/*
|
Copyright 2018 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 dynamiclister
|
|
import (
|
"k8s.io/apimachinery/pkg/api/errors"
|
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
|
"k8s.io/apimachinery/pkg/labels"
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
"k8s.io/client-go/tools/cache"
|
)
|
|
var _ Lister = &dynamicLister{}
|
var _ NamespaceLister = &dynamicNamespaceLister{}
|
|
// dynamicLister implements the Lister interface.
|
type dynamicLister struct {
|
indexer cache.Indexer
|
gvr schema.GroupVersionResource
|
}
|
|
// New returns a new Lister.
|
func New(indexer cache.Indexer, gvr schema.GroupVersionResource) Lister {
|
return &dynamicLister{indexer: indexer, gvr: gvr}
|
}
|
|
// List lists all resources in the indexer.
|
func (l *dynamicLister) List(selector labels.Selector) (ret []*unstructured.Unstructured, err error) {
|
err = cache.ListAll(l.indexer, selector, func(m interface{}) {
|
ret = append(ret, m.(*unstructured.Unstructured))
|
})
|
return ret, err
|
}
|
|
// Get retrieves a resource from the indexer with the given name
|
func (l *dynamicLister) Get(name string) (*unstructured.Unstructured, error) {
|
obj, exists, err := l.indexer.GetByKey(name)
|
if err != nil {
|
return nil, err
|
}
|
if !exists {
|
return nil, errors.NewNotFound(l.gvr.GroupResource(), name)
|
}
|
return obj.(*unstructured.Unstructured), nil
|
}
|
|
// Namespace returns an object that can list and get resources from a given namespace.
|
func (l *dynamicLister) Namespace(namespace string) NamespaceLister {
|
return &dynamicNamespaceLister{indexer: l.indexer, namespace: namespace, gvr: l.gvr}
|
}
|
|
// dynamicNamespaceLister implements the NamespaceLister interface.
|
type dynamicNamespaceLister struct {
|
indexer cache.Indexer
|
namespace string
|
gvr schema.GroupVersionResource
|
}
|
|
// List lists all resources in the indexer for a given namespace.
|
func (l *dynamicNamespaceLister) List(selector labels.Selector) (ret []*unstructured.Unstructured, err error) {
|
err = cache.ListAllByNamespace(l.indexer, l.namespace, selector, func(m interface{}) {
|
ret = append(ret, m.(*unstructured.Unstructured))
|
})
|
return ret, err
|
}
|
|
// Get retrieves a resource from the indexer for a given namespace and name.
|
func (l *dynamicNamespaceLister) Get(name string) (*unstructured.Unstructured, error) {
|
obj, exists, err := l.indexer.GetByKey(l.namespace + "/" + name)
|
if err != nil {
|
return nil, err
|
}
|
if !exists {
|
return nil, errors.NewNotFound(l.gvr.GroupResource(), name)
|
}
|
return obj.(*unstructured.Unstructured), nil
|
}
|
