@Retention(value=RUNTIME)
@Target(value=TYPE)
@Documented
@Entity
public @interface AggregateRoot
Identifies an aggregate root, i.e. the root entity of an aggregate. An aggregate forms a cluster of consistent rules
usually formed around a set of entities by defining invariants based on the properties of the aggregate that have to
be met before and after operations on it. Aggregates usually refer to other aggregates by their identifier.
References to aggregate internals should be avoided and at least not considered strongly consistent (i.e. a reference
held could possibly have been gone or become invalid at any point in time). They also act as scope of consistency,
i.e. changes on a single aggregate are expected to be strongly consistent while changes across multiple ones should
only expect eventual consistency.
- Author:
- Christian Stettler, Henning Schwendtner, Stephan Pirnbaum, Martin Schimak, Oliver Drotbohm
- See Also:
- Domain-Driven Design
Reference (Evans) - Aggregates