Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Can I open a persistent conection using cfhttp?

Posted on 2009-04-14
3
Medium Priority
?
262 Views
Last Modified: 2013-12-24
If I use cfhttp tag in coldfusion to output data from an oracle database, can I maintain a persistent connection so that when the database values change in oracle, the page is updated without refreshing the page?

If not, is there another tag that will do this?
0
Comment
Question by:steveweems
3 Comments
 
LVL 19

Expert Comment

by:Jones911
ID: 24142979
No you will have to poll.
0
 

Author Comment

by:steveweems
ID: 24143109
Can you explain polling?  Is there a coldfusion tag for that?
0
 
LVL 36

Accepted Solution

by:
SidFishes earned 500 total points
ID: 24143448
just to elaborate... an http call can never be "persistent" by designs its a get and forget method. A call to a server happens once, and then server knows nothing about later calls (session variables were invented for this reason..to maintain state)

cfhttp is doing exactly what a browser would do so therefore, it can only do what a browser can do (and less in fact as it doesn't handle javasacript or other things like flash well)

You could use cfschedule to do a cfhttp call every x minutesand but you'd still have to handle screen updates but this probably won;t do what you want

You can "simulate" a persistent connection by doing an ajax call using a JS timer and updating behind the scenes but these are distinct calls to the server/db. This is the way most screen updates are handled in the web 2.0 world but they only look like they're not hitting the server/db... they actually do.
0

Featured Post

[Webinar] Cloud and Mobile-First Strategy

Maybe you’ve fully adopted the cloud since the beginning. Or maybe you started with on-prem resources but are pursuing a “cloud and mobile first” strategy. Getting to that end state has its challenges. Discover how to build out a 100% cloud and mobile IT strategy in this webinar.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This is a guide to setting up a new WHM/cPanel Server to be used for web hosting accounts. It is intended for web hosting company administrators and dedicated server owners. For under $99 per month (considering normal rate of Big Data Cetnters like …
Meet the world's only “Transparent Cloud™” from Superb Internet Corporation. Now, you can experience firsthand a cloud platform that consistently outperforms Amazon Web Services (AWS), IBM’s Softlayer, and Microsoft’s Azure when it comes to CPU and …
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
Screencast - Getting to Know the Pipeline
Suggested Courses

926 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question