Phase 5: Application Lifecycle Management
Creates internal/app package for proper lifecycle management, signal
handling, and graceful shutdown of all services.
Changes:
- Create internal/app/app.go with App lifecycle manager
- Handles SIGINT, SIGTERM, SIGQUIT signals
- Graceful shutdown with 30-second timeout
- Manages HTTP server shutdown
- Manages scheduler start/stop
- Update cmd/server/main.go to use app lifecycle manager
- Replace defer-based cleanup with proper signal handling
- Server starts in background goroutine
- Blocks on app.Start() until shutdown signal
- Clean shutdown of all services
Benefits:
- Proper signal handling (Ctrl+C, kill, docker stop)
- Graceful shutdown prevents data corruption
- No more os.Exit(1) bypassing defer cleanup
- All services stopped in correct order
- Server stops accepting new connections first
- Then scheduler and background services stopped
Technical details:
- Uses sync.Mutex for shutdown safety
- Context with timeout for shutdown operations
- Channel-based coordination for shutdown completion
- Logs all lifecycle events for debugging
Fixes issue where e.Logger.Fatal() would call os.Exit(1)
immediately, skipping defer cleanup and causing unclean shutdown.
john-okeefe
0c24deb60b