mycontroller.js

(function () {

    'use strict';

    function MyController($scope, vendrMyResource, vendrRouteCache)
    {
        vendrRouteCache.getOrFetch("currentThing", () => vendrMyResource.getMyThing()).then(function (thing) {
            // TODO: Handle my thing
            console.log(thing);
        });
    }

    angular.module('vendr').controller('Vendr.Controllers.MyController', MyController);

}());

vendrroutecache.service.js

(function () {

    'use strict';

    var cache = new Map();

    function vendrRouteCache($rootScope, $q) {

        var api = {

            getOrFetch: function (key, action) {
                if (!cache.has(key)) {
                    cache.set(key, action().then(function (data) {
                        cache.set(key, data);
                        return data;
                    }));
                }
                return $q.when(cache.get(key));
            },

            get: function (key) {
                return $q.when(cache.has(key) ? cache.get(key) : null);
            },

            clearAll: function () {
                cache.clear();
            }

        };

        $rootScope.$on('$routeChangeSuccess', function (event, current, previous) {
            api.clearAll();
        });

        return api;

    };

    angular.module('vendr.services').factory('vendrRouteCache', vendrRouteCache);

}());