Symfony 3 use a second database in service - doctrine-orm

Question

I try to manage 2 databases in my symfony3 installation.
I want to have two connections and not two managers because the second database is just for loading external data and not to use with the orm.
my conf.yml
doctrine:
dbal:
default_connection: default
connections:
default:
driver: pdo_mysql
host: "%database_host%"
port: "%database_port%"
dbname: "%database_name%"
user: "%database_user%"
password: "%database_password%"
charset: UTF8
dbsync:
driver: pdo_mysql
host: "%database_sync_host%"
port: "%database_sync_port%"
dbname: "%database_sync_name%"
user: "%database_sync_user%"
password: "%database_sync_password%"
charset: UTF8
orm:
auto_generate_proxy_classes: "%kernel.debug%"
naming_strategy: doctrine.orm.naming_strategy.underscore
auto_mapping: true
In a Controller i can use my second database for sql select with :
...->getManager()->getConnection('dbsync');
But I would like to use it in a service and I don't know how to use getConnection('dbsync') in this case ...
my service MajUsers.php
<?php
namespace EntBundle\Service;
use Doctrine\ORM\EntityManager;
use EntBundle\Entity\User\User;
class MajUsers {
private $em;
/**
* #param EntityManager $em
*/
public function __construct(EntityManager $em)
{
$this->em = $em;
}
public function runUpdate()
{
$conn = $this->em->getManager('dbsync')->getConnection('dbsync');
$personnels_sync = $conn->fetchAll("SELECT * FROM xxxxx WHERE etat = 1 AND login !='' ORDER BY xxx, yyyyLIMIT 10");
.....
.....
}
}
my service.yml
ent.maj_users:
class: EntBundle\Service\MajUsers
arguments:
- '#doctrine.orm.entity_manager'
I use the em for some repository in my code and it's working fine but the getConnection('dbsync') part is not working.
I suppose that I need to inject a container (doctrine?) in the __construct but I don't know witch one, all my test failed :c/
Thanks for any help

Answer 1

UPDATED:
In your __construct type hint against \Doctrine\DBAL\Connection and define service like follows:
ent.maj_users:
class: EntBundle\Service\MajUsers
arguments:
- '#doctrine.dbal.dbsync_connection'
Thanks to #Cerad for pointing out my mistake
OLD:
You can find it in docs here
Basically, you should define service like this:
ent.maj_users:
class: EntBundle\Service\MajUsers
arguments:
- '#doctrine.orm.dbsync_entity_manager'