Dynamic settings injection 3/4, as of eZ 5.4 / 2014.09 - Constructor injection

0 - services.yml

parameters:
    acme_test.my_service.class: Acme\TestBundle\MyServiceClass

services:
    acme_test.my_service:
        class: %acme_test.my_service.class%
        arguments: ["$languages$", "$content.tree_root.location_id$"]

01 - MyServiceClass.php

<?php
namespace Acme\TestBundle;

class MyServiceClass
{
    /**
     * Prioritized languages
     *
     * @var array
     */
    private $languages;

    /**
     * @var int
     */
    private $rootLocationId;

    public function __construct( array $languages, $rootLocationId )
    {
        $this->languages = $languages;
        $this->rootLocationId = $rootLocationId
    }
}