How to increment the body of the payload in jmeter

Question

{
  "productIds" : 
[
    "p1": "value1"
  ]
}

{
  "productIds" : 
[
    "p1": "value2"
  ]
}

{
  "productIds" : 
[
    "p1": "value3"
  ]
}

i want the above data part to be saved in a variable and to be printed for 1000 times in the payload with p1 having dynamic value for every part,.

Answer 1

Either use Counter configuration element or __counter() function instead of 1 hard-coded value:

 { "productIds" : [ "p1": "value${__counter(FALSE,)}" ] }

Demo:

More information: How to Use a Counter in a JMeter Test