pull the data in the application scope. For example, in my admin application I am using this to refresh my data set once the data has been manipulated. cfscript application.oPartnerCollection.Select_Corps(oPartner.Partner_ID,0,true); /cfscript Now, how could I call this same object from the differenct application? You would think since it is in memory, there has to be way that I can retreive it. Thx so far - your making think about ways that I can correct this in the future. Ricky _ From: Raymond Camden [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 09, 2003 11:00 AM To: CF-Talk Subject: RE: Application variables between two applications The admin tool is for the other website. So in a nutshell, are you suggesting that I just rename the application name in the other website to match name of the application in the admin? No, not if the applications aren't truly the same. Server variables - hmm...that might be a thought. Just be aware that other apps on the box will also have access to the data. Really only an issue if you are on a shared machine. I would prefer to keep them in the app scope, but if I have to use the server scope that is ok. You can consider using CFCs as well. App1 would ping App2's CFC and request the data from it. _ _ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
What about using the server scope? Bert -Original Message- From: Ricky Fritzsching [mailto:[EMAIL PROTECTED] Sent: 09 December 2003 16:21 To: CF-Talk Subject: Application variables between two applications I have an administrative application that has persistent application variables that I would like to share into another application on the production side. When a user makes a change in the admin, it refreshes the persistence of the variables and I need it somehow to change in both the admin and production application. [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
If a subdirectory defines it's own application name, there will be a new application scope in that directory and below.The other application scope still exists, and if and when a file is called outside the sub-directory but under the original application, those variables are again available. We use this in our intranet, to parse off sections of our intranet that we want to behave differently. -- Ian Skinner Web Programmer BloodSource www.BloodSource.org Sacramento, CA -Original Message- From: John Burns [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 09, 2003 9:49 AM To: CF-Talk Subject: RE: Application variables between two applications I would guess this is the reason for naming the application so that you _cannot_ access the variables from other applications.Imagine if you stored sensitive data in one application and it was somehow available within another application. (Especially in a shared hosting environment) I'm curious, however, what would happen if you had an application.cfm in the webroot that grabbed all of the information that you needed for any of your applications underneath that root.Then, I believe, they would all automatically inherit those application variables.Anyone have more insight on the workings of application.cfm in multiple directories? Example: WEBROOT -application.cfm |_ APPLICATION 1 |-application.cfm |_ APPLICATION 2 |-application.cfm John Burns -Original Message- From: Ricky Fritzsching [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 09, 2003 12:27 PM To: CF-Talk Subject: RE: Application variables between two applications I have all the business logic in CFC's, but I am using many objects for these CFC's that pull the data in the application scope. For example, in my admin application I am using this to refresh my data set once the data has been manipulated. cfscript application.oPartnerCollection.Select_Corps(oPartner.Partner_ID,0,true); /cfscript Now, how could I call this same object from the differenct application? You would think since it is in memory, there has to be way that I can retreive it. Thx so far - your making think about ways that I can correct this in the future. Ricky _ From: Raymond Camden [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 09, 2003 11:00 AM To: CF-Talk Subject: RE: Application variables between two applications The admin tool is for the other website. So in a nutshell, are you suggesting that I just rename the application name in the other website to match name of the application in the admin? No, not if the applications aren't truly the same. Server variables - hmm...that might be a thought. Just be aware that other apps on the box will also have access to the data. Really only an issue if you are on a shared machine. I would prefer to keep them in the app scope, but if I have to use the server scope that is ok. You can consider using CFCs as well. App1 would ping App2's CFC and request the data from it. _ _ _ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
RE: Application variables between two applications
There was thread on this just a few days ago on alt.comp.lang.coldfusion - see it here: http://groups.google.com/groups?hl=en http://groups.google.com/groups?hl=enlr=ie=UTF-8oe=UTF-8threadm=bqtqji0 365%40enews1.newsguy.comrnum=1 lr=ie=UTF-8oe=UTF-8threadm=bqtqji0365%40enews1.newsguy.comrnum=1 I've got a long post in there talking about how to do this - and which describes one method for doing this using references (if you know what you're doing). Jim Davis _ From: Ricky Fritzsching [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 09, 2003 11:21 AM To: CF-Talk Subject: Application variables between two applications I have an administrative application that has persistent application variables that I would like to share into another application on the production side. When a user makes a change in the admin, it refreshes the persistence of the variables and I need it somehow to change in both the admin and production application. Any ideas? --- Ricky Fritzsching _ [Todays Threads] [This Message] [Subscription] [Fast Unsubscribe] [User Settings]
Re: Application variables
You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Cutter (CF_Talk) [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:00 AM Subject: Application variables I've been on http://www.benorama.com looking at a CF design pattern. In this tutorial it talks about using your Application.cfm to call _init.cfm, which parses through an xml file to create your application variables. I've done this (very closely following the sample app). I've created a page using cfdump to show me the application variables, but when I change my xml doc and refresh my page the application variables do not appear to update? Any ideas? Cutter ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting.
Re: Application variables
You can overwrite them with cfset ... though I typically use cfset request.myapp.myvar = something instead of application variables for this sort of thing also. The app could be using cfparam tags instead of cfset tags in which case it would chew through the xml file on each request unecessarily since the param won't overwrite the existing value. Or it could use something like cfif not structkeyexists(application,init) to determine when to load the application vars, in which case, it won't reload them when you modify the xml file because application.init already exists. You could use a url variable to force the app to reload the xml file in this situation, however, which wouldn't be too tough to accomplish or too hard on the server... cfparam name=url.init type=boolean default=#yesnoformat(not structkeyexists(application,init))# cfif url.init ... chew up the xml file here ... /cfif Then when you update the xml file, just load the application's default page with init=true in the query string You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Cutter (CF_Talk) [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:00 AM Subject: Application variables I've been on http://www.benorama.com looking at a CF design pattern. In this tutorial it talks about using your Application.cfm to call _init.cfm, which parses through an xml file to create your application variables. I've done this (very closely following the sample app). I've created a page using cfdump to show me the application variables, but when I change my xml doc and refresh my page the application variables do not appear to update? Any ideas? Cutter ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm
RE: Application variables
What's are the Pro's and Con's of using Request Variables over Application Var? -Original Message- From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:16 PM To: CF-Talk Subject: Re: Application variables You can overwrite them with cfset ... though I typically use cfset request.myapp.myvar = something instead of application variables for this sort of thing also. The app could be using cfparam tags instead of cfset tags in which case it would chew through the xml file on each request unecessarily since the param won't overwrite the existing value. Or it could use something like cfif not structkeyexists(application,init) to determine when to load the application vars, in which case, it won't reload them when you modify the xml file because application.init already exists. You could use a url variable to force the app to reload the xml file in this situation, however, which wouldn't be too tough to accomplish or too hard on the server... cfparam name=url.init type=boolean default=#yesnoformat(not structkeyexists(application,init))# cfif url.init ... chew up the xml file here ... /cfif Then when you update the xml file, just load the application's default page with init=true in the query string You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Cutter (CF_Talk) [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:00 AM Subject: Application variables I've been on http://www.benorama.com looking at a CF design pattern. In this tutorial it talks about using your Application.cfm to call _init.cfm, which parses through an xml file to create your application variables. I've done this (very closely following the sample app). I've created a page using cfdump to show me the application variables, but when I change my xml doc and refresh my page the application variables do not appear to update? Any ideas? Cutter ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm
Re: Application variables
Well a big plus is that you don't need to lock REQUEST scoped vars. Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -Original Message- From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:16 PM To: CF-Talk Subject: Re: Application variables You can overwrite them with cfset ... though I typically use cfset request.myapp.myvar = something instead of application variables for this sort of thing also. The app could be using cfparam tags instead of cfset tags in which case it would chew through the xml file on each request unecessarily since the param won't overwrite the existing value. Or it could use something like cfif not structkeyexists(application,init) to determine when to load the application vars, in which case, it won't reload them when you modify the xml file because application.init already exists. You could use a url variable to force the app to reload the xml file in this situation, however, which wouldn't be too tough to accomplish or too hard on the server... cfparam name=url.init type=boolean default=#yesnoformat(not structkeyexists(application,init))# cfif url.init ... chew up the xml file here ... /cfif Then when you update the xml file, just load the application's default page with init=true in the query string You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Cutter (CF_Talk) [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:00 AM Subject: Application variables I've been on http://www.benorama.com looking at a CF design pattern. In this tutorial it talks about using your Application.cfm to call _init.cfm, which parses through an xml file to create your application variables. I've done this (very closely following the sample app). I've created a page using cfdump to show me the application variables, but when I change my xml doc and refresh my page the application variables do not appear to update? Any ideas? Cutter ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Get the mailserver that powers this list at http://www.coolfusion.com
RE: Application variables
Depending on how you use them, in cfmx you don't need to lock application vars as well. === Raymond Camden, ColdFusion Jedi Master for Hire Email: [EMAIL PROTECTED] WWW : www.camdenfamily.com/morpheus Yahoo IM : morpheus My ally is the Force, and a powerful ally it is. - Yoda -Original Message- From: Bryan Stevenson [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:40 PM To: CF-Talk Subject: Re: Application variables Well a big plus is that you don't need to lock REQUEST scoped vars. Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting.
RE: Application variables
Do you have to set them each time, for each page? -Original Message- From: Bryan Stevenson [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:40 PM To: CF-Talk Subject: Re: Application variables Well a big plus is that you don't need to lock REQUEST scoped vars. Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -Original Message- From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:16 PM To: CF-Talk Subject: Re: Application variables You can overwrite them with cfset ... though I typically use cfset request.myapp.myvar = something instead of application variables for this sort of thing also. The app could be using cfparam tags instead of cfset tags in which case it would chew through the xml file on each request unecessarily since the param won't overwrite the existing value. Or it could use something like cfif not structkeyexists(application,init) to determine when to load the application vars, in which case, it won't reload them when you modify the xml file because application.init already exists. You could use a url variable to force the app to reload the xml file in this situation, however, which wouldn't be too tough to accomplish or too hard on the server... cfparam name=url.init type=boolean default=#yesnoformat(not structkeyexists(application,init))# cfif url.init ... chew up the xml file here ... /cfif Then when you update the xml file, just load the application's default page with init=true in the query string You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Cutter (CF_Talk) [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:00 AM Subject: Application variables I've been on http://www.benorama.com looking at a CF design pattern. In this tutorial it talks about using your Application.cfm to call _init.cfm, which parses through an xml file to create your application variables. I've done this (very closely following the sample app). I've created a page using cfdump to show me the application variables, but when I change my xml doc and refresh my page the application variables do not appear to update? Any ideas? Cutter ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm
Re: Application variables
Request variables and Application variables are two completely different things, so i don't know if they deserve direct comparison. It depends what you want to use them for. Request variables exist during a single page execution. They are not persistent across page requests. You do not need to lock them. If 100 users hit the same page at once, then 100 instances of each request variable will exist simultaneously. Request variables are available to all templates in the request, including custom tags. Because of this, I like to say that they are global to the request. Many people use them to avoid passing parameters into custom tags. I feel that is the only use for them over local variables (I.E. the variables scope ). Application variables are locked into an application via the cfapplication tag. They are persistent across page requests. You really should lock them. If 100 users hit the same page at once, then only 1 copy of each application variable will exist. They are available to all templates in the request, including custom tags. Does that give you enough to go on? At 10:40 AM 11/25/2002 -0800, you wrote: From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -- Jeffry Houser | mailto:[EMAIL PROTECTED] DotComIt, Putting you on the web AIM: Reboog711 | Phone: 1-203-379-0773 -- My CFMX Book: http://www.amazon.com/exec/obidos/ASIN/0072225564/instantcoldfu-20 My Books: http://www.instantcoldfusion.com My Band: http://www.farcryfly.com ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting.
RE: Application variables
So, it seems to me that in a purist sense, common values across all Users belong in application variables. -Original Message- From: Jeffry Houser [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 1:06 PM To: CF-Talk Subject: Re: Application variables Request variables and Application variables are two completely different things, so i don't know if they deserve direct comparison. It depends what you want to use them for. Request variables exist during a single page execution. They are not persistent across page requests. You do not need to lock them. If 100 users hit the same page at once, then 100 instances of each request variable will exist simultaneously. Request variables are available to all templates in the request, including custom tags. Because of this, I like to say that they are global to the request. Many people use them to avoid passing parameters into custom tags. I feel that is the only use for them over local variables (I.E. the variables scope ). Application variables are locked into an application via the cfapplication tag. They are persistent across page requests. You really should lock them. If 100 users hit the same page at once, then only 1 copy of each application variable will exist. They are available to all templates in the request, including custom tags. Does that give you enough to go on? At 10:40 AM 11/25/2002 -0800, you wrote: From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -- Jeffry Houser | mailto:[EMAIL PROTECTED] DotComIt, Putting you on the web AIM: Reboog711 | Phone: 1-203-379-0773 -- My CFMX Book: http://www.amazon.com/exec/obidos/ASIN/0072225564/instantcoldfu-20 My Books: http://www.instantcoldfusion.com My Band: http://www.farcryfly.com ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Get the mailserver that powers this list at http://www.coolfusion.com
Re: Application variables
Bryan Stevenson wrote: You have to restart CF to reset APPLICATION vars (timing out the app might work too). application=strucnew(); z ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Your ad could be here. Monies from ads go to support these lists and provide more resources for the community. http://www.fusionauthority.com/ads.cfm
Re: Application variables
And this doesn't suffer from the confusion of race conditions either since you can't have a race condition caused by a request var. Well a big plus is that you don't need to lock REQUEST scoped vars. Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -Original Message- From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:16 PM To: CF-Talk Subject: Re: Application variables You can overwrite them with cfset ... though I typically use cfset request.myapp.myvar = something instead of application variables for this sort of thing also. The app could be using cfparam tags instead of cfset tags in which case it would chew through the xml file on each request unecessarily since the param won't overwrite the existing value. Or it could use something like cfif not structkeyexists(application,init) to determine when to load the application vars, in which case, it won't reload them when you modify the xml file because application.init already exists. You could use a url variable to force the app to reload the xml file in this situation, however, which wouldn't be too tough to accomplish or too hard on the server... cfparam name=url.init type=boolean default=#yesnoformat(not structkeyexists(application,init))# cfif url.init ... chew up the xml file here ... /cfif Then when you update the xml file, just load the application's default page with init=true in the query string You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] s. isaac dealey954-776-0046 new epoch http://www.turnkey.to lead architect, tapestry cms http://products.turnkey.to certified advanced coldfusion 5 developer http://www.macromedia.com/v1/handlers/index.cfm?ID=21816 ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Get the mailserver that powers this list at http://www.coolfusion.com
RE: Application variables
Yea, you'd just use something like this in your application.cfm template: cfset request.myapp.dsn = mydsn cfset request.myapp.mailserver = mail.mydomain.com cfset request.myapp.url_login = https://www.mydomain.com/securelogin/index.cfm; etc... Do you have to set them each time, for each page? -Original Message- From: Bryan Stevenson [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:40 PM To: CF-Talk Subject: Re: Application variables Well a big plus is that you don't need to lock REQUEST scoped vars. Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -Original Message- From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:16 PM To: CF-Talk Subject: Re: Application variables You can overwrite them with cfset ... though I typically use cfset request.myapp.myvar = something instead of application variables for this sort of thing also. The app could be using cfparam tags instead of cfset tags in which case it would chew through the xml file on each request unecessarily since the param won't overwrite the existing value. Or it could use something like cfif not structkeyexists(application,init) to determine when to load the application vars, in which case, it won't reload them when you modify the xml file because application.init already exists. You could use a url variable to force the app to reload the xml file in this situation, however, which wouldn't be too tough to accomplish or too hard on the server... cfparam name=url.init type=boolean default=#yesnoformat(not structkeyexists(application,init))# cfif url.init ... chew up the xml file here ... /cfif Then when you update the xml file, just load the application's default page with init=true in the query string You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] --- -- Macromedia Associate Partner www.macromedia.com --- -- Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Cutter (CF_Talk) [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:00 AM Subject: Application variables I've been on http://www.benorama.com looking at a CF design pattern. In this tutorial it talks about using your Application.cfm to call _init.cfm, which parses through an xml file to create your application variables. I've done this (very closely following the sample app). I've created a page using cfdump to show me the application variables, but when I change my xml doc and refresh my page the application variables do not appear to update? Any ideas? Cutter ~~ ~~~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index. cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm s. isaac dealey954-776-0046 new epoch http://www.turnkey.to lead architect, tapestry cms http://products.turnkey.to certified advanced coldfusion 5 developer http://www.macromedia.com/v1/handlers/index.cfm?ID=21816 ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting.
RE: Application variables
I would agree. At a conceptual level. If a variable is being used a lot, however, it may make not make sense to store it in a local (or request) variable to avoid the need for locks. Of course, that was in CF5. I don't know of best practices for CFMX yet. At 01:08 PM 11/25/2002 -0600, you wrote: So, it seems to me that in a purist sense, common values across all Users belong in application variables. -Original Message- From: Jeffry Houser [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 1:06 PM To: CF-Talk Subject: Re: Application variables Request variables and Application variables are two completely different things, so i don't know if they deserve direct comparison. It depends what you want to use them for. Request variables exist during a single page execution. They are not persistent across page requests. You do not need to lock them. If 100 users hit the same page at once, then 100 instances of each request variable will exist simultaneously. Request variables are available to all templates in the request, including custom tags. Because of this, I like to say that they are global to the request. Many people use them to avoid passing parameters into custom tags. I feel that is the only use for them over local variables (I.E. the variables scope ). Application variables are locked into an application via the cfapplication tag. They are persistent across page requests. You really should lock them. If 100 users hit the same page at once, then only 1 copy of each application variable will exist. They are available to all templates in the request, including custom tags. Does that give you enough to go on? At 10:40 AM 11/25/2002 -0800, you wrote: From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -- Jeffry Houser | mailto:[EMAIL PROTECTED] DotComIt, Putting you on the web AIM: Reboog711 | Phone: 1-203-379-0773 -- My CFMX Book: http://www.amazon.com/exec/obidos/ASIN/0072225564/instantcoldfu-20 My Books: http://www.instantcoldfusion.com My Band: http://www.farcryfly.com ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting.
Re: Application variables
Bryan Stevenson wrote: You have to restart CF to reset APPLICATION vars (timing out the app might work too). application=strucnew(); I'm not necessarily convinced that would clear the application scope rather than creating a local variable called application. structclear(application); might be better. s. isaac dealey954-776-0046 new epoch http://www.turnkey.to lead architect, tapestry cms http://products.turnkey.to certified advanced coldfusion 5 developer http://www.macromedia.com/v1/handlers/index.cfm?ID=21816 ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting.
RE: Application variables
Storing variables in the application scope allows you to temporarily change application-wide settings, which can be useful at times, for instance, if you had an application which required scheduled maintenance to take several minutes ( or hours or however long ), it's possible you might want to log all users out or at least just preven them from making updates which might interfere with the maintenance, in which case, you would want to use something like this cfparam name=application.maintenanceperiod type=boolean default=false / in your application.cfm template -- then in the template for your scheduled task to perform maintenance, you would use cfset application.maintenanceperiod = true / ... do maintenance here ... cfset application.maintenanceperiod = false / On CF 5 you would want to lock references to your application.maintenanceperiod variable, however, the viability of this as a means of isolating the maintenance routine is still good in either CF 5 or CF MX. On the other hand, I would tend to avoid placing variables like datasource names, server addresses ( mail server for instance ) and url's in the application scope because these variables change rarely and usually not for short periods of time, so imo placing them in the application scope is an unnecessary use of persistent memory and it's best to just declare them in the application.cfm or the like and then update that template when changes are necessary. I'm not saying this is best case or anything -- just my opinions about it. s. isaac dealey954-776-0046 new epoch http://www.turnkey.to lead architect, tapestry cms http://products.turnkey.to certified advanced coldfusion 5 developer http://www.macromedia.com/v1/handlers/index.cfm?ID=21816 I would agree. At a conceptual level. If a variable is being used a lot, however, it may make not make sense to store it in a local (or request) variable to avoid the need for locks. Of course, that was in CF5. I don't know of best practices for CFMX yet. At 01:08 PM 11/25/2002 -0600, you wrote: So, it seems to me that in a purist sense, common values across all Users belong in application variables. -Original Message- From: Jeffry Houser [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 1:06 PM To: CF-Talk Subject: Re: Application variables Request variables and Application variables are two completely different things, so i don't know if they deserve direct comparison. It depends what you want to use them for. Request variables exist during a single page execution. They are not persistent across page requests. You do not need to lock them. If 100 users hit the same page at once, then 100 instances of each request variable will exist simultaneously. Request variables are available to all templates in the request, including custom tags. Because of this, I like to say that they are global to the request. Many people use them to avoid passing parameters into custom tags. I feel that is the only use for them over local variables (I.E. the variables scope ). Application variables are locked into an application via the cfapplication tag. They are persistent across page requests. You really should lock them. If 100 users hit the same page at once, then only 1 copy of each application variable will exist. They are available to all templates in the request, including custom tags. Does that give you enough to go on? At 10:40 AM 11/25/2002 -0800, you wrote: From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -- Jeffry Houser | mailto:[EMAIL PROTECTED] DotComIt, Putting you on the web AIM: Reboog711 | Phone: 1-203-379-0773 -- My CFMX Book: http://www.amazon.com/exec/obidos/ASIN/0072225564/instant coldfu-20 My Books: http://www.instantcoldfusion.com My Band: http://www.farcryfly.com ~~ ~~~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index. cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting. ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm
Re: Application variables
Nope. I will generally test for the existence of one of my REQUEST vars in Application.cfm. If it doesn't exist I assume none of them are set and I use CFPARAM to set them all. Once set they won't be reset on every page. If I ever need to reset them, I just comment out the CFIF that checks for the existence of one of them and re-save the file and hit any page in the system. HTH Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:57 AM Subject: RE: Application variables Do you have to set them each time, for each page? -Original Message- From: Bryan Stevenson [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:40 PM To: CF-Talk Subject: Re: Application variables Well a big plus is that you don't need to lock REQUEST scoped vars. Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -Original Message- From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:16 PM To: CF-Talk Subject: Re: Application variables You can overwrite them with cfset ... though I typically use cfset request.myapp.myvar = something instead of application variables for this sort of thing also. The app could be using cfparam tags instead of cfset tags in which case it would chew through the xml file on each request unecessarily since the param won't overwrite the existing value. Or it could use something like cfif not structkeyexists(application,init) to determine when to load the application vars, in which case, it won't reload them when you modify the xml file because application.init already exists. You could use a url variable to force the app to reload the xml file in this situation, however, which wouldn't be too tough to accomplish or too hard on the server... cfparam name=url.init type=boolean default=#yesnoformat(not structkeyexists(application,init))# cfif url.init ... chew up the xml file here ... /cfif Then when you update the xml file, just load the application's default page with init=true in the query string You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Cutter (CF_Talk) [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:00 AM Subject: Application variables I've been on http://www.benorama.com looking at a CF design pattern. In this tutorial it talks about using your Application.cfm to call _init.cfm, which parses through an xml file to create your application variables. I've done this (very closely following the sample app). I've created a page using cfdump to show me the application variables, but when I change my xml doc and refresh my page the application variables do not appear to update? Any ideas? Cutter ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm
Re: Application variables
wasn't my idea ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: S. Isaac Dealey [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 12:29 PM Subject: Re: Application variables Bryan Stevenson wrote: You have to restart CF to reset APPLICATION vars (timing out the app might work too). application=strucnew(); I'm not necessarily convinced that would clear the application scope rather than creating a local variable called application. structclear(application); might be better. s. isaac dealey954-776-0046 new epoch http://www.turnkey.to lead architect, tapestry cms http://products.turnkey.to certified advanced coldfusion 5 developer http://www.macromedia.com/v1/handlers/index.cfm?ID=21816 ~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribeforumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq 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
Re: Application variables
I believe you are mixing up request and application variables. If the application.cfm is running, then it is safe to assume that this is a new page request, and request variables have not been defined yet (unless they were defined earlier in the Application.cfm ) Additionally, if you feel safe assuming that if the one you check for is not set, then none are not set, use cfset ( or even better CFSCript) to set the variables. This will allow you to avoid the extra overhead with cfparam. At 11:09 AM 11/25/2002 -0800, you wrote: Nope. I will generally test for the existence of one of my REQUEST vars in Application.cfm. If it doesn't exist I assume none of them are set and I use CFPARAM to set them all. Once set they won't be reset on every page. If I ever need to reset them, I just comment out the CFIF that checks for the existence of one of them and re-save the file and hit any page in the system. HTH Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:57 AM Subject: RE: Application variables Do you have to set them each time, for each page? -Original Message- From: Bryan Stevenson [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:40 PM To: CF-Talk Subject: Re: Application variables Well a big plus is that you don't need to lock REQUEST scoped vars. Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Andy Ousterhout [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:31 AM Subject: RE: Application variables What's are the Pro's and Con's of using Request Variables over Application Var? -Original Message- From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]] Sent: Monday, November 25, 2002 12:16 PM To: CF-Talk Subject: Re: Application variables You can overwrite them with cfset ... though I typically use cfset request.myapp.myvar = something instead of application variables for this sort of thing also. The app could be using cfparam tags instead of cfset tags in which case it would chew through the xml file on each request unecessarily since the param won't overwrite the existing value. Or it could use something like cfif not structkeyexists(application,init) to determine when to load the application vars, in which case, it won't reload them when you modify the xml file because application.init already exists. You could use a url variable to force the app to reload the xml file in this situation, however, which wouldn't be too tough to accomplish or too hard on the server... cfparam name=url.init type=boolean default=#yesnoformat(not structkeyexists(application,init))# cfif url.init ... chew up the xml file here ... /cfif Then when you update the xml file, just load the application's default page with init=true in the query string You have to restart CF to reset APPLICATION vars (timing out the app might work too). Personally I like to use REQUEST scope over APPLICATION scope ;-) Bryan Stevenson B.Comm. VP Director of E-Commerce Development Electric Edge Systems Group Inc. t. 250.920.8830 e. [EMAIL PROTECTED] - Macromedia Associate Partner www.macromedia.com - Vancouver Island ColdFusion Users Group Founder Director www.cfug-vancouverisland.com - Original Message - From: Cutter (CF_Talk) [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, November 25, 2002 10:00 AM Subject: Application variables I've been on http://www.benorama.com looking at a CF design pattern. In this tutorial it talks about using your Application.cfm to call _init.cfm, which parses through an xml file to create your application variables. I've done this (very closely following the sample app). I've created a page using cfdump to show me the application variables, but when I change my xml doc and refresh my page the application
Re: Application Variables
That's what we do - set all application variables if one is not set; if it exists then we assume all application vars are set. We have the application var timeout set to 1 day in CF Admin. We use a session variable to determine if the user is logged in. That way if the server restarts itself (due to unresponsive threads, for instance) then the user must log back in, rather than get a variable not found error. Chris Norloff -- Original Message -- from: Jim Curran [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] date: Mon, 6 May 2002 14:23:32 -0400 Hey all, I want to use application variables for a site, but one question comes to mind. I have all my app variables set in one template. Upon configuring the template, I hit that template to set all variables (makes sense). Now, while my application is in use, I check (in Application.cfm) to see if one of the vars is defined. If not, I cfinclude the config template. If (given the slim chance) the app variables time out, is there anyway to reset them other than having an CFIF statement check on every page hit? I know the overhead is really low, but just based on the ideas of the app vars, i thought maybe there was a better way. Let me know if I'm being wy too picky about this. thanks. - j __ 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/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
Re: Application Variables
Hey all, I want to use application variables for a site, but one question comes to mind. I have all my app variables set in one template. Upon configuring the template, I hit that template to set all variables (makes sense). Now, while my application is in use, I check (in Application.cfm) to see if one of the vars is defined. If not, I cfinclude the config template. If (given the slim chance) the app variables time out, is there anyway to reset them other than having an CFIF statement check on every page hit? I know the overhead is really low, but just based on the ideas of the app vars, i thought maybe there was a better way. Let me know if I'm being wy too picky about this. First off, you're being picky. I understand you're desire to cut out any and all fat from performance. But, as mentioned hundreds of times on this list, whatever overhead might be associated with that IF statement in negligible because there are other areas that will have much more of an impact on your app's performance. Look at those things first before you start scrutinizing an IF statement! Second, do you really have to use application variables? I personally hate them because of the whole locking issue. I'd rather spend the quite minimal overhead of setting a few variables on each page request via an include in Application.cfm than have to deal with locking. I have an app where I set 25 variables on each page load (page settings, colors, datasources, etc.), and the overhead is virtually negligible. When I stress tested it under a load of 100 threads (which I know is arbitrary and varies from system to system), that template takes a maximum of 10 milliseconds to process. That's a penalty I'll gladly accept if I don't have to worry about the locking BS. Just my .02 though. You may have perfectly valid reasons for using application variables. I just hate them. Regards, Dave. __ Get the mailserver that powers this list at http://www.coolfusion.com FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Application Variables
Thanks... I think I'll go that route... - j -Original Message- From: Dave Carabetta [mailto:[EMAIL PROTECTED]] Sent: Monday, May 06, 2002 4:35 PM To: CF-Talk Subject: Re: Application Variables Hey all, I want to use application variables for a site, but one question comes to mind. I have all my app variables set in one template. Upon configuring the template, I hit that template to set all variables (makes sense). Now, while my application is in use, I check (in Application.cfm) to see if one of the vars is defined. If not, I cfinclude the config template. If (given the slim chance) the app variables time out, is there anyway to reset them other than having an CFIF statement check on every page hit? I know the overhead is really low, but just based on the ideas of the app vars, i thought maybe there was a better way. Let me know if I'm being wy too picky about this. First off, you're being picky. I understand you're desire to cut out any and all fat from performance. But, as mentioned hundreds of times on this list, whatever overhead might be associated with that IF statement in negligible because there are other areas that will have much more of an impact on your app's performance. Look at those things first before you start scrutinizing an IF statement! Second, do you really have to use application variables? I personally hate them because of the whole locking issue. I'd rather spend the quite minimal overhead of setting a few variables on each page request via an include in Application.cfm than have to deal with locking. I have an app where I set 25 variables on each page load (page settings, colors, datasources, etc.), and the overhead is virtually negligible. When I stress tested it under a load of 100 threads (which I know is arbitrary and varies from system to system), that template takes a maximum of 10 milliseconds to process. That's a penalty I'll gladly accept if I don't have to worry about the locking BS. Just my .02 though. You may have perfectly valid reasons for using application variables. I just hate them. Regards, Dave. __ Get the mailserver that powers this list at http://www.coolfusion.com FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: application variables
or you can do cflock name=appvars type=exclusive timeout=5 throwontimeout=yes cfscript application.myVar = this is a test; application.myVar2 = this is also a test; application.foo = bar; /cfscript /cflock If you bench mark these calls, you do find out that naming the lock when accessing APPLICATION vars is more efficient, rather than using the scope=application. If you choose to do this though, make sure you re-use the same lock name when you access all application references, including READ locks, otherwise you run into issues. cflock name=appvars type=readonly timeout=5 throwontimeout=yes cfscript myvar1 = application.myVar; myvar2 = application.myVar2; foobar = application.foo; /cfscript /cflock Cheers, Timothy Stadinski Senior Software Engineer Afternic.com -Original Message- From: Brent Goldman [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 07, 2001 7:45 PM To: CF-Talk Subject: RE: application variables Hi Nick, You need to specify the APPLICATION scope in your CFLOCK tag. You should put the following CFML around any other CFML that access the application scope: cflock scope=application type=exclusive timeout=10 ...CFML... /cflock -Brent -Original Message- From: Nick Le Mouton [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 07, 2001 4:33 PM To: CF-Talk Subject: application variables I have been told that when setting application variables it is good programming practice to put a cflock around them so on some of my pages in my application would i do the following? cflock type=EXCLUSIVE timeout=10 cfset application.something = something /cflock Thanks ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
Re: Application Variables
You can assign a query recordset into an Application variable, it may be less expensive for you to check for an existance of an Application variable as opposed to running your query every time and again (and for each user). This is something I want to implement, but it still confuses me. On my site, a query called getadvert might get a record with an ID of 1987 for example. Another user at the site might be running the same query, but getting a record of 981. Surely if the query is assigned into an App Var, it's pointless because the query would have to be re-run each time anyway to update it. (otherwise a user looking for a record ID of 981 might get 1987). Can you explain perhaps? Thanks -- Will new media discussion for Berkshire -=- http://bnm.lukrative.com local classifieds -=- http://www.localbounty.com e: [EMAIL PROTECTED] icq: 31099745 ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
Re: Application Variables
Steve, Application vars are great for controlling attributes that occasionally change (or frequently for that matter) that you want to affect the whole application. Say you wanted to have bgcolor across your entire site change according to the time of day. You can code your application.cfm or a header.cfm script to CFSET Application.BGColor = whatevercoloryouwant based on the time of day. Then, instead of coding this in the top of each script, you can simply call the #Application.BGColor# variable in each script, and it will automatically be what you want it to be for everyone calling your application. Dave - Original Message - From: Steve Reich [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Friday, June 29, 2001 5:00 PM Subject: Application Variables Seems basic, but I've never really addressed this. Assuming this code is in my application.cfm file, what is the difference in these two cfset bgcolor=black .and... cfset application.bgcolor=black I guess I need a quick lesson on application variables. I know they are included in the scope defined in the cfapplication tag, but what are pros and cons? I have a small dev box with only 256 RAM. I have CF 4.5 and SQL7 running on it so as you can imagine, it's quite slow. I'm wondering how much RAM is used storing application variables? Could I increase performance (albeit more theoretically) by not using application vars? If I am looking for server performance over speed, the first one seems the way to go since it's not a persistent variable. I'm only faking it by putting it in the app.cfm file. Along this line, do I even need application variables? What's the story? Thanks, Steve ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
Re: Application Variables
David, But since you have to put locks around application variables wouldn't it be more efficient to use a request scope variable for this. In your application. cfm: cfset request.backgroundcolor=whatever Then you don't need to lock every time you need to use it. I find that since the request scope became available I hardly ever use application variables. Don - Original Message - From: David Hannum [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Saturday, June 30, 2001 8:27 AM Subject: Re: Application Variables Steve, Application vars are great for controlling attributes that occasionally change (or frequently for that matter) that you want to affect the whole application. Say you wanted to have bgcolor across your entire site change according to the time of day. You can code your application.cfm or a header.cfm script to CFSET Application.BGColor = whatevercoloryouwant based on the time of day. Then, instead of coding this in the top of each script, you can simply call the #Application.BGColor# variable in each script, and it will automatically be what you want it to be for everyone calling your application. Dave - Original Message - From: Steve Reich [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Friday, June 29, 2001 5:00 PM Subject: Application Variables Seems basic, but I've never really addressed this. Assuming this code is in my application.cfm file, what is the difference in these two cfset bgcolor=black .and... cfset application.bgcolor=black I guess I need a quick lesson on application variables. I know they are included in the scope defined in the cfapplication tag, but what are pros and cons? I have a small dev box with only 256 RAM. I have CF 4.5 and SQL7 running on it so as you can imagine, it's quite slow. I'm wondering how much RAM is used storing application variables? Could I increase performance (albeit more theoretically) by not using application vars? If I am looking for server performance over speed, the first one seems the way to go since it's not a persistent variable. I'm only faking it by putting it in the app.cfm file. Along this line, do I even need application variables? What's the story? Thanks, Steve ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
Re: Application Variables
GetAdvert sounds like it may be a query to collect a random ad from a database? One approach that worked very well for me was to run the query once and then store the ads in an application scoped array. This makes retrieving a new ad much quicker. You may want to take a look at this Application array here. http://cfhub.com/tutorials/BannerMan/customtag/pick.cfm On my site, a query called getadvert might get a record with an ID of 1987 for example. Another user at the site might be running the same query, but getting a record of 981 ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
Re: Application Variables
GetAdvert sounds like it may be a query to collect a random ad from a database? Yes and no. If a user runs a search for, say, furniture, this might retreive 15 adverts which would be using a query such as: cfquery name=getadvert datasource=#DSN# SELECT * FROM advert_details WHERE body like '%furniture%' /cfquery Another user might be browsing the Computer's category: cfquery name=getadvert datasource=#DSN# SELECT * FROM advert_details WHERE cat = 156 /cfquery And so on. They use the same query name, and results are obtained by running a template which always uses Cfoutput query=getadvert I like the idea of stuffing them into an Application Var to speed things up, but is it really plausible to put 1000+ Adverts into an App Var? Will One approach that worked very well for me was to run the query once and then store the ads in an application scoped array. This makes retrieving a new ad much quicker. You may want to take a look at this Application array here. http://cfhub.com/tutorials/BannerMan/customtag/pick.cfm On my site, a query called getadvert might get a record with an ID of 1987 for example. Another user at the site might be running the same query, but getting a record of 981 ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
Re: Application Variables
lol. I see now :) While the approach for this BannerMan tag would work even with your categories you would be using up some RAM. I would say that each ad would require about 300-500 bytes so 1000 may be close to half a meg... Pretty substantial ram usage just for an imge rotator :) - Original Message - From: W Luke [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Saturday, June 30, 2001 1:12 PM Subject: Re: Application Variables GetAdvert sounds like it may be a query to collect a random ad from a database? Yes and no. If a user runs a search for, say, furniture, this might retreive 15 adverts which would be using a query such as: cfquery name=getadvert datasource=#DSN# SELECT * FROM advert_details WHERE body like '%furniture%' /cfquery Another user might be browsing the Computer's category: cfquery name=getadvert datasource=#DSN# SELECT * FROM advert_details WHERE cat = 156 /cfquery And so on. They use the same query name, and results are obtained by running a template which always uses Cfoutput query=getadvert I like the idea of stuffing them into an Application Var to speed things up, but is it really plausible to put 1000+ Adverts into an App Var? Will One approach that worked very well for me was to run the query once and then store the ads in an application scoped array. This makes retrieving a new ad much quicker. You may want to take a look at this Application array here. http://cfhub.com/tutorials/BannerMan/customtag/pick.cfm On my site, a query called getadvert might get a record with an ID of 1987 for example. Another user at the site might be running the same query, but getting a record of 981 ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
Re: Application Variables
First, I used a very elementary example. A better use might be calling a DSN for an application. Second, you'd only need to lock application variables when you're writing to them. Unlike session variables, that get written to and overwritten time and again as in a shopping cart, I'd only allow administrative scripts to write to the application vars, thus eliminating the need for the read only locks Dave - Original Message - From: Don Vawter [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Saturday, June 30, 2001 11:08 AM Subject: Re: Application Variables David, But since you have to put locks around application variables wouldn't it be more efficient to use a request scope variable for this. In your application. cfm: cfset request.backgroundcolor=whatever Then you don't need to lock every time you need to use it. I find that since the request scope became available I hardly ever use application variables. Don - Original Message - From: David Hannum [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Saturday, June 30, 2001 8:27 AM Subject: Re: Application Variables Steve, Application vars are great for controlling attributes that occasionally change (or frequently for that matter) that you want to affect the whole application. Say you wanted to have bgcolor across your entire site change according to the time of day. You can code your application.cfm or a header.cfm script to CFSET Application.BGColor = whatevercoloryouwant based on the time of day. Then, instead of coding this in the top of each script, you can simply call the #Application.BGColor# variable in each script, and it will automatically be what you want it to be for everyone calling your application. Dave - Original Message - From: Steve Reich [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Friday, June 29, 2001 5:00 PM Subject: Application Variables Seems basic, but I've never really addressed this. Assuming this code is in my application.cfm file, what is the difference in these two cfset bgcolor=black .and... cfset application.bgcolor=black I guess I need a quick lesson on application variables. I know they are included in the scope defined in the cfapplication tag, but what are pros and cons? I have a small dev box with only 256 RAM. I have CF 4.5 and SQL7 running on it so as you can imagine, it's quite slow. I'm wondering how much RAM is used storing application variables? Could I increase performance (albeit more theoretically) by not using application vars? If I am looking for server performance over speed, the first one seems the way to go since it's not a persistent variable. I'm only faking it by putting it in the app.cfm file. Along this line, do I even need application variables? What's the story? Thanks, Steve ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Application Variables
There are several benefits to Application metrics, unfortunately I don't know about any metrics. Maybe some of the gurus here can help you in that department. Application vars are shared. So as soon as you have more than one user, you shoud start reaping some performance benefits. You can set an Application variable on any page of your site if you need to access a global variable, not just in Application.cfm. You can assign a query recordset into an Application variable, it may be less expensive for you to check for an existance of an Application variable as opposed to running your query every time and again (and for each user). As far as your simple example there is probably no measurable benefit. Also, there's that little matter of convinience of NOT using Application variables all over the place, as you must cflock them. The applications we've designing were never high traffic apps, so I've never ran into a problem by not using CFLOCK, however, since 4.5 came out, we've turned on the automatic read locking, and made sure that writes are explicitely locked. One final point, RAM is very cheap now. You can pick up a 256MB DIMM for $50. -Original Message- From: Steve Reich [mailto:[EMAIL PROTECTED]] Seems basic, but I've never really addressed this. Assuming this code is in my application.cfm file, what is the difference in these two cfset bgcolor=black .and... cfset application.bgcolor=black I guess I need a quick lesson on application variables. I know they are included in the scope defined in the cfapplication tag, but what are pros and cons? I have a small dev box with only 256 RAM. I have CF 4.5 and SQL7 running on it so as you can imagine, it's quite slow. I'm wondering how much RAM is used storing application variables? Could I increase performance (albeit more theoretically) by not using application vars? If I am looking for server performance over speed, the first one seems the way to go since it's not a persistent variable. I'm only faking it by putting it in the app.cfm file. Along this line, do I even need application variables? What's the story? Thanks, Steve ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Application Variables
Since the application and server scopes are stored in structures, you could clear them all with: cfset structclear(application) cfset structclear(server) -Original Message- From: Peter Alexandrou [mailto:[EMAIL PROTECTED]] Sent: Sunday, October 29, 2000 6:20 PM To: CF-Talk Subject: Application Variables Guys, Is there anyway of resetting application variables in CF? i.e. I have an application and would like administrators to be able to log in and select an option that resetsout all application and server variables. Thanks, Peter Alexandrou Technical Leader tapestry communications : www.tapestry.net.au level 4, 32 walker street north sydney NSW 2060 australia phone : +61 2 9929 7400 mobile : +61 411 445 111 e-mail : [EMAIL PROTECTED] -- -- Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists or send a message with 'unsubscribe' in the body to [EMAIL PROTECTED] Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists or send a message with 'unsubscribe' in the body to [EMAIL PROTECTED]
Re: Application Variables
My mistake: This works for application variables, but not for server variables. David - Original Message - From: David Gassner [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Monday, October 30, 2000 3:18 PM Subject: RE: Application Variables Since the application and server scopes are stored in structures, you could clear them all with: cfset structclear(application) cfset structclear(server) -Original Message- From: Peter Alexandrou [mailto:[EMAIL PROTECTED]] Sent: Sunday, October 29, 2000 6:20 PM To: CF-Talk Subject: Application Variables Guys, Is there anyway of resetting application variables in CF? i.e. I have an application and would like administrators to be able to log in and select an option that resetsout all application and server variables. Thanks, Peter Alexandrou Technical Leader tapestry communications : www.tapestry.net.au level 4, 32 walker street north sydney NSW 2060 australia phone : +61 2 9929 7400 mobile : +61 411 445 111 e-mail : [EMAIL PROTECTED] -- -- Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists or send a message with 'unsubscribe' in the body to [EMAIL PROTECTED] -- -- Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists or send a message with 'unsubscribe' in the body to [EMAIL PROTECTED] Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists or send a message with 'unsubscribe' in the body to [EMAIL PROTECTED]
Re: Application Variables
CFSET Application.VariableName = "value" Dave - Original Message - From: Peter Alexandrou [EMAIL PROTECTED] To: CF-Talk [EMAIL PROTECTED] Sent: Sunday, October 29, 2000 9:20 PM Subject: Application Variables Guys, Is there anyway of resetting application variables in CF? i.e. I have an application and would like administrators to be able to log in and select an option that resetsout all application and server variables. Thanks, Peter Alexandrou Technical Leader tapestry communications : www.tapestry.net.au level 4, 32 walker street north sydney NSW 2060 australia phone : +61 2 9929 7400 mobile : +61 411 445 111 e-mail : [EMAIL PROTECTED] Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists or send a message with 'unsubscribe' in the body to [EMAIL PROTECTED] Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists or send a message with 'unsubscribe' in the body to [EMAIL PROTECTED]
RE: Application Variables in DB?
Can application variables be stored in a database (by CF, not by me) like client variables? This would be handy for persistence between application runs should the server be rebooted. No, they're only stored in memory. You could write something to store and initialize application variables using a database, though. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ voice: (202) 797-5496 fax: (202) 797-5444 -- Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ To Unsubscribe visit http://www.houseoffusion.com/index.cfm?sidebar=listsbody=lists/cf_talk or send a message to [EMAIL PROTECTED] with 'unsubscribe' in the body.
