add a ping service (#372)

* add a ping service

* add examples and public api file

* add minecraft server ping

minecraft/proto/minecraft.pb.micro.go

@@ -0,0 +1,93 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: proto/minecraft.proto
+
+package minecraft
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
+
+import (
+	context "context"
+	api "github.com/micro/micro/v3/service/api"
+	client "github.com/micro/micro/v3/service/client"
+	server "github.com/micro/micro/v3/service/server"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ api.Endpoint
+var _ context.Context
+var _ client.Option
+var _ server.Option
+
+// Api Endpoints for Minecraft service
+
+func NewMinecraftEndpoints() []*api.Endpoint {
+	return []*api.Endpoint{}
+}
+
+// Client API for Minecraft service
+
+type MinecraftService interface {
+	Ping(ctx context.Context, in *PingRequest, opts ...client.CallOption) (*PingResponse, error)
+}
+
+type minecraftService struct {
+	c    client.Client
+	name string
+}
+
+func NewMinecraftService(name string, c client.Client) MinecraftService {
+	return &minecraftService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *minecraftService) Ping(ctx context.Context, in *PingRequest, opts ...client.CallOption) (*PingResponse, error) {
+	req := c.c.NewRequest(c.name, "Minecraft.Ping", in)
+	out := new(PingResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Minecraft service
+
+type MinecraftHandler interface {
+	Ping(context.Context, *PingRequest, *PingResponse) error
+}
+
+func RegisterMinecraftHandler(s server.Server, hdlr MinecraftHandler, opts ...server.HandlerOption) error {
+	type minecraft interface {
+		Ping(ctx context.Context, in *PingRequest, out *PingResponse) error
+	}
+	type Minecraft struct {
+		minecraft
+	}
+	h := &minecraftHandler{hdlr}
+	return s.Handle(s.NewHandler(&Minecraft{h}, opts...))
+}
+
+type minecraftHandler struct {
+	MinecraftHandler
+}
+
+func (h *minecraftHandler) Ping(ctx context.Context, in *PingRequest, out *PingResponse) error {
+	return h.MinecraftHandler.Ping(ctx, in, out)
+}