services/wsprd/ipc/server/signature_invoker.go

package server

import (
	"veyron2/ipc"
	"veyron2/security"
)

// signatureInvoker acts as the signature() method and is used to handle calls
// to signature() on behalf of the service
type signatureInvoker struct {
	// signature of the service
	sig ipc.ServiceSignature
}

func (i *signatureInvoker) signature() ipc.ServiceSignature {
	return i.sig
}

// newSignatureInvoker is an invoker factory
func newSignatureInvoker(sig ipc.ServiceSignature) ipc.Invoker {
	return &signatureInvoker{sig}
}

// Prepare implements the Invoker interface.
func (i *signatureInvoker) Prepare(methodName string, _ int) ([]interface{}, security.Label, error) {
	return []interface{}{}, security.ReadLabel, nil
}

// Invoke implements the Invoker interface.
func (i *signatureInvoker) Invoke(methodName string, call ipc.ServerCall, argptrs []interface{}) ([]interface{}, error) {
	return []interface{}{i.signature(), nil}, nil
}