EC orchestration

controllers.application.js

import Ember from 'ember';
import {task, timeout} from 'ember-concurrency';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  inputValue: 0,
  numProcessed: 0,
  
  onValueChange: Ember.observer("inputValue", function(){
    this.get("processSoon").perform(this.get("inputValue"));
  }),
  
  longRunningTask: task(function*(value){
    yield timeout(2000); //simulate a long operation
    this.incrementProperty("numProcessed", 1);
    return value;
  }).drop(),
  
  processSoon: task(function*(value){
    yield timeout(500); //debounce
    yield this.get("longRunningTask").perform(value);
  }).restartable()
  
  
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<button onclick={{action (mut inputValue) (add inputValue 1)}}>Clicks {{inputValue}}</button>
<br>
{{#if longRunningTask.isRunning}}
<h2>Running Long Process...</h2>
{{/if}}
{{#if longRunningTask.lastSuccessful}}
<h3>Processed {{numProcessed}} {{if (eq numProcessed 1) "click" "clicks"}}: (click #{{longRunningTask.lastSuccessful.value}})</h3>
{{/if}}
<br>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1",
    "ember-concurrency": "0.7.19",
    "ember-math-helpers": "2.0.5",
    "ember-truth-helpers": "1.3.0"
  }
}