加特林没有在会话中存储价值 [英] Gatling not storing value in session

问题描述

我正在使用会话进行加特林存储值，如下所示

I am using sessions in gatling to store values, as shown below

      exec(session => {
        val id = Instant.now.toEpochMilli.toString + scala.util.Random.nextInt(1000).toString
        session.set("STARTED_PROCESS_ID",id)
        //Store the id somewhere for processing later
        session
      })
      .exec(
          http("scenario")
            .post(url)
            .header("Content-Type", "application/json")
            .header("id", session => session("STARTED_PROCESS_ID").as[String])
            .body(StringBody(body)
            .check(status.is(200))

根据文档，该值应存储在会话&标头"id"应按预期填充.但是当运行模拟时，出现以下错误

According to the documentation, the value should be stored in session & the header "id" should be populated as expected. But when running the simuation I get the following error

java.util.NoSuchElementException: No attribute named 'STARTED_PROCESS_ID' is defined
    at io.gatling.core.session.SessionAttribute.as(Session.scala:46)
    at common.HttpUtil$.$anonfun$sendPostRequestForWasStartDefLoad$1(HttpUtil.scala:557)
    at io.gatling.core.action.SessionHook.execute(SessionHook.scala:32)
    at io.gatling.core.action.Action.$bang(Action.scala:38)
    at io.gatling.core.action.Action.$bang$(Action.scala:38)

有人可以帮忙解释一下为什么会发生这种情况吗?

Can someone please help explain why is this happening ?

推荐答案

您没有正确使用Session API.请正确阅读文档.

You're not using the Session API correctly. Please properly read the documentation.

Session 是不可变的，并且 set 返回一个新实例.

Session is immutable and set returns a new instance.

exec { session =>
    val id = Instant.now.toEpochMilli.toString + scala.util.Random.nextInt(1000).toString
    session.set("STARTED_PROCESS_ID",id)
}

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