Function main

examples/features/debugging/client/main.go:48–93

()

)

func main() {
	flag.Parse()
	/***** Set up the server serving channelz service. *****/
	lis, err := net.Listen("tcp", *addr)
	if err != nil {
		log.Fatalf("failed to listen: %v", err)
	}
	defer lis.Close()
	s := grpc.NewServer()
	service.RegisterChannelzServiceToServer(s)
	go s.Serve(lis)
	defer s.Stop()

	/***** Initialize manual resolver and Dial *****/
	r := manual.NewBuilderWithScheme("whatever")
	r.InitialState(resolver.State{Addresses: []resolver.Address{{Addr: ":10001"}, {Addr: ":10002"}, {Addr: ":10003"}}})
	// Set up a connection to the server.
	conn, err := grpc.NewClient(r.Scheme()+":///test.server", grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(r), grpc.WithDefaultServiceConfig(`{"loadBalancingPolicy":"round_robin"}`))
	if err != nil {
		log.Fatalf("did not connect: %v", err)
	}
	defer conn.Close()
	// Manually provide resolved addresses for the target.

	c := pb.NewGreeterClient(conn)

	// Contact the server and print out its response.

	/***** Make 100 SayHello RPCs *****/
	for i := 0; i < 100; i++ {
		// Setting a 150ms timeout on the RPC.
		ctx, cancel := context.WithTimeout(context.Background(), 150*time.Millisecond)
		defer cancel()
		r, err := c.SayHello(ctx, &pb.HelloRequest{Name: *name})
		if err != nil {
			log.Printf("could not greet: %v", err)
		} else {
			log.Printf("Greeting: %s", r.Message)
		}
	}

	/***** Wait for user exiting the program *****/
	// Unless you exit the program (e.g. CTRL+C), channelz data will be available for querying.
	// Users can take time to examine and learn about the info provided by channelz.
	select {}
}