advanced-go-programming-book/examples/ch4.4/grpc-pubsub/clientSub/clientSub.go

package main

import (
	"context"
	"fmt"
	"io"
	"log"

	"google.golang.org/grpc"

	pb "gobook.examples/ch4-04-grpc/grpc-pubsub/pubsubservice"
)

func main() {
	conn, err := grpc.Dial("localhost:1234", grpc.WithInsecure())
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()

	client := pb.NewPubsubServiceClient(conn)
	stream, err := client.Subscribe(context.Background(), &pb.String{Value: "golang:"})
	if err != nil {
		log.Fatal(err)
	}

	for {
		reply, err := stream.Recv()
		if err != nil {
			if err == io.EOF {
				break
			}
			log.Fatal(err)
		}

		fmt.Println(reply.GetValue())
	}
}