public function loadHashmap()
    {
        try {
            if ($this->_hashmap = \apc_fetch($this->_hashmapId)) {
                return $this->_hashmap;
            } else {
                return array();
            }
        } catch (\Exception $e) {
            $this->log('warning', \sprintf('Unable to load hashmap %s : %s', $this->_hashmapId, $e->getMessage()));

            return false;
        }
    }