# 애플리케이션 아키텍처

## 계층형 구조

![](/files/-Ma3SYreCDzs-jzy683m)

* controller, web
  * 웹 계층
* service
  * 비즈니스 로직, 트랜잭션 처리
* repository
  * JPA를 직접 사용하는 계층
  * EntityManager 사용
* domain
  * Entity가 모여있는 계층
  * 모든 계층에서 사용

controller도 repository에 직접 접근할 수 있되 방향은 단방향으로 흐르도록 작업할 예정이다.

## 패키지 구조

* jpabook.jpashop
  * domain
  * exception
  * repository
  * service
  * web

## 개발 순서

1. service, repository 계층을 개발
2. 테스트 케이스 작성 및 검증
3. 웹 계층 개발


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