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https://github.com/imzero238/order-service

주문 생성 및 관리 테스트
https://github.com/imzero238/order-service

kafka kafka-streams spring-cloud

Last synced: 28 days ago
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주문 생성 및 관리 테스트

Host: GitHub
URL: https://github.com/imzero238/order-service
Owner: imzero238
Created: 2023-02-09T16:09:10.000Z (almost 2 years ago)
Default Branch: master
Last Pushed: 2024-11-29T07:36:25.000Z (about 2 months ago)
Last Synced: 2024-11-29T08:25:01.198Z (about 2 months ago)
Topics: kafka, kafka-streams, spring-cloud
Language: Java
Homepage:
Size: 4.49 MB
Stars: 0
Watchers: 1
Forks: 0
Open Issues: 1
Metadata Files:
- Readme: README.md

Awesome Lists containing this project

README

## E-commerce side project: Order-service

![](/_img/e_commerce_241129.png)

- Spring Boot, Spring Data JPA
- Spring Cloud G/W, Eureka
- **Kafka**
- MySQL
- OpenFeign
- Resilience4J CircuitBreaker + Retry

## 📚 Refactoring Log

### Transactional Outbox Pattern으로 선형성 보장

![](/_img/transactional_outbox_pattern.png)
- DB insert 작업과 Kafka Event 발행 작업의 선형성 보장
- DB insert 된 데이터만 Kafka Event 발생해 DB와 Kafka 간 속도 차이 해결
- but, TPS 저하 심각... 🤔 (현재 Debezium 적용 중)
- https://medium.com/@im_zero/transactional-outbox-pattern%EC%9C%BC%EB%A1%9C-%EC%9D%B4%EB%B2%A4%ED%8A%B8-%EB%B0%9C%ED%96%89-%EB%B3%B4%EC%9E%A5%ED%95%98%EA%B8%B0-0f2e045b2e50
- https://github.com/imzero238/Order-service/commit/6d4fcc6f6b19882117ef7f42369ba689ca535034

### Kafka Streams Join으로 DB I/O 최소화

![](/_img/kstream_ktable_join.png)

- KStream-KTable Join 작업으로 DB I/O 최소화
- *but, 데이터 실시간 접근 어려움 & task 할당 등 여러 문제 고려해 사용하지 않음 (포스팅에 포함)*
- https://medium.com/@im_zero/kstream-ktable-join-%EC%A0%81%EC%9A%A9-%EC%8B%A4%ED%8C%A8%EA%B8%B0-f7b8bfa11e42
- https://github.com/imzero238/Order-service/blob/master/src/main/java/com/ecommerce/orderservice/kafka/config/streams/KStreamKTableJoinConfig.java

### Resilience4J CircuitBreaker + Retry 설정

![](/_img/circuit-breaker-retry.png)

- OpenFeign 사용 메서드에 Resilience4J CircuitBreaker, Retry 모듈 추가해 무한 응답하는 상황 방지
- Exponential Backoff and Jitter 전략 사용
- https://medium.com/@im_zero/resilience4j-retry-circuitbreaker-%EC%A0%81%EC%9A%A9%ED%95%98%EA%B8%B0-a60d06a46c54
- https://github.com/imzero238/Order-service/blob/master/src/main/java/com/ecommerce/orderservice/openfeign/ItemServiceClient.java