How to Store multiple id from one request and retrieve few id for update within the same thread group in jmeter?

Question

My Scenario. [ All are in Same Thread group] I have to Create Cart, Add Multiple Items(5), Update few items(1) and then checkout.

Add Items - I have to add 5 Items [ Each Item will generate unique Item ID] Using For Loop to add 5 times and capture the Item ID value using JSON Extractor. Variable Name= C_Item_ID

JSON Path Expression= $.items[0].id

In JSR223 Postprocessor, i having the below code

def count_value= vars.get("cnt").toInteger(); //convert to int type

For each loop iteration i am capturing the Item ID and store it different variable

switch (count_value) {

     case 1:

       def C_Item_ID_1 = vars.get("C_Item_ID");

       vars.put("C_Item_ID_1",C_Item_ID_1);

       break;

       etc....
   }

Update Item - I need to passing the unique Item ID here.

ex. xxx-service-xxx/cart/1234567890/items/${C_Item_ID_1}

When i reply "${C_Item_ID_1}" value is not getting here.

Not sure what is wrong on this? Any help?

Answer 1

After multiple tries the below solution working fine and successfully executed the method and getting correct response.

${__groovy(vars.get("item_value_1"),)}

Thank you all for the support.

Answer 2

Your Groovy code is more or less fine and it should be doing what it is supposed to be doing:

Most probably the issue is with either cnt variable or C_Item_ID variable or both, double check that they have the expected values using Debug Sampler and View Results Tree listener combination. You should see something like:

It also worth checking jmeter.log file for any suspicious entries.