Add basic struct and example usage

example/main.go

@@ -0,0 +1,83 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/go-i2p/go-meta-listener"
+)
+
+func main() {
+	// Create a new meta listener
+	metaListener := meta.NewMetaListener()
+	defer metaListener.Close()
+
+	// Create and add TCP listener
+	tcpListener, err := net.Listen("tcp", "127.0.0.1:8082")
+	if err != nil {
+		log.Fatalf("Failed to create TCP listener: %v", err)
+	}
+	if err := metaListener.AddListener("tcp", tcpListener); err != nil {
+		log.Fatalf("Failed to add TCP listener: %v", err)
+	}
+	log.Println("Added TCP listener on 127.0.0.1:8080")
+
+	// Create and add a Unix socket listener (on Unix systems)
+	socketPath := "/tmp/example.sock"
+	os.Remove(socketPath) // Clean up from previous runs
+	unixListener, err := net.Listen("unix", socketPath)
+	if err != nil {
+		log.Printf("Failed to create Unix socket listener: %v", err)
+	} else {
+		if err := metaListener.AddListener("unix", unixListener); err != nil {
+			log.Printf("Failed to add Unix socket listener: %v", err)
+		} else {
+			log.Println("Added Unix socket listener on", socketPath)
+		}
+	}
+
+	// Create a simple HTTP server using the meta listener
+	server := &http.Server{
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			fmt.Fprintf(w, "Hello from MetaListener! You connected via: %s\n", r.Proto)
+		}),
+	}
+
+	// Handle server shutdown gracefully
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
+
+	go func() {
+		log.Println("Server starting, listening on multiple transports")
+		if err := server.Serve(metaListener); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("HTTP server error: %v", err)
+		}
+	}()
+
+	// Wait for interrupt signal
+	<-stop
+	log.Println("Shutting down server...")
+
+	// Create a deadline for graceful shutdown
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	// Shut down the HTTP server
+	if err := server.Shutdown(ctx); err != nil {
+		log.Printf("Server shutdown error: %v", err)
+	}
+
+	// Wait for all listener goroutines to exit
+	if err := metaListener.WaitForShutdown(ctx); err != nil {
+		log.Printf("Timed out waiting for listener shutdown: %v", err)
+	}
+
+	log.Println("Server stopped")
+}