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grpc.go
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grpc.go
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package server
import (
"fmt"
"net"
"reflect"
otm "github.com/gowins/dionysus/opentelemetry"
"github.com/gowins/dionysus/recovery"
"github.com/pkg/errors"
"google.golang.org/grpc"
"google.golang.org/grpc/channelz/service"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/reflection"
)
type grpcServer struct {
Cfg Cfg
srv *grpc.Server
handlers []func()
unaryInterceptors []grpc.UnaryServerInterceptor
streamInterceptors []grpc.StreamServerInterceptor
}
// EnableDebug
// https://github.com/grpc/grpc-experiments/tree/master/gdebug
func (g *grpcServer) EnableDebug() {
reflection.Register(g.srv)
service.RegisterChannelzServiceToServer(g.srv)
}
func (g *grpcServer) GetDefaultServerOpts() []grpc.ServerOption {
return []grpc.ServerOption{
grpc.MaxRecvMsgSize(g.Cfg.MaxMsgSize),
grpc.MaxSendMsgSize(g.Cfg.MaxMsgSize),
grpc.KeepaliveEnforcementPolicy(DefaultEnforcementPolicy),
grpc.KeepaliveParams(DefaultServerParameters),
}
}
// RegisterService 注册grpc handler
func (g *grpcServer) RegisterService(register interface{}, handler interface{}) (err error) {
defer recovery.CheckErr(&err)
if register == nil {
return fmt.Errorf("[register] should not be nil")
}
if handler == nil {
return fmt.Errorf("[handler] should not be nil")
}
tRegister := reflect.TypeOf(register)
tHandler := reflect.TypeOf(handler)
if tRegister.NumIn() != 2 {
return fmt.Errorf("[register] input num not match")
}
// if tRegister.In(0).String() != "*grpc.Server" {
registrar := new(grpc.ServiceRegistrar)
if !tRegister.In(0).Implements(reflect.TypeOf(registrar).Elem()) {
return fmt.Errorf("[register] input type error")
}
if !tHandler.Implements(tRegister.In(1)) {
return fmt.Errorf("%s not implements interface %s", tHandler.String(), tRegister.In(1).String())
}
// 注册handler
g.handlers = append(g.handlers, func() {
reflect.ValueOf(register).Call([]reflect.Value{reflect.ValueOf(g.srv), reflect.ValueOf(handler)})
})
return nil
}
func (g *grpcServer) AddUnaryServerInterceptors(interceptors ...grpc.UnaryServerInterceptor) {
g.unaryInterceptors = append(g.unaryInterceptors, interceptors...)
}
func (g *grpcServer) AddStreamServerInterceptors(interceptors ...grpc.StreamServerInterceptor) {
g.streamInterceptors = append(g.streamInterceptors, interceptors...)
}
func (g *grpcServer) Init(opts ...grpc.ServerOption) (gErr error) {
defer recovery.CheckErr(&gErr)
opts1 := g.GetDefaultServerOpts()
if g.Cfg.TlsCfg != nil {
opts1 = append(opts1, grpc.Creds(credentials.NewTLS(g.Cfg.TlsCfg)))
}
if otm.TracerIsEnable() {
log.Infof("[Dio] grpc use opentelemetry trace")
g.unaryInterceptors = append([]grpc.UnaryServerInterceptor{otm.GrpcUnaryTraceInterceptor()}, g.unaryInterceptors...)
g.streamInterceptors = append([]grpc.StreamServerInterceptor{otm.GrpcStreamTraceInterceptor()}, g.streamInterceptors...)
}
opts1 = append(opts1, grpc.ChainUnaryInterceptor(g.unaryInterceptors...),
grpc.ChainStreamInterceptor(g.streamInterceptors...))
g.srv = grpc.NewServer(append(opts1, opts...)...)
// 注册handle
for i := range g.handlers {
g.handlers[i]()
}
return
}
func (g *grpcServer) Start() (gErr error) {
defer recovery.CheckErr(&gErr)
if g.Cfg.Address == "" {
return fmt.Errorf("[grpc] please set address")
}
ts, err := net.Listen("tcp", g.Cfg.Address)
if err != nil {
return errors.Wrapf(err, "net Listen error, addr:%s", g.Cfg.Address)
}
log.Infof("Server [grpc] Listening on %s", ts.Addr().String())
g.Cfg.Address = ts.Addr().String()
if err := g.srv.Serve(ts); err != nil {
log.Errorf("[grpc] server stop error: %#v", err)
return err
}
return nil
}
func (g *grpcServer) Stop() error {
if g.Cfg.ForceStop {
log.Infof("grpc server start stop")
g.srv.Stop()
log.Infof("grpc server stop success")
} else {
log.Infof("grpc server start GracefulStop")
g.srv.GracefulStop()
log.Infof("grpc server GracefulStop success")
}
return nil
}