/
main.go
157 lines (136 loc) · 4.15 KB
/
main.go
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package cmd
import (
"context"
"fmt"
"github.com/b2wdigital/restQL-golang/v5/internal/platform/conf"
"github.com/b2wdigital/restQL-golang/v5/internal/platform/logger"
"github.com/b2wdigital/restQL-golang/v5/internal/platform/web"
"github.com/b2wdigital/restQL-golang/v5/pkg/restql"
"github.com/pkg/errors"
"github.com/valyala/fasthttp"
_ "go.uber.org/automaxprocs"
"golang.org/x/sync/errgroup"
"os"
"os/signal"
"runtime"
"syscall"
"time"
)
var build string
// Start initialize a restQL runtime as a server
func Start() {
if err := startServer(); err != nil {
fmt.Printf("[ERROR] failed to start restQL : %v", err)
os.Exit(1)
}
}
func startServer() error {
//// =========================================================================
//// Config
startupStart := time.Now()
cfg, err := conf.Load(build)
if err != nil {
return err
}
if cfg.HTTP.Server.EnableFullPprof {
runtime.SetMutexProfileFraction(1)
runtime.SetBlockProfileRate(1)
}
log := logger.New(os.Stdout, logger.LogOptions{
Enable: cfg.Logging.Enable,
TimestampFieldName: cfg.Logging.TimestampFieldName,
TimestampFieldFormat: cfg.Logging.TimestampFieldFormat,
Level: cfg.Logging.Level,
Format: cfg.Logging.Format,
})
//// =========================================================================
//// Start API
log.Info("initializing api")
shutdownSignal := make(chan os.Signal, 1)
signal.Notify(shutdownSignal, os.Interrupt, syscall.SIGTERM)
serverCfg := cfg.HTTP.Server
apiHandler, err := web.API(log, cfg)
if err != nil {
return err
}
api := &fasthttp.Server{
Name: "restql",
Handler: apiHandler,
TCPKeepalive: true,
IdleTimeout: serverCfg.IdleTimeout,
ReadTimeout: serverCfg.ReadTimeout,
DisableHeaderNamesNormalizing: true,
}
health := &fasthttp.Server{
Name: "health",
Handler: web.Health(log, cfg),
TCPKeepalive: true,
IdleTimeout: serverCfg.IdleTimeout,
ReadTimeout: serverCfg.ReadTimeout,
DisableHeaderNamesNormalizing: true,
}
serverErrors := make(chan error, 1)
go func() {
log.Info("api listing", "port", serverCfg.APIAddr)
serverErrors <- api.ListenAndServe(":" + serverCfg.APIAddr)
}()
go func() {
defer log.Info("stopping health")
log.Info("api health listing", "port", serverCfg.APIHealthAddr)
serverErrors <- health.ListenAndServe(":" + serverCfg.APIHealthAddr)
}()
if serverCfg.EnablePprof {
debug := &fasthttp.Server{Name: "debug", Handler: web.Debug(log)}
go func() {
log.Info("api debug listing", "port", serverCfg.PropfAddr)
serverErrors <- debug.ListenAndServe(":" + serverCfg.PropfAddr)
}()
}
//// =========================================================================
//// Shutdown
startupDelay := time.Since(startupStart)
log.Info("application running", "startup-time", startupDelay.String())
select {
case err := <-serverErrors:
return errors.Wrap(err, "server error")
case sig := <-shutdownSignal:
log.Info("starting shutdown", "signal", sig)
timeout, cancel := context.WithTimeout(context.Background(), serverCfg.GracefulShutdownTimeout)
defer cancel()
err := shutdown(timeout, log, api, health)
switch {
case sig == syscall.SIGSTOP:
return errors.New("integrity issue caused shutdown")
case err != nil:
return errors.Wrap(err, "could not stop server gracefully")
}
}
return nil
}
func shutdown(ctx context.Context, log restql.Logger, servers ...*fasthttp.Server) error {
var groupErr error
var g errgroup.Group
done := make(chan struct{})
for _, s := range servers {
s := s
g.Go(func() error {
log.Debug("starting shutdown", "server", s.Name)
err := s.Shutdown()
if err != nil {
log.Error(fmt.Sprintf("%s graceful shutdown did not complete", s.Name), err)
}
log.Debug("shutdown finished", "server", s.Name)
return err
})
}
go func() {
groupErr = g.Wait()
done <- struct{}{}
}()
select {
case <-ctx.Done():
return errors.New("graceful shutdown did not complete")
case <-done:
return groupErr
}
}