http://stackoverflow.com/questions/40460330/ember-use-this-get-in-a-validation-function#40460330

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  myService: Ember.inject.service(),
  init(){
    this._super(...arguments);
    var objectValidation = {
    message: 'invalid date',
    myService: this.get('myService'),  
    validate: function(inputDate) {
      console.log(' this ',this.myService.first);      
    }
  };
    this.get('dateValidation').pushObject(objectValidation);
  },
  dateValidation: [],
  actions:{
    test(){
      console.log('test');
      var first = this.get('dateValidation').popObject();
      first.validate();
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

services.my-service.js

import Ember from 'ember';

export default Ember.Service.extend({
  first:'vara'
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{my-component }}
<br>
{{outlet}}
<br>
<br>

templates.components.my-component.hbs

<button {{action "test"}}> Test</button>
{{yield}}

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}