Example 25: Caching Patterns (six patterns with Redis)

[patterncatalyst]

Chapter

_docs/25-appendix-l-caching.md — Caching Patterns

Example Path

examples/25-caching/

What to demonstrate

• All six caching patterns:
  1. Cache-aside
  2. Read-through
  3. Write-through
  4. Write-around
  5. Write-back
  6. Refresh-ahead
• Consistency stories and failure modes for each
• Anti-patterns and decision guide

Stack

• Infra: Podman — Postgres + Redis + LGTM
• Language: Python (FastAPI + redis-py + asyncpg)
• Priority: HIGH
• Depends on: Add Redis to lgtm-podman-stack skill templates #1 (Redis infra)

Deliverables

• compose.yaml (with Redis + Postgres)
• Service implementing all 6 patterns (switchable via config/endpoint)
• README.md
• verify.sh
• Flip chapter footer to verified