兄弟连区块链教程Fabric1.0源代码分析gRPC（Fabric中注册的gRPC Service）一，2018年下半年，区块链行业正逐渐褪去发展之初的浮躁、回归理性，表面上看相关人才需求与身价似乎正在回落。但事实上，正是初期泡沫的渐退，让人们更多的关注点放在了区块链真正的技术之上。
# Fabric 1.0源代码笔记 之 -gRPC（Fabric中注册的gRPC Service）
Peer节点中注册的gRPC Service，包括：
* Events Service（事件服务）：Chat
* Admin Service（管理服务）：GetStatus、StartServer、GetModuleLogLevel、SetModuleLogLevel、RevertLogLevels
* Endorser Service（背书服务）：ProcessProposal
* ChaincodeSupport Service（链码支持服务）：Register
* Gossip Service（Gossip服务）:GossipStream、Ping
Orderer节点中注册的gRPC Service，包括：
* AtomicBroadcast Service（广播服务）：Broadcast、Deliver
## 1、Peer节点中注册的gRPC Service
### 1.1、Events Service（事件服务）
#### 1.1.1、Events Service客户端
```go
type EventsClient interface {
// event chatting using Event
Chat(ctx context.Context, opts ...grpc.CallOption) (Events_ChatClient, error)
}
type eventsClient struct {
cc *grpc.ClientConn
}
func NewEventsClient(cc *grpc.ClientConn) EventsClient {
return &eventsClient{cc}
}
func (c *eventsClient) Chat(ctx context.Context, opts ...grpc.CallOption) (Events_ChatClient, error) {
stream, err := grpc.NewClientStream(ctx, &_Events_serviceDesc.Streams[0], c.cc, "/protos.Events/Chat", opts...)
if err != nil {
return nil, err
}
x := &eventsChatClient{stream}
return x, nil
}
//代码在protos/peer/events.pb.go
```
#### 1.1.2、Events Service服务端
```go
type EventsServer interface {
Chat(Events_ChatServer) error
}
func RegisterEventsServer(s *grpc.Server, srv EventsServer) {
s.RegisterService(&_Events_serviceDesc, srv)
}
func _Events_Chat_Handler(srv interface{}, stream grpc.ServerStream) error {
return srv.(EventsServer).Chat(&eventsChatServer{stream})
}
var _Events_serviceDesc = grpc.ServiceDesc{
ServiceName: "protos.Events",
HandlerType: (*EventsServer)(nil),
Methods: []grpc.MethodDesc{},
Streams: []grpc.StreamDesc{
{
StreamName: "Chat",
Handler: _Events_Chat_Handler,
ServerStreams: true,
ClientStreams: true,
},
},
Metadata: "peer/events.proto",
}
//代码在protos/peer/events.pb.go
```
### 1.2、Admin Service（管理服务）
#### 1.2.1、Admin Service客户端
```go
type AdminClient interface {
// Return the serve status.
GetStatus(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*ServerStatus, error)
StartServer(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*ServerStatus, error)
GetModuleLogLevel(ctx context.Context, in *LogLevelRequest, opts ...grpc.CallOption) (*LogLevelResponse, error)
SetModuleLogLevel(ctx context.Context, in *LogLevelRequest, opts ...grpc.CallOption) (*LogLevelResponse, error)
RevertLogLevels(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*google_protobuf.Empty, error)
}
type adminClient struct {
cc *grpc.ClientConn
}
func NewAdminClient(cc *grpc.ClientConn) AdminClient {
return &adminClient{cc}
}
func (c *adminClient) GetStatus(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*ServerStatus, error) {
out := new(ServerStatus)
err := grpc.Invoke(ctx, "/protos.Admin/GetStatus", in, out, c.cc, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *adminClient) StartServer(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*ServerStatus, error) {
out := new(ServerStatus)
err := grpc.Invoke(ctx, "/protos.Admin/StartServer", in, out, c.cc, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *adminClient) GetModuleLogLevel(ctx context.Context, in *LogLevelRequest, opts ...grpc.CallOption) (*LogLevelResponse, error) {
out := new(LogLevelResponse)
err := grpc.Invoke(ctx, "/protos.Admin/GetModuleLogLevel", in, out, c.cc, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *adminClient) SetModuleLogLevel(ctx context.Context, in *LogLevelRequest, opts ...grpc.CallOption) (*LogLevelResponse, error) {
out := new(LogLevelResponse)
err := grpc.Invoke(ctx, "/protos.Admin/SetModuleLogLevel", in, out, c.cc, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *adminClient) RevertLogLevels(ctx context.Context, in *google_protobuf.Empty, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
out := new(google_protobuf.Empty)
err := grpc.Invoke(ctx, "/protos.Admin/RevertLogLevels", in, out, c.cc, opts...)
if err != nil {
return nil, err
}
return out, nil
}
//代码在protos/peer/admin.pb.go
```
#### 1.2.2、Admin Service服务端
```go
type AdminServer interface {
GetStatus(context.Context, *google_protobuf.Empty) (*ServerStatus, error)
StartServer(context.Context, *google_protobuf.Empty) (*ServerStatus, error)
GetModuleLogLevel(context.Context, *LogLevelRequest) (*LogLevelResponse, error)
SetModuleLogLevel(context.Context, *LogLevelRequest) (*LogLevelResponse, error)
RevertLogLevels(context.Context, *google_protobuf.Empty) (*google_protobuf.Empty, error)
}
func RegisterAdminServer(s *grpc.Server, srv AdminServer) {
s.RegisterService(&_Admin_serviceDesc, srv)
}
func _Admin_GetStatus_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(google_protobuf.Empty)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(AdminServer).GetStatus(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/protos.Admin/GetStatus",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(AdminServer).GetStatus(ctx, req.(*google_protobuf.Empty))
}
return interceptor(ctx, in, info, handler)
}
func _Admin_StartServer_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(google_protobuf.Empty)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(AdminServer).StartServer(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/protos.Admin/StartServer",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(AdminServer).StartServer(ctx, req.(*google_protobuf.Empty))
}
return interceptor(ctx, in, info, handler)
}
func _Admin_GetModuleLogLevel_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(LogLevelRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(AdminServer).GetModuleLogLevel(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/protos.Admin/GetModuleLogLevel",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(AdminServer).GetModuleLogLevel(ctx, req.(*LogLevelRequest))
}
return interceptor(ctx, in, info, handler)
}
func _Admin_SetModuleLogLevel_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(LogLevelRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(AdminServer).SetModuleLogLevel(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/protos.Admin/SetModuleLogLevel",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(AdminServer).SetModuleLogLevel(ctx, req.(*LogLevelRequest))
}
return interceptor(ctx, in, info, handler)
}
func _Admin_RevertLogLevels_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(google_protobuf.Empty)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(AdminServer).RevertLogLevels(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/protos.Admin/RevertLogLevels",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(AdminServer).RevertLogLevels(ctx, req.(*google_protobuf.Empty))
}
return interceptor(ctx, in, info, handler)
}
var _Admin_serviceDesc = grpc.ServiceDesc{
ServiceName: "protos.Admin",
HandlerType: (*AdminServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "GetStatus",
Handler: _Admin_GetStatus_Handler,
},
{
MethodName: "StartServer",
Handler: _Admin_StartServer_Handler,
},
{
MethodName: "GetModuleLogLevel",
Handler: _Admin_GetModuleLogLevel_Handler,
},
{
MethodName: "SetModuleLogLevel",
Handler: _Admin_SetModuleLogLevel_Handler,
},
{
MethodName: "RevertLogLevels",
Handler: _Admin_RevertLogLevels_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "peer/admin.proto",
}
//代码在protos/peer/admin.pb.go
```
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