This code bundle showcases one of the modules I worked on. The code uses Doctrine Entity Listeners with PHP Symfony Framework to let us dispatch actions upon changes to programmer-defined DB entities representing client orders in MySQL database. The changes are written to MongoDB as documents and subsequently rendered with Vue.JS. (https://symfony.com/doc/4.2/doctrine/event_listeners_subscribers.html) DISCLAIMER: references to private/sensitive data have been removed from the code.