How to handle multiple matches of extractors in jmeter

Question

I have used json path extractor to find multiple matches from a json response. and got output:

IDType_Extract_1={"contentType":"LIVE","id":103}
IDType_Extract_2={"contentType":"CATCH_UP","id":6441631}
IDType_Extract_3={"contentType":"MOVIES","id":129}

Now, i want to split these two values and pass any random (contentType,id) pair in next jmeter http request.

Which postprocessor should i use and how to extract values.

I was using beanshell assertion and beanshell postprocessor but not able to extract it.

string[] value = vars.get{"IDType_Extract_1"};

  string[] type = value.split{","};

In debug sampler, no value is coming in variables.

Dmitri T Dmitri T · Accepted Answer · 2019-09-20T08:46:04

Your syntax is not correct, it should be

string[] value = vars.get("IDType_Extract_1");
Your approach is not correct, since JMeter 3.1 you should be using JSR223 Test Elements and Groovy language for scripting and Groovy provides JsonSlurper class which is handy for parsing JSON.

Assuming all above

Add JSR223 PreProcessor as a child of the request you want to parameterize

Put the following code into "Script" area:

def randomNumber = org.apache.commons.lang3.RandomUtils.nextInt(1, (vars.get('IDType_Extract_matchNr') as int) + 1)
def entry = new groovy.json.JsonSlurper().parseText(vars.get('IDType_Extract_' + randomNumber))
vars.put('contentType', entry.contentType)
vars.put('id', entry.id as String)

That's it, refer the random extracted values as ${contentType} and ${id} where required:

Demo:

More information:

How to handle multiple matches of extractors in jmeter

2 Answers