CODEWITHSUNDEEP
load-testinggatling
Bittrance
Bittrance

Reputation: 2260

Making a variable number of parallel HTTP requests with Gatling?

I am trying to model a server-to-server REST API interaction in Gatling 2.2.0. There are several interactions of the type "request a list and then request all items on the list at in parallel", but I can't seem to model this in Gatling. Code so far:

def groupBy(dimensions: Seq[String], metric: String) = {
  http("group by")
    .post(endpoint)
    .body(...).asJSON
    .check(
      ...
      .saveAs("events")
    )
}

scenario("Dashboard scenario")
  .exec(groupBy(dimensions, metric)
    .resources(
      // a http() for each item in session("events"), plz 
    )
  )

I have gotten as far as figuring out that parallel requests are performed by .resources(), but I don't understand how to generate a list of requests to feed it. Any input is appreciated.

Upvotes: 3

Views: 4543

Answers (2)

user666
user666

Reputation: 1172

Not very sure of your query but seems like you need to send parallel request which can be done by setUp(scenorio.inject(atOnceUsers(NO_OF_USERS)));

Refer this https://docs.gatling.io/reference/script/core/simulation/#setup

Upvotes: 0

Alexey Novakov
Alexey Novakov

Reputation: 754

Below approach is working for me. Seq of HttpRequestBuilder will be executed concurrently: 

val numberOfParallelReq = 1000

val scn = scenario("Some scenario")
  .exec(
    http("first request")
      .post(url)
      .resources(parallelRequests: _*)
      .body(StringBody(firstReqBody))
      .check(status.is(200))
  )

def parallelRequests: Seq[HttpRequestBuilder] =
  (0 until numberOfParallelReq).map(i => generatePageRequest(i))

def generatePageRequest(id: Int): HttpRequestBuilder = {

  val body = "Your request body here...."

  http("page")
    .post(url)
    .body(StringBody(body))
    .check(status.is(200))
}

Upvotes: 2

Related Questions