Critical fixes to prevent goroutine leaks during application shutdown:
1. Sync Queue Processor:
- Changed StartCleanupTask() to return context.CancelFunc
- Modified to accept and watch cancellable context
- Added queue context/cancel to Handler struct
- Created StartBackgroundTasks() method for main handler instance
- Cancel queue processor during shutdown in StopScheduler()
2. Connection Manager:
- Modified StartCleanupTask() to use cancellable context
- Returns cancel function that can be called during shutdown
- Goroutine now properly exits when context is cancelled
3. Handler Lifecycle:
- Added StartBackgroundTasks() to Handler
- Only main handler instance starts background goroutines
- Temporary handler instances (library/sync routes) don't start tasks
- StopScheduler() now properly shuts down all background goroutines
4. Router Integration:
- Updated SetupRoutes to accept queueProcessor parameter
- Main scanner handler starts background tasks after creation
- Library and sync route handlers don't start duplicate tasks
Impact:
- Fixes 2 major goroutine leaks (queue processor + connection cleanup)
- Application now properly shuts down all goroutines on exit
- No more resource leaks from long-running goroutines
- Test added to detect future goroutine regressions
Test: TestGoroutineCleanup verifies background services can be stopped.
Implement conflict detection for concurrent reading progress updates from different devices. Adds conflict management endpoints for listing, viewing, and resolving conflicts.
- Add ConflictHandler with CRUD endpoints for conflict management
- Implement automatic conflict detection in KOReader progress updates
- Add WebSocket broadcast for real-time conflict notifications
- Add database query for listing user conflicts by status
- Add integration tests and Bruno API test collection
Add ConnectionManager for real-time WebSocket communication:
- Message types for progress updates, annotations, conflicts
- Broadcast message structure with source device tracking
- Device connection tracking with user and device metadata
- Automatic broadcast loop with concurrent message delivery
- Connection management (add, remove, get by ID/user)
- Stale connection cleanup (2-minute timeout)
- Connection statistics by device type
- Background cleanup task runs every minute
This implements the core WebSocket infrastructure needed for
Week 9 of the Universal Sync Implementation Guide.
john-okeefe