Tabla A-1. Los componentes de nuestra arquitectura y lo que hacen todos ellos
Capa
Componente
Descripción
Dominio
Define la lógica empresarial.
Entidad
Un objeto de dominio cuyos atributos pueden cambiar, pero que tiene una identidad reconocible a lo largo del tiempo.
Objeto de valor
Un objeto de dominio inmutable cuyos atributos lo definen por completo. Es fungible con otros objetos idénticos.
Agregado
Conjunto de objetos asociados que tratamos como una unidad a efectos de cambios de datos. Define y aplica un límite de coherencia.
Evento
Representa algo que ha ocurrido.
Mando
Representa un trabajo que debe realizar el sistema.
Capa de servicio
Define las tareas que debe realizar el sistema y orquesta los distintos componentes.
Manipulador
Recibe una orden o un evento y realiza lo que tiene que ocurrir.
Unidad de trabajo
Abstracción en torno a la integridad de los datos. Cada unidad de trabajo representa una actualización atómica. Hace que los repositorios estén disponibles. Realiza un seguimiento de los nuevos eventos en los agregados recuperados.
Bus de mensajes (interno)
Maneja los comandos y eventos dirigiéndolos al manejador apropiado.
Adaptadores (secundarios)
Implementaciones concretas de una interfaz ...
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