2016-01-02 22:32:23 +00:00
|
|
|
package main
|
|
|
|
|
|
|
|
import (
|
|
|
|
"fmt"
|
|
|
|
"os"
|
|
|
|
|
|
|
|
"github.com/micro/cli"
|
|
|
|
"github.com/micro/go-micro"
|
|
|
|
"github.com/micro/go-micro/client"
|
|
|
|
proto "github.com/micro/go-micro/examples/service/proto"
|
2016-01-28 17:55:28 +00:00
|
|
|
"github.com/micro/go-micro/metadata"
|
2016-01-02 22:32:23 +00:00
|
|
|
"github.com/micro/go-micro/server"
|
|
|
|
"golang.org/x/net/context"
|
|
|
|
)
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
|
|
|
Example usage of top level service initialisation including wrappers
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
type logWrapper struct {
|
|
|
|
client.Client
|
|
|
|
}
|
|
|
|
|
|
|
|
func (l *logWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
|
2016-01-28 17:55:28 +00:00
|
|
|
md, _ := metadata.FromContext(ctx)
|
2016-01-02 22:32:23 +00:00
|
|
|
fmt.Printf("[Log Wrapper] ctx: %v service: %s method: %s\n", md, req.Service(), req.Method())
|
|
|
|
return l.Client.Call(ctx, req, rsp)
|
|
|
|
}
|
|
|
|
|
|
|
|
// Implements client.Wrapper as logWrapper
|
|
|
|
func logWrap(c client.Client) client.Client {
|
|
|
|
return &logWrapper{c}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Implements the server.HandlerWrapper
|
|
|
|
func logHandlerWrapper(fn server.HandlerFunc) server.HandlerFunc {
|
|
|
|
return func(ctx context.Context, req server.Request, rsp interface{}) error {
|
|
|
|
fmt.Printf("[Log Wrapper] Before serving request method: %v\n", req.Method())
|
|
|
|
err := fn(ctx, req, rsp)
|
|
|
|
fmt.Println("[Log Wrapper] After serving request")
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
type Greeter struct{}
|
|
|
|
|
|
|
|
func (g *Greeter) Hello(ctx context.Context, req *proto.HelloRequest, rsp *proto.HelloResponse) error {
|
|
|
|
rsp.Greeting = "Hello " + req.Name
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// Setup and the client
|
|
|
|
func runClient(service micro.Service) {
|
|
|
|
// Create new greeter client
|
|
|
|
greeter := proto.NewGreeterClient("greeter", service.Client())
|
|
|
|
|
|
|
|
// Call the greeter
|
|
|
|
rsp, err := greeter.Hello(context.TODO(), &proto.HelloRequest{Name: "John"})
|
|
|
|
if err != nil {
|
|
|
|
fmt.Println(err)
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
// Print response
|
|
|
|
fmt.Println(rsp.Greeting)
|
|
|
|
}
|
|
|
|
|
|
|
|
func main() {
|
|
|
|
// Create a new service. Optionally include some options here.
|
|
|
|
service := micro.NewService(
|
|
|
|
micro.Client(client.NewClient(client.Wrap(logWrap))),
|
|
|
|
micro.Server(server.NewServer(server.WrapHandler(logHandlerWrapper))),
|
|
|
|
micro.Name("greeter"),
|
|
|
|
micro.Version("latest"),
|
|
|
|
micro.Metadata(map[string]string{
|
|
|
|
"type": "helloworld",
|
|
|
|
}),
|
|
|
|
|
2016-11-18 17:29:26 +00:00
|
|
|
// Setup some flags. Specify --run_client to run the client
|
2016-01-02 22:32:23 +00:00
|
|
|
|
|
|
|
// Add runtime flags
|
|
|
|
// We could do this below too
|
|
|
|
micro.Flags(cli.BoolFlag{
|
2016-11-18 17:29:26 +00:00
|
|
|
Name: "run_client",
|
2016-01-02 22:32:23 +00:00
|
|
|
Usage: "Launch the client",
|
|
|
|
}),
|
|
|
|
)
|
|
|
|
|
|
|
|
// Init will parse the command line flags. Any flags set will
|
|
|
|
// override the above settings. Options defined here will
|
|
|
|
// override anything set on the command line.
|
|
|
|
service.Init(
|
|
|
|
// Add runtime action
|
|
|
|
// We could actually do this above
|
|
|
|
micro.Action(func(c *cli.Context) {
|
2016-11-18 17:29:26 +00:00
|
|
|
if c.Bool("run_client") {
|
2016-01-02 22:32:23 +00:00
|
|
|
runClient(service)
|
|
|
|
os.Exit(0)
|
|
|
|
}
|
|
|
|
}),
|
|
|
|
)
|
|
|
|
|
|
|
|
// By default we'll run the server unless the flags catch us
|
|
|
|
|
|
|
|
// Setup the server
|
|
|
|
|
|
|
|
// Register handler
|
|
|
|
proto.RegisterGreeterHandler(service.Server(), new(Greeter))
|
|
|
|
|
|
|
|
// Run the server
|
|
|
|
if err := service.Run(); err != nil {
|
|
|
|
fmt.Println(err)
|
|
|
|
}
|
|
|
|
}
|