func newEtcd(ns runtime.NegotiatedSerializer, storageVersion, memoryVersion unversioned.GroupVersion, config storagebackend.Config) (etcdStorage storage.Interface, err error) {
s, ok := ns.SerializerForMediaType("application/json", nil)
if !ok {
return nil, fmt.Errorf("unable to find serializer for JSON")
}
encoder := ns.EncoderForVersion(s, storageVersion)
decoder := ns.DecoderToVersion(s, memoryVersion)
if memoryVersion.Group != storageVersion.Group {
// Allow this codec to translate between groups.
if err = versioning.EnableCrossGroupEncoding(encoder, memoryVersion.Group, storageVersion.Group); err != nil {
return nil, fmt.Errorf("error setting up encoder from %v to %v: %v", memoryVersion, storageVersion, err)
}
if err = versioning.EnableCrossGroupDecoding(decoder, storageVersion.Group, memoryVersion.Group); err != nil {
return nil, fmt.Errorf("error setting up decoder from %v to %v: %v", storageVersion, memoryVersion, err)
}
}
config.Codec = runtime.NewCodec(encoder, decoder)
return storagebackend.Create(config)
}
// newStorage is the default implementation for creating a storage backend.
func newStorage(config storagebackend.Config) (etcdStorage storage.Interface, err error) {
return storagebackend.Create(config)
}