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Why doesn't symfony2 call my event listeners?

I have a program with two packages. One of them (CommonBundle) dispatches the event "common.add_channel", while the service on the other (FetcherBundle) had to listen to it. In the profiler, I see the common.add_channel event in the "Uninvited listeners" section. I do not understand why symfony does not register my listener.

This is my action, inside CommonBundle\Controller\ChannelController::createAction:

$dispatcher = new EventDispatcher();
$event = new AddChannelEvent($entity);        
$dispatcher->dispatch("common.add_channel", $event);

This is mine AddChannelEvent:

<?php

namespace Naroga\Reader\CommonBundle\Event;

use Symfony\Component\EventDispatcher\Event;
use Naroga\Reader\CommonBundle\Entity\Channel;

class AddChannelEvent extends Event {

    protected $_channel;

    public function __construct(Channel $channel) {
        $this->_channel = $channel;
    }

    public function getChannel() {
        return $this->_channel;
    }

}

This should have been my listener (FetcherService.php):

<?php

namespace Naroga\Reader\FetcherBundle\Service;

class FetcherService {

    public function onAddChannel(AddChannelEvent $event) {
        die("It here!");      
    }
}

And here, where I register my listener (services.yml):

kernel.listener.add_channel:
    class: Naroga\Reader\FetcherBundle\Service\FetcherService
    tags:
        - { name: kernel.event_listener, event: common.add_channel, method: onAddChannel }

What am I doing wrong? Why doesn't symfony call an event listener when sending common.add_channel?

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1 answer

, .

event_dispatcher. Framework Bundle . , Controller#get() :

// ...
use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class ChannelController extends Controller
{
    public function createAction()
    {
        $dispatcher = $this->get('event_dispatcher');
        // ...
    }
}
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