serversdown
2db565ff9c
Introduces sfm/cache.py — a SQLite-backed cache (via SQLAlchemy) that sits between the SFM REST endpoints and the device, eliminating redundant cellular downloads for data that doesn't change. Cache behaviour by data type: - Device info / compliance config: cached until a config write occurs; POST /device/config now calls mark_config_dirty() to force a fresh read on the next /device/info call. - Event headers + peak values: cached permanently (append-only). On subsequent calls to /device/events, the server does a fast count_events() (~2s) instead of a full download (~10-30s); only new events are fetched from the device and merged into the cache. - Full waveforms (raw ADC samples): cached permanently — immutable once recorded. Repeated requests for the same waveform return instantly with zero device contact. - Monitor status (battery, memory, is_monitoring): 30-second TTL; auto- invalidated on start/stop monitoring commands. All endpoints gain a ?force=true param to bypass the cache when needed. New endpoints: GET /cache/stats, DELETE /cache/device. Adds requirements.txt listing fastapi, uvicorn, sqlalchemy, pyserial. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
5 lines
36 B
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5 lines
36 B
Plaintext
fastapi
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uvicorn
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sqlalchemy
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pyserial
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