ManaPHP\Message\Queue\Adapter\Db::pop PHP Метод

    public function pop($topic, $timeout = PHP_INT_MAX)
    {
        /**
         * @var \ManaPHP\Message\Queue\Adapter\Db\Model $model
         * @var \ManaPHP\Message\Queue\Adapter\Db\Model $modelInstance
         */
        $modelInstance = new $this->_model();
        $startTime = time();
        do {
            $model = $modelInstance::findFirst([['topic' => $topic, 'deleted' => 0], 'order' => 'priority ASC, id ASC']);
            if ($model && $modelInstance::updateAll(['deleted' => 1], ['id' => $model->id, 'deleted = 0'])) {
                return $model->body;
            }
            sleep(1);
        } while (time() - $startTime < $timeout);
        return false;
    }