Example 19: DDD & Hexagonal Architecture

[patterncatalyst]

Chapter

_docs/19-appendix-f-ddd-hexagonal.md — DDD & Hexagonal Architecture

Example Path

examples/19-ddd-hexagonal/

What to demonstrate

• Hexagonal architecture with ports and adapters
• Domain model isolated from infrastructure
• Multiple adapters: REST, gRPC, GraphQL, Kafka
• Strategic DDD boundaries in the order domain

Stack

• Infra: Podman — Postgres + LGTM
• Language: Python or Go
• Priority: Low (architectural pattern)

Deliverables

• compose.yaml
• Service with clean hexagonal structure
• README.md
• verify.sh
• Flip chapter footer to verified