Gatling > Parse Expression Language string

ElParser.scala

package util

import io.gatling.core.session._

object ElParser {

  def apply[T](expression: Expression[T], session: Session): T = toOption(expression, session).get

  def toOption[T](expression: Expression[T], session: Session): Option[T] = expression(session).toOption
}

// usage
val expression: Expression[String] = "#{sessionId}"
val sessionId = ElParser(expression, session)

// type hinting
val userId = ElParser[String]("#{userId}", session)
val userData = ElParser[Map[String, Any]]("#{userData}", session)