Service DependencyInjection in Symfony2

Question

I needed to move my model from the controller method, so I got help to change it to a service. The service by itself works, but I need to be able to connect to doctrine and the kernel from inside of this service. At first I tried to enable doctrine, but that created problems. How can I make this work? I've followed docs and got this code. I have no idea why I got the error below. Thank you for your help in advance.

My config is:

CSVImport.php

namespace Tools\TFIBundle\Model;

use Doctrine\ORM\EntityManager;

class CSVImport  {
    protected $em;

    public function __construct( EntityManager $em ) {
        $this->em = $em;
    }

app/config/config.yml

services:
    csvimport:
        class: Tools\TFIBundle\Model\CSVImport
        arguments: [ @doctrine.orm.entity_manager ]

action in controller

$cvsimport = $this->get('csvimport');

MY ERROR

Catchable Fatal Error: Argument 1 passed to 
Tools\TFIBundle\Model\CSVImport::__construct() must be an instance of 
Doctrine\ORM\EntityManager, none given, called in 
.../Tools/TFIBundle/Controller/DefaultController.php on line 58 and defined in 
.../Tools/TFIBundle/Model/CSVImport.php line 12

EDIT, my working code:

service class code with Kernel attached to it

namespace Tools\TFIBundle\Model;

use Doctrine\ORM\EntityManager,
    AppKernel;

class CSVImport {
    protected $em;
    protected $kernel;
    protected $cacheDir;

    public function __construct( EntityManager $em, AppKernel $k ) {
        $this->em = $em;
        $this->kernel = $k;
}

Answer 1

Try injecting @doctrine.orm.default_entity_manager.