How to configure JMeter token to be called only once?

In order to ensure that JMeter’s token is only called once, you can utilize the JSR223 PreProcessor in JMeter’s PreProcessor component.

Here is one possible approach:

1. Add an HTTP request to fetch the token.
2. Add a JSR223 PreProcessor component below this HTTP request.
3. Select the appropriate script language (such as Groovy or JavaScript) in the JSR223 PreProcessor component.
4. Use a flag variable in the script to check if the token has been called before.
5. If the token has been invoked, then set a variable (such as “tokenCalled”) to true.
6. Add a condition to the HTTP request to determine whether to make a token request. This condition can be implemented using JMeter’s If Controller.
7. Add a condition in the If Controller to check if the flag variable “tokenCalled” is false.
8. If “tokenCalled” is false, then execute the token request.
9. In the JSR223 PreProcessor component, set “tokenCalled” to true so that token requests will not be called again during the next run.

In this way, JMeter will set the flag variable to true after the first call to the token request, thus avoiding subsequent calls to the token request.