Mike Schierberl just posted a great example on why to user varScoper. It's a must read for those who have not fully understood the reasoning behind var scoping.
You can catch the post here:
http://www.schierberl.com/cfblog/index.cfm/2008/7/21/Thread-safety-and-the-var-scope--live-example
A little while back I created a small app that shows how you can use Spry Datasets with Mach-II. Since then I have made a few modifications to help show ways you can use other frameworks within the app (ColdSpring is used within this example). I strongly suggest reviewing Chris Scott's example on AOP in ColdSpring if you need to know more about that subject.
Recently I have started to assist on a project that is meant to talk to Cold Fusion 8’s adminAPI to help with environment setups. One main task I have in front of me is to update setting within administrator through such methods as setRuntimeProperty and setCacheProperty.
My issue has been that I have not yet found a good list of property names that the above methods need in order to work. So I started to dig and found the below property names. For those who use these method and know of other lists please feel free to post their locations as I would be more than interested to reviewing them.
I’ve broken them down by section and “friendly” location within cf administrator.
As I find more I will update them accordingly, but at least it’s a start.
Currently in ColdFusion there are functions that easily provide regular expression functionality. These function preceed with "RE" in front of the function name (eg REFind). For those unfamiliar to regular expressions, these functions allow you to provide regular expression patterns against a provided string to help find, replace, etc complex strings.
Now I would think for most of us ColdFusion programmers we don't look any further than to use these provided functions, BUT there does come a time when you could hit a limitation on how ColdFusion interacts with the regular expression engine (eg. cannot do negative/positive look behinds). To get around this you need to work with the underlying engine itself provided in Java.
To do this you only need to do the following adjustments when running against regular expression functions:
ColdFusion example:
REReplace(strString,"for\s?\(","","all")
Underlying Java example:
strString.ReplaceAll("for\s?\(","")
It's pretty much that simple. You don't need to do a cfobject to the library or any other setup to use this feature as the string object in ColdFusion already has access to such functionality when it is initially created.
Below is a link to the matcher java class reference, which contains other possible underlying methods. I say "possible" because I have not tested them myself yet.
http://java.sun.com/docs/books/tutorial/essential/regex/
NOTE: I have tested this type of approach in a ColdFusion 6.1 environment and it works.
A bit back Brian Szoszorek showed a wonderful example on how to use Cold Fusion's gateway functionality to help streamline the use of the Trusted Cache. This article was brought to my attention by a fellow co-worker (Mike Schierberl) and after reviewing the article in detail I was stunned on how powerful this was and how easy it was to implement. So I decided to tweak it here and there to see what else it could do.
Here are the tweaks:
You can download the code here.
NOTES:
There seems to be a few bugs within the adminapi interface for clearing the cache. Currently when you attempt to remove a file from the cache after a file has been removed you receive an error stating it cannot remove it from the cache since the file does not exist on the server. To fix this we just clear the entire cache when a file is removed. Another bug is when you delete, then add the file back into the cache. For some reason it does not pick it up. To fix this we do clear cache call on the file being added. I'm not sure why this works, but it does. I will be posting this to Adobe to see what's up.
Here are the steps on how to implement:
1) Create a new directory that the component will live in and place the component in there
a. Example: C:\inetpub\wwwroot\templateListener
2) Set the cfpassword variable to reflect your cfpassword. This needs to be hardcoded within the component in order for the gateway to work properly.
3) Access and run the setEventGateway method provided within the component and provide it the directory you want to watch
a. Example: #createObject("component", "templateListener").setEventGateway(directoryToWatch="c:/inetpub/wwwroot")#
4) Turn on Template Caching within Cold Fusion Administrator by (CF Admin -> Server Settings -> Caching -> Trusted Cache)
5) Confirm that the Gateway Instance is running by (CF Admin -> Event Gateways -> Gateway Instances)
6) If you want to turn off the varScoper check then you can turn it off by adjusting the "runVarScoper" flag at the top of the component to false
4-13-2008
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4-11-2008
4-11-2008