/
main.go
154 lines (120 loc) · 3.96 KB
/
main.go
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package main
import (
"context"
"errors"
"expvar"
"fmt"
"net/http"
"os"
"os/signal"
"runtime"
"syscall"
"time"
"github.com/aamirlatif1/service/business/debug"
"github.com/aamirlatif1/service/foundation/logger"
"github.com/ardanlabs/conf/v3"
)
var build = "develop"
func main() {
var log *logger.Logger
events := logger.Events{
Error: func(ctx context.Context, r logger.Record) {
log.Info(ctx, "******* SEND ALERT ******")
},
}
traceIDFn := func(ctx context.Context) string {
return ""
}
log = logger.NewWithEvents(os.Stdout, logger.LevelInfo, "SALES-API", traceIDFn, events)
// -------------------------------------------------------------------------
ctx := context.Background()
if err := run(ctx, log); err != nil {
log.Error(ctx, "startup", "msg", err)
os.Exit(1)
}
}
func run(ctx context.Context, log *logger.Logger) error {
// -------------------------------------------------------------------------
// GOMAXPROCS
log.Info(ctx, "startup", "GOMAXPROCS", runtime.GOMAXPROCS(0), "build", build)
// -------------------------------------------------------------------------
// Configuration
cfg := struct {
conf.Version
Web struct {
ReadTimeout time.Duration `conf:"default:5s"`
WriteTimeout time.Duration `conf:"default:10s"`
IdleTimeout time.Duration `conf:"default:120s"`
ShutdownTimeout time.Duration `conf:"default:20s,mask"`
APIHost string `conf:"default:0.0.0.0:3000"`
DebugHost string `conf:"default:0.0.0.0:4000"`
CORSAllowedOrigins []string `conf:"default:*"`
}
}{
Version: conf.Version{
Build: build,
Desc: "Service Project",
},
}
const prefix = "SALES"
help, err := conf.Parse(prefix, &cfg)
if err != nil {
if errors.Is(err, conf.ErrHelpWanted) {
fmt.Println(help)
return nil
}
return fmt.Errorf("parsing config: %w", err)
}
// -------------------------------------------------------------------------
// App Starting
log.Info(ctx, "starting service", "version", build)
defer log.Info(ctx, "shutdown complete")
out, err := conf.String(&cfg)
if err != nil {
return fmt.Errorf("generating config for output: %w", err)
}
log.Info(ctx, "startup", "config", out)
expvar.NewString("build").Set(build)
// -------------------------------------------------------------------------
// Start Debug Service
go func() {
log.Info(ctx, "startup", "status", "debug v1 router started", "host", cfg.Web.DebugHost)
if err := http.ListenAndServe(cfg.Web.DebugHost, debug.Mux()); err != nil {
log.Error(ctx, "shutdown", "status", "debug v1 router closed", "host", cfg.Web.DebugHost, "msg", err)
}
}()
// -------------------------------------------------------------------------
// Start API Service
log.Info(ctx, "startup", "status", "initializing V1 API support")
shutdown := make(chan os.Signal, 1)
signal.Notify(shutdown, syscall.SIGINT, syscall.SIGTERM)
api := http.Server{
Addr: cfg.Web.APIHost,
Handler: mux.WebAPI(cfgMux, buildRoutes(), mux.WithCORS(cfg.Web.CORSAllowedOrigins)),
ReadTimeout: cfg.Web.ReadTimeout,
WriteTimeout: cfg.Web.WriteTimeout,
IdleTimeout: cfg.Web.IdleTimeout,
ErrorLog: logger.NewStdLogger(log, logger.LevelError),
}
serverErrors := make(chan error, 1)
go func() {
log.Info(ctx, "startup", "status", "api router started", "host", api.Addr)
serverErrors <- api.ListenAndServe()
}()
// -------------------------------------------------------------------------
// Shutdown
select {
case err := <-serverErrors:
return fmt.Errorf("server error: %w", err)
case sig := <-shutdown:
log.Info(ctx, "shutdown", "status", "shutdown started", "signal", sig)
defer log.Info(ctx, "shutdown", "status", "shutdown complete", "signal", sig)
ctx, cancel := context.WithTimeout(ctx, cfg.Web.ShutdownTimeout)
defer cancel()
if err := api.Shutdown(ctx); err != nil {
api.Close()
return fmt.Errorf("could not stop server gracefully: %w", err)
}
}
return nil
}