Mastering Microservices with Java - Third Edition

Entities

Entities are certain types of objects that are identifiable and remain the same throughout the different states of products/services. These objects are not identified by their attributes, but by their identity and thread of continuity. These types of objects are known as entities.

This sounds pretty simple, but it carries complexity. You need to understand how we can define entities. Let's take an example of a table-booking system, where we have a restaurant class with attributes such as restaurant name, address, phone number, establishment data, and so on. We can take two instances of the restaurant class that are not identifiable using the restaurant name, as there could be other restaurants with the same name. Similarly, if we ...