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registry.go
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/
registry.go
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package registry
import (
"errors"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
pbcore "github.com/cncf/xds/go/xds/core/v3"
"github.com/envoyproxy/go-control-plane/xdsmatcher/pkg/matcher/types"
)
type RegistryType map[string]func(proto.Message) (interface{}, error)
var InputExtensions = make(RegistryType)
var ActionExtensions = make(RegistryType)
func ResolveInputExtension(tec *pbcore.TypedExtensionConfig) (types.DataInput, error) {
out, err := resolveExtension(tec, InputExtensions)
if err != nil {
return nil, err
}
return out.(types.DataInput), nil
}
func ResolveActionExtension(tec *pbcore.TypedExtensionConfig) (types.Action, error) {
return resolveExtension(tec, ActionExtensions)
}
func resolveExtension(tec *pbcore.TypedExtensionConfig, registry RegistryType) (interface{}, error) {
factory, ok := registry[tec.TypedConfig.TypeUrl]
if !ok {
return nil, errors.New("extension not implemented: extension " + tec.TypedConfig.TypeUrl)
}
m, err := anypb.UnmarshalNew(tec.TypedConfig, proto.UnmarshalOptions{})
if err != nil {
return nil, err
}
return factory(m)
}