How do I capture the response body of a Get call and print it in a variable

I am new to gatling can anyone help me to extract the response of the get request and print it in a variable.
get response will be a json.

package io.gatling.highcharts

import scala.concurrent.duration._

import io.gatling.core.Predef._
import io.gatling.http.Predef._
import io.gatling.jdbc.Predef._

class HDASParsing extends Simulation {

 val httpProtocol = http
  .acceptEncodingHeader("gzip, deflate, sdch")
  .userAgentHeader("Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36")

  val uri1 = "[]("
 val scn = scenario("HDASParsing")
  .get("/s_Assign_Unassign_DeviceDetails.txt?get")  )


Thanks in advance

you should use something like this :