Passing parameters to scenario

Gatling (Open-Source)
1

Hi folks

Hoping someone here can help me out. I’m having some trouble passing parameters to a scenario in 2.0, as outlined here: http://gatling.io/docs/2.0.0-RC2/cookbook/passing_parameters.html.

In v1.5.6 I was able to pass a parameter like this:

val iterations = Integer.getInteger(“iterations”, 20)

then pass it to a repeat in my scenario like this:

repeat(iterations)

In RC2, however, when I do this I get the following:

type mismatch;
found : Integer
required: io.gatling.core.session.Session => io.gatling.core.validation.Validation[Int]

Is there a correct way to create the Map the error is asking for, or is there a different way of passing the parameter in 2.0 that I’m missing?

Similarly, the example in the docs shows a Long being passed to ‘rampUsers() over()’, but it appears that now a FiniteDuration has to be passed, so it seems like the way the values in the scenario are parsed has changed.

Thanks in advance for any advice!

2

Hi Alex,

Since the number of iterations does not depend on the user’s session’s content, you can use :

`
val iterations = Integer.getInteger(“iterations”, 20).toInt // Convert it to a Scala integer

repeat(_ => iterations) {
…
}
`

To make it work.

rampUsers(…) over (…) takes :

  • An Int for the rampUsers(…) parameter
  • A FiniteDuration for the over(…) parameter
    However, there are automatic conversions from java.lang.Integer to both types, so that you can write :

rampUsers(Integer.getInteger("usersRamp") over (Integer.getInteger("rampTime").seconds)

Hope this helps !

Cheers,

Pierre

3

After checking, my example for repeat is overly complicated: as long as iterations is a Scala Int (meaning you call toInt on it), you can do :

repeat(iterations) {
…
}

4

Awesome! Thanks =)