forked from apache/dubbo-go
/
server.go
172 lines (148 loc) · 4.43 KB
/
server.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package grpc
import (
"fmt"
"net"
"sync"
"time"
)
import (
"github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc"
"github.com/opentracing/opentracing-go"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
)
import (
"dubbo.apache.org/dubbo-go/v3/common"
"dubbo.apache.org/dubbo-go/v3/common/logger"
"dubbo.apache.org/dubbo-go/v3/config"
"dubbo.apache.org/dubbo-go/v3/protocol"
)
// DubboGrpcService is gRPC service
type DubboGrpcService interface {
// SetProxyImpl sets proxy.
SetProxyImpl(impl protocol.Invoker)
// GetProxyImpl gets proxy.
GetProxyImpl() protocol.Invoker
// ServiceDesc gets an RPC service's specification.
ServiceDesc() *grpc.ServiceDesc
}
// Server is a gRPC server
type Server struct {
grpcServer *grpc.Server
bufferSize int
}
// NewServer creates a new server
func NewServer() *Server {
return &Server{}
}
func (s *Server) SetBufferSize(n int) {
s.bufferSize = n
}
// Start gRPC server with @url
func (s *Server) Start(url *common.URL) {
var (
addr string
err error
)
addr = url.Location
lis, err := net.Listen("tcp", addr)
if err != nil {
panic(err)
}
// If global trace instance was set, then server tracer instance
// can be get. If not, will return NoopTracer.
tracer := opentracing.GlobalTracer()
server := grpc.NewServer(
grpc.UnaryInterceptor(otgrpc.OpenTracingServerInterceptor(tracer)),
grpc.StreamInterceptor(otgrpc.OpenTracingStreamServerInterceptor(tracer)),
grpc.MaxRecvMsgSize(1024*1024*s.bufferSize),
grpc.MaxSendMsgSize(1024*1024*s.bufferSize),
)
s.grpcServer = server
go func() {
providerServices := config.GetProviderConfig().Services
if len(providerServices) == 0 {
panic("provider service map is null")
}
// wait all exporter ready , then set proxy impl and grpc registerService
waitGrpcExporter(providerServices)
registerService(providerServices, server)
reflection.Register(server)
if err = server.Serve(lis); err != nil {
logger.Errorf("server serve failed with err: %v", err)
}
}()
}
// getSyncMapLen get sync map len
func getSyncMapLen(m *sync.Map) int {
length := 0
m.Range(func(_, _ interface{}) bool {
length++
return true
})
return length
}
// waitGrpcExporter wait until len(providerServices) = len(ExporterMap)
func waitGrpcExporter(providerServices map[string]*config.ServiceConfig) {
t := time.NewTicker(50 * time.Millisecond)
defer t.Stop()
pLen := len(providerServices)
ta := time.NewTimer(10 * time.Second)
defer ta.Stop()
for {
select {
case <-t.C:
mLen := getSyncMapLen(grpcProtocol.ExporterMap())
if pLen == mLen {
return
}
case <-ta.C:
panic("wait grpc exporter timeout when start grpc server")
}
}
}
// registerService SetProxyImpl invoker and grpc service
func registerService(providerServices map[string]*config.ServiceConfig, server *grpc.Server) {
for key, providerService := range providerServices {
service := config.GetProviderService(key)
ds, ok := service.(DubboGrpcService)
if !ok {
panic("illegal service type registered")
}
serviceKey := common.ServiceKey(providerService.Interface, providerService.Group, providerService.Version)
exporter, _ := grpcProtocol.ExporterMap().Load(serviceKey)
if exporter == nil {
panic(fmt.Sprintf("no exporter found for servicekey: %v", serviceKey))
}
invoker := exporter.(protocol.Exporter).GetInvoker()
if invoker == nil {
panic(fmt.Sprintf("no invoker found for servicekey: %v", serviceKey))
}
ds.SetProxyImpl(invoker)
server.RegisterService(ds.ServiceDesc(), service)
}
}
// Stop gRPC server
func (s *Server) Stop() {
s.grpcServer.Stop()
}
// GracefulStop gRPC server
func (s *Server) GracefulStop() {
s.grpcServer.GracefulStop()
}