kubernetes lister 源码

2022-09-18
浏览 (145)

kubernetes lister 代码

文件路径：/staging/src/k8s.io/client-go/dynamic/dynamiclister/lister.go

/*
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
}

相关信息

kubernetes 源码目录

相关文章

kubernetes interface 源码

kubernetes lister_test 源码

kubernetes shim 源码

0 赞

所属分类： 后端技术
本文标签： golang docker
版权声明： 原创文章如转载，请注明本文链接: https://www.seaxiang.com/blog/dc66b9a0140146bf8cc505e5f4095ad0

热门推荐

1、直接访问google.com
2、 - 优质文章
3、 gate.io
4、 harmony 鸿蒙hdc使用指导
5、 harmony 鸿蒙初识ArkTS语言
6、 flink kafka connector scan.startup.mode 的几个选项
7、 openharmony
8、 golang
9、 harmony 鸿蒙ArkUI组件（ArkTS）开发常见问题
10、 Vue中input框自动聚焦

Loading...