How to use a pre-defined Scripted Extension Point

[Andrew Bettcher]

I need to change the timeout value for the Walk-up Experience kiosks. This KB says that I can add a new system property and refer to it in the WalkUpUtil BUT, the WalkUpUtil is protected so I can't change it.

A colleague referred me to scripted extension points and when I looked, there is already one there called sn_walkup.WalkUpUtil.

I'm a little out of my depth but I think I can simply use this to achieve my requirement but I don't really know what to do. The extension point has this code in it:

	getSessionTimeoutInterval: function() {
		//Returns {number} timeout - Half the system session timeout value formatted in milliseconds.
	},

So, do I simply copy the corresponding code from the script include and change the system property name (after adding my custom property)?

If I'm right, it would look like this:
 

getSessionTimeoutInterval: function() {
	//Returns {number} timeout - Half the system session timeout value formatted in milliseconds.
sessionTimeout = gs.getProperty('MY_NEW_PROPERTY', DEFAULT_TIMEOUT);
},

For some reason the WalkUpUtil halves the value (?) so I need to remember to double it so I get my full timeout but, will that work? It's kind of hard to test without waiting for it to time out and the proposed value is 10 hours!!

[-O-]

I don't know why that KB suggests creating an extension point as the WalkUpUtil script include does not offer the possibility to overwrite/extend the function the reads the OOB property.

But why don't you just modify the OOB property?

[Andrew Bettcher]

This would change the timeout across the entire system. We only want the walk-up application to have a 10 hour timeout.

It seems weird that ServiceNow would recommend something in a KB that isn't possible and also that they'd create a default extension point that can't be used.

[-O- · Accepted solution]

Extension points are used, just not for/in the getSessionTimeoutInterval function.