UserAggregates, Entities, and Value Objects

the concepts of aggregates, entities, and value objects using a simple example from the domain of e-commerce: an online shopping cart system.

1. Aggregates:

   • Aggregates are clusters of domain objects that are treated as a single unit.
   • They have a root entity, known as the aggregate root, which is responsible for maintaining consistency and enforcing invariants within the aggregate.
   • Aggregates are defined based on transactional consistency boundaries.
   • In our example, the shopping cart can be considered an aggregate. It consists of multiple items (entities) and has a root entity, the cart itself.

2. Entities:

   • Entities are objects that have a distinct identity and are defined by their attributes and behavior.
   • They represent domain concepts that are unique and are typically mutable.
   • Entities often have a lifecycle and