/
registry.go
198 lines (166 loc) · 5.04 KB
/
registry.go
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package dyncodec
import (
"errors"
"fmt"
"strings"
"github.com/lavanet/lava/utils"
"google.golang.org/protobuf/reflect/protodesc"
"google.golang.org/protobuf/reflect/protoreflect"
"google.golang.org/protobuf/reflect/protoregistry"
"google.golang.org/protobuf/types/descriptorpb"
"google.golang.org/protobuf/types/dynamicpb"
)
func NewRegistry(remote ProtoFileRegistry) *Registry {
return &Registry{
remote: remote,
prefFiles: new(protoregistry.Files),
prefTypes: new(protoregistry.Types),
}
}
var (
_ protodesc.Resolver = (*Registry)(nil)
_ protoregistry.ExtensionTypeResolver = (*Registry)(nil)
_ protoregistry.MessageTypeResolver = (*Registry)(nil)
)
type ProtoFileRegistry interface {
ProtoFileByPath(path string) (*descriptorpb.FileDescriptorProto, error)
ProtoFileContainingSymbol(name protoreflect.FullName) (*descriptorpb.FileDescriptorProto, error)
Close() error
}
type Registry struct {
// TODO(fdymylja): probably needs to be protected by a mutex.
remote ProtoFileRegistry
prefFiles *protoregistry.Files
prefTypes *protoregistry.Types
}
func (r *Registry) FindExtensionByName(field protoreflect.FullName) (protoreflect.ExtensionType, error) {
// try in types
xt, err := r.prefTypes.FindExtensionByName(field)
if err == nil {
return xt, nil
}
if !errors.Is(err, protoregistry.NotFound) {
return nil, err
}
// not found try in files
xd, err := r.FindDescriptorByName(field)
if err != nil {
return nil, err
}
xdExtensionDescriptor, ok := xd.(protoreflect.ExtensionDescriptor)
if !ok {
return nil, utils.LavaFormatError("Failed converting xd.(protoreflect.ExtensionDescriptor)", nil, utils.Attribute{Key: "xd", Value: xd})
}
xt = dynamicpb.NewExtensionType(xdExtensionDescriptor)
return xt, r.prefTypes.RegisterExtension(xt)
}
func (r *Registry) FindExtensionByNumber(message protoreflect.FullName, field protoreflect.FieldNumber) (protoreflect.ExtensionType, error) {
return nil, fmt.Errorf("not supported")
}
func (r *Registry) FindMessageByName(message protoreflect.FullName) (protoreflect.MessageType, error) {
mt, err := r.prefTypes.FindMessageByName(message)
if err == nil {
return mt, nil
}
if !errors.Is(err, protoregistry.NotFound) {
return nil, err
}
md, err := r.FindDescriptorByName(message)
if err != nil {
return nil, err
}
messageDescriptor, ok := md.(protoreflect.MessageDescriptor)
if !ok {
return nil, utils.LavaFormatError("Failed converting md.(protoreflect.MessageDescriptor)", nil, utils.Attribute{Key: "md", Value: md})
}
mt = dynamicpb.NewMessageType(messageDescriptor)
return mt, r.prefTypes.RegisterMessage(mt)
}
func (r *Registry) FindMessageByURL(url string) (protoreflect.MessageType, error) {
mt, err := r.prefTypes.FindMessageByURL(url)
if err == nil {
return mt, err
}
if !errors.Is(err, protoregistry.NotFound) {
return nil, err
}
message := fullNameFromURL(url)
md, err := r.FindDescriptorByName(message)
if err != nil {
return nil, err
}
messageDescriptor, ok := md.(protoreflect.MessageDescriptor)
if !ok {
return nil, utils.LavaFormatError("Failed converting md.(protoreflect.MessageDescriptor)", nil, utils.Attribute{Key: "md", Value: md})
}
mt = dynamicpb.NewMessageType(messageDescriptor)
return mt, r.prefTypes.RegisterMessage(mt)
}
func (r *Registry) FindFileByPath(s string) (protoreflect.FileDescriptor, error) {
fd, err := r.prefFiles.FindFileByPath(s)
if err == nil {
return fd, nil
}
if !errors.Is(err, protoregistry.NotFound) {
return nil, err
}
dpb, err := r.remote.ProtoFileByPath(s)
if err != nil {
return nil, err
}
fd, err = protodesc.FileOptions{
AllowUnresolvable: true,
}.New(dpb, r)
if err != nil {
return nil, err
}
err = r.prefFiles.RegisterFile(fd)
if err != nil {
return nil, err
}
return fd, nil
}
func (r *Registry) FindDescriptorByName(name protoreflect.FullName) (protoreflect.Descriptor, error) {
desc, err := r.prefFiles.FindDescriptorByName(name)
if err == nil {
return desc, nil
}
if !errors.Is(err, protoregistry.NotFound) {
return nil, err
}
dpb, err := r.remote.ProtoFileContainingSymbol(name)
if err != nil {
return nil, err
}
fd, err := protodesc.FileOptions{
AllowUnresolvable: true,
}.New(dpb, r)
if err != nil {
return nil, err
}
err = r.prefFiles.RegisterFile(fd)
if err != nil {
return nil, err
}
return r.prefFiles.FindDescriptorByName(name)
}
func (r *Registry) Save() (*descriptorpb.FileDescriptorSet, error) {
set := &descriptorpb.FileDescriptorSet{File: make([]*descriptorpb.FileDescriptorProto, 0, r.prefFiles.NumFiles())}
var err error
r.prefFiles.RangeFiles(func(fd protoreflect.FileDescriptor) bool {
set.File = append(set.File, protodesc.ToFileDescriptorProto(fd))
return true
})
return set, err
}
func (r *Registry) Remote() ProtoFileRegistry {
return r.remote
}
// fullNameFromURL returns protoreflect.FullName from proto.Messages' typeURL
func fullNameFromURL(typeURL string) protoreflect.FullName {
message := protoreflect.FullName(typeURL)
if i := strings.LastIndexByte(typeURL, '/'); i >= 0 {
message = message[i+len("/"):]
}
return message
}