129 lines
3.2 KiB
Go
129 lines
3.2 KiB
Go
package main
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import (
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"context"
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"fmt"
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"log/slog"
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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-molva.ru/Molva/molva-backend/services/api_gateway/internal/logger"
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"git-molva.ru/Molva/molva-backend/services/api_gateway/internal/constants"
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"git-molva.ru/Molva/molva-backend/services/api_gateway/internal/broker"
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"git-molva.ru/Molva/molva-backend/services/api_gateway/internal/config"
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httprouter "git-molva.ru/Molva/molva-backend/services/api_gateway/internal/http"
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)
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var (
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version string
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commit string
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date string
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)
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func main() {
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cfg := config.MustLoad(version, commit, date)
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fmt.Printf("Config: %+v\n", cfg)
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log, err := logger.New(cfg.Env)
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if err != nil {
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panic(err)
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}
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log.Info("Starting App", slog.String("version", version), slog.String("commit", commit), slog.String("build_date", date))
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brok := setupBroker(log, &cfg.Broker)
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defer func(brok *broker.RabbitMQBroker) {
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if err := brok.Disconnect(); err != nil {
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log.Error("Error disconnecting from broker")
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}
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}(brok)
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server, err := setupServer(log, cfg)
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if err != nil {
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panic(fmt.Sprintf("can not start http server: %v", err))
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}
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serverErrors := make(chan error, 1)
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go func() {
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log.Info("starting server", slog.Int("port", cfg.Port))
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serverErrors <- server.ListenAndServe()
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}()
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shutdownSignal := make(chan os.Signal, 1)
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signal.Notify(shutdownSignal, os.Interrupt, syscall.SIGTERM)
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select {
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case err := <-serverErrors:
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log.Error("Error starting server: %v\n", slog.Any("err", err))
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case sig := <-shutdownSignal:
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log.Info("received signal. shutting down server", slog.String("signal", sig.String()))
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}
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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log.Info("shutting down server...")
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if err := server.Shutdown(ctx); err != nil {
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log.Error(fmt.Sprintf("Error shutting down server: %v\n", err))
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}
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log.Info("server gracefully stopped")
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}
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func setupServer(logger *slog.Logger, cfg *config.Config) (*http.Server, error) {
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router, err := httprouter.New(logger, cfg)
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if err != nil {
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return nil, err
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}
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httprouter.SetupRouter(router, cfg.Build)
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return &http.Server{
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Addr: fmt.Sprintf("%s:%d", cfg.Host, cfg.Port),
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Handler: router.Mux,
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ReadHeaderTimeout: 15 * time.Second,
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}, nil
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}
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func doWithRetry(function func() error, serviceName string, logger *slog.Logger) {
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if err := function(); err != nil {
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logger.Error(fmt.Sprintf("Error connecting to %s: %v", serviceName, err),
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slog.String("error", err.Error()))
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go func() {
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ticker := time.NewTicker(constants.DefaultRetryTimeout)
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defer ticker.Stop()
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for range ticker.C {
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if err := function(); err != nil {
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logger.Error(fmt.Sprintf("Error connecting to %s: %v", serviceName, err),
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slog.String("error", err.Error()))
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} else {
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logger.Info(fmt.Sprintf("Successfully connected to %s service", serviceName))
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break
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}
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}
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}()
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} else {
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logger.Info(fmt.Sprintf("Successfully connected to %s service", serviceName))
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}
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}
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func setupBroker(logger *slog.Logger, cfg *config.Broker) *broker.RabbitMQBroker {
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brok := broker.NewRabbitMQBroker(cfg)
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doWithRetry(func() error {
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return brok.Connect()
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}, "Broker", logger)
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return brok
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}
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