gistfile1.php

<?php

/* existing stuffs */

class Module
{
    /* more existing stuffs */ 
    public function getServiceConfig()
    {
        return array(
            'factories' => array(
                'My\Service\Cake' => function(\Zend\ServiceManager\ServiceLocatorInterface $serviceManager) {
                    $dbAdapter = $serviceManager->get('Zend\Db\Adapter');
                    $cakeService = new Service\Cake;
                    $cakeService->setAdapter($dbAdapter);
                    return $cakeService;
                },
                'My\Model\Cake' => function(\Zend\ServiceManager\ServiceLocatorInterface $serviceManager) {
                    $cakeService = $serviceManager->get('My\Service\Cake');
                    $cakeModel = new Model\Cake;
                    $cakeModel->setService($cakeService);
                    return $cakeModel;
                },
            ),
        );
    }
}