Social Network Kata
3. Context and Scope¶
3.1 Business Context¶
Neighbour |
Communication |
Direction |
|---|---|---|
User (browser) |
HTTPS — REST/JSON via React SPA |
→ Social Network |
Email Provider |
SMTP or HTTP API (e.g. SendGrid) |
Social Network → |
3.2 Technical Context¶
Channel |
Protocol |
Purpose |
|---|---|---|
Browser ↔ FastAPI |
HTTPS / REST+JSON |
All user-facing operations |
FastAPI ↔ PostgreSQL |
TCP — asyncpg driver |
Persistent storage for all bounded contexts |
FastAPI → Email Provider |
HTTPS API |
Account verification, notifications |
3.3 Bounded Context Map¶
The system is divided into three bounded contexts. They communicate exclusively through internal REST APIs — no shared database tables.
Bounded Context |
Responsibilities |
Key Entities |
|---|---|---|
Users |
Profiles, authentication, follow relationships |
User, Profile, Follow |
Posts / Timeline |
Creating posts, reading personal and aggregated feeds |
Post, Feed, Like |
Messaging |
Direct messages, mentions |
Conversation, Message, Mention |
Cross-context calls:
Posts/Timeline → Users: resolve author profile data
Messaging → Users: resolve recipient profile data
Messaging → Posts/Timeline: resolve mentioned post context