screentinker/android
ScreenTinker 1a5c468537
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fix(#148) android root cause: single-socket-per-device invariant (no duplicate connections)
The player opened duplicate/rapid WebSocket connections for the same device_id: connect() was
unconditional (disconnect + forceNew socket) and reachable from every lifecycle entry point
(boot, service start, MainActivity/ProvisioningActivity bind, foreground re-bind, START_STICKY).
A ROM that re-binds on foreground (MAXHUB PROC_STATE_TOP, isBindService:true) therefore
re-invoked connect() repeatedly -> a burst of sockets, each evicted by the next (the 8-in-9s
storm). Fire TV never re-binds like that, so it never reproduced.

- ConnectionGuard (new, pure/testable — service is the shell, per the OtaThrottle pattern):
  shouldOpenNewSocket(hasSocket, sameUrl, socketActive) — reuse a live/self-healing socket to
  the same url; open a new one only when none is usable.
- WebSocketService: connect() is now idempotent (@Synchronized + ConnectionGuard) — every entry
  point reuses the one socket, never opens a duplicate; body split into openSocket(). socketActive
  / currentUrl track the single socket.
- Single owner: onStartCommand now calls connect() so the SERVICE owns the one connection
  (idempotent across START_STICKY restarts), not whichever activity binds.
- Reconnect discipline: on io server/client disconnect (which Socket.IO does NOT auto-reconnect)
  mark the socket inert and schedule exactly ONE backed-off re-open — never a blind re-open loop;
  a transport drop keeps socketActive=true so Socket.IO's own reconnect is reused.

Test: ConnectionGuardTest (5, incl. 8-rapid-binds-all-reuse). :app:testDebugUnitTest green
(ConnectionGuard 5, OtaThrottle 7, ScheduleEval 1). NOT bumped/signed/released — Dan builds+signs
with the BMG keystore; 1.9.2-patch2 (server net) covers un-updated devices.
2026-07-02 19:29:50 -05:00
..
app fix(#148) android root cause: single-socket-per-device invariant (no duplicate connections) 2026-07-02 19:29:50 -05:00
gradle/wrapper Initial open source release 2026-04-08 12:14:53 -05:00
build.gradle.kts Initial open source release 2026-04-08 12:14:53 -05:00
gradle.properties Initial open source release 2026-04-08 12:14:53 -05:00
gradlew Initial open source release 2026-04-08 12:14:53 -05:00
gradlew.bat Initial open source release 2026-04-08 12:14:53 -05:00
settings.gradle.kts Initial open source release 2026-04-08 12:14:53 -05:00