generated from kzmake/skeleton
/
main.go
115 lines (89 loc) · 2.11 KB
/
main.go
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package main
import (
"context"
"os"
"os/signal"
"syscall"
"time"
"github.com/dapr/go-sdk/service/common"
daprd "github.com/dapr/go-sdk/service/grpc"
"github.com/kelseyhightower/envconfig"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"golang.org/x/sync/errgroup"
"golang.org/x/xerrors"
"google.golang.org/grpc"
"github.com/kzmake/examples/dapr-clock/microservices/wrk/secondhand/handler"
)
type Env struct {
Address string `default:"0.0.0.0:5050"`
Dapr struct {
Address string `default:"localhost:50001"`
}
}
const prefix = "TICK"
var env Env
var conn *grpc.ClientConn
func init() {
log.Logger = zerolog.New(zerolog.ConsoleWriter{Out: os.Stdout}).With().Timestamp().Logger()
if err := envconfig.Process(prefix, &env); err != nil {
log.Fatal().Msgf("%+v", err)
}
var err error
conn, err = grpc.Dial(env.Dapr.Address, grpc.WithInsecure())
if err != nil {
log.Fatal().Msgf("%+v", err)
}
log.Debug().Msgf("%+v", env)
}
func newBindingServer() (common.Service, error) {
s, err := daprd.NewService(env.Address)
if err != nil {
return nil, err
}
h := handler.NewTick(conn)
if err := s.AddTopicEventHandler(&common.Subscription{
PubsubName: "pubsub-x",
Topic: "Ticked1s",
}, h.Tick); err != nil {
return nil, err
}
return s, nil
}
func run() error {
ctx := context.Background()
ctx, cancel := context.WithCancel(ctx)
defer cancel()
g, ctx := errgroup.WithContext(ctx)
grpcS, err := newBindingServer()
if err != nil {
log.Fatal().Msgf("%+v", err)
}
g.Go(func() error {
return grpcS.Start()
})
quit := make(chan os.Signal, 1)
signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
defer signal.Stop(quit)
select {
case <-quit:
break
case <-ctx.Done():
break
}
cancel()
log.Info().Msg("Shutting down server...")
_, timeout := context.WithTimeout(context.Background(), 5*time.Second)
defer timeout()
_ = grpcS.Stop()
if err := g.Wait(); err != nil {
return xerrors.Errorf("failed to shutdown: %w", err)
}
log.Info().Msgf("Server exiting")
return nil
}
func main() {
if err := run(); err != nil {
log.Fatal().Msgf("Failed to run server: %v", err)
}
}