// MetaNamespaceKeyFunc is a convenient default KeyFunc which knows how to make
// keys for API objects which implement meta.Interface.
// The key uses the format: <namespace>/<name>
func MetaNamespaceKeyFunc(obj interface{}) (string, error) {
meta, err := meta.Accessor(obj)
if err != nil {
return "", fmt.Errorf("object has no meta: %v", err)
}
if len(meta.Namespace()) > 0 {
return meta.Namespace() + "/" + meta.Name(), nil
}
return meta.Name(), nil
}
// MetaNamespaceKeyFunc is a convenient default KeyFunc which knows how to make
// keys for API objects which implement meta.Interface.
// The key uses the format <namespace>/<name> unless <namespace> is empty, then
// it's just <name>.
//
// TODO: replace key-as-string with a key-as-struct so that this
// packing/unpacking won't be necessary.
func MetaNamespaceKeyFunc(obj interface{}) (string, error) {
if key, ok := obj.(ExplicitKey); ok {
return string(key), nil
}
meta, err := meta.Accessor(obj)
if err != nil {
return "", fmt.Errorf("object has no meta: %v", err)
}
if len(meta.Namespace()) > 0 {
return meta.Namespace() + "/" + meta.Name(), nil
}
return meta.Name(), nil
}
// ResourceFromFile retrieves the name and namespace from a valid file. If the file does not
// resolve to a known type an error is returned. The returned mapping can be used to determine
// the correct REST endpoint to modify this resource with.
func ResourceFromFile(filename string, typer runtime.ObjectTyper, mapper meta.RESTMapper) (mapping *meta.RESTMapping, namespace, name string, data []byte) {
configData, err := ReadConfigData(filename)
checkErr(err)
data = configData
version, kind, err := typer.DataVersionAndKind(data)
checkErr(err)
// TODO: allow unversioned objects?
if len(version) == 0 {
checkErr(fmt.Errorf("The resource in the provided file has no apiVersion defined"))
}
mapping, err = mapper.RESTMapping(version, kind)
checkErr(err)
obj, err := mapping.Codec.Decode(data)
checkErr(err)
meta := mapping.MetadataAccessor
namespace, err = meta.Namespace(obj)
checkErr(err)
name, err = meta.Name(obj)
checkErr(err)
return
}
// nameIndexFunc is an index function that indexes based on an object's name
func nameIndexFunc(obj interface{}) (string, error) {
meta, err := meta.Accessor(obj)
if err != nil {
return "", fmt.Errorf("object has no meta: %v", err)
}
return meta.Name(), nil
}
// GetReference returns an ObjectReference which refers to the given
// object, or an error if the object doesn't follow the conventions
// that would allow this.
func GetReference(obj runtime.Object) (*ObjectReference, error) {
if obj == nil {
return nil, ErrNilObject
}
if ref, ok := obj.(*ObjectReference); ok {
// Don't make a reference to a reference.
return ref, nil
}
meta, err := meta.Accessor(obj)
if err != nil {
return nil, err
}
_, kind, err := Scheme.ObjectVersionAndKind(obj)
if err != nil {
return nil, err
}
version := versionFromSelfLink.FindStringSubmatch(meta.SelfLink())
if len(version) < 2 {
return nil, fmt.Errorf("unexpected self link format: '%v'; got version '%v'", meta.SelfLink(), version)
}
return &ObjectReference{
Kind: kind,
APIVersion: version[1],
Name: meta.Name(),
Namespace: meta.Namespace(),
UID: meta.UID(),
ResourceVersion: meta.ResourceVersion(),
}, nil
}
// watchHandler watches w and keeps *resourceVersion up to date.
func (r *Reflector) watchHandler(w watch.Interface, resourceVersion *string) error {
start := time.Now()
eventCount := 0
for {
event, ok := <-w.ResultChan()
if !ok {
break
}
if event.Type == watch.Error {
return apierrs.FromObject(event.Object)
}
if e, a := r.expectedType, reflect.TypeOf(event.Object); e != a {
glog.Errorf("expected type %v, but watch event object had type %v", e, a)
continue
}
meta, err := meta.Accessor(event.Object)
if err != nil {
glog.Errorf("unable to understand watch event %#v", event)
continue
}
switch event.Type {
case watch.Added:
r.store.Add(meta.Name(), event.Object)
case watch.Modified:
r.store.Update(meta.Name(), event.Object)
case watch.Deleted:
// TODO: Will any consumers need access to the "last known
// state", which is passed in event.Object? If so, may need
// to change this.
r.store.Delete(meta.Name())
default:
glog.Errorf("unable to understand watch event %#v", event)
}
*resourceVersion = meta.ResourceVersion()
eventCount++
}
watchDuration := time.Now().Sub(start)
if watchDuration < 1*time.Second && eventCount == 0 {
glog.V(4).Infof("Unexpected watch close - watch lasted less than a second and no items received")
return errors.New("very short watch")
}
glog.V(4).Infof("Watch close - %v total %v items received", r.expectedType, eventCount)
return nil
}
// GetReference returns an ObjectReference which refers to the given
// object, or an error if the object doesn't follow the conventions
// that would allow this.
// TODO: should take a meta.Interface see https://github.com/GoogleCloudPlatform/kubernetes/issues/7127
func GetReference(obj runtime.Object) (*ObjectReference, error) {
if obj == nil {
return nil, ErrNilObject
}
if ref, ok := obj.(*ObjectReference); ok {
// Don't make a reference to a reference.
return ref, nil
}
meta, err := meta.Accessor(obj)
if err != nil {
return nil, err
}
// if the object referenced is actually persisted, we can just get kind from meta
// if we are building an object reference to something not yet persisted, we should fallback to scheme
kind := meta.Kind()
if kind == "" {
_, kind, err = Scheme.ObjectVersionAndKind(obj)
if err != nil {
return nil, err
}
}
// if the object referenced is actually persisted, we can also get version from meta
version := meta.APIVersion()
if version == "" {
selfLink := meta.SelfLink()
if selfLink == "" {
if ForTesting_ReferencesAllowBlankSelfLinks {
version = "testing"
} else {
return nil, ErrNoSelfLink
}
} else {
selfLinkUrl, err := url.Parse(selfLink)
if err != nil {
return nil, err
}
// example paths: /<prefix>/<version>/*
parts := strings.Split(selfLinkUrl.Path, "/")
if len(parts) < 3 {
return nil, fmt.Errorf("unexpected self link format: '%v'; got version '%v'", selfLink, version)
}
version = parts[2]
}
}
return &ObjectReference{
Kind: kind,
APIVersion: version,
Name: meta.Name(),
Namespace: meta.Namespace(),
UID: meta.UID(),
ResourceVersion: meta.ResourceVersion(),
}, nil
}
// syncWith replaces the store's items with the given list.
func (r *Reflector) syncWith(items []runtime.Object) error {
found := map[string]interface{}{}
for _, item := range items {
meta, err := meta.Accessor(item)
if err != nil {
return fmt.Errorf("unexpected item in list: %v", err)
}
found[meta.Name()] = item
}
r.store.Replace(found)
return nil
}
// ResourceFromFile retrieves the name and namespace from a valid file. If the file does not
// resolve to a known type an error is returned. The returned mapping can be used to determine
// the correct REST endpoint to modify this resource with.
// DEPRECATED: Use resource.Builder
func ResourceFromFile(filename string, typer runtime.ObjectTyper, mapper meta.RESTMapper, schema validation.Schema, cmdVersion string) (mapping *meta.RESTMapping, namespace, name string, data []byte, err error) {
data, err = ReadConfigData(filename)
if err != nil {
return
}
objVersion, kind, err := typer.DataVersionAndKind(data)
if err != nil {
return
}
// TODO: allow unversioned objects?
if len(objVersion) == 0 {
err = fmt.Errorf("the resource in the provided file has no apiVersion defined")
}
err = schema.ValidateBytes(data)
if err != nil {
return
}
// decode using the version stored with the object (allows codec to vary across versions)
mapping, err = mapper.RESTMapping(kind, objVersion)
if err != nil {
return
}
obj, err := mapping.Codec.Decode(data)
if err != nil {
return
}
meta := mapping.MetadataAccessor
namespace, err = meta.Namespace(obj)
if err != nil {
return
}
name, err = meta.Name(obj)
if err != nil {
return
}
// if the preferred API version differs, get a different mapper
if cmdVersion != objVersion {
mapping, err = mapper.RESTMapping(kind, cmdVersion)
}
return
}
// GetReference returns an ObjectReference which refers to the given
// object, or an error if the object doesn't follow the conventions
// that would allow this.
func GetReference(obj runtime.Object) (*ObjectReference, error) {
if obj == nil {
return nil, ErrNilObject
}
if ref, ok := obj.(*ObjectReference); ok {
// Don't make a reference to a reference.
return ref, nil
}
meta, err := meta.Accessor(obj)
if err != nil {
return nil, err
}
_, kind, err := Scheme.ObjectVersionAndKind(obj)
if err != nil {
return nil, err
}
version := ""
parsedSelfLink := versionFromSelfLink.FindStringSubmatch(meta.SelfLink())
if len(parsedSelfLink) < 2 {
if ForTesting_ReferencesAllowBlankSelfLinks {
version = "testing"
} else if meta.SelfLink() == "" {
return nil, ErrNoSelfLink
} else {
return nil, fmt.Errorf("unexpected self link format: '%v'; got version '%v'", meta.SelfLink(), version)
}
} else {
version = parsedSelfLink[1]
}
return &ObjectReference{
Kind: kind,
APIVersion: version,
Name: meta.Name(),
Namespace: meta.Namespace(),
UID: meta.UID(),
ResourceVersion: meta.ResourceVersion(),
}, nil
}
// ResourceFromFile retrieves the name and namespace from a valid file. If the file does not
// resolve to a known type an error is returned. The returned mapping can be used to determine
// the correct REST endpoint to modify this resource with.
func ResourceFromFile(cmd *cobra.Command, filename string, typer runtime.ObjectTyper, mapper meta.RESTMapper, schema validation.Schema) (mapping *meta.RESTMapping, namespace, name string, data []byte) {
configData, err := ReadConfigData(filename)
checkErr(err)
data = configData
objVersion, kind, err := typer.DataVersionAndKind(data)
checkErr(err)
// TODO: allow unversioned objects?
if len(objVersion) == 0 {
checkErr(fmt.Errorf("the resource in the provided file has no apiVersion defined"))
}
err = schema.ValidateBytes(data)
checkErr(err)
// decode using the version stored with the object (allows codec to vary across versions)
mapping, err = mapper.RESTMapping(kind, objVersion)
checkErr(err)
obj, err := mapping.Codec.Decode(data)
checkErr(err)
meta := mapping.MetadataAccessor
namespace, err = meta.Namespace(obj)
checkErr(err)
name, err = meta.Name(obj)
checkErr(err)
// if the preferred API version differs, get a different mapper
version := GetFlagString(cmd, "api-version")
if version != objVersion {
mapping, err = mapper.RESTMapping(kind, version)
checkErr(err)
}
return
}
