Symfony 2 - пример реализации событийного управления

use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\Debug\Debug;
use Symfony\Component\EventDispatcher\Event;
 
 
$loader = require_once __DIR__.'/../app/bootstrap.php.cache';
Debug::enable();
 
 
$EventDispatcher = new EventDispatcher();
 
 
class TestListener
{
	public function onTestAction(Event $event)
	{
		echo $event->getValue();
	}
}
 
$TestListener = new TestListener();
 
$EventDispatcher->addListener('a1', array(
		$TestListener,
		'onTestAction'
));
 
class TestEvent extends Event
{
 
	private $value;
 
	public function setValue($value)
	{
		$this->value = $value;
	}
 
	public function getValue()
	{
		return $this->value;
	}
}
 
$event = new TestEvent();
$event->setValue('Hello world!');
 
$EventDispatcher->dispatch('a1', $event);