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main.go
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main.go
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package main
import (
"context"
"flag"
"fmt"
"github.com/georgysavva/generic-wallet/config"
"github.com/georgysavva/generic-wallet/postgres"
"github.com/georgysavva/generic-wallet/wallet"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"github.com/go-kit/kit/log"
)
func main() {
var configPath string
flag.StringVar(&configPath, "config", "config.json", "Path to the configuration file")
flag.Parse()
conf, err := config.Parse(configPath)
if err != nil {
panic(err)
}
paymentsRepository, err := postgres.NewPaymentsRepository(conf.Postgres)
if err != nil {
panic(err)
}
accountsRepository, err := postgres.NewAccountsRepository(conf.Postgres)
if err != nil {
panic(err)
}
var logger log.Logger
logger = log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
logger = log.With(logger, "ts", log.DefaultTimestampUTC)
ws := wallet.NewService(paymentsRepository, accountsRepository)
ws = wallet.NewLoggingService(log.With(logger, "component", "wallet"), ws)
mux := http.NewServeMux()
httpLogger := log.With(logger, "component", "http")
mux.Handle("/wallet/v1/", wallet.MakeHandler(ws, httpLogger))
httpAddr := fmt.Sprintf(":%d", conf.Port)
server := &http.Server{Addr: httpAddr, Handler: mux}
logger.Log("msg", "Start listening", "transport", "http", "address", httpAddr)
go func() {
if err := server.ListenAndServe(); err != http.ErrServerClosed {
panic(err)
}
}()
signalCode := waitingForShutdown()
logger.Log("msg", "Received shutdown signal", "code", signalCode)
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond*time.Duration(conf.ShutDownTimeout))
defer cancel()
if err := server.Shutdown(ctx); err != nil {
logger.Log("msg", "Graceful shutdown failed", "err", err)
}
}
func waitingForShutdown() os.Signal {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
signalCode := <-ch
return signalCode
}