service.go

//go:build !ignore_autogenerated
// +build !ignore_autogenerated

/*
Copyright The KCP 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.
*/

// Code generated by kcp code-generator. DO NOT EDIT.

package v1

import (
	kcpcache "github.com/kcp-dev/apimachinery/v2/pkg/cache"
	"github.com/kcp-dev/logicalcluster/v3"

	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/labels"
	corev1listers "k8s.io/client-go/listers/core/v1"
	"k8s.io/client-go/tools/cache"
)

// ServiceClusterLister can list Services across all workspaces, or scope down to a ServiceLister for one workspace.
// All objects returned here must be treated as read-only.
type ServiceClusterLister interface {
	// List lists all Services in the indexer.
	// Objects returned here must be treated as read-only.
	List(selector labels.Selector) (ret []*corev1.Service, err error)
	// Cluster returns a lister that can list and get Services in one workspace.
	Cluster(clusterName logicalcluster.Name) corev1listers.ServiceLister
	ServiceClusterListerExpansion
}

type serviceClusterLister struct {
	indexer cache.Indexer
}

// NewServiceClusterLister returns a new ServiceClusterLister.
// We assume that the indexer:
// - is fed by a cross-workspace LIST+WATCH
// - uses kcpcache.MetaClusterNamespaceKeyFunc as the key function
// - has the kcpcache.ClusterIndex as an index
// - has the kcpcache.ClusterAndNamespaceIndex as an index
func NewServiceClusterLister(indexer cache.Indexer) *serviceClusterLister {
	return &serviceClusterLister{indexer: indexer}
}

// List lists all Services in the indexer across all workspaces.
func (s *serviceClusterLister) List(selector labels.Selector) (ret []*corev1.Service, err error) {
	err = cache.ListAll(s.indexer, selector, func(m interface{}) {
		ret = append(ret, m.(*corev1.Service))
	})
	return ret, err
}

// Cluster scopes the lister to one workspace, allowing users to list and get Services.
func (s *serviceClusterLister) Cluster(clusterName logicalcluster.Name) corev1listers.ServiceLister {
	return &serviceLister{indexer: s.indexer, clusterName: clusterName}
}

// serviceLister implements the corev1listers.ServiceLister interface.
type serviceLister struct {
	indexer     cache.Indexer
	clusterName logicalcluster.Name
}

// List lists all Services in the indexer for a workspace.
func (s *serviceLister) List(selector labels.Selector) (ret []*corev1.Service, err error) {
	err = kcpcache.ListAllByCluster(s.indexer, s.clusterName, selector, func(i interface{}) {
		ret = append(ret, i.(*corev1.Service))
	})
	return ret, err
}

// Services returns an object that can list and get Services in one namespace.
func (s *serviceLister) Services(namespace string) corev1listers.ServiceNamespaceLister {
	return &serviceNamespaceLister{indexer: s.indexer, clusterName: s.clusterName, namespace: namespace}
}

// serviceNamespaceLister implements the corev1listers.ServiceNamespaceLister interface.
type serviceNamespaceLister struct {
	indexer     cache.Indexer
	clusterName logicalcluster.Name
	namespace   string
}

// List lists all Services in the indexer for a given workspace and namespace.
func (s *serviceNamespaceLister) List(selector labels.Selector) (ret []*corev1.Service, err error) {
	err = kcpcache.ListAllByClusterAndNamespace(s.indexer, s.clusterName, s.namespace, selector, func(i interface{}) {
		ret = append(ret, i.(*corev1.Service))
	})
	return ret, err
}

// Get retrieves the Service from the indexer for a given workspace, namespace and name.
func (s *serviceNamespaceLister) Get(name string) (*corev1.Service, error) {
	key := kcpcache.ToClusterAwareKey(s.clusterName.String(), s.namespace, name)
	obj, exists, err := s.indexer.GetByKey(key)
	if err != nil {
		return nil, err
	}
	if !exists {
		return nil, errors.NewNotFound(corev1.Resource("services"), name)
	}
	return obj.(*corev1.Service), nil
}