JMeter regex extractor forEach controller

Question

I'm creating some tests with JMeter, the situation is very simple, I have a search page with a list of results, and I have to retrieve from this results some values to use in the next request. Those results are around 350, I don't need them all.

I used the RegexExtractor to retrieve those results and it works (I setted it to retrieve just 10 results), but now I don't know how to access the results inside a LoopCounter. The extractor put the results into a variable named Result.

The problem is that I don't know hot to build dinamically the name of a variable. Do I have to use some function like _p()?? I can access the variable just putting the static name Result_0_g1

Inside the LoopCounter I putted also a Counter to store the loop count into the variable index

Thank you

EDIT:

SOLVED I have to write:

${__V(Result_${index}_g1)

The solution given here by the OP might work in context but it won't handle no matches on the regex and is generally needlessly complicated in comparison to jmeter's built-in solution. — Oliver Lloyd
– Oliver Lloyd, Commented May 14, 2012 at 11:38
...You can post your solution as answer and accept it to close the issue - if you believe it's solved. — Aliaksandr Belik
– Aliaksandr Belik, Commented May 14, 2012 at 12:02
mm which are the built-in solution in this case? I've tried with the ForEach controller but it doesn't seem work — rascio
– rascio, Commented May 14, 2012 at 12:29

rascio · Accepted Answer · 2012-05-15 08:50:39Z

5

You have to reference the variable with the function:

${__V(Result_${index}_g1)

answered May 15, 2012 at 8:50

rascio

9,32920 gold badges74 silver badges113 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Aliaksandr Belik Over a year ago

You need in this case not ${__V(Result_${index}_g1) but ${__V(Result_g${index}}: if there are more than one match jmeter will generate specific variables for each match, based on the variable name to which you are trying to extract - in your case Result_g0, Result_g1, ..., Result_gN. Look into this: stackoverflow.com/q/10626762/993246.

Aliaksandr Belik · Accepted Answer · 2012-05-18 15:46:09Z

...Just for collection.
See also this post for another implementation (case without using ForEach Controller):

ThreadGroup HttpSampler Regex Extractor (variableName = links) WhileController(${__javaScript(${C} < ${links_matchNr})}) HTTPSampler use ${__V(links_${C})} to access the current result Counter (start=1, increment=1, maximum=${links_matchNr}, referenceName=C)

Oliver Lloyd · Accepted Answer · 2012-05-14 11:16:13Z

0

Use the ForEach Controller - it's specifically designed for this purpose and does exactly what you want.

answered May 14, 2012 at 11:16

Oliver Lloyd

5,0247 gold badges37 silver badges55 bronze badges

2 Comments

rascio Over a year ago

It seems that the ForEach controller don't work if I put the Match No. in the regex extractor...The problem is that I want to retrieve just the first 10 results

Oliver Lloyd Over a year ago

Use a match number of -1, this returns all matches and creates the groups, then you can simply limit the foreach to 10 iterations using a counter. Quote from help text: "the ForEach Controller can be used to loop through the groups by using the input variable refName_g, and can also loop through all the groups in all the matches by using an input variable of the form refName_${C}_g, where C is a counter variable. "

Aliaksandr Belik · Accepted Answer · 2017-09-18 12:11:49Z

You may use ForEach Controller:

ThreadGroup YourSampler Regular Expression Extractor (match -1, any template) Foreach controller Counter(Maximum -> ${Result_matchNr} , Rf Name -> index) LinkSamplerUsingParsedData(use -> ${__V(Result_${index}_g1)}

Now, if you want to iterate to all groups, you need another foreach to do that. As you know which group represent what value, you can use this way.

Collectives™ on Stack Overflow

JMeter regex extractor forEach controller

4 Answers 4

1 Comment

Comments

2 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

Comments

2 Comments

Comments

Linked

Related