// generateClientSignature returns the client-side signature for a method.
func (g *grpc) generateClientSignature(servName string, method *pb.MethodDescriptorProto) string {
origMethName := method.GetName()
methName := generator.CamelCase(origMethName)
if reservedClientName[methName] {
methName += "_"
}
reqArg := ", in *" + g.typeName(method.GetInputType())
if method.GetClientStreaming() {
reqArg = ""
}
respName := "*" + g.typeName(method.GetOutputType())
if method.GetServerStreaming() || method.GetClientStreaming() {
respName = servName + "_" + generator.CamelCase(origMethName) + "Client"
}
return fmt.Sprintf("%s(ctx %s.Context%s, opts ...%s.CallOption) (%s, error)", methName, contextPkg, reqArg, grpcPkg, respName)
}
func (p *protorpcPlugin) genServiceInterface(
file *generator.FileDescriptor,
svc *descriptor.ServiceDescriptorProto,
) {
const serviceInterfaceTmpl = `
type {{.ServiceName}} interface {
{{.CallMethodList}}
}
`
const callMethodTmpl = `
{{.MethodName}}(in *{{.ArgsType}}, out *{{.ReplyType}}) error`
// gen call method list
var callMethodList string
for _, m := range svc.Method {
out := bytes.NewBuffer([]byte{})
t := template.Must(template.New("").Parse(callMethodTmpl))
t.Execute(out, &struct{ ServiceName, MethodName, ArgsType, ReplyType string }{
ServiceName: generator.CamelCase(svc.GetName()),
MethodName: generator.CamelCase(m.GetName()),
ArgsType: p.TypeName(p.ObjectNamed(m.GetInputType())),
ReplyType: p.TypeName(p.ObjectNamed(m.GetOutputType())),
})
callMethodList += out.String()
p.RecordTypeUse(m.GetInputType())
p.RecordTypeUse(m.GetOutputType())
}
// gen all interface code
{
out := bytes.NewBuffer([]byte{})
t := template.Must(template.New("").Parse(serviceInterfaceTmpl))
t.Execute(out, &struct{ ServiceName, CallMethodList string }{
ServiceName: generator.CamelCase(svc.GetName()),
CallMethodList: callMethodList,
})
p.P(out.String())
}
}
// generateServerSignature returns the server-side signature for a method.
func (g *grpc) generateServerSignature(servName string, method *pb.MethodDescriptorProto) string {
origMethName := method.GetName()
methName := generator.CamelCase(origMethName)
if reservedClientName[methName] {
methName += "_"
}
var reqArgs []string
ret := "error"
if !method.GetServerStreaming() && !method.GetClientStreaming() {
reqArgs = append(reqArgs, contextPkg+".Context")
ret = "(*" + g.typeName(method.GetOutputType()) + ", error)"
}
if !method.GetClientStreaming() {
reqArgs = append(reqArgs, "*"+g.typeName(method.GetInputType()))
}
if method.GetServerStreaming() || method.GetClientStreaming() {
reqArgs = append(reqArgs, servName+"_"+generator.CamelCase(origMethName)+"Server")
}
return methName + "(" + strings.Join(reqArgs, ", ") + ") " + ret
}
func (g *grpc) generateServerMethod(servName string, method *pb.MethodDescriptorProto) string {
methName := generator.CamelCase(method.GetName())
hname := fmt.Sprintf("_%s_%s_Handler", servName, methName)
inType := g.typeName(method.GetInputType())
outType := g.typeName(method.GetOutputType())
if !method.GetServerStreaming() && !method.GetClientStreaming() {
g.P("func ", hname, "(srv interface{}, ctx ", contextPkg, ".Context, dec func(interface{}) error) (interface{}, error) {")
g.P("in := new(", inType, ")")
g.P("if err := dec(in); err != nil { return nil, err }")
g.P("out, err := srv.(", servName, "Server).", methName, "(ctx, in)")
g.P("if err != nil { return nil, err }")
g.P("return out, nil")
g.P("}")
g.P()
return hname
}
streamType := unexport(servName) + methName + "Server"
g.P("func ", hname, "(srv interface{}, stream ", grpcPkg, ".ServerStream) error {")
if !method.GetClientStreaming() {
g.P("m := new(", inType, ")")
g.P("if err := stream.RecvMsg(m); err != nil { return err }")
g.P("return srv.(", servName, "Server).", methName, "(m, &", streamType, "{stream})")
} else {
g.P("return srv.(", servName, "Server).", methName, "(&", streamType, "{stream})")
}
g.P("}")
g.P()
genSend := method.GetServerStreaming()
genSendAndClose := !method.GetServerStreaming()
genRecv := method.GetClientStreaming()
// Stream auxiliary types and methods.
g.P("type ", servName, "_", methName, "Server interface {")
if genSend {
g.P("Send(*", outType, ") error")
}
if genSendAndClose {
g.P("SendAndClose(*", outType, ") error")
}
if genRecv {
g.P("Recv() (*", inType, ", error)")
}
g.P(grpcPkg, ".ServerStream")
g.P("}")
g.P()
g.P("type ", streamType, " struct {")
g.P(grpcPkg, ".ServerStream")
g.P("}")
g.P()
if genSend {
g.P("func (x *", streamType, ") Send(m *", outType, ") error {")
g.P("return x.ServerStream.SendMsg(m)")
g.P("}")
g.P()
}
if genSendAndClose {
g.P("func (x *", streamType, ") SendAndClose(m *", outType, ") error {")
g.P("return x.ServerStream.SendMsg(m)")
g.P("}")
g.P()
}
if genRecv {
g.P("func (x *", streamType, ") Recv() (*", inType, ", error) {")
g.P("m := new(", inType, ")")
g.P("if err := x.ServerStream.RecvMsg(m); err != nil { return nil, err }")
g.P("return m, nil")
g.P("}")
g.P()
}
return hname
}
func (g *grpc) generateClientMethod(servName, fullServName, serviceDescVar string, method *pb.MethodDescriptorProto, descExpr string) {
sname := fmt.Sprintf("/%s/%s", fullServName, method.GetName())
methName := generator.CamelCase(method.GetName())
inType := g.typeName(method.GetInputType())
outType := g.typeName(method.GetOutputType())
g.P("func (c *", unexport(servName), "Client) ", g.generateClientSignature(servName, method), "{")
if !method.GetServerStreaming() && !method.GetClientStreaming() {
g.P("out := new(", outType, ")")
// TODO: Pass descExpr to Invoke.
g.P("err := ", grpcPkg, `.Invoke(ctx, "`, sname, `", in, out, c.cc, opts...)`)
g.P("if err != nil { return nil, err }")
g.P("return out, nil")
g.P("}")
g.P()
return
}
streamType := unexport(servName) + methName + "Client"
g.P("stream, err := ", grpcPkg, ".NewClientStream(ctx, ", descExpr, `, c.cc, "`, sname, `", opts...)`)
g.P("if err != nil { return nil, err }")
g.P("x := &", streamType, "{stream}")
if !method.GetClientStreaming() {
g.P("if err := x.ClientStream.SendMsg(in); err != nil { return nil, err }")
g.P("if err := x.ClientStream.CloseSend(); err != nil { return nil, err }")
}
g.P("return x, nil")
g.P("}")
g.P()
genSend := method.GetClientStreaming()
genRecv := method.GetServerStreaming()
genCloseAndRecv := !method.GetServerStreaming()
// Stream auxiliary types and methods.
g.P("type ", servName, "_", methName, "Client interface {")
if genSend {
g.P("Send(*", inType, ") error")
}
if genRecv {
g.P("Recv() (*", outType, ", error)")
}
if genCloseAndRecv {
g.P("CloseAndRecv() (*", outType, ", error)")
}
g.P(grpcPkg, ".ClientStream")
g.P("}")
g.P()
g.P("type ", streamType, " struct {")
g.P(grpcPkg, ".ClientStream")
g.P("}")
g.P()
if genSend {
g.P("func (x *", streamType, ") Send(m *", inType, ") error {")
g.P("return x.ClientStream.SendMsg(m)")
g.P("}")
g.P()
}
if genRecv {
g.P("func (x *", streamType, ") Recv() (*", outType, ", error) {")
g.P("m := new(", outType, ")")
g.P("if err := x.ClientStream.RecvMsg(m); err != nil { return nil, err }")
g.P("return m, nil")
g.P("}")
g.P()
}
if genCloseAndRecv {
g.P("func (x *", streamType, ") CloseAndRecv() (*", outType, ", error) {")
g.P("if err := x.ClientStream.CloseSend(); err != nil { return nil, err }")
g.P("m := new(", outType, ")")
g.P("if err := x.ClientStream.RecvMsg(m); err != nil { return nil, err }")
g.P("return m, nil")
g.P("}")
g.P()
}
}
// generateService generates all the code for the named service.
func (g *grpc) generateService(file *generator.FileDescriptor, service *pb.ServiceDescriptorProto, index int) {
path := fmt.Sprintf("6,%d", index) // 6 means service.
origServName := service.GetName()
fullServName := origServName
if pkg := file.GetPackage(); pkg != "" {
fullServName = pkg + "." + fullServName
}
servName := generator.CamelCase(origServName)
g.P()
g.P("// Client API for ", servName, " service")
g.P()
// Client interface.
g.P("type ", servName, "Client interface {")
for i, method := range service.Method {
g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service.
g.P(g.generateClientSignature(servName, method))
}
g.P("}")
g.P()
// Client structure.
g.P("type ", unexport(servName), "Client struct {")
g.P("cc *", grpcPkg, ".ClientConn")
g.P("}")
g.P()
// NewClient factory.
g.P("func New", servName, "Client (cc *", grpcPkg, ".ClientConn) ", servName, "Client {")
g.P("return &", unexport(servName), "Client{cc}")
g.P("}")
g.P()
var methodIndex, streamIndex int
serviceDescVar := "_" + servName + "_serviceDesc"
// Client method implementations.
for _, method := range service.Method {
var descExpr string
if !method.GetServerStreaming() && !method.GetClientStreaming() {
// Unary RPC method
descExpr = fmt.Sprintf("&%s.Methods[%d]", serviceDescVar, methodIndex)
methodIndex++
} else {
// Streaming RPC method
descExpr = fmt.Sprintf("&%s.Streams[%d]", serviceDescVar, streamIndex)
streamIndex++
}
g.generateClientMethod(servName, fullServName, serviceDescVar, method, descExpr)
}
g.P("// Server API for ", servName, " service")
g.P()
// Server interface.
serverType := servName + "Server"
g.P("type ", serverType, " interface {")
for i, method := range service.Method {
g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service.
g.P(g.generateServerSignature(servName, method))
}
g.P("}")
g.P()
// Server registration.
g.P("func Register", servName, "Server(s *", grpcPkg, ".Server, srv ", serverType, ") {")
g.P("s.RegisterService(&", serviceDescVar, `, srv)`)
g.P("}")
g.P()
// Server handler implementations.
var handlerNames []string
for _, method := range service.Method {
hname := g.generateServerMethod(servName, method)
handlerNames = append(handlerNames, hname)
}
// Service descriptor.
g.P("var ", serviceDescVar, " = ", grpcPkg, ".ServiceDesc {")
g.P("ServiceName: ", strconv.Quote(fullServName), ",")
g.P("HandlerType: (*", serverType, ")(nil),")
g.P("Methods: []", grpcPkg, ".MethodDesc{")
for i, method := range service.Method {
if method.GetServerStreaming() || method.GetClientStreaming() {
continue
}
g.P("{")
g.P("MethodName: ", strconv.Quote(method.GetName()), ",")
g.P("Handler: ", handlerNames[i], ",")
g.P("},")
}
g.P("},")
g.P("Streams: []", grpcPkg, ".StreamDesc{")
for i, method := range service.Method {
if !method.GetServerStreaming() && !method.GetClientStreaming() {
continue
}
g.P("{")
g.P("StreamName: ", strconv.Quote(method.GetName()), ",")
g.P("Handler: ", handlerNames[i], ",")
if method.GetServerStreaming() {
g.P("ServerStreams: true,")
}
if method.GetClientStreaming() {
g.P("ClientStreams: true,")
}
g.P("},")
}
g.P("},")
g.P("}")
g.P()
}
func (p *protorpcPlugin) genServiceClient(
file *generator.FileDescriptor,
svc *descriptor.ServiceDescriptorProto,
) {
const clientHelperFuncTmpl = `
type {{.ServiceName}}Client struct {
*rpc.Client
}
// New{{.ServiceName}}Client returns a {{.ServiceName}} stub to handle
// requests to the set of {{.ServiceName}} at the other end of the connection.
func New{{.ServiceName}}Client(conn io.ReadWriteCloser) (*{{.ServiceName}}Client) {
c := rpc.NewClientWithCodec(protorpc.NewClientCodec(conn))
return &{{.ServiceName}}Client{c}
}
{{.MethodList}}
// Dial{{.ServiceName}} connects to an {{.ServiceName}} at the specified network address.
func Dial{{.ServiceName}}(network, addr string) (*{{.ServiceName}}Client, error) {
c, err := protorpc.Dial(network, addr)
if err != nil {
return nil, err
}
return &{{.ServiceName}}Client{c}, nil
}
// Dial{{.ServiceName}}Timeout connects to an {{.ServiceName}} at the specified network address.
func Dial{{.ServiceName}}Timeout(network, addr string, timeout time.Duration) (*{{.ServiceName}}Client, error) {
c, err := protorpc.DialTimeout(network, addr, timeout)
if err != nil {
return nil, err
}
return &{{.ServiceName}}Client{c}, nil
}
`
const clientMethodTmpl = `
func (c *{{.ServiceName}}Client) {{.MethodName}}(in *{{.ArgsType}}) (out *{{.ReplyType}}, err error) {
if in == nil {
in = new({{.ArgsType}})
}
out = new({{.ReplyType}})
if err = c.Call("{{.ServiceRegisterName}}.{{.MethodName}}", in, out); err != nil {
return nil, err
}
return out, nil
}`
// gen client method list
var methodList string
for _, m := range svc.Method {
out := bytes.NewBuffer([]byte{})
t := template.Must(template.New("").Parse(clientMethodTmpl))
t.Execute(out, &struct{ ServiceName, ServiceRegisterName, MethodName, ArgsType, ReplyType string }{
ServiceName: generator.CamelCase(svc.GetName()),
ServiceRegisterName: p.makeServiceRegisterName(
file, file.GetPackage(), generator.CamelCase(svc.GetName()),
),
MethodName: generator.CamelCase(m.GetName()),
ArgsType: p.TypeName(p.ObjectNamed(m.GetInputType())),
ReplyType: p.TypeName(p.ObjectNamed(m.GetOutputType())),
})
methodList += out.String()
}
// gen all client code
{
out := bytes.NewBuffer([]byte{})
t := template.Must(template.New("").Parse(clientHelperFuncTmpl))
t.Execute(out, &struct{ PackageName, ServiceName, MethodList string }{
PackageName: file.GetPackage(),
ServiceName: generator.CamelCase(svc.GetName()),
MethodList: methodList,
})
p.P(out.String())
}
}
func (p *protorpcPlugin) genServiceServer(
file *generator.FileDescriptor,
svc *descriptor.ServiceDescriptorProto,
) {
const serviceHelperFunTmpl = `
// Accept{{.ServiceName}}Client accepts connections on the listener and serves requests
// for each incoming connection. Accept blocks; the caller typically
// invokes it in a go statement.
func Accept{{.ServiceName}}Client(lis net.Listener, x {{.ServiceName}}) {
srv := rpc.NewServer()
if err := srv.RegisterName("{{.ServiceRegisterName}}", x); err != nil {
log.Fatal(err)
}
for {
conn, err := lis.Accept()
if err != nil {
log.Fatalf("lis.Accept(): %v\n", err)
}
go srv.ServeCodec(protorpc.NewServerCodec(conn))
}
}
// Register{{.ServiceName}} publish the given {{.ServiceName}} implementation on the server.
func Register{{.ServiceName}}(srv *rpc.Server, x {{.ServiceName}}) error {
if err := srv.RegisterName("{{.ServiceRegisterName}}", x); err != nil {
return err
}
return nil
}
// New{{.ServiceName}}Server returns a new {{.ServiceName}} Server.
func New{{.ServiceName}}Server(x {{.ServiceName}}) *rpc.Server {
srv := rpc.NewServer()
if err := srv.RegisterName("{{.ServiceRegisterName}}", x); err != nil {
log.Fatal(err)
}
return srv
}
// ListenAndServe{{.ServiceName}} listen announces on the local network address laddr
// and serves the given {{.ServiceName}} implementation.
func ListenAndServe{{.ServiceName}}(network, addr string, x {{.ServiceName}}) error {
lis, err := net.Listen(network, addr)
if err != nil {
return err
}
defer lis.Close()
srv := rpc.NewServer()
if err := srv.RegisterName("{{.ServiceRegisterName}}", x); err != nil {
return err
}
for {
conn, err := lis.Accept()
if err != nil {
log.Fatalf("lis.Accept(): %v\n", err)
}
go srv.ServeCodec(protorpc.NewServerCodec(conn))
}
}
`
{
out := bytes.NewBuffer([]byte{})
t := template.Must(template.New("").Parse(serviceHelperFunTmpl))
t.Execute(out, &struct{ PackageName, ServiceName, ServiceRegisterName string }{
PackageName: file.GetPackage(),
ServiceName: generator.CamelCase(svc.GetName()),
ServiceRegisterName: p.makeServiceRegisterName(
file, file.GetPackage(), generator.CamelCase(svc.GetName()),
),
})
p.P(out.String())
}
}
// LHS returns a left-hand-side expression in go for this field.
func (c FieldPathComponent) LHS() string {
if c.Target.Message.File.proto2() {
return fmt.Sprintf("Get%s()", gogen.CamelCase(c.Name))
}
return gogen.CamelCase(c.Name)
}
// RHS returns a right-hand-side expression in go for this field.
func (c FieldPathComponent) RHS() string {
return gogen.CamelCase(c.Name)
}
func camelCase(in string) string {
// Remove any additional underscores, e.g. convert `foo_1` into `foo1`.
return strings.Replace(generator.CamelCase(in), "_", "", -1)
}
func (g *micro) generateServerMethod(servName string, method *pb.MethodDescriptorProto) string {
methName := generator.CamelCase(method.GetName())
hname := fmt.Sprintf("_%s_%s_Handler", servName, methName)
serveType := servName + "Handler"
inType := g.typeName(method.GetInputType())
outType := g.typeName(method.GetOutputType())
if !method.GetServerStreaming() && !method.GetClientStreaming() {
g.P("func (h *", servName, ") ", methName, "(ctx ", contextPkg, ".Context, in *", inType, ", out *", outType, ") error {")
g.P("return h.", serveType, ".", methName, "(ctx, in, out)")
g.P("}")
g.P()
return hname
}
streamType := unexport(servName) + methName + "Stream"
g.P("func (h *", servName, ") ", methName, "(ctx ", contextPkg, ".Context, stream server.Streamer) error {")
if !method.GetClientStreaming() {
g.P("m := new(", inType, ")")
g.P("if err := stream.Recv(m); err != nil { return err }")
g.P("return h.", serveType, ".", methName, "(ctx, m, &", streamType, "{stream})")
} else {
g.P("return h.", serveType, ".", methName, "(ctx, &", streamType, "{stream})")
}
g.P("}")
g.P()
genSend := method.GetServerStreaming()
// genSendAndClose := !method.GetServerStreaming()
genRecv := method.GetClientStreaming()
// Stream auxiliary types and methods.
g.P("type ", servName, "_", methName, "Stream interface {")
g.P("SendMsg(interface{}) error")
g.P("RecvMsg(interface{}) error")
g.P("Close() error")
if genSend {
g.P("Send(*", outType, ") error")
}
/*
if genSendAndClose {
g.P("SendAndClose(*", outType, ") error")
}
*/
if genRecv {
g.P("Recv() (*", inType, ", error)")
}
g.P("}")
g.P()
g.P("type ", streamType, " struct {")
g.P("stream ", serverPkg, ".Streamer")
g.P("}")
g.P()
g.P("func (x *", streamType, ") Close() error {")
g.P("return x.stream.Close()")
g.P("}")
g.P()
g.P("func (x *", streamType, ") SendMsg(m interface{}) error {")
g.P("return x.stream.Send(m)")
g.P("}")
g.P()
g.P("func (x *", streamType, ") RecvMsg(m interface{}) error {")
g.P("return x.stream.Recv(m)")
g.P("}")
g.P()
if genSend {
g.P("func (x *", streamType, ") Send(m *", outType, ") error {")
g.P("return x.stream.Send(m)")
g.P("}")
g.P()
}
/*
if genSendAndClose {
g.P("func (x *", streamType, ") SendAndClose(m *", outType, ") error {")
g.P("return x.Streamer.SendR(m)")
g.P("}")
g.P()
}
*/
if genRecv {
g.P("func (x *", streamType, ") Recv() (*", inType, ", error) {")
g.P("m := new(", inType, ")")
g.P("if err := x.stream.Recv(m); err != nil { return nil, err }")
g.P("return m, nil")
g.P("}")
g.P()
}
return hname
}
func (g *micro) generateClientMethod(reqServ, servName, serviceDescVar string, method *pb.MethodDescriptorProto, descExpr string) {
reqMethod := fmt.Sprintf("%s.%s", servName, method.GetName())
methName := generator.CamelCase(method.GetName())
inType := g.typeName(method.GetInputType())
outType := g.typeName(method.GetOutputType())
g.P("func (c *", unexport(servName), "Client) ", g.generateClientSignature(servName, method), "{")
if !method.GetServerStreaming() && !method.GetClientStreaming() {
g.P(`req := c.c.NewRequest(c.serviceName, "`, reqMethod, `", in)`)
g.P("out := new(", outType, ")")
// TODO: Pass descExpr to Invoke.
g.P("err := ", `c.c.Call(ctx, req, out, opts...)`)
g.P("if err != nil { return nil, err }")
g.P("return out, nil")
g.P("}")
g.P()
return
}
streamType := unexport(servName) + methName + "Client"
g.P(`req := c.c.NewRequest(c.serviceName, "`, reqMethod, `", &`, inType, `{})`)
g.P("stream, err := c.c.Stream(ctx, req, opts...)")
g.P("if err != nil { return nil, err }")
if !method.GetClientStreaming() {
g.P("if err := stream.Send(in); err != nil { return nil, err }")
}
g.P("return &", streamType, "{stream}, nil")
g.P("}")
g.P()
genSend := method.GetClientStreaming()
genRecv := method.GetServerStreaming()
//genCloseAndRecv := !method.GetServerStreaming()
// Stream auxiliary types and methods.
g.P("type ", servName, "_", methName, "Client interface {")
g.P("SendMsg(interface{}) error")
g.P("RecvMsg(interface{}) error")
g.P("Close() error")
if genSend {
g.P("Send(*", inType, ") error")
}
if genRecv {
g.P("Recv() (*", outType, ", error)")
}
g.P("}")
g.P()
g.P("type ", streamType, " struct {")
g.P("stream ", clientPkg, ".Streamer")
g.P("}")
g.P()
g.P("func (x *", streamType, ") Close() error {")
g.P("return x.stream.Close()")
g.P("}")
g.P()
g.P("func (x *", streamType, ") SendMsg(m interface{}) error {")
g.P("return x.stream.Send(m)")
g.P("}")
g.P()
g.P("func (x *", streamType, ") RecvMsg(m interface{}) error {")
g.P("return x.stream.Recv(m)")
g.P("}")
g.P()
if genSend {
g.P("func (x *", streamType, ") Send(m *", inType, ") error {")
g.P("return x.stream.Send(m)")
g.P("}")
g.P()
}
if genRecv {
g.P("func (x *", streamType, ") Recv() (*", outType, ", error) {")
g.P("m := new(", outType, ")")
g.P("err := x.stream.Recv(m)")
g.P("if err != nil {")
g.P("return nil, err")
g.P("}")
g.P("return m, nil")
g.P("}")
g.P()
}
}
// generateService generates all the code for the named service.
func (g *micro) generateService(file *generator.FileDescriptor, service *pb.ServiceDescriptorProto, index int) {
path := fmt.Sprintf("6,%d", index) // 6 means service.
origServName := service.GetName()
serviceName := strings.ToLower(service.GetName())
if pkg := file.GetPackage(); pkg != "" {
serviceName = pkg
}
servName := generator.CamelCase(origServName)
g.P()
g.P("// Client API for ", servName, " service")
g.P()
// Client interface.
g.P("type ", servName, "Client interface {")
for i, method := range service.Method {
g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service.
g.P(g.generateClientSignature(servName, method))
}
g.P("}")
g.P()
// Client structure.
g.P("type ", unexport(servName), "Client struct {")
g.P("c ", clientPkg, ".Client")
g.P("serviceName string")
g.P("}")
g.P()
// NewClient factory.
g.P("func New", servName, "Client (serviceName string, c ", clientPkg, ".Client) ", servName, "Client {")
g.P("if c == nil {")
g.P("c = ", clientPkg, ".NewClient()")
g.P("}")
g.P("if len(serviceName) == 0 {")
g.P(`serviceName = "`, serviceName, `"`)
g.P("}")
g.P("return &", unexport(servName), "Client{")
g.P("c: c,")
g.P("serviceName: serviceName,")
g.P("}")
g.P("}")
g.P()
var methodIndex, streamIndex int
serviceDescVar := "_" + servName + "_serviceDesc"
// Client method implementations.
for _, method := range service.Method {
var descExpr string
if !method.GetServerStreaming() {
// Unary RPC method
descExpr = fmt.Sprintf("&%s.Methods[%d]", serviceDescVar, methodIndex)
methodIndex++
} else {
// Streaming RPC method
descExpr = fmt.Sprintf("&%s.Streams[%d]", serviceDescVar, streamIndex)
streamIndex++
}
g.generateClientMethod(serviceName, servName, serviceDescVar, method, descExpr)
}
g.P("// Server API for ", servName, " service")
g.P()
// Server interface.
serverType := servName + "Handler"
g.P("type ", serverType, " interface {")
for i, method := range service.Method {
g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service.
g.P(g.generateServerSignature(servName, method))
}
g.P("}")
g.P()
// Server registration.
g.P("func Register", servName, "Handler(s ", serverPkg, ".Server, hdlr ", serverType, ", opts ...", serverPkg, ".HandlerOption) {")
g.P("s.Handle(s.NewHandler(&", servName, "{hdlr}, opts...))")
g.P("}")
g.P()
// Handler type
g.P("type ", servName, " struct {")
g.P(serverType)
g.P("}")
g.P()
// Server handler implementations.
var handlerNames []string
for _, method := range service.Method {
hname := g.generateServerMethod(servName, method)
handlerNames = append(handlerNames, hname)
}
/*
// Service descriptor.
g.P("var ", serviceDescVar, " = ", serverPkg, ".ServiceDesc {")
g.P("ServiceName: ", strconv.Quote(fullServName), ",")
g.P("HandlerType: (*", serverType, ")(nil),")
g.P("Methods: []", serverPkg, ".MethodDesc{")
for i, method := range service.Method {
if method.GetServerStreaming() || method.GetClientStreaming() {
continue
}
g.P("{")
g.P("MethodName: ", strconv.Quote(method.GetName()), ",")
g.P("Handler: ", handlerNames[i], ",")
g.P("},")
}
g.P("},")
g.P("Streams: []", serverPkg, ".StreamDesc{")
for i, method := range service.Method {
if !method.GetServerStreaming() && !method.GetClientStreaming() {
continue
}
g.P("{")
g.P("StreamName: ", strconv.Quote(method.GetName()), ",")
g.P("Handler: ", handlerNames[i], ",")
if method.GetServerStreaming() {
g.P("ServerStreams: true,")
}
if method.GetClientStreaming() {
g.P("ClientStreams: true,")
}
g.P("},")
}
g.P("},")
g.P("}")
g.P()
*/
}