payden

    protected function _set_item_in_memcache($type, $id, $obj) {
        $mc_key = "cache_{$type}_{$id}";
        $this->cache->set($mc_key, json_encode($obj));
    }
    
    protected function _populate_item_from_memcache($type, $id) {
        $mc_key = "cache_{$type}_{$id}";
        $rv = $this->cache->get($mc_key);
        if ($rv === false) return;
        $this->_caches[$type][$id] = json_decode($rv, true);