Inject User Specific Data - mathieuboniface/gatling GitHub Wiki

As explained in the documentation, a Feeder is shared amongst all users.

So, what if one want to inject user specific data?

Rest assured, this can be achieve programmatically, with the support of Gatling built-ins:

• csv and the likes are actually parsers that produce Map[String, String] (they are implicitly or explicitly converted into Feeders with the .queue method and the likes).
• foreach can be used to looping onto a Sequence session attribute

In the following example, we assume that:

• the credential.csv file contains 2 columns named username and password
• the documents.csv file contains document records indexed by a column named username. This way, we intend to have every user picks its specific records.
• the documents.csv file contains at least one record per user

// use the default/implicit queue strategy
val credentials = csv("credentials.csv")

// group the document records by username
val documents = csv("documents.csv").groupBy(_("username"))

// inject into the Session the documents specific to the user
val injectUserDocuments = (session: Session) => {
  val username: String = session.getTypedAttribute("username")
  session.setAttribute("documents", documents(username).toSeq)
}

// inject the record as separate attributes into the Session
val injectDocumentData = (session: Session) => {
  val documentData: Map[String, String] = session.getTypedAttribute("document")
  session.setAttributes(documentData)
}

val scn = scenario("Sample")
  // inject credentials into the user Session
  .feed(credentials)
  .exec(injectUserDocuments)
  // loop on the documents and store the current document record
  .foreach("documents", "document") {
    exec(injectDocumentData)
    ... // do work with the document data
  }