71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
// Command mwse is the MWSE engine: a WebSocket relay that virtualizes connected
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// peers so they can exchange data through rooms, pairings and data tunnels without
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// knowing one another's real identity. It is the Go rewrite of the original
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// Node.js engine; the on-the-wire SDK contract is unchanged.
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package main
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import (
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"context"
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"errors"
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"log"
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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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"time"
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"git.saqut.com/saqut/mwse/internal/config"
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"git.saqut.com/saqut/mwse/internal/httpserver"
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"git.saqut.com/saqut/mwse/internal/services"
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"git.saqut.com/saqut/mwse/internal/ws"
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)
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func main() {
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cfg := config.Load()
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hub := ws.NewHub()
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reg := services.Register(hub)
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// The notify and datastore stores hold entries with a TTL; their janitors
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// reclaim expired ones so memory cannot grow without bound. They are stopped
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// during shutdown so no goroutine is leaked.
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stopNotify := reg.Notify.StartJanitor(time.Minute)
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stopData := reg.Data.StartJanitor(time.Minute)
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defer stopNotify()
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defer stopData()
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srv := httpserver.New(hub, cfg)
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// Run the listener in the background so main can wait for a shutdown signal.
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serverErr := make(chan error, 1)
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go func() {
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log.Printf("MWSE engine listening on %s", cfg.Addr())
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if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
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serverErr <- err
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}
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}()
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// Wait for SIGINT/SIGTERM or a fatal listener error.
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stop := make(chan os.Signal, 1)
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signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
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select {
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case err := <-serverErr:
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log.Fatalf("MWSE engine failed: %v", err)
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case sig := <-stop:
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log.Printf("received %s, shutting down gracefully", sig)
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}
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// Graceful shutdown: stop accepting new HTTP work, then close every live
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// WebSocket connection so peers receive a clean close frame.
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ctx, cancel := context.WithTimeout(context.Background(), cfg.ShutdownTimeout)
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defer cancel()
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if err := srv.Shutdown(ctx); err != nil {
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log.Printf("http shutdown error: %v", err)
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}
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hub.CloseAll()
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log.Printf("MWSE engine stopped")
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}
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