added template for new golang backend

server/logic/application.go

@@ -0,0 +1,63 @@
+package logic
+
+import (
+	scn "blackforestbytes.com/simplecloudnotifier"
+	"context"
+	"database/sql"
+	"github.com/gin-gonic/gin"
+	"github.com/rs/zerolog/log"
+	"net"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+type Application struct {
+	Config   scn.Config
+	Gin      *gin.Engine
+	Database *sql.DB
+}
+
+func NewApp(db *sql.DB) *Application {
+	return &Application{Database: db}
+}
+
+func (app *Application) Init(cfg scn.Config, g *gin.Engine) {
+	app.Config = cfg
+	app.Gin = g
+}
+
+func (app *Application) Run() {
+	httpserver := &http.Server{
+		Addr:    net.JoinHostPort(app.Config.ServerIP, app.Config.ServerPort),
+		Handler: app.Gin,
+	}
+
+	errChan := make(chan error)
+
+	go func() {
+		log.Info().Str("address", httpserver.Addr).Msg("HTTP-Server started")
+		errChan <- httpserver.ListenAndServe()
+	}()
+
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
+	select {
+	case <-stop:
+		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+		defer cancel()
+		log.Info().Msg("Stopping HTTP-Server")
+		err := httpserver.Shutdown(ctx)
+		if err != nil {
+			log.Info().Err(err).Msg("Error while stopping the http-server")
+			return
+		}
+		log.Info().Msg("Stopped HTTP-Server")
+
+	case err := <-errChan:
+		log.Error().Err(err).Msg("HTTP-Server failed")
+	}
+
+}