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data-api/cmd/servercmd.go
Ask Bjørn Hansen 1f5fae973f
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Graceful shutdown
2023-10-22 15:47:53 -07:00

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Go

package cmd
import (
"context"
"errors"
"fmt"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"github.com/spf13/cobra"
"go.ntppool.org/common/logger"
"go.ntppool.org/data-api/server"
"golang.org/x/sync/errgroup"
)
func (cli *CLI) serverCmd() *cobra.Command {
var serverCmd = &cobra.Command{
Use: "server",
Short: "server starts the API server",
Long: `starts the API server on (default) port 8000`,
// DisableFlagParsing: true,
// Args: cobra.ExactArgs(1),
RunE: cli.serverCLI,
}
return serverCmd
}
func (cli *CLI) serverCLI(cmd *cobra.Command, args []string) error {
log := logger.Setup()
// cfg := cli.Config
ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
defer cancel()
g, ctx := errgroup.WithContext(ctx)
srv, err := server.NewServer(ctx, cfgFile)
if err != nil {
return fmt.Errorf("srv setup: %s", err)
}
g.Go(func() error {
return srv.Run()
})
g.Go(func() error {
<-ctx.Done()
shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
return srv.Shutdown(shutdownCtx)
})
err = g.Wait()
if err != nil && !errors.Is(err, http.ErrServerClosed) {
log.Error("server error", "err", err)
}
// don't tell cobra something went wrong as it'll just
// print usage information
return nil
}