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main.go
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main.go
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package main
import (
"context"
"log"
"net"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"github.com/go-park-mail-ru/2023_1_PracticalDev/internal/middleware"
"github.com/go-park-mail-ru/2023_1_PracticalDev/internal/pkg/config"
"github.com/go-park-mail-ru/2023_1_PracticalDev/internal/pkg/consul"
zaplogger "github.com/go-park-mail-ru/2023_1_PracticalDev/internal/pkg/log/zap"
"github.com/go-park-mail-ru/2023_1_PracticalDev/internal/pkg/metrics"
"github.com/go-park-mail-ru/2023_1_PracticalDev/internal/pkg/mongo"
proto "github.com/go-park-mail-ru/2023_1_PracticalDev/internal/shortener/delivery/grpc/proto"
serv "github.com/go-park-mail-ru/2023_1_PracticalDev/internal/shortener/delivery/grpc/server"
delHTTP "github.com/go-park-mail-ru/2023_1_PracticalDev/internal/shortener/delivery/http"
rep "github.com/go-park-mail-ru/2023_1_PracticalDev/internal/shortener/repository/mongo"
service "github.com/go-park-mail-ru/2023_1_PracticalDev/internal/shortener/service"
"github.com/julienschmidt/httprouter"
"github.com/spf13/viper"
"go.uber.org/zap"
"google.golang.org/grpc"
)
func main() {
// setting up logger
logger := zaplogger.NewDefaultZapProdLogger()
defer func() {
err := logger.Sync()
if err != nil {
log.Println(err)
}
}()
// reading configs
config.DefaultGRPCShortenerConfig()
viper.SetConfigFile("config")
viper.SetConfigType("yaml")
viper.AddConfigPath("/src/configs/")
err := viper.ReadInConfig()
if err != nil {
logger.Error("failed to read configuration", zap.Error(err))
}
// creating shortener service
client, err := mongo.NewMongoClient(logger)
if err != nil {
os.Exit(1)
}
defer client.Disconnect(context.Background()) //nolint
shortenerRep := rep.NewShortenerRepository(client.Database("url_shortener"), logger)
shortenerServ := serv.NewShortenerServer(shortenerRep)
// setting up metrics
ms := metrics.NewPrometheusMetrics("shortener")
err = ms.SetupMetrics()
if err != nil {
logger.Error("Failed to setup metrics", zap.Error(err))
os.Exit(1)
}
mw := middleware.NewGRPCMetricsMiddleware(ms)
// registration in consul
cnsl, err := consul.NewConsulClient()
if err != nil {
logger.Error("Failed to connect to consul", zap.Error(err))
os.Exit(1)
}
err = consul.RegisterService(cnsl)
if err != nil {
logger.Error("Failed to add service to consul", zap.Error(err))
os.Exit(1)
}
logger.Info("registered in consul")
defer func() {
err := cnsl.Agent().ServiceDeregister(viper.GetString(config.GrpcConfig.ServiceName) + "_" + config.GetConsulAddr())
if err != nil {
logger.Error("Failed to remove service from consul", zap.Error(err))
}
logger.Info("deregistered in consul")
}()
// creating grpc server
server := grpc.NewServer(
grpc.ChainUnaryInterceptor(mw.MetricsInterceptor),
)
proto.RegisterShortenerServer(server, shortenerServ)
lis, err := net.Listen("tcp", config.GetGRPCAddr())
if err != nil {
logger.Error("can't listet port", zap.Error(err))
return
}
logger.Info("Starting shortener grpc service")
go func() {
err = server.Serve(lis)
if err != nil {
logger.Error("Failed to start shortener grpc server, ", zap.Error(err))
return
}
}()
// setting up http server
mux := httprouter.New()
mux.GlobalOPTIONS = middleware.HandlerFuncLogger(middleware.OptionsHandler, logger)
shortenerService := service.NewShortenerService(shortenerRep)
metricsMiddleware := middleware.NewHttpMetricsMiddleware(ms)
delHTTP.RegisterGetHandler(mux, logger, shortenerService, metricsMiddleware)
httpServer := http.Server{
Addr: viper.GetString(config.HttpConfig.Addr),
Handler: mux,
}
logger.Info("Starting metrics...")
go metrics.ServePrometheusHTTP(viper.GetString(config.MetricsConfig.Addr))
logger.Info("Starting http server...")
go func() {
err = httpServer.ListenAndServe()
if err != nil {
logger.Error("Failed to start server", zap.Error(err))
}
}()
// gracefull shutdown
stop := make(chan os.Signal, 1)
signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
<-stop
server.GracefulStop()
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
err = httpServer.Shutdown(ctx)
if err != nil {
logger.Error("failed to gracefull shutdown http server", zap.Error(err))
}
}