Gatling - dynamic feed selection

Question

Here is what I NEED to do:

.feed(\"users.csv\") // includes username, password, groupid
// login...
.duration(x) {
    feed( csv(\"${groupid}.csv\")         


        

Answer 1

Thanks to Stephane for the information, on which the final solution was built.

Here is what I did that works for 1.5.5:

object Data {

  var groupList : List[Int] = List( ... ) // long list of IDs

  def branchByGroup ( path: String ) : ChainBuilder = {
    var c = bootstrap
    groupList.foreach( x => {
      c = c.doIf( "${groupId}", x.toString() ) {
        feed( csv( path + "/" + x.toString() + ".csv" ).random )
      }
    })
    return c
  }

  def searchCriteria () : ChainBuilder = branchByGroup( "search" )
  def other() : ChainBuilder = branchByGroup( "other" )
}

Then, inside my scenario, I call it, like so:

def scn = scenario("My Scenario")
            .feed( credentialSource )
            .exec( Login.steps )
            .during( loopTime ) {
                Data.searchCriteria()
                .exec( Search.steps )

The call to Data.searchCriteria is injecting the .doIf() calls into the chain. If it was not the first thing in the block, I would have had to wrap it in .exec() of course.

As a side-note, there was a gotcha that I had to figure out. Notice the part that says c = c.doIf - the function needs to return the END of the chain, as opposed to the beginning. You can't build a chain by attaching everything to the first link in the chain! Simulating what the DSL does requires this call-and-assign approach.

Hope this helps someone other than just me. :)