We will use the domain-driven implementation and approach we described in the last chapter to implement the microservices using Spring Cloud. Let's revisit the key artifacts:
- Entities: These are categories of objects that are identifiable and remain the same throughout the states of the product/services. These objects are not defined by their attributes, but by their identities and threads of continuity. Entities have traits such as identity, a thread of continuity, and attributes that do not define their identity.
- Value objects (VOs): These just have the attributes and no conceptual identity. A best practice is to keep VOs as immutable objects. In the Spring Framework, entities are pure POJOs; therefore, we'll also use them as VOs.
- Service objects: These are common in technical frameworks. These are also used in the domain...
