public function listAction()
    {
        $arg = $this->request->get('args');
        $tasks = $this->taskProcessor->find($arg);

        $length = 0;
        foreach ($tasks as $t) $length = $length < strlen($t->getName()) ? strlen($t->getName()) : $length;

        foreach ($tasks as $task) {
            $this->send('%s        %s', str_pad($task->getName(), $length), $task->getShortDescription());
        }
    }