Wait a while before checking websocket messages / not catching the first message after subscribing on a topic

Gatling (Open-Source)
1

I am currently testing a websocket that will show a lot of messages. the problem I am having is that every thread will catch the first message on the websocket and to be fair I really don’t want to catch the first one either.

The output of the socket is a stream of jsonObjects. Preferably each thread would select a random incoming jsonObject and do my validations on them.

Is there anyway to this?

My current setup is as follows:

.exec(ws("Connect WS")
  .connect(wsPath+"${JWTtoken}")
)
  .pause(1,5)
  .repeat(1,"n") {
    exec(ws("subscribe to topic")
      .sendText("""{"subscription":{"something":["something","completed"],"operation":null}}""")
      .await(10 seconds)(
        ws.checkTextMessage("checkTopic").check(
          regex(".*\"type\":\"Feature\".*"),
          jsonPath("$.properties.id").saveAs("Id")
        )
      ))
      .exec(session => {
        Id = session("Id").as[String].trim
        println("%%%%%%%%%%% ID ===>>>>> " + Id)
        session
      }
      )
  }

Thanks in advance.

Kind regards.