Merge branch 'master' of github.com:chai2010/advanced-go-programming-book

ch2-cgo/ch2-02-basic.md

@@ -1,6 +1,6 @@
 # 2.2 CGO基础
 
-要使用CGO特性，需要安装C／C++构建工具链，在macOS和Linux下是要安装GCC，在windows下是需要安装MinGW工具。同时需要保证环境变量`CGO_ENABLED`被设置为1，这表示CGO是被启用的状态。在本地构建时`CGO_ENABLED`默认是启用的，当交叉构建时CGO默认是禁止的。比如要交叉构建ARM环境运行的Go程序，需要手工设置好C/C++交叉构建的工具链，同时开启`CGO_ENABLED`环境变量。然后通过`import "C"`语句启用CGO特性。
+要使用CGO特性，需要安装C/C++构建工具链，在macOS和Linux下是要安装GCC，在windows下是需要安装MinGW工具。同时需要保证环境变量`CGO_ENABLED`被设置为1，这表示CGO是被启用的状态。在本地构建时`CGO_ENABLED`默认是启用的，当交叉构建时CGO默认是禁止的。比如要交叉构建ARM环境运行的Go程序，需要手工设置好C/C++交叉构建的工具链，同时开启`CGO_ENABLED`环境变量。然后通过`import "C"`语句启用CGO特性。
 
 ## 2.2.1 `import "C"`语句
 
@@ -37,16 +37,17 @@ cgo将当前包引用的C语言符号都放到了虚拟的C包中，同时当前
 ```go
 package cgo_helper
 
+//#include <stdio.h>
 import "C"
 
 type CChar C.char
 
 func (p *CChar) GoString() string {
-    return C.GoString((*C.char)(p))
+	return C.GoString((*C.char)(p))
 }
 
 func PrintCString(cs *C.char) {
-    print(((*CChar)(cs.GoString()))
+	C.puts(cs)
 }
 ```
 
@@ -55,12 +56,12 @@ func PrintCString(cs *C.char) {
 ```go
 package main
 
-// extern char* cs = "hello"
+//char* cs = "hello";
 import "C"
 import "./cgo_helper"
 
 func main() {
-    cgo_helper.PrintCString(C.cs)
+	cgo_helper.PrintCString(C.cs)
 }
 ```
 

vendor/ch4-04/01/client/main.go

@@ -1,24 +0,0 @@
-package main
-
-import (
-	hs "ch4-04/01/helloservice"
-	"context"
-	"fmt"
-	"google.golang.org/grpc"
-	"log"
-)
-
-func main() {
-	conn, err := grpc.Dial("localhost:1234", grpc.WithInsecure())
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer conn.Close()
-
-	client := hs.NewHelloServiceClient(conn)
-	reply, err := client.Hello(context.Background(), &hs.String{Value: "hello"})
-	if err != nil {
-		log.Fatal(err)
-	}
-	fmt.Println(reply.GetValue())
-}

vendor/ch4-04/01/helloservice/hello.pb.go

@@ -1,151 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: hello.proto
-
-package helloservice
-
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
-
-import (
-	context "golang.org/x/net/context"
-	grpc "google.golang.org/grpc"
-)
-
-// 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.ProtoPackageIsVersion2 // please upgrade the proto package
-
-type String struct {
-	Value                string   `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *String) Reset()         { *m = String{} }
-func (m *String) String() string { return proto.CompactTextString(m) }
-func (*String) ProtoMessage()    {}
-func (*String) Descriptor() ([]byte, []int) {
-	return fileDescriptor_hello_c1f637c850550ef7, []int{0}
-}
-func (m *String) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_String.Unmarshal(m, b)
-}
-func (m *String) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_String.Marshal(b, m, deterministic)
-}
-func (dst *String) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_String.Merge(dst, src)
-}
-func (m *String) XXX_Size() int {
-	return xxx_messageInfo_String.Size(m)
-}
-func (m *String) XXX_DiscardUnknown() {
-	xxx_messageInfo_String.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_String proto.InternalMessageInfo
-
-func (m *String) GetValue() string {
-	if m != nil {
-		return m.Value
-	}
-	return ""
-}
-
-func init() {
-	proto.RegisterType((*String)(nil), "helloservice.String")
-}
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ context.Context
-var _ grpc.ClientConn
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion4
-
-// HelloServiceClient is the client API for HelloService service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type HelloServiceClient interface {
-	Hello(ctx context.Context, in *String, opts ...grpc.CallOption) (*String, error)
-}
-
-type helloServiceClient struct {
-	cc *grpc.ClientConn
-}
-
-func NewHelloServiceClient(cc *grpc.ClientConn) HelloServiceClient {
-	return &helloServiceClient{cc}
-}
-
-func (c *helloServiceClient) Hello(ctx context.Context, in *String, opts ...grpc.CallOption) (*String, error) {
-	out := new(String)
-	err := c.cc.Invoke(ctx, "/helloservice.HelloService/Hello", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-// HelloServiceServer is the server API for HelloService service.
-type HelloServiceServer interface {
-	Hello(context.Context, *String) (*String, error)
-}
-
-func RegisterHelloServiceServer(s *grpc.Server, srv HelloServiceServer) {
-	s.RegisterService(&_HelloService_serviceDesc, srv)
-}
-
-func _HelloService_Hello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(String)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(HelloServiceServer).Hello(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/helloservice.HelloService/Hello",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(HelloServiceServer).Hello(ctx, req.(*String))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-var _HelloService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "helloservice.HelloService",
-	HandlerType: (*HelloServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "Hello",
-			Handler:    _HelloService_Hello_Handler,
-		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "hello.proto",
-}
-
-func init() { proto.RegisterFile("hello.proto", fileDescriptor_hello_c1f637c850550ef7) }
-
-var fileDescriptor_hello_c1f637c850550ef7 = []byte{
-	// 108 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0xce, 0x48, 0xcd, 0xc9,
-	0xc9, 0xd7, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x01, 0x73, 0x8a, 0x53, 0x8b, 0xca, 0x32,
-	0x93, 0x53, 0x95, 0xe4, 0xb8, 0xd8, 0x82, 0x4b, 0x8a, 0x32, 0xf3, 0xd2, 0x85, 0x44, 0xb8, 0x58,
-	0xcb, 0x12, 0x73, 0x4a, 0x53, 0x25, 0x18, 0x15, 0x18, 0x35, 0x38, 0x83, 0x20, 0x1c, 0x23, 0x67,
-	0x2e, 0x1e, 0x0f, 0x90, 0xfa, 0x60, 0x88, 0x7a, 0x21, 0x63, 0x2e, 0x56, 0x30, 0x5f, 0x48, 0x44,
-	0x0f, 0xd9, 0x1c, 0x3d, 0x88, 0x21, 0x52, 0x58, 0x45, 0x93, 0xd8, 0xc0, 0x36, 0x1b, 0x03, 0x02,
-	0x00, 0x00, 0xff, 0xff, 0xf7, 0x6b, 0x07, 0xff, 0x88, 0x00, 0x00, 0x00,
-}

vendor/ch4-04/01/helloservice/hello.proto

@@ -1,13 +0,0 @@
-syntax = "proto3";
-
-package helloservice;
-
-message String {
-	string value = 1;
-}
-
-service HelloService {
-	rpc Hello (String) returns (String);
-}
-
-//protoc --go_out=plugins=grpc:. hello.proto

vendor/ch4-04/01/server/main.go

@@ -1,31 +0,0 @@
-package main
-
-import (
-	"context"
-	"log"
-	"net"
-
-	"google.golang.org/grpc"
-
-	hs "ch4-04/01/helloservice"
-)
-
-type HelloServiceImpl struct{}
-
-func (p *HelloServiceImpl) Hello(
-	ctx context.Context, args *hs.String,
-) (*hs.String, error) {
-	reply := &hs.String{Value: "hello:" + args.GetValue()}
-	return reply, nil
-}
-
-func main() {
-	grpcServer := grpc.NewServer()
-	hs.RegisterHelloServiceServer(grpcServer, new(HelloServiceImpl))
-
-	lis, err := net.Listen("tcp", ":1234")
-	if err != nil {
-		log.Fatal(err)
-	}
-	grpcServer.Serve(lis)
-}

vendor/ch4-04/02/HelloService/hello.pb.go

@@ -1,218 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: hello.proto
-
-package HelloService
-
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
-
-import (
-	context "golang.org/x/net/context"
-	grpc "google.golang.org/grpc"
-)
-
-// 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.ProtoPackageIsVersion2 // please upgrade the proto package
-
-type String struct {
-	Value                string   `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *String) Reset()         { *m = String{} }
-func (m *String) String() string { return proto.CompactTextString(m) }
-func (*String) ProtoMessage()    {}
-func (*String) Descriptor() ([]byte, []int) {
-	return fileDescriptor_hello_89b12a75f1fdbbb0, []int{0}
-}
-func (m *String) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_String.Unmarshal(m, b)
-}
-func (m *String) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_String.Marshal(b, m, deterministic)
-}
-func (dst *String) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_String.Merge(dst, src)
-}
-func (m *String) XXX_Size() int {
-	return xxx_messageInfo_String.Size(m)
-}
-func (m *String) XXX_DiscardUnknown() {
-	xxx_messageInfo_String.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_String proto.InternalMessageInfo
-
-func (m *String) GetValue() string {
-	if m != nil {
-		return m.Value
-	}
-	return ""
-}
-
-func init() {
-	proto.RegisterType((*String)(nil), "HelloService.String")
-}
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ context.Context
-var _ grpc.ClientConn
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion4
-
-// HelloServiceClient is the client API for HelloService service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type HelloServiceClient interface {
-	Hello(ctx context.Context, in *String, opts ...grpc.CallOption) (*String, error)
-	Channel(ctx context.Context, opts ...grpc.CallOption) (HelloService_ChannelClient, error)
-}
-
-type helloServiceClient struct {
-	cc *grpc.ClientConn
-}
-
-func NewHelloServiceClient(cc *grpc.ClientConn) HelloServiceClient {
-	return &helloServiceClient{cc}
-}
-
-func (c *helloServiceClient) Hello(ctx context.Context, in *String, opts ...grpc.CallOption) (*String, error) {
-	out := new(String)
-	err := c.cc.Invoke(ctx, "/HelloService.HelloService/Hello", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *helloServiceClient) Channel(ctx context.Context, opts ...grpc.CallOption) (HelloService_ChannelClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_HelloService_serviceDesc.Streams[0], "/HelloService.HelloService/Channel", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &helloServiceChannelClient{stream}
-	return x, nil
-}
-
-type HelloService_ChannelClient interface {
-	Send(*String) error
-	Recv() (*String, error)
-	grpc.ClientStream
-}
-
-type helloServiceChannelClient struct {
-	grpc.ClientStream
-}
-
-func (x *helloServiceChannelClient) Send(m *String) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *helloServiceChannelClient) Recv() (*String, error) {
-	m := new(String)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-// HelloServiceServer is the server API for HelloService service.
-type HelloServiceServer interface {
-	Hello(context.Context, *String) (*String, error)
-	Channel(HelloService_ChannelServer) error
-}
-
-func RegisterHelloServiceServer(s *grpc.Server, srv HelloServiceServer) {
-	s.RegisterService(&_HelloService_serviceDesc, srv)
-}
-
-func _HelloService_Hello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(String)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(HelloServiceServer).Hello(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/HelloService.HelloService/Hello",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(HelloServiceServer).Hello(ctx, req.(*String))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _HelloService_Channel_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(HelloServiceServer).Channel(&helloServiceChannelServer{stream})
-}
-
-type HelloService_ChannelServer interface {
-	Send(*String) error
-	Recv() (*String, error)
-	grpc.ServerStream
-}
-
-type helloServiceChannelServer struct {
-	grpc.ServerStream
-}
-
-func (x *helloServiceChannelServer) Send(m *String) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *helloServiceChannelServer) Recv() (*String, error) {
-	m := new(String)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-var _HelloService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "HelloService.HelloService",
-	HandlerType: (*HelloServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "Hello",
-			Handler:    _HelloService_Hello_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "Channel",
-			Handler:       _HelloService_Channel_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "hello.proto",
-}
-
-func init() { proto.RegisterFile("hello.proto", fileDescriptor_hello_89b12a75f1fdbbb0) }
-
-var fileDescriptor_hello_89b12a75f1fdbbb0 = []byte{
-	// 121 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0xce, 0x48, 0xcd, 0xc9,
-	0xc9, 0xd7, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0xf1, 0x00, 0x71, 0x82, 0x53, 0x8b, 0xca,
-	0x32, 0x93, 0x53, 0x95, 0xe4, 0xb8, 0xd8, 0x82, 0x4b, 0x8a, 0x32, 0xf3, 0xd2, 0x85, 0x44, 0xb8,
-	0x58, 0xcb, 0x12, 0x73, 0x4a, 0x53, 0x25, 0x18, 0x15, 0x18, 0x35, 0x38, 0x83, 0x20, 0x1c, 0xa3,
-	0x3a, 0x2e, 0x14, 0xf5, 0x42, 0xc6, 0x5c, 0xac, 0x60, 0xbe, 0x90, 0x88, 0x1e, 0xb2, 0xb8, 0x1e,
-	0xc4, 0x10, 0x29, 0xac, 0xa2, 0x42, 0x96, 0x5c, 0xec, 0xce, 0x19, 0x89, 0x79, 0x79, 0xa9, 0x39,
-	0xa4, 0x68, 0xd3, 0x60, 0x34, 0x60, 0x4c, 0x62, 0x03, 0x3b, 0xda, 0x18, 0x10, 0x00, 0x00, 0xff,
-	0xff, 0x9a, 0x51, 0x94, 0xb1, 0xc3, 0x00, 0x00, 0x00,
-}

vendor/ch4-04/02/HelloService/hello.proto

@@ -1,14 +0,0 @@
-syntax = "proto3";
-
-package HelloService;
-
-message String {
-	string value = 1;
-}
-
-service HelloService {
-	rpc Hello (String) returns (String);
-	rpc Channel (stream String) returns (stream String);
-}
-
-//protoc --go_out=plugins=grpc:. hello.proto

vendor/ch4-04/02/client/main.go

@@ -1,54 +0,0 @@
-package main
-
-import (
-	"context"
-	"fmt"
-	"io"
-	"log"
-	"time"
-
-	"google.golang.org/grpc"
-
-	hs "ch4-04/02/HelloService"
-)
-
-func main() {
-	conn, err := grpc.Dial("localhost:1234", grpc.WithInsecure())
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer conn.Close()
-
-	client := hs.NewHelloServiceClient(conn)
-	reply, err := client.Hello(context.Background(), &hs.String{Value: "hello"})
-	if err != nil {
-		log.Fatal(err)
-	}
-	fmt.Println(reply.GetValue())
-
-	//grpc stream
-	stream, err := client.Channel(context.Background())
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	go func() {
-		for {
-			if err := stream.Send(&hs.String{Value: "hi"}); err != nil {
-				log.Fatal(err)
-			}
-			time.Sleep(time.Second)
-		}
-	}()
-
-	for {
-		reply, err := stream.Recv()
-		if err != nil {
-			if err == io.EOF {
-				break
-			}
-			log.Fatal(err)
-		}
-		fmt.Println(reply.GetValue())
-	}
-}

vendor/ch4-04/02/server/main.go

@@ -1,53 +0,0 @@
-package main
-
-import (
-	"context"
-	"io"
-	"log"
-	"net"
-
-	"google.golang.org/grpc"
-
-	hs "ch4-04/02/HelloService"
-)
-
-type HelloServiceImpl struct{}
-
-func (p *HelloServiceImpl) Hello(
-	ctx context.Context, args *hs.String,
-) (*hs.String, error) {
-	reply := &hs.String{Value: "hello:" + args.GetValue()}
-	return reply, nil
-}
-
-//grpc stream
-func (p *HelloServiceImpl) Channel(stream hs.HelloService_ChannelServer) error {
-	for {
-		args, err := stream.Recv()
-		if err != nil {
-			if err == io.EOF {
-				return nil
-			}
-			return err
-		}
-
-		reply := &hs.String{Value: "hello:" + args.GetValue()}
-
-		err = stream.Send(reply)
-		if err != nil {
-			return err
-		}
-	}
-}
-
-func main() {
-	grpcServer := grpc.NewServer()
-	hs.RegisterHelloServiceServer(grpcServer, new(HelloServiceImpl))
-
-	lis, err := net.Listen("tcp", ":1234")
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	grpcServer.Serve(lis)
-}

vendor/ch4-04/03/clientpub/main.go

@@ -1,29 +0,0 @@
-package main
-
-import (
-	"context"
-	"log"
-
-	"google.golang.org/grpc"
-
-	pb "ch4-04/03/pubsubservice"
-)
-
-func main() {
-	conn, err := grpc.Dial("localhost:1234", grpc.WithInsecure())
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer conn.Close()
-
-	client := pb.NewPubsubServiceClient(conn)
-
-	_, err = client.Publish(context.Background(), &pb.String{Value: "golang: hello Go"})
-	if err != nil {
-		log.Fatal(err)
-	}
-	_, err = client.Publish(context.Background(), &pb.String{Value: "docker: hello Docker"})
-	if err != nil {
-		log.Fatal(err)
-	}
-}

vendor/ch4-04/03/clientsub/main.go

@@ -1,38 +0,0 @@
-package main
-
-import (
-	"context"
-	"fmt"
-	"io"
-	"log"
-
-	"google.golang.org/grpc"
-
-	pb "ch4-04/03/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())
-	}
-}

vendor/ch4-04/03/pubsubservice/pubsubservice.pb.go

@@ -1,214 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: pubsubservice.proto
-
-package pubsubservice
-
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
-
-import (
-	context "golang.org/x/net/context"
-	grpc "google.golang.org/grpc"
-)
-
-// 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.ProtoPackageIsVersion2 // please upgrade the proto package
-
-type String struct {
-	Value                string   `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *String) Reset()         { *m = String{} }
-func (m *String) String() string { return proto.CompactTextString(m) }
-func (*String) ProtoMessage()    {}
-func (*String) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pubsubservice_f5055945d20b225a, []int{0}
-}
-func (m *String) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_String.Unmarshal(m, b)
-}
-func (m *String) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_String.Marshal(b, m, deterministic)
-}
-func (dst *String) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_String.Merge(dst, src)
-}
-func (m *String) XXX_Size() int {
-	return xxx_messageInfo_String.Size(m)
-}
-func (m *String) XXX_DiscardUnknown() {
-	xxx_messageInfo_String.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_String proto.InternalMessageInfo
-
-func (m *String) GetValue() string {
-	if m != nil {
-		return m.Value
-	}
-	return ""
-}
-
-func init() {
-	proto.RegisterType((*String)(nil), "pubsubservice.String")
-}
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ context.Context
-var _ grpc.ClientConn
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion4
-
-// PubsubServiceClient is the client API for PubsubService service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type PubsubServiceClient interface {
-	Publish(ctx context.Context, in *String, opts ...grpc.CallOption) (*String, error)
-	Subscribe(ctx context.Context, in *String, opts ...grpc.CallOption) (PubsubService_SubscribeClient, error)
-}
-
-type pubsubServiceClient struct {
-	cc *grpc.ClientConn
-}
-
-func NewPubsubServiceClient(cc *grpc.ClientConn) PubsubServiceClient {
-	return &pubsubServiceClient{cc}
-}
-
-func (c *pubsubServiceClient) Publish(ctx context.Context, in *String, opts ...grpc.CallOption) (*String, error) {
-	out := new(String)
-	err := c.cc.Invoke(ctx, "/pubsubservice.PubsubService/Publish", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *pubsubServiceClient) Subscribe(ctx context.Context, in *String, opts ...grpc.CallOption) (PubsubService_SubscribeClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_PubsubService_serviceDesc.Streams[0], "/pubsubservice.PubsubService/Subscribe", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &pubsubServiceSubscribeClient{stream}
-	if err := x.ClientStream.SendMsg(in); err != nil {
-		return nil, err
-	}
-	if err := x.ClientStream.CloseSend(); err != nil {
-		return nil, err
-	}
-	return x, nil
-}
-
-type PubsubService_SubscribeClient interface {
-	Recv() (*String, error)
-	grpc.ClientStream
-}
-
-type pubsubServiceSubscribeClient struct {
-	grpc.ClientStream
-}
-
-func (x *pubsubServiceSubscribeClient) Recv() (*String, error) {
-	m := new(String)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-// PubsubServiceServer is the server API for PubsubService service.
-type PubsubServiceServer interface {
-	Publish(context.Context, *String) (*String, error)
-	Subscribe(*String, PubsubService_SubscribeServer) error
-}
-
-func RegisterPubsubServiceServer(s *grpc.Server, srv PubsubServiceServer) {
-	s.RegisterService(&_PubsubService_serviceDesc, srv)
-}
-
-func _PubsubService_Publish_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(String)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(PubsubServiceServer).Publish(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/pubsubservice.PubsubService/Publish",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(PubsubServiceServer).Publish(ctx, req.(*String))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _PubsubService_Subscribe_Handler(srv interface{}, stream grpc.ServerStream) error {
-	m := new(String)
-	if err := stream.RecvMsg(m); err != nil {
-		return err
-	}
-	return srv.(PubsubServiceServer).Subscribe(m, &pubsubServiceSubscribeServer{stream})
-}
-
-type PubsubService_SubscribeServer interface {
-	Send(*String) error
-	grpc.ServerStream
-}
-
-type pubsubServiceSubscribeServer struct {
-	grpc.ServerStream
-}
-
-func (x *pubsubServiceSubscribeServer) Send(m *String) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-var _PubsubService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "pubsubservice.PubsubService",
-	HandlerType: (*PubsubServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "Publish",
-			Handler:    _PubsubService_Publish_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "Subscribe",
-			Handler:       _PubsubService_Subscribe_Handler,
-			ServerStreams: true,
-		},
-	},
-	Metadata: "pubsubservice.proto",
-}
-
-func init() { proto.RegisterFile("pubsubservice.proto", fileDescriptor_pubsubservice_f5055945d20b225a) }
-
-var fileDescriptor_pubsubservice_f5055945d20b225a = []byte{
-	// 132 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0x2e, 0x28, 0x4d, 0x2a,
-	0x2e, 0x4d, 0x2a, 0x4e, 0x2d, 0x2a, 0xcb, 0x4c, 0x4e, 0xd5, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17,
-	0xe2, 0x45, 0x11, 0x54, 0x92, 0xe3, 0x62, 0x0b, 0x2e, 0x29, 0xca, 0xcc, 0x4b, 0x17, 0x12, 0xe1,
-	0x62, 0x2d, 0x4b, 0xcc, 0x29, 0x4d, 0x95, 0x60, 0x54, 0x60, 0xd4, 0xe0, 0x0c, 0x82, 0x70, 0x8c,
-	0x5a, 0x19, 0xb9, 0x78, 0x03, 0xc0, 0x3a, 0x82, 0x21, 0x3a, 0x84, 0xcc, 0xb9, 0xd8, 0x03, 0x4a,
-	0x93, 0x72, 0x32, 0x8b, 0x33, 0x84, 0x44, 0xf5, 0x50, 0x6d, 0x80, 0x98, 0x24, 0x85, 0x5d, 0x58,
-	0xc8, 0x9a, 0x8b, 0x33, 0xb8, 0x34, 0xa9, 0x38, 0xb9, 0x28, 0x33, 0x29, 0x95, 0x34, 0xad, 0x06,
-	0x8c, 0x49, 0x6c, 0x60, 0xd7, 0x1b, 0x03, 0x02, 0x00, 0x00, 0xff, 0xff, 0x25, 0x3b, 0x39, 0x24,
-	0xd4, 0x00, 0x00, 0x00,
-}

vendor/ch4-04/03/pubsubservice/pubsubservice.proto

@@ -1,14 +0,0 @@
-syntax = "proto3";
-
-package pubsubservice;
-
-message String {
-	string value = 1;
-}
-
-service PubsubService {
-	rpc Publish (String) returns (String);
-	rpc Subscribe (String) returns (stream String);
-}
-
-//protoc --go_out=plugins=grpc:. pubsubservice.proto

vendor/ch4-04/03/server/main.go

@@ -1,70 +0,0 @@
-package main
-
-import (
-	"context"
-	"log"
-	"net"
-	"strings"
-	"time"
-
-	"github.com/docker/docker/pkg/pubsub"
-	"google.golang.org/grpc"
-
-	pb "ch4-04/03/pubsubservice"
-)
-
-type PubsubService struct {
-	pub *pubsub.Publisher
-}
-
-func NewPubsubService() *PubsubService {
-	return &PubsubService{
-		pub: pubsub.NewPublisher(100*time.Millisecond, 10),
-	}
-}
-
-func (p *PubsubService) Publish(
-	ctx context.Context, arg *pb.String,
-) (*pb.String, error) {
-	p.pub.Publish(arg.GetValue())
-	//debug
-	//reply := &String{Value: "<Publish>  " + arg.GetValue()}
-	//fmt.Println(reply.GetValue())
-	return &pb.String{}, nil
-}
-
-func (p *PubsubService) Subscribe(
-	arg *pb.String, stream pb.PubsubService_SubscribeServer,
-) error {
-	ch := p.pub.SubscribeTopic(func(v interface{}) bool {
-		if key, ok := v.(string); ok {
-			//debug
-			//fmt.Printf("<debug> %t %s %s %t\n",
-			//	ok,arg.GetValue(),key,strings.HasPrefix(key,arg.GetValue()))
-			if strings.HasPrefix(key, arg.GetValue()) {
-				return true
-			}
-		}
-		return false
-	})
-
-	for v := range ch {
-		if err := stream.Send(&pb.String{Value: v.(string)}); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func main() {
-	grpcServer := grpc.NewServer()
-	pb.RegisterPubsubServiceServer(grpcServer, NewPubsubService())
-
-	lis, err := net.Listen("tcp", ":1234")
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	grpcServer.Serve(lis)
-}