github.com/micro/go-micro/examples@v0.0.0-20210105173217-bf4ab679e18b/roundrobin/api.go (about)

     1  package main
     2  
     3  import (
     4  	"encoding/json"
     5  	"log"
     6  	"strings"
     7  
     8  	hello "github.com/micro/go-micro/examples/greeter/srv/proto/hello"
     9  	"github.com/micro/go-micro/v2"
    10  	"github.com/micro/go-micro/v2/errors"
    11  	roundrobin "github.com/micro/go-plugins/wrapper/select/roundrobin/v2"
    12  	api "github.com/micro/micro/v2/api/proto"
    13  
    14  	"context"
    15  )
    16  
    17  type Say struct {
    18  	Client hello.SayService
    19  }
    20  
    21  func (s *Say) Hello(ctx context.Context, req *api.Request, rsp *api.Response) error {
    22  	log.Print("Received Say.Hello API request")
    23  
    24  	name, ok := req.Get["name"]
    25  	if !ok || len(name.Values) == 0 {
    26  		return errors.BadRequest("go.micro.api.greeter", "Name cannot be blank")
    27  	}
    28  
    29  	response, err := s.Client.Hello(ctx, &hello.Request{
    30  		Name: strings.Join(name.Values, " "),
    31  	})
    32  	if err != nil {
    33  		return err
    34  	}
    35  
    36  	rsp.StatusCode = 200
    37  	b, _ := json.Marshal(map[string]string{
    38  		"message": response.Msg,
    39  	})
    40  	rsp.Body = string(b)
    41  
    42  	return nil
    43  }
    44  
    45  func main() {
    46  	wrapper := roundrobin.NewClientWrapper()
    47  
    48  	service := micro.NewService(
    49  		micro.Name("go.micro.api.greeter"),
    50  		micro.WrapClient(wrapper),
    51  	)
    52  
    53  	// parse command line flags
    54  	service.Init()
    55  
    56  	service.Server().Handle(
    57  		service.Server().NewHandler(
    58  			&Say{Client: hello.NewSayService("go.micro.srv.greeter", service.Client())},
    59  		),
    60  	)
    61  
    62  	if err := service.Run(); err != nil {
    63  		log.Fatal(err)
    64  	}
    65  }