Magento 2
vendor/magento/module-mysql-mq/Model/QueueManagement.php
Queue status:
const MESSAGE_STATUS_NEW = 2;
const MESSAGE_STATUS_IN_PROGRESS = 3;
const MESSAGE_STATUS_COMPLETE= 4;
const MESSAGE_STATUS_RETRY_REQUIRED = 5;
const MESSAGE_STATUS_ERROR = 6;
const MESSAGE_STATUS_TO_BE_DELETED = 7;