Tim Wundenberg
0ebe02619a
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Build Docker Image / Explore-Gitea-Actions (push) Successful in 51s
102 lines
2.1 KiB
Go
102 lines
2.1 KiB
Go
package main
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import (
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"me-fit/handler"
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"me-fit/types"
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"me-fit/utils"
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"os"
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"context"
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"database/sql"
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"log"
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"log/slog"
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"net/http"
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"os/signal"
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"sync"
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"syscall"
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"time"
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"github.com/joho/godotenv"
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_ "github.com/mattn/go-sqlite3"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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func main() {
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err := godotenv.Load()
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if err != nil {
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log.Fatal("Error loading .env file")
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}
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db, err := sql.Open("sqlite3", "./data.db")
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if err != nil {
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log.Fatal("Could not open Database data.db: ", err)
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}
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defer db.Close()
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run(context.Background(), db, os.Getenv)
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}
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func run(ctx context.Context, db *sql.DB, env func(string) string) {
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ctx, cancel := signal.NotifyContext(ctx, syscall.SIGINT, syscall.SIGTERM)
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defer cancel()
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slog.Info("Starting server...")
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// init server settings
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serverSettings := types.NewServerSettingsFromEnv(env)
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// init db
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err := utils.RunMigrations(db, "")
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if err != nil {
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slog.Error("Could not run migrations: " + err.Error())
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os.Exit(1)
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}
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// init servers
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var prometheusServer *http.Server
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if serverSettings.PrometheusEnabled {
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prometheusServer := &http.Server{
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Addr: ":8081",
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Handler: promhttp.Handler(),
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}
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go startServer(prometheusServer)
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}
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httpServer := &http.Server{
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Addr: ":" + serverSettings.Port,
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Handler: handler.GetHandler(db, serverSettings),
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}
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go startServer(httpServer)
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// graceful shutdown
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var wg sync.WaitGroup
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wg.Add(2)
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go shutdownServer(httpServer, ctx, &wg)
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go shutdownServer(prometheusServer, ctx, &wg)
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wg.Wait()
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}
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func startServer(s *http.Server) {
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slog.Info("Starting server on " + s.Addr)
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if err := s.ListenAndServe(); err != nil && err != http.ErrServerClosed {
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slog.Error("error listening and serving: " + err.Error())
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}
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}
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func shutdownServer(s *http.Server, ctx context.Context, wg *sync.WaitGroup) {
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defer wg.Done()
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if s == nil {
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return
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}
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<-ctx.Done()
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shutdownCtx := context.Background()
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shutdownCtx, cancel := context.WithTimeout(shutdownCtx, 10*time.Second)
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defer cancel()
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if err := s.Shutdown(shutdownCtx); err != nil {
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slog.Error("error shutting down http server: " + err.Error())
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} else {
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slog.Info("Gracefully stopped http server on " + s.Addr)
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}
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}
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