| /* |
| 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 ( |
| "sync" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go/common" |
| "github.com/apache/dubbo-go/common/extension" |
| "github.com/apache/dubbo-go/common/logger" |
| "github.com/apache/dubbo-go/protocol" |
| ) |
| |
| const GRPC = "grpc" |
| |
| func init() { |
| extension.SetProtocol(GRPC, GetProtocol) |
| } |
| |
| var grpcProtocol *GrpcProtocol |
| |
| type GrpcProtocol struct { |
| protocol.BaseProtocol |
| serverMap map[string]*Server |
| serverLock sync.Mutex |
| } |
| |
| func NewGRPCProtocol() *GrpcProtocol { |
| return &GrpcProtocol{ |
| BaseProtocol: protocol.NewBaseProtocol(), |
| serverMap: make(map[string]*Server), |
| } |
| } |
| |
| func (gp *GrpcProtocol) Export(invoker protocol.Invoker) protocol.Exporter { |
| url := invoker.GetUrl() |
| serviceKey := url.ServiceKey() |
| exporter := NewGrpcExporter(serviceKey, invoker, gp.ExporterMap()) |
| gp.SetExporterMap(serviceKey, exporter) |
| logger.Infof("Export service: %s", url.String()) |
| gp.openServer(url) |
| return exporter |
| } |
| |
| func (gp *GrpcProtocol) openServer(url common.URL) { |
| _, ok := gp.serverMap[url.Location] |
| if !ok { |
| _, ok := gp.ExporterMap().Load(url.ServiceKey()) |
| if !ok { |
| panic("[GrpcProtocol]" + url.Key() + "is not existing") |
| } |
| |
| gp.serverLock.Lock() |
| _, ok = gp.serverMap[url.Location] |
| if !ok { |
| srv := NewServer() |
| gp.serverMap[url.Location] = srv |
| srv.Start(url) |
| } |
| gp.serverLock.Unlock() |
| } |
| } |
| |
| func (gp *GrpcProtocol) Refer(url common.URL) protocol.Invoker { |
| invoker := NewGrpcInvoker(url, NewClient(url)) |
| gp.SetInvokers(invoker) |
| logger.Infof("Refer service: %s", url.String()) |
| return invoker |
| } |
| |
| func (gp *GrpcProtocol) Destroy() { |
| logger.Infof("GrpcProtocol destroy.") |
| |
| gp.BaseProtocol.Destroy() |
| |
| for key, server := range gp.serverMap { |
| delete(gp.serverMap, key) |
| server.Stop() |
| } |
| } |
| |
| func GetProtocol() protocol.Protocol { |
| if grpcProtocol == nil { |
| grpcProtocol = NewGRPCProtocol() |
| } |
| return grpcProtocol |
| } |