ToolkitFactory.php

<?php
namespace RPG\Service\Factory;
use Zend\ServiceManager\FactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
use ToolkitApi\Toolkit;

/**
 * Class ToolkitFactory
 * @package RPG\Service\Factory
 */
class ToolkitFactory implements FactoryInterface
{
    /**
     * @param ServiceLocatorInterface $serviceLocator
     * @return mixed
     */
    public function createService(ServiceLocatorInterface $serviceLocator)
    {
        $dbAdapter = $serviceLocator->get('Zend\Db\Adapter\Adapter');
        $dbAdapter->getDriver()
            ->getConnection()
            ->connect();
        $dbConn = $dbAdapter->getDriver()
            ->getConnection()
            ->getResource();

        // pass database connection into toolkit instantiation
        $tkConn = new Toolkit($dbConn, DB2_I5_NAMING_ON); // cheating here by hard-coding naming mode
        $tkConn->setOptions(array(
            'stateless' => true
        ));
        return $tkConn;
    }
}