Symfony 2 Services

Create a service class:
 
1) make a directory at bundle root: /Services
 
2) put a class there, e.g.
 
<?php
 
namespace Penny\HomeBundle\Services;
 
 
use Symfony\Component\Security\Core\Authentication\AuthenticationManagerInterface;
use Symfony\Component\Security\Core\SecurityContext;
 
 
 
class MySecurity
{
 
	//import security.context
	public function __construct()
	{
 
	}
 
	/**
	 * 
	 * Check which entities user
	 * can edit/delete
	 * parameter: User entity
	 */
 
	public function belongsToUser($entity, $user_id)
	{
		//$s = new SecurityContext(new AuthenticationManagerInterface());
		//$id = $s->getToken()->getUser()->getId();
		$id = $this->get('security.context')->getToken()->getUser()->getId();
		return $user_id === $entity->getUser()->getId();
	}
}
 
 
?>
 
3) change app/config/config.yml - add service class to it:
 
parameters:
    items_per_page: 8
 
services:
    my_security:
        class:        Penny\HomeBundle\Services\MySecurity
    paginated_query:
        class:        Penny\HomeBundle\Services\PaginatedQuery
        arguments:    [%items_per_page%, @security.context]
 
4) in action:
 
             //class name          //method
$this->get('paginated_query')->getResult($query, $page_num);