AI BriefingModernizing a 10-Year-Old Legacy - Part 2: The Implementation Journey of the Store Domain
Key point
Introduces the architecture and implementation strategy Oliveyoung adopted to modernize its legacy store domain based on DDD tactical design.
Details
The Oliveyoung Offline team applied tactical design from DDD (Domain-Driven Design) to carry out actual implementation in order to separate the store domain from the existing legacy system.
First, considering the team's technology stack situation, they built a skeleton project based on Java + Spring Boot. This decision took into account team members' proficiency, and included JPA, MyBatis, Swagger, Test Code, and more.
On the architecture side, they adopted the following strategies.
- Multi-module architecture: To facilitate future service separation (API, Consumer, Batch) and prevent code duplication, they subdivided modules into
store-core,store-domain,store-service, and others. - CQRS pattern: They separated Command and Query. They combined domain modeling via JPA with handling of complex query statements using Querydsl/MyBatis, improving both performance and maintainability.
In the domain model construction stage, to efficiently handle the vast table structure of the existing legacy system, they carried out modeling using Entity and VO (Value Object).
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