What's the correct way to communicate between controllers in AngularJS? - http://cl.ly/TJVG

config.js

angular
    .module('MyApp')
    .config(['$provide', function($provide){
        $provide.decorator('$rootScope', ['$delegate', function($delegate){

            Object.defineProperty($delegate.constructor.prototype, '$onRootScope', {
                value: function(name, listener){
                    var unsubscribe = $delegate.$on(name, listener);
                    this.$on('$destroy', unsubscribe);
                },
                enumerable: false
            });


            return $delegate;
        }]);
    }]);

controller.js

angular
    .module('MyApp')
    .controller('MyController', ['$scope', function MyController($scope) {

            $scope.$onRootScope('someComponent.someCrazyEvent', function(){
                console.log('foo');
            });
        }
    ]);