Ionic refresh $http

I’m stuck here and i really need help.

I’m using many separated factories and controllers because i need them separated but, how can i invoke controller from ionic-refresh directive.
Example, i have this factory:

.factory('dataTest', function($http){
   return {
get: function(){
  return $http.get('http://get')

and controller:

 .controller('testCtrl',['$scope', 'dataTest',
   function ($scope, currentSea){

Now how can i refresh data with ionic? Which by the way shoud refresh other 3 diffrenet controllers.

Thanks in advance.