How to get gatling simulations with changing random values in it

Question

Gatling reads the scenario at the start of the simulation and then executes it several times with the same configuration/values.

How is it possible, for example, to execute each request with the following value "RANDOM-VALUE", always with a new random value?

val postRandomValue = scenario("Post Random Value")
    .exec(
      http("POST ShipmentList")
        .post("http://localhost:8080/endpoint") // Local
        .headers(Headers.header)
        .body(StringBody("myRandomValue: RANDOM-VALUE")))

Answer 1

Feeders will help here

val postRandomValue = scenario("Post Random Value")
.feed(Iterator.continually(Map(
  "RANDOM_VALUE" -> java.util.UUID.randomUUID.toString
)))
.exec(
  http("POST ShipmentList")
    .post("http://localhost:8080/endpoint") // Local
    .headers(Headers.header)
    .body(StringBody("myRandomValue: ${RANDOM_VALUE}")))