title: Does EmberJs support publish/subscriber eventing pattern?
body: <p>I'm recently evaluating a JavaScript framework to be used for our next project. I really like Ember. But in our application, we would need an eventing mechanism from the data layer to notify the controller layer that something has changed. I know one could use obersevers in Ember, for example,:</p>
  
  <pre><code>person.addObserver('fullName', function() {
    // deal with the change
  });
  </code></pre>
  
  <p>But I like more in Backbone.Events that you could subscribe or publish an event, specifically:</p>
  
  <pre><code>var object = {};
  
  _.extend(object, Backbone.Events);
  
  object.on("alert", function(msg) {
    alert("Triggered " + msg);
  });
  
  object.trigger("alert", "an event");
  </code></pre>
  
  <p>Anybody has an idea whether that's doable in EmberJS?</p>
  
  <p>To also give you some background about my question, our application is a real-time application. So from time to time, the backend RESTful service will fire an event to the client side (JavaScript side). I would like to have a data layer which encapsulate the access to the backend RESTful service, but also keeps a cache. I hope EmberJS.Data could help me with that (that's a separate question I want to find answers). With that, I would like also the cache to be updated whenever a change happened from the backend RESTful service. Once the cache object is updated, I would like the Controller layer to be notified. This is basically why I need some eventing mechanism in JavaScript side.</p>
  
  <p>Note that the reason I don't want to use the Observers is that sometimes, an event could mean I have to perform an action, i.e. load up a message, or indicate that a voice call is coming. The backbone way seems more natuarl to me.</p>
  
  <p>Thanks</p>