- ProfileWork.cs: Business logic for DB-to-Hangfire sync
- Fetches active profiles from database via MediatR
- Registers/updates Hangfire recurring jobs with local timezone
- Removes stale jobs (deleted from DB)
- O(n) performance optimization using HashSet for lookups
- Uses ProfileWorker's stopping token for graceful shutdown
Job lifecycle:
- ProfileWorker stops → All running jobs cancelled via token closure
- Jobs use RecurringJobOptions with TimeZoneInfo.Local
- Automatic retry support via Hangfire [AutomaticRetry] attribute
- Create ProfileWorker namespace with 4 separate components
- ProfileWorker.cs: BackgroundService orchestrator with IOptions support
- ProfileWorkerOptions.cs: Configuration model with validation
- ProfileCache.cs: Thread-safe cache using composition pattern
- DependencyInjection.cs: Service registration with IValidateOptions
Benefits:
- Separation of concerns (orchestration, config, state, DI)
- IOptions pattern for appsettings.json configuration
- Startup validation for configuration errors
- Better testability and maintainability
