Backend-Like VS user-library

In order to create a scalable back-end I use micro-service architecture. Current version of HRV-Mart back-end consist of Product-Microservice, User-Microservice, Auth-Microservice, Order-Microservice, Cart-Microservice, Like-Micorservice and API-Gateway. Above micro-services are loosely couple and communication between them happens via Apache Kafka. In order to make them more secure, I added unit tests. The master branch is protected via branch protection rules

In HRV-Mart organisation, their are some libraries created which are meant to use by multiple micro-services. For example, Custom-Pageable is use to add pagination in Backend-Product, Backend-Order, Backend-Like and Backend-Cart, Cart-Response contains cart model, Product-library which contains product model, user-library is use to receive create user request from auth micro-service and order-library is use to receive order request. Both of them receive requests via Kafka. Both Cart-library and Product-library are use to calculate total cost of cart. They get data from REST-endpoint of Cart and Product respectively by using API-Call library.