Passing Values to Multiple Files in Gatling - scala

Question

I am designing a software test using Gatling for my company's web based application. After many iterations, I have come to a design that I believe will make it easy for testers at my company to easily change parameters as needed, but it is quite complex. The main file which contains the scenario, setup, and simulation calls is all contained in one file that then connects to a different file via methods for each of the other functions we are testing.
My problem is when logging into our API with a request, using one of the function files, it sends a response that includes a session token. It is important that I am able to pass the value of that token back to the main file, so that I can use it as a parameter in other function methods. I am having a problem passing the actual value of this token to the main file.
Here is the sample code for the method:
object BasicLogin {
def login ( hostparam:String, controlparam:String, usernameparam:String, passwordparam:String) : (ChainBuilder, String) = {
val user = usernameparam
val password = passwordparam
val host = hostparam
val controlid = controlparam
val logintype = "user"
val jsonrequest = """{"logintype":"""" + logintype + """",
"controlid":"""" + controlid + """",
"user":"""" + user + """",
"password":"""" + password + """",
"host":"""" + host + """"
}"""
val loginChain = exec(http("Login")
.post("sample.url.com")
.body(StringBody(jsonrequest))
.asJSON
.check(jsonPath("$..result").is("true"))
.check(jsonPath("$..session")
.find
.saveAs("currentSession")))
val accessToken: String = exec(session => {
val sessionid = session("currentSession").as[String]
println("token: " + sessionid)
session })
.toString
return (loginChain, accessToken)
}
}
Here is my code calling the method for login:
val host = "IPaddress"
val controlid = "IDcontroller"
val username = "JDoe"
val password = "TerriblePassword"
val result = BasicLogin.login(host, controlid, username, password)
val basiclogin:ChainBuilder = result._1
val currentSession:String = result._2
println("Session: " + currentSession)
println("Login: " + basiclogin)
And here is what I get in response:
Session: ChainBuilder(List(io.gatling.core.action.builder.SessionHookBuilder#6f70f32f))
Login: ChainBuilder(List(io.gatling.http.action.sync.HttpRequestActionBuilder#3dd69f5a))
I have searched in many different places, and have not found much in terms of similar issues. I know Gatling is run in multi-cast, and not sure if this is even possible. I have utilized the save as method, and tried calling the value using Gatling DSL, but no luck. I originally was trying to use just values without methods, but that failed miserably. I have also tried the set method and mapping, but neither of these worked either.
So now I am trying to get a value from the response, and return it back to the main file using the method. It runs, but it returns the chainbuilder.
Any advice?
Rob