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Merge pull request #695 from micro/proxy-link

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Support multiple clients in the proxy as Links
This commit is contained in:
Asim Aslam 2019-08-23 14:48:49 +01:00 committed by GitHub
commit 1a32e3a11d
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 255 additions and 123 deletions
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88
client/proto/client.micro.go
View File

@ -31,37 +31,37 @@ var _ context.Context
var _ client.Option
var _ server.Option
// Client API for Micro service
// Client API for Client service
type MicroService interface {
type ClientService interface {
// Call allows a single request to be made
Call(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error)
// Stream is a bidirectional stream
Stream(ctx context.Context, opts ...client.CallOption) (Micro_StreamService, error)
Stream(ctx context.Context, opts ...client.CallOption) (Client_StreamService, error)
// Publish publishes a message and returns an empty Message
Publish(ctx context.Context, in *Message, opts ...client.CallOption) (*Message, error)
}
type microService struct {
type clientService struct {
c client.Client
name string
}
func NewMicroService(name string, c client.Client) MicroService {
func NewClientService(name string, c client.Client) ClientService {
if c == nil {
c = client.NewClient()
}
if len(name) == 0 {
name = "go.micro.client"
}
return &microService{
return &clientService{
c: c,
name: name,
}
}
func (c *microService) Call(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error) {
req := c.c.NewRequest(c.name, "Micro.Call", in)
func (c *clientService) Call(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error) {
req := c.c.NewRequest(c.name, "Client.Call", in)
out := new(Response)
err := c.c.Call(ctx, req, out, opts...)
if err != nil {
@ -70,16 +70,16 @@ func (c *microService) Call(ctx context.Context, in *Request, opts ...client.Cal
return out, nil
}
func (c *microService) Stream(ctx context.Context, opts ...client.CallOption) (Micro_StreamService, error) {
req := c.c.NewRequest(c.name, "Micro.Stream", &Request{})
func (c *clientService) Stream(ctx context.Context, opts ...client.CallOption) (Client_StreamService, error) {
req := c.c.NewRequest(c.name, "Client.Stream", &Request{})
stream, err := c.c.Stream(ctx, req, opts...)
if err != nil {
return nil, err
}
return &microServiceStream{stream}, nil
return &clientServiceStream{stream}, nil
}
type Micro_StreamService interface {
type Client_StreamService interface {
SendMsg(interface{}) error
RecvMsg(interface{}) error
Close() error
@ -87,27 +87,27 @@ type Micro_StreamService interface {
Recv() (*Response, error)
}
type microServiceStream struct {
type clientServiceStream struct {
stream client.Stream
}
func (x *microServiceStream) Close() error {
func (x *clientServiceStream) Close() error {
return x.stream.Close()
}
func (x *microServiceStream) SendMsg(m interface{}) error {
func (x *clientServiceStream) SendMsg(m interface{}) error {
return x.stream.Send(m)
}
func (x *microServiceStream) RecvMsg(m interface{}) error {
func (x *clientServiceStream) RecvMsg(m interface{}) error {
return x.stream.Recv(m)
}
func (x *microServiceStream) Send(m *Request) error {
func (x *clientServiceStream) Send(m *Request) error {
return x.stream.Send(m)
}
func (x *microServiceStream) Recv() (*Response, error) {
func (x *clientServiceStream) Recv() (*Response, error) {
m := new(Response)
err := x.stream.Recv(m)
if err != nil {
@ -116,8 +116,8 @@ func (x *microServiceStream) Recv() (*Response, error) {
return m, nil
}
func (c *microService) Publish(ctx context.Context, in *Message, opts ...client.CallOption) (*Message, error) {
req := c.c.NewRequest(c.name, "Micro.Publish", in)
func (c *clientService) Publish(ctx context.Context, in *Message, opts ...client.CallOption) (*Message, error) {
req := c.c.NewRequest(c.name, "Client.Publish", in)
out := new(Message)
err := c.c.Call(ctx, req, out, opts...)
if err != nil {
@ -126,43 +126,43 @@ func (c *microService) Publish(ctx context.Context, in *Message, opts ...client.
return out, nil
}
// Server API for Micro service
// Server API for Client service
type MicroHandler interface {
type ClientHandler interface {
// Call allows a single request to be made
Call(context.Context, *Request, *Response) error
// Stream is a bidirectional stream
Stream(context.Context, Micro_StreamStream) error
Stream(context.Context, Client_StreamStream) error
// Publish publishes a message and returns an empty Message
Publish(context.Context, *Message, *Message) error
}
func RegisterMicroHandler(s server.Server, hdlr MicroHandler, opts ...server.HandlerOption) error {
type micro interface {
func RegisterClientHandler(s server.Server, hdlr ClientHandler, opts ...server.HandlerOption) error {
type client interface {
Call(ctx context.Context, in *Request, out *Response) error
Stream(ctx context.Context, stream server.Stream) error
Publish(ctx context.Context, in *Message, out *Message) error
}
type Micro struct {
micro
type Client struct {
client
}
h := &microHandler{hdlr}
return s.Handle(s.NewHandler(&Micro{h}, opts...))
h := &clientHandler{hdlr}
return s.Handle(s.NewHandler(&Client{h}, opts...))
}
type microHandler struct {
MicroHandler
type clientHandler struct {
ClientHandler
}
func (h *microHandler) Call(ctx context.Context, in *Request, out *Response) error {
return h.MicroHandler.Call(ctx, in, out)
func (h *clientHandler) Call(ctx context.Context, in *Request, out *Response) error {
return h.ClientHandler.Call(ctx, in, out)
}
func (h *microHandler) Stream(ctx context.Context, stream server.Stream) error {
return h.MicroHandler.Stream(ctx, &microStreamStream{stream})
func (h *clientHandler) Stream(ctx context.Context, stream server.Stream) error {
return h.ClientHandler.Stream(ctx, &clientStreamStream{stream})
}
type Micro_StreamStream interface {
type Client_StreamStream interface {
SendMsg(interface{}) error
RecvMsg(interface{}) error
Close() error
@ -170,27 +170,27 @@ type Micro_StreamStream interface {
Recv() (*Request, error)
}
type microStreamStream struct {
type clientStreamStream struct {
stream server.Stream
}
func (x *microStreamStream) Close() error {
func (x *clientStreamStream) Close() error {
return x.stream.Close()
}
func (x *microStreamStream) SendMsg(m interface{}) error {
func (x *clientStreamStream) SendMsg(m interface{}) error {
return x.stream.Send(m)
}
func (x *microStreamStream) RecvMsg(m interface{}) error {
func (x *clientStreamStream) RecvMsg(m interface{}) error {
return x.stream.Recv(m)
}
func (x *microStreamStream) Send(m *Response) error {
func (x *clientStreamStream) Send(m *Response) error {
return x.stream.Send(m)
}
func (x *microStreamStream) Recv() (*Request, error) {
func (x *clientStreamStream) Recv() (*Request, error) {
m := new(Request)
if err := x.stream.Recv(m); err != nil {
return nil, err
@ -198,6 +198,6 @@ func (x *microStreamStream) Recv() (*Request, error) {
return m, nil
}
func (h *microHandler) Publish(ctx context.Context, in *Message, out *Message) error {
return h.MicroHandler.Publish(ctx, in, out)
func (h *clientHandler) Publish(ctx context.Context, in *Message, out *Message) error {
return h.ClientHandler.Publish(ctx, in, out)
}

118
client/proto/client.pb.go
View File

@ -191,23 +191,23 @@ func init() {
var fileDescriptor_7d733ae29171347b = []byte{
// 270 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x9c, 0x91, 0x3f, 0x4f, 0xc3, 0x30,
0x10, 0xc5, 0xeb, 0xfe, 0x4b, 0x39, 0x2a, 0x21, 0x9d, 0x18, 0x4c, 0x06, 0x54, 0x32, 0x65, 0xc1,
0x45, 0x30, 0x23, 0x86, 0xce, 0x95, 0x50, 0x40, 0xac, 0x28, 0x71, 0x4f, 0xc1, 0x52, 0x6a, 0x9b,
0xd8, 0xad, 0x94, 0xef, 0xc8, 0x87, 0x42, 0x38, 0x29, 0x45, 0xd0, 0x2e, 0x6c, 0xf7, 0xee, 0x67,
0xbd, 0x3b, 0xbf, 0x83, 0x74, 0xad, 0x64, 0x6d, 0xe6, 0xa5, 0xb9, 0x6e, 0x0b, 0x59, 0x29, 0xd2,
0x7e, 0x6e, 0x6b, 0xe3, 0x77, 0x42, 0x04, 0x81, 0x67, 0xa5, 0x11, 0xe1, 0x8d, 0x68, 0xdb, 0xc9,
0x16, 0xa2, 0x8c, 0xde, 0x37, 0xe4, 0x3c, 0x72, 0x88, 0x1c, 0xd5, 0x5b, 0x25, 0x89, 0xb3, 0x19,
0x4b, 0x4f, 0xb2, 0x9d, 0xc4, 0x18, 0x26, 0xa4, 0x57, 0xd6, 0x28, 0xed, 0x79, 0x3f, 0xa0, 0x6f,
0x8d, 0x57, 0x30, 0x95, 0x46, 0x7b, 0xd2, 0xfe, 0xd5, 0x37, 0x96, 0xf8, 0x20, 0xf0, 0xd3, 0xae,
0xf7, 0xdc, 0x58, 0x42, 0x84, 0x61, 0x61, 0x56, 0x0d, 0x1f, 0xce, 0x58, 0x3a, 0xcd, 0x42, 0x9d,
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0x5e, 0x12, 0x9e, 0xc3, 0xc8, 0x1b, 0xab, 0x64, 0xb7, 0x55, 0x2b, 0xfe, 0xcc, 0xed, 0x1f, 0x9f,
0x3b, 0xd8, 0xfb, 0xde, 0x7e, 0x30, 0x18, 0x2d, 0xbf, 0x02, 0xc0, 0x7b, 0x18, 0x2e, 0xf2, 0xaa,
0x42, 0x2e, 0x7e, 0x65, 0x22, 0xba, 0x40, 0xe2, 0x8b, 0x03, 0xa4, 0x5d, 0x39, 0xe9, 0xe1, 0x02,
0xc6, 0x4f, 0xbe, 0xa6, 0x7c, 0xfd, 0x4f, 0x83, 0x94, 0xdd, 0x30, 0x7c, 0x80, 0xe8, 0x71, 0x53,
0x54, 0xca, 0xbd, 0x1d, 0x70, 0xe9, 0xfe, 0x1f, 0x1f, 0x25, 0x49, 0xaf, 0x18, 0x87, 0xb3, 0xde,
0x7d, 0x06, 0x00, 0x00, 0xff, 0xff, 0xd3, 0x63, 0x94, 0x1a, 0x02, 0x02, 0x00, 0x00,
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x9c, 0x91, 0x41, 0x4b, 0xc3, 0x40,
0x10, 0x85, 0xbb, 0x6d, 0x4c, 0xea, 0x58, 0x10, 0x06, 0x0f, 0x6b, 0x0e, 0x52, 0x73, 0xca, 0xc5,
0x54, 0xf4, 0x2c, 0x1e, 0x72, 0x16, 0x24, 0x8a, 0x57, 0x49, 0xb6, 0x43, 0x5c, 0x48, 0x77, 0xd7,
0xec, 0xb6, 0x90, 0x1f, 0xe9, 0x7f, 0x12, 0x36, 0xa9, 0x15, 0x6d, 0x2f, 0xbd, 0xcd, 0x9b, 0x6f,
0x79, 0x33, 0xfb, 0x06, 0xd2, 0x95, 0x14, 0xad, 0x5e, 0xd4, 0xfa, 0xa6, 0x2f, 0x44, 0x23, 0x49,
0xb9, 0x85, 0x69, 0xb5, 0xdb, 0x8a, 0xcc, 0x0b, 0x3c, 0xaf, 0x75, 0xe6, 0xdf, 0x64, 0x7d, 0x3b,
0xd9, 0x40, 0x54, 0xd0, 0xe7, 0x9a, 0xac, 0x43, 0x0e, 0x91, 0xa5, 0x76, 0x23, 0x05, 0x71, 0x36,
0x67, 0xe9, 0x69, 0xb1, 0x95, 0x18, 0xc3, 0x94, 0xd4, 0xd2, 0x68, 0xa9, 0x1c, 0x1f, 0x7b, 0xf4,
0xa3, 0xf1, 0x1a, 0x66, 0x42, 0x2b, 0x47, 0xca, 0xbd, 0xbb, 0xce, 0x10, 0x9f, 0x78, 0x7e, 0x36,
0xf4, 0x5e, 0x3b, 0x43, 0x88, 0x10, 0x54, 0x7a, 0xd9, 0xf1, 0x60, 0xce, 0xd2, 0x59, 0xe1, 0xeb,
0xe4, 0x0a, 0xa6, 0x05, 0x59, 0xa3, 0x95, 0xdd, 0x71, 0xf6, 0x8b, 0xbf, 0x41, 0xf4, 0x44, 0xd6,
0x96, 0x35, 0xe1, 0x05, 0x9c, 0x38, 0x6d, 0xa4, 0x18, 0xb6, 0xea, 0xc5, 0xbf, 0xb9, 0xe3, 0xc3,
0x73, 0x27, 0x3b, 0xdf, 0xbb, 0x2f, 0x06, 0x61, 0xee, 0xbf, 0x8e, 0x0f, 0x10, 0xe4, 0x65, 0xd3,
0x20, 0xcf, 0xfe, 0x84, 0x92, 0x0d, 0x89, 0xc4, 0x97, 0x7b, 0x48, 0xbf, 0x73, 0x32, 0xc2, 0x1c,
0xc2, 0x17, 0xd7, 0x52, 0xb9, 0x3a, 0xd2, 0x20, 0x65, 0xb7, 0x0c, 0x1f, 0x21, 0x7a, 0x5e, 0x57,
0x8d, 0xb4, 0x1f, 0x7b, 0x5c, 0x86, 0x00, 0xe2, 0x83, 0x24, 0x19, 0x55, 0xa1, 0xbf, 0xeb, 0xfd,
0x77, 0x00, 0x00, 0x00, 0xff, 0xff, 0x0a, 0x76, 0x1f, 0x51, 0x03, 0x02, 0x00, 0x00,
}
// Reference imports to suppress errors if they are not otherwise used.
@ -218,59 +218,59 @@ var _ grpc.ClientConn
// is compatible with the grpc package it is being compiled against.
const _ = grpc.SupportPackageIsVersion4
// MicroClient is the client API for Micro service.
// ClientClient is the client API for Client service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
type MicroClient interface {
type ClientClient interface {
// Call allows a single request to be made
Call(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error)
// Stream is a bidirectional stream
Stream(ctx context.Context, opts ...grpc.CallOption) (Micro_StreamClient, error)
Stream(ctx context.Context, opts ...grpc.CallOption) (Client_StreamClient, error)
// Publish publishes a message and returns an empty Message
Publish(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error)
}
type microClient struct {
type clientClient struct {
cc *grpc.ClientConn
}
func NewMicroClient(cc *grpc.ClientConn) MicroClient {
return &microClient{cc}
func NewClientClient(cc *grpc.ClientConn) ClientClient {
return &clientClient{cc}
}
func (c *microClient) Call(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error) {
func (c *clientClient) Call(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error) {
out := new(Response)
err := c.cc.Invoke(ctx, "/go.micro.client.Micro/Call", in, out, opts...)
err := c.cc.Invoke(ctx, "/go.micro.client.Client/Call", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *microClient) Stream(ctx context.Context, opts ...grpc.CallOption) (Micro_StreamClient, error) {
stream, err := c.cc.NewStream(ctx, &_Micro_serviceDesc.Streams[0], "/go.micro.client.Micro/Stream", opts...)
func (c *clientClient) Stream(ctx context.Context, opts ...grpc.CallOption) (Client_StreamClient, error) {
stream, err := c.cc.NewStream(ctx, &_Client_serviceDesc.Streams[0], "/go.micro.client.Client/Stream", opts...)
if err != nil {
return nil, err
}
x := &microStreamClient{stream}
x := &clientStreamClient{stream}
return x, nil
}
type Micro_StreamClient interface {
type Client_StreamClient interface {
Send(*Request) error
Recv() (*Response, error)
grpc.ClientStream
}
type microStreamClient struct {
type clientStreamClient struct {
grpc.ClientStream
}
func (x *microStreamClient) Send(m *Request) error {
func (x *clientStreamClient) Send(m *Request) error {
return x.ClientStream.SendMsg(m)
}
func (x *microStreamClient) Recv() (*Response, error) {
func (x *clientStreamClient) Recv() (*Response, error) {
m := new(Response)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
@ -278,66 +278,66 @@ func (x *microStreamClient) Recv() (*Response, error) {
return m, nil
}
func (c *microClient) Publish(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error) {
func (c *clientClient) Publish(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error) {
out := new(Message)
err := c.cc.Invoke(ctx, "/go.micro.client.Micro/Publish", in, out, opts...)
err := c.cc.Invoke(ctx, "/go.micro.client.Client/Publish", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// MicroServer is the server API for Micro service.
type MicroServer interface {
// ClientServer is the server API for Client service.
type ClientServer interface {
// Call allows a single request to be made
Call(context.Context, *Request) (*Response, error)
// Stream is a bidirectional stream
Stream(Micro_StreamServer) error
Stream(Client_StreamServer) error
// Publish publishes a message and returns an empty Message
Publish(context.Context, *Message) (*Message, error)
}
func RegisterMicroServer(s *grpc.Server, srv MicroServer) {
s.RegisterService(&_Micro_serviceDesc, srv)
func RegisterClientServer(s *grpc.Server, srv ClientServer) {
s.RegisterService(&_Client_serviceDesc, srv)
}
func _Micro_Call_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
func _Client_Call_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Request)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(MicroServer).Call(ctx, in)
return srv.(ClientServer).Call(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/go.micro.client.Micro/Call",
FullMethod: "/go.micro.client.Client/Call",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(MicroServer).Call(ctx, req.(*Request))
return srv.(ClientServer).Call(ctx, req.(*Request))
}
return interceptor(ctx, in, info, handler)
}
func _Micro_Stream_Handler(srv interface{}, stream grpc.ServerStream) error {
return srv.(MicroServer).Stream(&microStreamServer{stream})
func _Client_Stream_Handler(srv interface{}, stream grpc.ServerStream) error {
return srv.(ClientServer).Stream(&clientStreamServer{stream})
}
type Micro_StreamServer interface {
type Client_StreamServer interface {
Send(*Response) error
Recv() (*Request, error)
grpc.ServerStream
}
type microStreamServer struct {
type clientStreamServer struct {
grpc.ServerStream
}
func (x *microStreamServer) Send(m *Response) error {
func (x *clientStreamServer) Send(m *Response) error {
return x.ServerStream.SendMsg(m)
}
func (x *microStreamServer) Recv() (*Request, error) {
func (x *clientStreamServer) Recv() (*Request, error) {
m := new(Request)
if err := x.ServerStream.RecvMsg(m); err != nil {
return nil, err
@ -345,41 +345,41 @@ func (x *microStreamServer) Recv() (*Request, error) {
return m, nil
}
func _Micro_Publish_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
func _Client_Publish_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Message)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(MicroServer).Publish(ctx, in)
return srv.(ClientServer).Publish(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/go.micro.client.Micro/Publish",
FullMethod: "/go.micro.client.Client/Publish",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(MicroServer).Publish(ctx, req.(*Message))
return srv.(ClientServer).Publish(ctx, req.(*Message))
}
return interceptor(ctx, in, info, handler)
}
var _Micro_serviceDesc = grpc.ServiceDesc{
ServiceName: "go.micro.client.Micro",
HandlerType: (*MicroServer)(nil),
var _Client_serviceDesc = grpc.ServiceDesc{
ServiceName: "go.micro.client.Client",
HandlerType: (*ClientServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "Call",
Handler: _Micro_Call_Handler,
Handler: _Client_Call_Handler,
},
{
MethodName: "Publish",
Handler: _Micro_Publish_Handler,
Handler: _Client_Publish_Handler,
},
},
Streams: []grpc.StreamDesc{
{
StreamName: "Stream",
Handler: _Micro_Stream_Handler,
Handler: _Client_Stream_Handler,
ServerStreams: true,
ClientStreams: true,
},

4
client/proto/client.proto
View File

@ -2,8 +2,8 @@ syntax = "proto3";
package go.micro.client;
// Micro is the micro client interface
service Micro {
// Client is the micro client interface
service Client {
// Call allows a single request to be made
rpc Call(Request) returns (Response) {};
// Stream is a bidirectional stream

5
proxy/grpc/grpc.go
View File

@ -10,6 +10,7 @@ import (
"github.com/micro/go-micro/client/grpc"
"github.com/micro/go-micro/codec"
"github.com/micro/go-micro/config/options"
"github.com/micro/go-micro/errors"
"github.com/micro/go-micro/proxy"
"github.com/micro/go-micro/server"
)
@ -61,6 +62,10 @@ func readLoop(r server.Request, s client.Stream) error {
}
}
func (p *Proxy) SendRequest(ctx context.Context, req client.Request, rsp client.Response) error {
return errors.InternalServerError("go.micro.proxy.grpc", "SendRequest is unsupported")
}
// ServeRequest honours the server.Proxy interface
func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server.Response) error {
// set default client

5
proxy/http/http.go
View File

@ -10,6 +10,7 @@ import (
"net/url"
"path"
"github.com/micro/go-micro/client"
"github.com/micro/go-micro/config/options"
"github.com/micro/go-micro/errors"
"github.com/micro/go-micro/proxy"
@ -44,6 +45,10 @@ func getEndpoint(hdr map[string]string) string {
return ""
}
func (p *Proxy) SendRequest(ctx context.Context, req client.Request, rsp client.Response) error {
return errors.InternalServerError("go.micro.proxy.http", "SendRequest is unsupported")
}
// ServeRequest honours the server.Router interface
func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server.Response) error {
if p.Endpoint == "" {

139
proxy/mucp/mucp.go
View File

@ -5,6 +5,7 @@ import (
"context"
"fmt"
"io"
"sort"
"strings"
"sync"
@ -12,6 +13,7 @@ import (
"github.com/micro/go-micro/codec"
"github.com/micro/go-micro/codec/bytes"
"github.com/micro/go-micro/config/options"
"github.com/micro/go-micro/errors"
"github.com/micro/go-micro/proxy"
"github.com/micro/go-micro/router"
"github.com/micro/go-micro/server"
@ -26,9 +28,12 @@ type Proxy struct {
// Endpoint specifies the fixed service endpoint to call.
Endpoint string
// The client to use for outbound requests
// The client to use for outbound requests in the local network
Client client.Client
// Links are used for outbound requests not in the local network
Links map[string]client.Client
// The router for routes
Router router.Router
@ -76,7 +81,7 @@ func readLoop(r server.Request, s client.Stream) error {
}
// toNodes returns a list of node addresses from given routes
func toNodes(routes map[uint64]router.Route) []string {
func toNodes(routes []router.Route) []string {
var nodes []string
for _, node := range routes {
address := node.Address
@ -88,15 +93,37 @@ func toNodes(routes map[uint64]router.Route) []string {
return nodes
}
func (p *Proxy) getRoute(service string) ([]string, error) {
func (p *Proxy) getLink(r router.Route) (client.Client, error) {
if r.Link == "local" || len(p.Links) == 0 {
return p.Client, nil
}
l, ok := p.Links[r.Link]
if !ok {
return nil, errors.InternalServerError("go.micro.proxy", "link not found")
}
return l, nil
}
func (p *Proxy) getRoute(service string) ([]router.Route, error) {
toSlice := func(r map[uint64]router.Route) []router.Route {
var routes []router.Route
for _, v := range r {
routes = append(routes, v)
}
// sort the routes in order of metric
sort.Slice(routes, func(i, j int) bool { return routes[i].Metric < routes[j].Metric })
return routes
}
// lookup the route cache first
p.Lock()
routes, ok := p.Routes[service]
if ok {
p.Unlock()
return toNodes(routes), nil
return toSlice(routes), nil
}
p.Routes[service] = make(map[uint64]router.Route)
p.Unlock()
// lookup the routes in the router
@ -113,12 +140,16 @@ func (p *Proxy) getRoute(service string) ([]string, error) {
// update the proxy cache
p.Lock()
for _, route := range results {
// create if does not exist
if _, ok := p.Routes[service]; !ok {
p.Routes[service] = make(map[uint64]router.Route)
}
p.Routes[service][route.Hash()] = route
}
routes = p.Routes[service]
p.Unlock()
return toNodes(routes), nil
return toSlice(routes), nil
}
// manageRouteCache applies action on a given route to Proxy route cache
@ -171,12 +202,27 @@ func (p *Proxy) watchRoutes() {
}
}
func (p *Proxy) SendRequest(ctx context.Context, req client.Request, rsp client.Response) error {
return errors.InternalServerError("go.micro.proxy", "SendRequest is unsupported")
}
// ServeRequest honours the server.Router interface
func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server.Response) error {
// service name
service := req.Service()
endpoint := req.Endpoint()
// determine if its local routing
var local bool
// address to call
var addresses []string
// routes
var routes []router.Route
// service name to call
service := req.Service()
// endpoint to call
endpoint := req.Endpoint()
// are we network routing or local routing
if len(p.Links) == 0 {
local = true
}
// call a specific backend endpoint either by name or address
if len(p.Endpoint) > 0 {
@ -190,7 +236,7 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
return err
}
// set the address
addresses = addr
routes = addr
// set the name
service = p.Endpoint
}
@ -201,16 +247,66 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
if err != nil {
return err
}
addresses = addr
routes = addr
}
var opts []client.CallOption
// set address if available
// if the address is already set just serve it
// TODO: figure it out if we should know to pick a link
if len(addresses) > 0 {
opts = append(opts, client.WithAddress(addresses...))
// serve the normal way
return p.serveRequest(ctx, p.Client, service, endpoint, req, rsp, client.WithAddress(addresses...))
}
// there's no links e.g we're local routing then just serve it with addresses
if local {
var opts []client.CallOption
// set address if available via routes or specific endpoint
if len(routes) > 0 {
addresses := toNodes(routes)
opts = append(opts, client.WithAddress(addresses...))
}
// serve the normal way
return p.serveRequest(ctx, p.Client, service, endpoint, req, rsp, opts...)
}
var gerr error
// we're routing globally with multiple links
// so we need to pick a link per route
for _, route := range routes {
// pick the link or error out
link, err := p.getLink(route)
if err != nil {
// ok let's try again
gerr = err
continue
}
// set the address to call
addresses := toNodes([]router.Route{route})
// do the request with the link
gerr = p.serveRequest(ctx, link, service, endpoint, req, rsp, client.WithAddress(addresses...))
// return on no error since we succeeded
if gerr == nil {
return nil
}
// return where the context deadline was exceeded
if gerr == context.Canceled || gerr == context.DeadlineExceeded {
return err
}
// otherwise attempt to do it all over again
}
// if we got here something went really badly wrong
return gerr
}
func (p *Proxy) serveRequest(ctx context.Context, link client.Client, service, endpoint string, req server.Request, rsp server.Response, opts ...client.CallOption) error {
// read initial request
body, err := req.Read()
if err != nil {
@ -218,14 +314,14 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
}
// create new request with raw bytes body
creq := p.Client.NewRequest(service, endpoint, &bytes.Frame{body}, client.WithContentType(req.ContentType()))
creq := link.NewRequest(service, endpoint, &bytes.Frame{body}, client.WithContentType(req.ContentType()))
// not a stream so make a client.Call request
if !req.Stream() {
crsp := new(bytes.Frame)
// make a call to the backend
if err := p.Client.Call(ctx, creq, crsp, opts...); err != nil {
if err := link.Call(ctx, creq, crsp, opts...); err != nil {
return err
}
@ -238,7 +334,7 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
}
// create new stream
stream, err := p.Client.Stream(ctx, creq, opts...)
stream, err := link.Stream(ctx, creq, opts...)
if err != nil {
return err
}
@ -300,6 +396,7 @@ func NewSingleHostProxy(endpoint string) *Proxy {
// NewProxy returns a new proxy which will route based on mucp headers
func NewProxy(opts ...options.Option) proxy.Proxy {
p := new(Proxy)
p.Links = map[string]client.Client{}
p.Options = options.NewOptions(opts...)
p.Options.Init(options.WithString("mucp"))
@ -320,6 +417,12 @@ func NewProxy(opts ...options.Option) proxy.Proxy {
p.Client = client.DefaultClient
}
// get client
links, ok := p.Options.Values().Get("proxy.links")
if ok {
p.Links = links.(map[string]client.Client)
}
// get router
r, ok := p.Options.Values().Get("proxy.router")
if ok {

19
proxy/proxy.go
View File

@ -13,6 +13,8 @@ import (
// Proxy can be used as a proxy server for go-micro services
type Proxy interface {
options.Options
// SendRequest honours the client.Router interface
SendRequest(context.Context, client.Request, client.Response) error
// ServeRequest honours the server.Router interface
ServeRequest(context.Context, server.Request, server.Response) error
}
@ -35,3 +37,20 @@ func WithClient(c client.Client) options.Option {
func WithRouter(r router.Router) options.Option {
return options.WithValue("proxy.router", r)
}
// WithLink sets a link for outbound requests
func WithLink(name string, c client.Client) options.Option {
return func(o *options.Values) error {
var links map[string]client.Client
v, ok := o.Get("proxy.links")
if ok {
links = v.(map[string]client.Client)
} else {
links = map[string]client.Client{}
}
links[name] = c
// save the links
o.Set("proxy.links", links)
return nil
}
}