Component + Service Example

components.message-user.js

import Ember from 'ember';

export default Ember.Component.extend({
  user: null,
  messenger: Ember.inject.service(),
  
  message: '',
  
  displayName: Ember.computed(
    'user.title', 'user.firstName', 'user.lastName', function() {
    let title = this.get('user.title'),
        firstName = this.get('user.firstName'),
        lastName = this.get('user.lastName');
      
    return `${title}. ${firstName} ${lastName}`;
  }),

  actions: {
    sendMessage(msg) {
      let message = this.get('message'),
          user = this.get('user');

      this.get('messenger').sendMessage(message, user);
      this.set('message', '');
    }
  }
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  this.route('userList');
});

export default Router;

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  beforeModel() {
    this.transitionTo('userList');
  }
});

routes.user-list.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return [
      { title: 'Mr', firstName: 'Adam', lastName: 'West' },
      { title: 'Mrs', firstName: 'Linda', lastName: 'Carter' },
      { title: 'Mr', firstName: 'Christopher', lastName: 'Reeve' },
    ];
  }
});

services.messenger.js

import Ember from 'ember';

export default Ember.Service.extend({
  sendMessage(message, user) {
    window.alert(`Message: ${message}`);
  }
});

templates.application.hbs

<h1>Welcome to Message User</h1>
<br>
<br>
{{outlet}}
<br>
<br>

templates.components.message-user.hbs

{{yield this}}

templates.user-list.hbs

{{#each model as |user|}}
  {{#message-user user=user as |messageUser|}}
    <label>Name: </label><span>{{messageUser.displayName}}</span>
    <br>
    {{input value=messageUser.message}}
    <button {{action "sendMessage" target=messageUser}}>Send Message</button>
    <br><br>
  {{/message-user}}
{{/each}}

twiddle.json

{
  "version": "0.4.17",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}