Transition Hook?

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams:['foo'],
  foo: '',
  transitionCount: 0,
});

application.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams: {
    foo: {refreshModel: true},
  },
  model() {
    let model = this.controllerFor('application').get('model') ||  Ember.Object.create();

    model.set('count', model.getWithDefault('count', -1) + 1);
    return model;
  },
  actions: {
    willTransition() {
      let controller = this.controllerFor('application');
      controller.set('transitionCount', controller.get('transitionCount') + 1);
    },
  },
});

application.template.hbs

<div>
 model count: {{model.count}}
</div>
<div>
  transition count: {{transitionCount}}
</div>
{{#link-to 'index' (query-params foo='bar') }}clickme{{/link-to}}

twiddle.json

{
  "version": "0.6.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.3.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}