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ML-151: document Assets.Cache TTL and invalidation strategy

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Expand @moduledoc with cache key structure, 7-day TTL via
@one_week_seconds, periodic pruning by PruneAssetCache (every 12h),
and rationale for TTL-only invalidation (content-addressable immutable
assets). Update architecture.md entry accordingly.
This commit is contained in:
Claudio Ortolina
2026-04-30 13:05:59 +01:00
parent c489fde1cc
commit b8b3b24ffa
3 changed files with 65 additions and 5 deletions
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docs/architecture.md
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@@ -123,7 +123,7 @@ Last.fm schemas (separate, not Ecto-persisted to main DB):
| `Req.RateLimiter` | ETS-backed Req request step enforcing per-API minimum intervals between requests |
| `Req.RateLimiter.Clock` | Behaviour for time operations (allows test clock injection) |
| `Req.RateLimiter.SystemClock` | Real clock implementation using System.monotonic_time |
| `Assets.Cache` | ETS-based asset cache with TTL |
| `Assets.Cache` | ETS-based asset cache with TTL (7-day TTL, TTL-only invalidation since assets are content-addressable and immutable) |
| `Assets.Image` / `Assets.Transform` | Image processing via Vix (libvips) |
| `Colors.Extractor` | Behaviour for dominant color extraction (configurable, allows test stubbing) |
| `Colors.KMeansExtractor` | Color extraction via K-Means clustering (dominant_colors library), implements `Colors.Extractor` |