ItemRepository.php

<?php
/** @Service */
class ItemRepository extends LoSo_Doctrine_ORM_Tools_Dao_GenericDao
{
    $this->entityName = 'Application_Model_User';

    // Particular finder implemented with a DQL query
    public function findByCategory($category)
    {
        $q = $this->createQueryBuilder('i')
                   ->where(':category MEMBER OF i.categories')
                   ->getQuery();

        return $q->execute(array('category' => $category));
    }
}

OrderService.php

<?php
/** @Service */
class OrderService
{
    /** @Inject */
    private $userRepository;

    public function setUserRepository($userRepository)
    {
        $this->userRepository = $userRepository;
        return $this;
    }

    /** @Inject */
    private $itemRepository;

    public function setItemRepository($itemRepository)
    {
        $this->itemRepository = $itemRepository;
        return $this;
    }

    /**
     * Add business methods which may use the two injected
     * repositories and manage transactions.
     */

     // ...
}