ID service (#143)

* Add examples for DB

* add the id service

Co-authored-by: Janos Dobronszki <dobronszki@gmail.com>

id/.gitignore

@@ -0,0 +1,2 @@
+
+id

id/Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine
+ADD id /id
+ENTRYPOINT [ "/id" ]

id/Makefile

@@ -0,0 +1,28 @@
+
+GOPATH:=$(shell go env GOPATH)
+.PHONY: init
+init:
+	go get -u github.com/golang/protobuf/proto
+	go get -u github.com/golang/protobuf/protoc-gen-go
+	go get github.com/micro/micro/v3/cmd/protoc-gen-micro
+	go get github.com/micro/micro/v3/cmd/protoc-gen-openapi
+
+.PHONY: api
+api:
+	protoc --openapi_out=. --proto_path=. proto/id.proto
+
+.PHONY: proto
+proto:
+	protoc --proto_path=. --micro_out=. --go_out=:. proto/id.proto
+	
+.PHONY: build
+build:
+	go build -o id *.go
+
+.PHONY: test
+test:
+	go test -v ./... -cover
+
+.PHONY: docker
+docker:
+	docker build . -t id:latest

id/README.md

@@ -0,0 +1,6 @@
+Generate unique IDs (uuid, snowflake, etc)
+
+# ID Service
+
+The ID service provides unique ID generation. Including uuid, snowflake (64 bit) and bigflake (128 bit)
+

id/generate.go

@@ -0,0 +1,3 @@
+package main
+
+//go:generate make proto

id/handler/id.go

@@ -0,0 +1,78 @@
+package handler
+
+import (
+	"context"
+	"fmt"
+	"math/rand"
+
+	"github.com/teris-io/shortid"
+	"github.com/google/uuid"
+	"github.com/mattheath/kala/bigflake"
+	"github.com/mattheath/kala/snowflake"
+	"github.com/micro/micro/v3/service/logger"
+	"github.com/micro/micro/v3/service/errors"
+	pb "github.com/micro/services/id/proto"
+)
+
+type Id struct {
+	Snowflake *snowflake.Snowflake
+	Bigflake  *bigflake.Bigflake
+}
+
+func New() *Id {
+	id := rand.Intn(100)
+
+	sf, err := snowflake.New(uint32(id))
+	if err != nil {
+		panic(err.Error())
+	}
+	bg, err := bigflake.New(uint64(id))
+	if err != nil {
+		panic(err.Error())
+	}
+
+	return &Id{
+		Snowflake: sf,
+		Bigflake:  bg,
+	}
+}
+
+func (id *Id) Generate(ctx context.Context, req *pb.GenerateRequest, rsp *pb.GenerateResponse) error {
+	if len(req.Type) == 0 {
+		req.Type = "uuid"
+	}
+
+	switch req.Type {
+	case "uuid":
+		rsp.Type = "uuid"
+		rsp.Id = uuid.New().String()
+	case "snowflake":
+		id, err := id.Snowflake.Mint()
+		if err != nil {
+			logger.Errorf("Failed to generate snowflake id: %v", err)
+			return errors.InternalServerError("id.generate", "failed to mint snowflake id")
+		}
+		rsp.Type = "snowflake"
+		rsp.Id = fmt.Sprintf("%v", id)
+	case "bigflake":
+		id, err := id.Bigflake.Mint()
+		if err != nil {
+			logger.Errorf("Failed to generate bigflake id: %v", err)
+			return errors.InternalServerError("id.generate", "failed to mint bigflake id")
+		}
+		rsp.Type = "bigflake"
+		rsp.Id = fmt.Sprintf("%v", id)
+	case "shortid":
+		id, err := shortid.Generate()
+		if err != nil {
+			logger.Errorf("Failed to generate shortid id: %v", err)
+			return errors.InternalServerError("id.generate", "failed to generate short id")
+		}
+		rsp.Type = "shortid"
+		rsp.Id = id
+	default:
+		return errors.BadRequest("id.generate", "unsupported id type")
+	}
+
+	return nil
+}

id/main.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"math/rand"
+	"time"
+
+	"github.com/micro/micro/v3/service"
+	"github.com/micro/micro/v3/service/logger"
+	"github.com/micro/services/id/handler"
+	pb "github.com/micro/services/id/proto"
+)
+
+func init() {
+	rand.Seed(time.Now().UnixNano())
+}
+
+func main() {
+	// Create service
+	srv := service.New(
+		service.Name("id"),
+		service.Version("latest"),
+	)
+
+	// Register handler
+	pb.RegisterIdHandler(srv.Server(), handler.New())
+
+	// Run service
+	if err := srv.Run(); err != nil {
+		logger.Fatal(err)
+	}
+}

id/micro.mu

@@ -0,0 +1 @@
+service id

id/proto/id.pb.go

@@ -0,0 +1,223 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.15.6
+// source: proto/id.proto
+
+package id
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// Generate a unique ID. Defaults to uuid.
+type GenerateRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// type of id e.g uuid, snowflake (64 bit), bigflake (128 bit)
+	Type string `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
+}
+
+func (x *GenerateRequest) Reset() {
+	*x = GenerateRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_id_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GenerateRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GenerateRequest) ProtoMessage() {}
+
+func (x *GenerateRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_id_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GenerateRequest.ProtoReflect.Descriptor instead.
+func (*GenerateRequest) Descriptor() ([]byte, []int) {
+	return file_proto_id_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *GenerateRequest) GetType() string {
+	if x != nil {
+		return x.Type
+	}
+	return ""
+}
+
+type GenerateResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// the unique id generated
+	Id string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	// the type of id generated
+	Type string `protobuf:"bytes,2,opt,name=type,proto3" json:"type,omitempty"`
+}
+
+func (x *GenerateResponse) Reset() {
+	*x = GenerateResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_id_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GenerateResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GenerateResponse) ProtoMessage() {}
+
+func (x *GenerateResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_id_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GenerateResponse.ProtoReflect.Descriptor instead.
+func (*GenerateResponse) Descriptor() ([]byte, []int) {
+	return file_proto_id_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *GenerateResponse) GetId() string {
+	if x != nil {
+		return x.Id
+	}
+	return ""
+}
+
+func (x *GenerateResponse) GetType() string {
+	if x != nil {
+		return x.Type
+	}
+	return ""
+}
+
+var File_proto_id_proto protoreflect.FileDescriptor
+
+var file_proto_id_proto_rawDesc = []byte{
+	0x0a, 0x0e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x69, 0x64, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x12, 0x02, 0x69, 0x64, 0x22, 0x25, 0x0a, 0x0f, 0x47, 0x65, 0x6e, 0x65, 0x72, 0x61, 0x74, 0x65,
+	0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x12, 0x0a, 0x04, 0x74, 0x79, 0x70, 0x65, 0x18,
+	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x74, 0x79, 0x70, 0x65, 0x22, 0x36, 0x0a, 0x10, 0x47,
+	0x65, 0x6e, 0x65, 0x72, 0x61, 0x74, 0x65, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12,
+	0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12,
+	0x12, 0x0a, 0x04, 0x74, 0x79, 0x70, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x74,
+	0x79, 0x70, 0x65, 0x32, 0x3d, 0x0a, 0x02, 0x49, 0x64, 0x12, 0x37, 0x0a, 0x08, 0x47, 0x65, 0x6e,
+	0x65, 0x72, 0x61, 0x74, 0x65, 0x12, 0x13, 0x2e, 0x69, 0x64, 0x2e, 0x47, 0x65, 0x6e, 0x65, 0x72,
+	0x61, 0x74, 0x65, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x14, 0x2e, 0x69, 0x64, 0x2e,
+	0x47, 0x65, 0x6e, 0x65, 0x72, 0x61, 0x74, 0x65, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65,
+	0x22, 0x00, 0x42, 0x0c, 0x5a, 0x0a, 0x2e, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x3b, 0x69, 0x64,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_proto_id_proto_rawDescOnce sync.Once
+	file_proto_id_proto_rawDescData = file_proto_id_proto_rawDesc
+)
+
+func file_proto_id_proto_rawDescGZIP() []byte {
+	file_proto_id_proto_rawDescOnce.Do(func() {
+		file_proto_id_proto_rawDescData = protoimpl.X.CompressGZIP(file_proto_id_proto_rawDescData)
+	})
+	return file_proto_id_proto_rawDescData
+}
+
+var file_proto_id_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_proto_id_proto_goTypes = []interface{}{
+	(*GenerateRequest)(nil),  // 0: id.GenerateRequest
+	(*GenerateResponse)(nil), // 1: id.GenerateResponse
+}
+var file_proto_id_proto_depIdxs = []int32{
+	0, // 0: id.Id.Generate:input_type -> id.GenerateRequest
+	1, // 1: id.Id.Generate:output_type -> id.GenerateResponse
+	1, // [1:2] is the sub-list for method output_type
+	0, // [0:1] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_proto_id_proto_init() }
+func file_proto_id_proto_init() {
+	if File_proto_id_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_proto_id_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GenerateRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_id_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GenerateResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_proto_id_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_proto_id_proto_goTypes,
+		DependencyIndexes: file_proto_id_proto_depIdxs,
+		MessageInfos:      file_proto_id_proto_msgTypes,
+	}.Build()
+	File_proto_id_proto = out.File
+	file_proto_id_proto_rawDesc = nil
+	file_proto_id_proto_goTypes = nil
+	file_proto_id_proto_depIdxs = nil
+}

id/proto/id.pb.micro.go

@@ -0,0 +1,93 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: proto/id.proto
+
+package id
+
+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 Id service
+
+func NewIdEndpoints() []*api.Endpoint {
+	return []*api.Endpoint{}
+}
+
+// Client API for Id service
+
+type IdService interface {
+	Generate(ctx context.Context, in *GenerateRequest, opts ...client.CallOption) (*GenerateResponse, error)
+}
+
+type idService struct {
+	c    client.Client
+	name string
+}
+
+func NewIdService(name string, c client.Client) IdService {
+	return &idService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *idService) Generate(ctx context.Context, in *GenerateRequest, opts ...client.CallOption) (*GenerateResponse, error) {
+	req := c.c.NewRequest(c.name, "Id.Generate", in)
+	out := new(GenerateResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Id service
+
+type IdHandler interface {
+	Generate(context.Context, *GenerateRequest, *GenerateResponse) error
+}
+
+func RegisterIdHandler(s server.Server, hdlr IdHandler, opts ...server.HandlerOption) error {
+	type id interface {
+		Generate(ctx context.Context, in *GenerateRequest, out *GenerateResponse) error
+	}
+	type Id struct {
+		id
+	}
+	h := &idHandler{hdlr}
+	return s.Handle(s.NewHandler(&Id{h}, opts...))
+}
+
+type idHandler struct {
+	IdHandler
+}
+
+func (h *idHandler) Generate(ctx context.Context, in *GenerateRequest, out *GenerateResponse) error {
+	return h.IdHandler.Generate(ctx, in, out)
+}

id/proto/id.proto

@@ -0,0 +1,23 @@
+syntax = "proto3";
+
+package id;
+
+option go_package = "./proto;id";
+
+service Id {
+	rpc Generate(GenerateRequest) returns (GenerateResponse) {}
+}
+
+// Generate a unique ID. Defaults to uuid.
+message GenerateRequest {
+	// type of id e.g uuid, shortid, snowflake (64 bit), bigflake (128 bit)
+	string type = 1;
+}
+
+message GenerateResponse {
+	// the unique id generated
+	string id = 1;
+	// the type of id generated
+	string type = 2;
+}
+