topic Re: regex in Dynatrace to grab last item from /item1/item2/last_item in Open Q&A

regex in Dynatrace to grab last item from /item1/item2/last_item

henk_stobbe — Thu, 21 Jul 2022 13:38:53 GMT

Hello,

Without getting greedy (-; who knows how to solve below,

/item1/item2/last_item should transform to last_item

Who can solve this, non greedy (and yes I know it is a lame joke)

KR Henk

Re: regex in Dynatrace to grab last item from /item1/item2/last_item

Julius_Loman — Thu, 21 Jul 2022 13:06:34 GMT

The following should work, does it?

/([^/]*+)$

Re: regex in Dynatrace to grab last item from /item1/item2/last_item

henk_stobbe — Thu, 21 Jul 2022 14:11:58 GMT

Hi Julius,

(you missed an escape so change to ([^\/]*+)$ )

"Dynatrace says to expensive!" but after a lot of tries it seems that the solution is super simple,

(when you see it (-;)

[a-z,A-Z]+$ (or a variation of course)

KR Henk

Re: regex in Dynatrace to grab last item from /item1/item2/last_item

Julius_Loman — Thu, 21 Jul 2022 15:32:00 GMT

No, my regex ix fine I think. You need to specify the head / as without it it's expensive. Also it depends on where within Dynatrace you are using it.
It works for the request naming rules (using the aaa placeholder):

RUM has different regex limits, so it's better to ask where you need it exactly.

Re: regex in Dynatrace to grab last item from /item1/item2/last_item

henk_stobbe — Tue, 26 Jul 2022 11:38:52 GMT

Hello Julius,

Customer was using regex in calculated metric, so you are right yours works perfect.

(except in calculated metric than mine is better (-;)

And yes I know that is very deep (-;

Thank for your reaction!

KR Henk