How to wait run block async request?

Question

I have a such situation:

1. Have a service 'MyService'

function getData() {

  // $timeout(function () {
  if (data) { // What to verify if data exist for not to make a request
    var defer = $q.defer();
    defer.resolve({
      data: data
    });
    return defer.promise;
  }
  // }, 0);

  return ApiWrapper.resolve('get', 'api/data'); // Just a wrapper for request, return a promise
}

2. Get request to server in run block and save response to my service 'MyService'

getData().then(function(response) {
  MyService.data = response.data;
});

3. In ui-router resolve invoke same method getData, but if data already exist, I don't want to make request to the server, I want get stored data from service. But situation is that my Controllers do same request few times while loading and app.

How to refactor MyService for make only one request to server. Or, is there any other solutions?