Vladimir Zagainov
582202bb86
- Add context cancellation check between pagination pages in GetArtistReleaseGroups for responsive graceful shutdown during large discography fetches. - Eliminate double DB query on cache hit by having GetCachedReleases return []ExternalRelease directly instead of just a count, avoiding a redundant second query in SyncArtistDiscography. - Update cache_test.go to match new GetCachedReleases return type. - Format main.go (pre-existing whitespace issue).
100 lines
2.4 KiB
Go
100 lines
2.4 KiB
Go
package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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"os"
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"os/signal"
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"syscall"
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"naviwatcher/internal/config"
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"naviwatcher/internal/database"
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"naviwatcher/internal/musicbrainz"
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)
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// App holds all application dependencies for clean shutdown and testability.
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type App struct {
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cfg *config.Config
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db *database.DB
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mbClient *musicbrainz.MusicBrainzClient
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}
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const defaultConfigPath = "config.yaml"
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func main() {
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configPath := flag.String("config", defaultConfigPath, "Path to config file")
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flag.Parse()
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log.Println("NaviWatcher starting...")
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cfg, err := config.LoadConfig(*configPath)
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if err != nil {
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log.Fatalf("Failed to load config: %v", err)
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}
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log.Printf("Config loaded from %s (server: %s:%d)", *configPath, cfg.Server.Host, cfg.Server.Port)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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sigCh := make(chan os.Signal, 1)
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signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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sig := <-sigCh
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log.Printf("Received signal %v, shutting down...", sig)
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cancel()
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}()
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app, err := NewApp(ctx, cfg)
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if err != nil {
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log.Fatalf("Failed to initialize application: %v", err)
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}
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defer app.Close()
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if err := app.run(ctx); err != nil {
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log.Fatalf("Application error: %v", err)
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}
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log.Println("NaviWatcher stopped.")
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}
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// NewApp initializes all application components: config, database, and MusicBrainz client.
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func NewApp(ctx context.Context, cfg *config.Config) (*App, error) {
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// Initialize database (uses default path or could be made configurable).
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db, err := database.New("naviwatcher.db")
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if err != nil {
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return nil, fmt.Errorf("failed to initialize database: %w", err)
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}
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// Initialize MusicBrainz client with rate limiting.
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mbClient := musicbrainz.NewClient(cfg.MusicBrainz)
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log.Printf("MusicBrainz client initialized (user-agent: %s)", cfg.MusicBrainz.UserAgent)
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return &App{
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cfg: cfg,
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db: db,
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mbClient: mbClient,
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}, nil
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}
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// Close cleans up all application resources in reverse order of initialization.
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func (a *App) Close() {
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if a.db != nil {
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if err := a.db.Close(); err != nil {
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log.Printf("Error closing database: %v", err)
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}
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}
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}
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func (a *App) run(ctx context.Context) error {
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// Main application loop — blocks until context is cancelled.
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// Business logic (scanner, notifier, web server) will be wired into
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// separate goroutines here in future tasks.
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<-ctx.Done()
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return nil
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}
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