example: multiplex

Show that a channel can be shared by two stubs and two servicers can share a
server.

Author: menghanl

Diff for: examples/multiplex/client/main.go

@@ -0,0 +1,50 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed 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 main
+
+import (
+	"log"
+
+	"google.golang.org/grpc"
+	hwpb "google.golang.org/grpc/examples/helloworld/helloworld"
+	hwclient "google.golang.org/grpc/examples/helloworld/helloworld/client"
+	rgpb "google.golang.org/grpc/examples/route_guide/routeguide"
+	rgclient "google.golang.org/grpc/examples/route_guide/routeguide/client"
+)
+
+const (
+	address = "localhost:50051"
+)
+
+func main() {
+	// Set up a connection to the server.
+	conn, err := grpc.Dial(address, grpc.WithInsecure())
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+
+	// Make a greeter client and send an RPC.
+	hwc := hwpb.NewGreeterClient(conn)
+	hwclient.CallSayHello(hwc, "multiplex")
+
+	// Make a routeguild client with the same ClientConn.
+	rgc := rgpb.NewRouteGuideClient(conn)
+	rgclient.CallPrintFeature(rgc, &rgpb.Point{Latitude: 409146138, Longitude: -746188906})
+}

Diff for: examples/multiplex/server/main.go

@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed 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 main
+
+import (
+	"log"
+	"net"
+
+	"google.golang.org/grpc"
+	hwpb "google.golang.org/grpc/examples/helloworld/helloworld"
+	hwserver "google.golang.org/grpc/examples/helloworld/helloworld/server"
+	rgpb "google.golang.org/grpc/examples/route_guide/routeguide"
+	rgserver "google.golang.org/grpc/examples/route_guide/routeguide/server"
+	"google.golang.org/grpc/examples/route_guide/testdata"
+)
+
+const (
+	port = ":50051"
+)
+
+func main() {
+	lis, err := net.Listen("tcp", port)
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	s := grpc.NewServer()
+
+	// Register Greeter on the server.
+	hwpb.RegisterGreeterServer(s, hwserver.New())
+
+	// Register RouteGuide on the same server.
+	rgpb.RegisterRouteGuideServer(s, rgserver.New(testdata.Path("route_guide_db.json")))
+
+	if err := s.Serve(lis); err != nil {
+		log.Fatalf("failed to serve: %v", err)
+	}
+}