Asf_AbstractService::getFileLogger

<?php
define('MODULE_PATH', '/var/www/');

class IndexService extends Asf_AbstractService
{
    public function indexAction()
    {
        $logger = $this->getFileLogger('biz-dd_log');
        $logger->info('xxxxx');
        $logger->close();
    }
}

$configs = array(
    'asf' => array(
        'root_path'  => MODULE_PATH,
        'log_path' => LOG_PATH,
    )
);

$handle = new Asf_Application($configs);
$handle->run();