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Central - data hub spine. Adapters -> NATS/JetStream -> archive.
- Python 89.1%
- HTML 9.3%
- CSS 1.3%
- PLpgSQL 0.3%
b8033444ec
Third CENTRAL_TRAFFIC-family member, first telemetry traffic source. Polls a
configured tile coverage set (Idaho metros, z=10), fetches Orbis vector flow
tiles, decodes per-segment relative_speed + road geometry, emits one telemetry
Event per road segment per poll to the new CENTRAL_TRAFFIC_FLOW stream. Renders
as colored polylines (green free-flow -> red jam) on the /telemetry map.
Production code; supervisor + gui + ARCHIVE restart (NEW event-bearing stream
central.traffic_flow.> -> archive must resubscribe). Ships disabled; needs a
"tomtom" api key in config.api_keys before enable.
- Subject central.traffic_flow.{z}.{x}.{y} (token traffic_flow, non-overlapping
with central.traffic.>). category="flow.tomtom_flow" -> GUI event_type "flow".
- Severity from relative_speed: >=0.75=1, 0.5-0.75=2, 0.25-0.5=3, <0.25=4.
- Cadence 300s; 7-day retention (high-volume telemetry). Dedup minute-bucketed,
inherited from the v0.9.1 SourceAdapter mixin.
- Shared tomtom_flow_parse module (decode + slippy-tile georeference) reused by
the v0.9.4 on-demand passthrough endpoint.
- Generic framework change (Option A, ~3 lines, inert for the other 14
adapters): Geo.geometry optional field + archive _build_geom_sql prefers it,
so segments persist their real LineString to the PostGIS geom column.
- Idaho-only (Orbis tier confirmed live). Cameras + Navi passthrough are follow-ups.
- deps: mapbox-vector-tile (vector PBF decode); itsdangerous promoted to an
explicit dependency (gui/csrf.py + gui/wizard.py imported it as an undeclared
transitive that uv re-lock would otherwise prune).
Full suite: 780 passed, 1 skipped (central and unprivileged zvx, 3x each).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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| CHANGELOG.md | ||
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Central
Central is the data hub spine for the infrastructure. Adapters normalize upstream sources into a canonical event shape, publish CloudEvents to NATS/JetStream, and archive to TimescaleDB for historical query. Single-LXC deployment.
Status
Phase 0 — scaffold. Not yet operational.
Architecture
- Python 3.12 (uv-managed)
- NATS + JetStream for live event bus
- TimescaleDB + PostGIS for archive and geospatial query
- One supervisor process managing adapter lifecycle
- One archive consumer process persisting events to TimescaleDB
- Both processes systemd-managed
Testing
See docs/test-database.md for test database setup.
License
MIT. See LICENSE.