How to save response in a variable in jmeter

Question

I am performing load testing on my server using jmeter. In one of my post requests, I receive a unique id in the response. I need to send this id as a parameter in the following

Answer 1

I know this question is old but I agree with @UBIK you should probably use a JSON extractor. I am working with a load test that is sending over 100 requests per second and I need to reuse the value in a specific JSON key, so I'm using a JSON extractor and saving the values in a .csv file to be used by the next request.

1. extract the JSON

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2. This is the Groovy script to write it to a .csv file

 def myRandomIds = new File("randomIds.csv")
    myRandomIds << vars.get("id") + ","
    myRandomIds << System.getProperty("line.separator")
    log.info(vars.get("id") + " saved to randomIds.csv...")

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3. This is the CSV data config I have set up in my other request that is reading from the csv file. (In my case these .jmx files are automated and parametized using jenkins)

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4. CSV data set config

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