Angularjs How To Get Data From A Polling Service To A Controller

I have this service which checks if there a new data from the back end. It it working fine.But the problem is I cant get the data from the service to the controller using $watch no

Solution 1:

Probably using promise in this case is not the most convenient approach because it is not supposed to be resolved multiple times. You can try to implement poller with old plain callbacks, you can call them repeatedly without need to create new instance of the promise:

.service('notificationPollService', function ($q, $http, $timeout) {

    var notification = {};
    notification.poller = function (callback, error) {
        return $http.get('some/routes/').then(function (response) {
            if (typeof response.data === 'object') {
                callback(response.data);
            } else {
                error(response.data);
            }
            $timeout(function(){
               notification.poller(callback, error);
            }, 1000);
        });
    };

    return notification;
});

notificationPollService.poller(function(data) {
    $scope.data = data; // new data
}, function(error) {
    console.log('Error:', error);
});