// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (bool, runtime.Object, error) {
resource := action.GetResource()
kind, err := mapper.KindFor(resource)
// This is a temporary fix. Because there is no internal resource, so
// the caller has no way to express that it expects to get an internal
// kind back. A more proper fix will be directly specify the Kind when
// build the action.
kind.Version = resource.Version
if err != nil {
return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
}
// TODO: have mapper return a Kind for a subresource?
switch castAction := action.(type) {
case ListAction:
kind.Kind += "List"
resource, err := o.Kind(kind, "")
return true, resource, err
case GetAction:
resource, err := o.Kind(kind, castAction.GetName())
return true, resource, err
case DeleteAction:
resource, err := o.Kind(kind, castAction.GetName())
return true, resource, err
case CreateAction:
accessor, err := meta.Accessor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(kind, accessor.GetName())
return true, resource, err
case UpdateAction:
accessor, err := meta.Accessor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(kind, accessor.GetName())
return true, resource, err
default:
return false, nil, fmt.Errorf("no reaction implemented for %s", action)
}
}
}
// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (bool, runtime.Object, error) {
gvk, err := mapper.KindFor(action.GetResource())
if err != nil {
return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
}
// TODO: have mapper return a Kind for a subresource?
switch castAction := action.(type) {
case ListAction:
gvk.Kind += "List"
resource, err := o.Kind(gvk, "")
return true, resource, err
case GetAction:
resource, err := o.Kind(gvk, castAction.GetName())
return true, resource, err
case DeleteAction:
resource, err := o.Kind(gvk, castAction.GetName())
return true, resource, err
case CreateAction:
meta, err := api.ObjectMetaFor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(gvk, meta.Name)
return true, resource, err
case UpdateAction:
meta, err := api.ObjectMetaFor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(gvk, meta.Name)
return true, resource, err
default:
return false, nil, fmt.Errorf("no reaction implemented for %s", action)
}
return true, nil, nil
}
}
// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (bool, runtime.Object, error) {
kind, err := mapper.KindFor(unversioned.GroupVersionResource{Resource: action.GetResource()})
if err != nil {
return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
}
// TODO: have mapper return a Kind for a subresource?
switch castAction := action.(type) {
case ListAction:
kind.Kind += "List"
resource, err := o.Kind(kind, "")
return true, resource, err
case GetAction:
resource, err := o.Kind(kind, castAction.GetName())
return true, resource, err
case DeleteAction:
resource, err := o.Kind(kind, castAction.GetName())
return true, resource, err
case CreateAction:
accessor, err := meta.Accessor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(kind, accessor.GetName())
return true, resource, err
case UpdateAction:
accessor, err := meta.Accessor(castAction.GetObject())
if err != nil {
return true, nil, err
}
resource, err := o.Kind(kind, accessor.GetName())
return true, resource, err
default:
return false, nil, fmt.Errorf("no reaction implemented for %s", action)
}
return true, nil, nil
}
}
// ResolveResource returns the resource type and name of the resourceString.
// If the resource string has no specified type, defaultResource will be returned.
func ResolveResource(defaultResource, resourceString string, mapper meta.RESTMapper) (string, string, error) {
if mapper == nil {
return "", "", errors.New("mapper cannot be nil")
}
var name string
parts := strings.Split(resourceString, "/")
switch len(parts) {
case 1:
name = parts[0]
case 2:
gvk, err := mapper.KindFor(unversioned.GroupVersionResource{Resource: parts[0]})
if err != nil {
return "", "", err
}
name = parts[1]
resource, _ := meta.KindToResource(gvk, false)
return resource.Resource, name, nil
default:
return "", "", fmt.Errorf("invalid resource format: %s", resourceString)
}
return defaultResource, name, nil
}
// ObjectReaction returns a ReactionFunc that applies core.Action to
// the given tracker.
func ObjectReaction(tracker ObjectTracker, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (bool, runtime.Object, error) {
ns := action.GetNamespace()
gvr := action.GetResource()
gvk, err := mapper.KindFor(gvr)
if err != nil {
return false, nil, fmt.Errorf("error getting kind for resource %q: %s", gvr, err)
}
// This is a temporary fix. Because there is no internal resource, so
// the caller has no way to express that it expects to get an internal
// kind back. A more proper fix will be directly specify the Kind when
// build the action.
gvk.Version = gvr.Version
if len(gvk.Version) == 0 {
gvk.Version = runtime.APIVersionInternal
}
// Here and below we need to switch on implementation types,
// not on interfaces, as some interfaces are identical
// (e.g. UpdateAction and CreateAction), so if we use them,
// updates and creates end up matching the same case branch.
switch action := action.(type) {
case ListActionImpl:
obj, err := tracker.List(gvk, ns)
return true, obj, err
case GetActionImpl:
obj, err := tracker.Get(gvk, ns, action.GetName())
return true, obj, err
case CreateActionImpl:
objMeta, err := meta.Accessor(action.GetObject())
if err != nil {
return true, nil, err
}
if action.GetSubresource() == "" {
err = tracker.Create(action.GetObject(), ns)
} else {
// TODO: Currently we're handling subresource creation as an update
// on the enclosing resource. This works for some subresources but
// might not be generic enough.
err = tracker.Update(action.GetObject(), ns)
}
if err != nil {
return true, nil, err
}
obj, err := tracker.Get(gvk, ns, objMeta.GetName())
return true, obj, err
case UpdateActionImpl:
objMeta, err := meta.Accessor(action.GetObject())
if err != nil {
return true, nil, err
}
err = tracker.Update(action.GetObject(), ns)
if err != nil {
return true, nil, err
}
obj, err := tracker.Get(gvk, ns, objMeta.GetName())
return true, obj, err
case DeleteActionImpl:
err := tracker.Delete(gvk, ns, action.GetName())
if err != nil {
return true, nil, err
}
return true, nil, nil
default:
return false, nil, fmt.Errorf("no reaction implemented for %s", action)
}
}
}
