JPA Week3 Entity Mapping / Hexagonal Architecture

JPA
Covenant Ko
Chapter 3
JPA
Entity Mapping / Hexagonal Architecture

- Name. Covenant Ko
- Company. 11번가
- Github 용감한친구들 Organization Founder & Maintainer. https://github.com/brave-people
- Github. https://github.com/KoEonYack
- Tech Blog. https://covenant.tistory.com/ (누적 방문 41만)

Q&A
https://www.javaguides.net/2018/12/jpa-entitymanager-interface-with-example.html

1. !
2. DB !
3. ORM !
4. !
5. !

1. !
2. DB !
3. ORM !
4. !
5. !
6. !

1. !
2. DB !
3. ORM !
4. !
5. !
6. !
7. !

1. !
2. DB !
3. ORM !
4. !
5. !
6. !
7. !
Week 1
Week 2
Week 2
Week 3

Clean Clean Architecture !
https://youtu.be/IHrZD3vxYB0
https://subscription.packtpub.com/book/programming/9781839211966/1

Clean Architecture
UI
Presenter
Use case
Entity
Repository
Data source
https://proandroiddev.com/clean-architecture-data-flow-dependency-rule-615ffdd79e29

Clean Architecture
UI
Presenter
Use case
Entity
Repository
Data source
Data Flow

Clean Architecture
UI
Presenter
Use case
Entity
Repository
Data source
Dependency Role
1.
2.
https://ko.wikipedia.org/wiki/%EC%84%9C%EC%9A%B8%EC%8A%A4%ED%80%98%EC%96%B4

Clean Architecture
UI
Presenter
Use
case
Entity
Repository
Data
source

Clean Architecture
UI
Presenter
Use
case
Entity
Repository
Data
source
Presentation
Layer
Domain Layer Data Layer

Clean Architecture
UI
Presenter
Use
case
Entity
Repository
Data
source
Presentation
Layer
Core

Clean Architecture
UI
Presenter
Use
case
Entity
Repository
Data
source
Presentation
Layer
Core
1. Domain (with business rules) is the most important Layer.
2. Shouldn’t have any dependencies with other layers.
3. Domain Layer does NOT depend on Data Layer.

Clean Architecture

Clean Architecture
View Presenter
Use case
Entity Repository

Clean Architecture
View Presenter
Use case
Entity Repository
1. Single Responsibility Principle
2. Dependency Inversion Principle

View Presenter
Use case
Entity Repository
Hexagonal Architecture

1. Core entity, use case
2.
3. 1:1
3. Core .
4. (
)
https://engineering.linecorp.com/ko/blog/port-and-adapter-architecture/

RPC
HTTP API
Command Line
MySQL
Oracle
H2
2.
3. 1:1
3. Core .
4. (
)

RPC
HTTP API
Command Line
MySQL
Oracle
H2
2.
3. 1:1
3. Core .
4. (
)
Spring Data JPA

Package by feature
Controller A
Data Access A Data Access B
Presentation layer
Business layer
Data Layer
Service A Service B
Controller B

Package by layer
.
.

Package by layer
1.
2.

Package by component
https://github.com/hyewonKim24/OntactOfficial
.
.

https://herbertograca.com/2017/11/16/explicit-architecture-01-ddd-hexagonal-onion-clean-cqrs-how-i-put-it-all-together/#inversion-of-control
Hexagonal Architecture Package

https://blog.gaokx.de/2020/11/think-about-hexagonal-architecture-and.html
Hexagonal Architecture Package

Hexagonal Architecture Code
Ports are used by external components to call our application
https://jivimberg.io/blog/2020/02/01/hexagonal-architecture-on-spring-boot/

Service to tie all the pieces together and drive the execution

Hexagonal Architecture Example Code
https://github.com/thombergs/buckpal

Hexagonal Architecture Sample Code
https://blog.gaokx.de/2020/11/think-about-hexagonal-architecture-and.html

https://techblog.woowahan.com/5143/
Case Study

https://resources.experfy.com/bigdata-cloud/another-story-about-microservices-hexagonal-architecture/
Case Study

https://aws.amazon.com/ko/blogs/compute/developing-evolutionary-architecture-with-aws-lambda/
Case Study

Case Study
API Gateway
https://docs.microsoft.com/ko-kr/dotnet/architecture/microservices/architect-microservice-container-applications/direct-client-to-microservice-communication-versus-the-api-gateway-pattern

https://herbertograca.com/2017/11/16/explicit-architecture-01-ddd-hexagonal-onion-clean-cqrs-how-i-put-it-all-together/#inversion-of-control
Summary

JPA Week3 Entity Mapping / Hexagonal Architecture

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