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main.go
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main.go
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package main
import (
"context"
"net"
"net/http"
"github.com/golang-migrate/migrate/v4"
grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
grpc_logrus "github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus"
grpc_recovery "github.com/grpc-ecosystem/go-grpc-middleware/recovery"
grpc_ctxtags "github.com/grpc-ecosystem/go-grpc-middleware/tags"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
"google.golang.org/protobuf/encoding/protojson"
mgr "github.com/exfly/vulcan/db/migration"
"github.com/exfly/vulcan/internel/config"
userrpc "github.com/exfly/vulcan/internel/user/rpc"
vulcanv1 "github.com/exfly/vulcan/pb"
// for migration
_ "github.com/golang-migrate/migrate/v4/database/postgres"
_ "github.com/jackc/pgx/v5/stdlib"
)
func main() {
app, err := NewApp(".")
if err != nil {
panic(err)
}
runDBMigration(app.cfg)
go func() {
log.WithField("addr", app.httpListener.Addr().String()).Info("start http server")
err := http.Serve(app.httpListener, app.httpHandler)
if err != nil {
log.WithError(err).Error("cannot start HTTP gateway server")
}
}()
log.WithField("addr", app.grpcListener.Addr().String()).Info("start gRPC server")
err = app.grpcServer.Serve(app.grpcListener)
if err != nil {
log.WithError(err).Fatal("cannot start gRPC server")
}
}
type App struct {
ctx context.Context
grpcListener net.Listener
grpcServer *grpc.Server
httpListener net.Listener
httpHandler http.Handler
cfg *config.Config
}
func newApp(
cfg *config.Config,
server vulcanv1.SimpleBankServer,
) (*App, error) {
ctx := context.Background()
ret := &App{
ctx: ctx,
cfg: cfg,
}
var (
err error
)
logEntry := log.NewEntry(log.StandardLogger())
grpcServer := grpc.NewServer(
grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
grpc_ctxtags.StreamServerInterceptor(),
grpc_recovery.StreamServerInterceptor(),
grpc_logrus.StreamServerInterceptor(logEntry),
)),
grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
grpc_ctxtags.UnaryServerInterceptor(),
grpc_recovery.UnaryServerInterceptor(),
grpc_logrus.UnaryServerInterceptor(logEntry),
)),
)
vulcanv1.RegisterSimpleBankServer(grpcServer, server)
reflection.Register(grpcServer)
ret.grpcServer = grpcServer
grpcListener, err := net.Listen("tcp", cfg.GRPCServerAddress)
if err != nil {
return nil, errors.Wrap(err, "cannot create listener")
}
ret.grpcListener = grpcListener
jsonOption := runtime.WithMarshalerOption(runtime.MIMEWildcard, &runtime.JSONPb{
MarshalOptions: protojson.MarshalOptions{
UseProtoNames: true,
},
UnmarshalOptions: protojson.UnmarshalOptions{
DiscardUnknown: true,
},
})
grpcMux := runtime.NewServeMux(jsonOption)
err = vulcanv1.RegisterSimpleBankHandlerServer(ctx, grpcMux, server)
if err != nil {
return nil, errors.Wrap(err, "cannot register handler server")
}
mux := http.NewServeMux()
mux.Handle("/", grpcMux)
httpListener, err := net.Listen("tcp", cfg.HTTPServerAddress)
if err != nil {
return nil, errors.Wrap(err, "cannot create listener")
}
ret.httpListener = httpListener
handler := userrpc.HTTPLogger(mux)
ret.httpHandler = handler
return ret, nil
}
func runDBMigration(cfg *config.Config) {
migration, err := mgr.NewMigration(cfg.DBSource)
if err != nil {
log.WithError(err).Fatal("cannot create new migrate instance")
}
if err = migration.Up(); err != nil && !errors.Is(err, migrate.ErrNoChange) {
log.WithError(err).Fatal("failed to run migrate up")
}
log.Info("db migrated successfully")
}