105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
package main
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import (
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"context"
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"flag"
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"log/slog"
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"net/http"
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"os"
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"os/signal"
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"syscall"
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"hash-of-wisdom/internal/config"
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"hash-of-wisdom/internal/lib/sl"
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"hash-of-wisdom/internal/pow/challenge"
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"hash-of-wisdom/internal/quotes"
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"hash-of-wisdom/internal/server"
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"hash-of-wisdom/internal/service"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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_ "net/http/pprof"
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)
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func main() {
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configPath := flag.String("config", "", "path to configuration file")
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flag.Parse()
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// Load configuration
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cfg, err := config.Load(*configPath)
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if err != nil {
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slog.Error("failed to load config", sl.Err(err))
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os.Exit(1)
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}
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logger := slog.Default()
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logger.Info("starting word of wisdom server", "address", cfg.Server.Address)
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// Create components using config
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challengeConfig, err := challenge.NewConfig(
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challenge.WithDefaultDifficulty(cfg.PoW.Difficulty),
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challenge.WithMaxDifficulty(cfg.PoW.MaxDifficulty),
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challenge.WithChallengeTTL(cfg.PoW.TTL),
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challenge.WithHMACSecret([]byte(cfg.PoW.HMACSecret)),
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)
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if err != nil {
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logger.Error("failed to create challenge config", sl.Err(err))
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os.Exit(1)
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}
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generator := challenge.NewGenerator(challengeConfig)
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verifier := challenge.NewVerifier(challengeConfig)
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quoteService := quotes.NewHTTPService()
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// Wire up service
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genAdapter := service.NewGeneratorAdapter(generator)
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wisdomService := service.NewWisdomService(genAdapter, verifier, quoteService)
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// Create server configuration
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serverConfig := &server.Config{
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Address: cfg.Server.Address,
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Timeouts: server.TimeoutConfig{
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Read: cfg.Server.Timeouts.Read,
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Write: cfg.Server.Timeouts.Write,
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Connection: cfg.Server.Timeouts.Connection,
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},
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}
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// Go runtime metrics are automatically registered by default registry
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// Start metrics and pprof HTTP server
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go func() {
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http.Handle("/metrics", promhttp.Handler())
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logger.Info("starting metrics server", "address", cfg.Metrics.Address)
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if err := http.ListenAndServe(cfg.Metrics.Address, nil); err != nil {
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logger.Error("metrics server failed", sl.Err(err))
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}
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}()
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// Create context that cancels on interrupt signals
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ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
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defer cancel()
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// Create server
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srv := server.NewTCPServer(wisdomService, serverConfig,
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server.WithLogger(logger))
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// Start server
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if err := srv.Start(ctx); err != nil {
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logger.Error("failed to start server", sl.Err(err))
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os.Exit(1)
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}
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logger.Info("server ready - press ctrl+c to stop")
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// Wait for context cancellation (signal received)
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<-ctx.Done()
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// Graceful shutdown
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logger.Info("shutting down server")
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if err := srv.Stop(); err != nil {
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logger.Error("error during shutdown", sl.Err(err))
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} else {
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logger.Info("server stopped gracefully")
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}
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}
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