JMeter: How to change user defined variable value for second iteration of loop count

jmeter
DanzerZoneJS picture DanzerZoneJS · Sep 25, 2014 · Viewed 20.6k times · Source

I'm running a Thread Group with the following property values:

Number of threads: 200 Ramp-up Time (sec): 20 Loop-count: 2

I also have user defined variables set for the HTTP Requests. However, when the second iteration is reached, I need the user defined variable's value to also change.

Answer

Dmitri T picture Dmitri T · Sep 25, 2014
  1. Add a Beanshell PreProcessor as a child of first request

  2. Put the following code into PreProcessor's "Script" area:

    if (vars.getIteration() == 2) {
    vars.put("myVar", "newValue");
}

  3. Replace myVar with your variable name and newValue with variable value for the second loop.

vars is a shorthand for JMeterVariables class instance and getIteration() method returns current loop's number.

If you want to dive deaper into Beanshell in particular and extending JMeter test via scripting in general I would recommend to get familiarized with How to use BeanShell: JMeter's favorite built-in component guide.

Related questions

How do I install jmeter on a Mac?

We want to use JMeter. I've downloaded the production version as directed in the user manual at http://jmeter.apache.org/usermanual/get-started.html But how do I get started and install the software? I don't know java and I …

Read More
How to analyze a JMeter summary report?

I get the following result when I run a load test. Can any one help me to read the report? the number of thread = '500 ' ramp up period = '1' Sample = '500' Avg = '20917' min = '820' …

Read More
Jmeter - get current date and time

I want to get the current date and time as example date: 11/10/2014 and time 8:30 am or 6:00 pm and pass it as parameters to my Jmeter test. Can some help me do this.

Read More