Commit Graph
6 Commits
Author SHA1 Message Date
dtourolle 21f24dd998 perf(db): reads no longer wait behind writes; pages answer from cache
A series page took about a second to show its seasons on a phone, every
visit, although they were cached. Three things stacked up:

- One SQLite connection behind one mutex served the whole app, so every
  read queued behind every write. The database now has one owner: a
  writer thread for writes and a pool of read-only WAL connections for
  reads. synchronous = NORMAL and a busy timeout on every connection.
- The listing query built the set of every available item in the
  database before filtering to the parent (~80 ms on a desktop for a
  100k-item cache), then fetched user data one row at a time. It now
  checks availability per row, uses the hierarchy indexes (1.5 ms on
  the same benchmark) and batches the user-data lookup.
- A cache read that missed the 100 ms fast path was set aside until the
  server answered. It is now raced against the server; whichever answers
  first with content wins.

On the Fairphone, Frasier's season and episode lists now come from
cache in 34-133 ms (was 600-1030 ms waiting on the server).

Fixes found on the way, each with a test that failed first:
- sync_queue_mutation could return another mutation's row id: the id
  came from a second trip to the shared connection. insert() reads it in
  the same job.
- save_to_cache switched foreign keys off on the shared connection
  across its awaits, so concurrent writes ran unchecked. The toggle now
  lives inside one writer job, and a page is one transaction instead of
  one commit per row.

Also: thumbnail LRU touches no longer block the lookup; unused
tokio-rusqlite dropped. Design and invariants in
docs/architecture/08-database-design.md (Connection ownership, Listing
query shape) and 03-data-flow.md.
2026-09-24 03:58:04 +02:00
dtourolle c72ca86865 fix(storage): stop a panic poisoning the connection mutex for the whole session
`RusqliteService` is the path every async database operation in the app
takes, and all seven of its lock sites used a raw `.lock()`. A single
panic while that guard is held poisons the mutex, after which every
database call for the rest of the process returns "poisoned lock" — for
a database-backed app, the entire UI stops working until restart.

`utils::lock` exists to stop exactly this cascade, and `storage::Database`
already used `lock_safe()`. The busiest lock in the app was the one that
did not.

The test poisons the connection the way a panicking row mapper would and
asserts queries still serve.

The same raw-lock pattern remains at ~121 command-layer sites on the
`DatabaseWrapper`/`CredentialsWrapper` mutexes. Those degrade to a failed
command rather than a panic, and converting them is a mechanical sweep
better reviewed on its own.
2026-09-07 22:24:45 +02:00
dtourolle 3fbf6afdbc Background-audio handoff for video + repository/player refactor
Hand video playback off to a native audio-only stream when the app is
backgrounded or locked, with no on-device video decode (UR-040). Adds
player_enter/exit_background_audio commands, an audio-only stream URL
for video items across the repository layer, and the frontend handoff
state machine wired into VideoPlayer. Includes accompanying
repository/offline/player refactoring and regenerates the traceability
matrix.
2026-07-22 21:52:07 +02:00
dtourolle 09780103a7 Split software arch desc for easier manintenance. Many fixes related to next video playing and remote playback
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2026-03-01 19:47:46 +01:00
dtourolle e3797f32ca many changes
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2026-02-14 00:09:47 +01:00
dtourolle cfddc1edea First working POC 2026-01-26 22:21:54 +01:00