mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-01 04:41:22 +00:00
105 lines
3.0 KiB
Go
105 lines
3.0 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package meta
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
)
|
|
|
|
// lazyObject defers loading the mapper and typer until necessary.
|
|
type lazyObject struct {
|
|
loader func() (RESTMapper, error)
|
|
|
|
lock sync.Mutex
|
|
loaded bool
|
|
err error
|
|
mapper RESTMapper
|
|
}
|
|
|
|
// NewLazyObjectLoader handles unrecoverable errors when creating a RESTMapper / ObjectTyper by
|
|
// returning those initialization errors when the interface methods are invoked. This defers the
|
|
// initialization and any server calls until a client actually needs to perform the action.
|
|
func NewLazyRESTMapperLoader(fn func() (RESTMapper, error)) RESTMapper {
|
|
obj := &lazyObject{loader: fn}
|
|
return obj
|
|
}
|
|
|
|
// init lazily loads the mapper and typer, returning an error if initialization has failed.
|
|
func (o *lazyObject) init() error {
|
|
o.lock.Lock()
|
|
defer o.lock.Unlock()
|
|
if o.loaded {
|
|
return o.err
|
|
}
|
|
o.mapper, o.err = o.loader()
|
|
o.loaded = true
|
|
return o.err
|
|
}
|
|
|
|
var _ RESTMapper = &lazyObject{}
|
|
|
|
func (o *lazyObject) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
|
|
if err := o.init(); err != nil {
|
|
return schema.GroupVersionKind{}, err
|
|
}
|
|
return o.mapper.KindFor(resource)
|
|
}
|
|
|
|
func (o *lazyObject) KindsFor(resource schema.GroupVersionResource) ([]schema.GroupVersionKind, error) {
|
|
if err := o.init(); err != nil {
|
|
return []schema.GroupVersionKind{}, err
|
|
}
|
|
return o.mapper.KindsFor(resource)
|
|
}
|
|
|
|
func (o *lazyObject) ResourceFor(input schema.GroupVersionResource) (schema.GroupVersionResource, error) {
|
|
if err := o.init(); err != nil {
|
|
return schema.GroupVersionResource{}, err
|
|
}
|
|
return o.mapper.ResourceFor(input)
|
|
}
|
|
|
|
func (o *lazyObject) ResourcesFor(input schema.GroupVersionResource) ([]schema.GroupVersionResource, error) {
|
|
if err := o.init(); err != nil {
|
|
return []schema.GroupVersionResource{}, err
|
|
}
|
|
return o.mapper.ResourcesFor(input)
|
|
}
|
|
|
|
func (o *lazyObject) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
|
|
if err := o.init(); err != nil {
|
|
return nil, err
|
|
}
|
|
return o.mapper.RESTMapping(gk, versions...)
|
|
}
|
|
|
|
func (o *lazyObject) RESTMappings(gk schema.GroupKind, versions ...string) ([]*RESTMapping, error) {
|
|
if err := o.init(); err != nil {
|
|
return nil, err
|
|
}
|
|
return o.mapper.RESTMappings(gk, versions...)
|
|
}
|
|
|
|
func (o *lazyObject) ResourceSingularizer(resource string) (singular string, err error) {
|
|
if err := o.init(); err != nil {
|
|
return "", err
|
|
}
|
|
return o.mapper.ResourceSingularizer(resource)
|
|
}
|