We'll start out by refactoring the inventory management module, like we did in in the section titled The Book and InventoryClerk actors, in Chapter 3, Curing Anemic Models with Domain-Driven Design. The focus of the next few sections will be to get the
Book entity to use
PersistentActor and an event sourced approach to its persistence. This will be a multi-part process where we do an initial simple refactor. Then, we'll layer in some improvements as I introduce a few new concepts from Akka Persistence.
PersistentEntity abstract class, in the
bookstore-common project, is the base class that all of our concrete event sourced entities will extend from. It's a similar ...