/
generate_client.go
215 lines (179 loc) · 6.66 KB
/
generate_client.go
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package generator
import (
"google.golang.org/protobuf/compiler/protogen"
"google.golang.org/protobuf/types/descriptorpb"
"strings"
)
type clientGenerator struct {
*Generator
gen *protogen.Plugin
file *protogen.File
g *protogen.GeneratedFile
}
// GenerateFileContent generates the gRPC service definitions, excluding the package statement.
func (m clientGenerator) GenerateFileContent() {
if len(m.file.Services) == 0 {
return
}
for _, service := range m.file.Services {
if GetIsClientExtension(service.Desc.Options()) {
m.genService(service)
}
}
}
func (m clientGenerator) genService(service *protogen.Service) {
m.g.Unskip()
m.genClientImpl(service)
m.genClientConstructor(service)
m.genClientDefinition(service)
m.genDetectSupportedVersion(service)
for _, method := range service.Methods {
m.genMethodHandler(service, method)
}
}
func (m clientGenerator) genHeader(packageName string) {
m.g.P("// Code generated by protoc-gen-go-ras. DO NOT EDIT.")
m.g.P()
m.g.P("package ", packageName)
m.g.P()
}
func (m clientGenerator) genClientImpl(service *protogen.Service) {
m.g.P("type ", m.getClientServiceImp(service), " interface {")
for _, method := range service.Methods {
m.g.P("", method.GoName, "(ctx ", ctxPackage.Ident("Context"), ", req *", method.Input.GoIdent, ") (*", method.Output.GoIdent, ", error)")
}
m.g.P("}")
m.AddImpl(m.getClientServiceImp(service), m.file.GoImportPath)
m.g.P("type ", m.getClientImp(), " interface {")
m.g.P("// Методы для блокировки соединения sync.Mutex")
m.g.P("// берем из sync.Locker ")
m.g.P(syncPackage.Ident("Locker"))
m.g.P("// Методы для записи и чтения из соединение")
m.g.P("// берем из io.ReadWriter")
m.g.P(ioPackage.Ident("ReadWriter"))
m.g.P("}")
m.AddImpl(m.getClientImp(), m.file.GoImportPath)
}
func (m clientGenerator) genClientConstructor(service *protogen.Service) {
serviceName := m.getClientName(service)
m.g.P("func New", serviceName, "(client ", m.getClientImp(), ") ", m.getClientServiceImp(service), "{")
m.g.P("return &", unexport(serviceName), "{")
m.g.P("client: client,")
m.g.P("}")
m.g.P("}")
}
func (m clientGenerator) genClientDefinition(service *protogen.Service) {
serviceName := m.getClientName(service)
m.g.P("// ", serviceName, " is the client for RAS service.")
if service.Desc.Options().(*descriptorpb.ServiceOptions).GetDeprecated() {
m.g.P("//")
m.g.P(deprecationComment)
}
m.g.Annotate(serviceName, service.Location)
m.g.P("type ", unexport(serviceName), " struct {")
m.g.P("client ", m.getClientImp(), "")
m.g.P("}")
m.g.P()
}
func (m clientGenerator) genDetectSupportedVersion(service *protogen.Service) {
serviceName := m.getClientName(service)
m.g.Annotate(serviceName, service.Location)
m.g.P("var serviceVersions = []string{\"3.0\", \"4.0\", \"5.0\", \"6.0\", \"7.0\", \"8.0\", \"9.0\", \"10.0\"}")
m.g.P()
m.g.P("var re = ", regexpPackage.Ident("MustCompile"), "(`(?m)supported=(.*?)]`)")
m.g.P()
m.g.P("// DetectSupportedVersion func helpers detect supported version in EndpointFailureAck")
m.g.P("func DetectSupportedVersion(err error) string {")
m.g.P()
m.g.P("fail, ok := err.(*", m.ObjectNamed("ras.protocol.v1.EndpointFailureAck").GoIdent, ")")
m.g.P("if !ok { return \"\" }")
m.g.P()
m.g.P("if fail.Cause == nil { return \"\" }")
m.g.P()
m.g.P("matches := re.FindAllString(fail.Cause.Message, -1)")
m.g.P()
m.g.P("if len(matches) == 0 { return \"\" }")
m.g.P()
m.g.P("supported := matches[0]")
m.g.P("for i := len(serviceVersions) - 1; i >= 0; i-- {")
m.g.P("version := serviceVersions[i]")
m.g.P("if ", stringsPackage.Ident("Contains"), "(supported, version) { return version }")
m.g.P("}")
m.g.P()
m.g.P("return \"\"")
m.g.P("}")
m.g.P()
}
func (m clientGenerator) genMethodHandler(service *protogen.Service, method *protogen.Method) {
ext := GetClientMethodExtension(method.Desc.Options())
if ext.NewEndpointFunc {
m.genNewEndpointFunc(service, method)
return
}
m.g.P("func (x *", unexport(m.getClientName(service)), ") ", method.GoName, "(ctx ", ctxPackage.Ident("Context"), ", req *", method.Input.GoIdent, ") (*", method.Output.GoIdent, ", error) {")
m.g.P()
m.g.P("x.client.Lock()")
m.g.P("defer x.client.Unlock()")
m.g.P()
m.g.P("// Check context ")
m.g.P("select {")
m.g.P("case <-ctx.Done():")
m.g.P("return nil, ctx.Err()")
m.g.P("default:")
m.g.P("}")
m.g.P("")
if ext.NoPacketPack {
m.g.P("if err := req.", m.formatFuncName, "(x.client, 0 ); err != nil { return nil, err }")
} else {
m.g.P("packet, err := ", method.Input.GoIdent.GoImportPath.Ident("NewPacket"), "(req)")
m.g.P("if err != nil { return nil, err }")
m.g.P("if _, err := packet.WriteTo(x.client); err != nil { return nil, err }")
}
if isEmptyPb(method.Output.Desc) {
m.g.P("return new(", method.Output.GoIdent, "), nil")
m.g.P("}")
return
}
m.g.P("ackPacket, err := ", method.Input.GoIdent.GoImportPath.Ident("NewPacket"), "(x.client)")
m.g.P("if err != nil { return nil, err }")
m.g.P("resp := new(", method.Output.GoIdent, ")")
m.g.P("return resp, ackPacket.Unpack(resp)")
m.g.P("}")
m.g.P()
}
func (m clientGenerator) genNewEndpointFunc(service *protogen.Service, method *protogen.Method) {
m.g.P("func (x *", unexport(m.getClientName(service)), ") ", method.GoName, "(_ ", ctxPackage.Ident("Context"), ", req *", method.Input.GoIdent, ") (*", method.Output.GoIdent, ", error) {")
m.g.P("return &", method.Output.GoIdent, "{")
m.g.P("Service: req.GetService(),")
m.g.P("Version: ", castPackage.Ident("ToInt32"), "(", castPackage.Ident("ToFloat32"), "(req.GetVersion())),")
m.g.P("Id: req.GetEndpointId(),")
m.g.P("Format: ", codecVersion, "(),")
m.g.P("}, nil")
m.g.P("}")
m.g.P()
}
func (m clientGenerator) getClientName(service *protogen.Service) string {
return service.GoName
}
func (m clientGenerator) getClientImp() string {
return "ClientImpl"
}
func (m clientGenerator) getClientServiceImp(service *protogen.Service) string {
return service.GoName + "Impl"
}
func (m clientGenerator) getClientOptionsName(service *protogen.Service) string {
return service.GoName + "Options"
}
func (m clientGenerator) getClientOptionName(service *protogen.Service) string {
return service.GoName + "Option"
}
func (m clientGenerator) getRemoteMockClientName(service *protogen.Service) string {
return service.GoName + "RemoteMockClient"
}
func (m clientGenerator) getMockServerBaseInterfaceName(service *protogen.Service) string {
return service.GoName + "Server"
}
func (m clientGenerator) getMockServiceDescriptorName(service *protogen.Service) string {
return "_" + service.GoName + "_MockServiceDesc"
}
func unexport(s string) string { return strings.ToLower(s[:1]) + s[1:] }