Database driven routes in CodeIgniter with caching

[eluser]boudou[/eluser]
i used your idea with doctrine 1.2 with update events on my routing table

Code:

public function postDelete($event){
        $this->_cache();
    }

      public function postInsert($event){
        $this->_cache();
    }


    function _cache() {

        $data[] = "<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');";

        $u = Doctrine::getTable('routes')->findAll();
        foreach ($u as $row) {
            $data[] = '$route["' . $row->route . '"] = "' . $row->controller . '";';
        }

        $output = implode("\n", $data);

        write_file(str_replace("\\", "/", FCPATH).APPPATH."cache/routes.php", $output);
    }

Thanks