Module.php

<?php    

    public function getServiceConfig()
    {
        return array('factories' => array(
            
            // Create a service named foursquare.handler and map it to this lazy-loaded closure
            // this is called from the controller. The code in this function is not called until a 
            // getService() call from a controller happens or if another service invokes it.
            'foursquare.handler' => function($sm) {
                
                // Construct the Api Handler and cache objects
                $handler = new \FoursquareModule\Classes\ApiHandler();
                $cache   = new \Doctrine\Common\Cache\ApcCache();
                
                // Pull the config data from the service manager ($sm)
                $config  = $sm->get('config');

                // Call the setters on the ApiHandler, passing in its dependencies
                $handler->setSecret($config['foursquare']['secret']);
                $handler->setKey($config['foursquare']['key']);
                $handler->setCache($cache);

                return $handler;
            }      
        ));
    }