save on signal

main.go

@@ -5,6 +5,8 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"os/signal"
+	"syscall"
 	"time"
 
 	messages "git.tornberg.me/go-cart-actor/proto"
@@ -193,6 +195,17 @@ func main() {
 	mux.HandleFunc("GET /save", app.HandleSave)
 	mux.Handle("/metrics", promhttp.Handler())
 
-	http.ListenAndServe(":8080", mux)
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGTERM)
+	done := make(chan bool, 1)
+	go func() {
+		sig := <-sigs
+		fmt.Println("Shutting down due to signal:", sig)
+		app.Save()
+		done <- true
+	}()
+
+	go http.ListenAndServe(":8080", mux)
+	<-done
 
 }