1

I have a service that gets data related to the current logged in user from the server, which internally caches the returned user object. The user service:

    var appCache = $cacheFactory.get('appCache');
    var userInfoFromCache = appCache.get('userInfo');

    if (userInfoFromCache) {
        $log.debug("User info cache hit");            
        deferred.resolve(userInfoFromCache);
    } else{
        $log.debug("User info cache miss");
        //do work and get data from server
        appCache.put('userInfo', userInfo);
    }

The service works great. I am calling the user service from multiple places on load such as top navigation and inside the home view. I also call the service in run section of app.js:

.run(function(userService) {
    userService.getUser();
})

Since I am calling the service from multiple places at once, i am ending up with multiple server calls. Is there a way I can setup a lock on the code so that subsequent calls to the userService is served by cache?

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5
  • You don't need to (and shouldn't) lock, just return the original promise if a call is already in progress. stackoverflow.com/questions/21125837/… Commented Feb 1, 2016 at 19:36
  • Awesome this helped! I was missing the check for deferred == true. Commented Feb 1, 2016 at 20:05
  • Do you mind posting as answer? I will mark yours as "the" answer. Thanks! Commented Feb 1, 2016 at 20:07
  • 1
    Tempting to collect my nerd points, but it'd basically be a duplicate answer so doesn't really seem worth preserving. Glad I could help anyway! Commented Feb 2, 2016 at 2:37
  • Possible duplicate of Avoid multiple ajax requests angularJS Commented Aug 27, 2018 at 15:33
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