| // Copyright 2019 Google LLC |
| // |
| // 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 wraps the client library in a gRPC interface that a benchmarker |
| // can communicate through. |
| package main |
| |
| import ( |
| "context" |
| "flag" |
| "fmt" |
| "log" |
| "net" |
| "os" |
| "strings" |
| |
| "cloud.google.com/go/pubsub" |
| pb "cloud.google.com/go/pubsub/internal/benchwrapper/proto" |
| "google.golang.org/grpc" |
| "google.golang.org/grpc/status" |
| ) |
| |
| var port = flag.String("port", "", "specify a port to run on") |
| |
| func main() { |
| flag.Parse() |
| if *port == "" { |
| log.Fatalf("usage: %s --port=8081", os.Args[0]) |
| } |
| |
| if os.Getenv("PUBSUB_EMULATOR_HOST") == "" { |
| log.Fatal("This benchmarking server only works when connected to an emulator. Please set PUBSUB_EMULATOR_HOST.") |
| } |
| |
| ctx := context.Background() |
| c, err := pubsub.NewClient(ctx, "someproject") |
| if err != nil { |
| log.Fatal(err) |
| } |
| |
| lis, err := net.Listen("tcp", fmt.Sprintf(":%s", *port)) |
| if err != nil { |
| log.Fatal(err) |
| } |
| s := grpc.NewServer() |
| pb.RegisterPubsubBenchWrapperServer(s, &server{ |
| c: c, |
| }) |
| log.Printf("Running on localhost:%s\n", *port) |
| log.Fatal(s.Serve(lis)) |
| } |
| |
| type server struct { |
| c *pubsub.Client |
| } |
| |
| func (s *server) Recv(ctx context.Context, req *pb.PubsubRecv) (*pb.EmptyResponse, error) { |
| sub := s.c.Subscription(req.SubName) |
| sub.ReceiveSettings.NumGoroutines = 1 |
| err := sub.Receive(ctx, func(ctx context.Context, msg *pubsub.Message) { |
| msg.Ack() |
| }) |
| |
| if err != nil { |
| s, _ := status.FromError(err) |
| // Return success on server initiated EOF, which is expected. |
| if strings.Contains(s.Message(), "EOF") { |
| return &pb.EmptyResponse{}, nil |
| } |
| return nil, err |
| } |
| return &pb.EmptyResponse{}, nil |
| } |