count the number of values returned by regex extractor in jmeter

Question

How do I count the number of samples/values returned by jmeter extractors.

I am using regex to get the list of links to a variable using regex extractor. By debug sampler shows that there many values returned. until like 9_g1

PlanLinksArray_9_g=1
PlanLinksArray_9_g0=/hix/admin/planmgmt/viewqhpdetail/gLe8eM5psNUTqo8aYXo20w
PlanLinksArray_9_g1=/hix/admin/planmgmt/viewqhpdetail/gLe8eM5psNUTqo8aYXo20w

How can i get the count of this to a variable in Jmeter??

Answer 1

You can get extracted variables count as ${PlanLinksArray_matchNr} it will hold the number of variables like:

PlanLinksArray_1
PlanLinksArray_2
PlanLinksArray_3
etc.

If you need to include match groups as well, like

PlanLinksArray_1_g
PlanLinksArray_1_g0
PlanLinksArray_1_g1
etc.

you'll have to do some scripting.

1. Add a Beanshell PostProcessor after your Regular Expression extractor

2. Put the following code into the PostProcessor's "Script" area

   JMeterVariables vars = new JMeterVariables();
   Iterator iterator = vars.getIterator();
   int counter = 0;
   while (iterator.hasNext()) {
       Map.Entry e = (Map.Entry) iterator.next();
       if (e.getKey().startsWith("PlanLinksArray")) {
           counter++;
       }
   }
   
   vars.put("extractedValues", String.valueOf(counter));
   

3. Number of variables which names start with "PlanLinksArray" will be available as ${extractedValues} variable

See How to use BeanShell: JMeter's favorite built-in component guide for more Beanshell tips and tricks.

Answer 2

AS per:

• http://jmeter.apache.org/usermanual/component_reference.html#postprocessors

it will be called:

PlanLinksArray_9_matchNr : the number of matches found; could be 0