module.config.php

return array(
    'di' => array(
        'definition' => array(
            'class' => array(
                'Genio\Cache' => array(
                    'setFileSystem' => array(
                        'cacheObject' => array(
                            'type' => 'Genio\Cache\Mem',
                            'required' => true
                        )
                    )
                )
            )
        ),
);


Genio\Cache.php

<?php

namespace Genio;

use Genio\Exceptions\RuntimeException,
    Genio\Cache\MemCached;

class Cache
{


    /**
     * Constructor
     *
     * @param \Genio\Cache $cacheObject Caching object (default null)
     */
    public function __construct(\Genio\Cache $cacheObject = null)
    {

        // Check if cache object not exist
        if (is_null($cacheObject)) {

            // Set default cache object
            //$cacheObject = new MemCached();

        }

        //var_dump($cacheObject);exit;

        // Set cache object
        $this->_cacheObject = $cacheObject;

    }