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daemonset.go
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daemonset.go
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// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 kubernetes
import (
appsv1 "k8s.io/api/apps/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/labels"
)
// DaemonSetSource is a function that produces a slice of DaemonSets or an error.
type DaemonSetSource func() ([]*appsv1.DaemonSet, error)
// DaemonSetLister is a lister of DaemonSets.
type DaemonSetLister interface {
// List lists all DaemonSets that match the given selector.
List(selector labels.Selector) ([]*appsv1.DaemonSet, error)
// DaemonSets yields a DaemonSetNamespaceLister for the given namespace.
DaemonSets(namespace string) DaemonSetNamespaceLister
}
// DaemonSetNamespaceLister is a lister of deployments for a specific namespace.
type DaemonSetNamespaceLister interface {
// List lists all DaemonSets that match the given selector in the current namespace.
List(selector labels.Selector) ([]*appsv1.DaemonSet, error)
// Get retrieves the DaemonSet with the given name in the current namespace.
Get(name string) (*appsv1.DaemonSet, error)
}
type daemonSetLister struct {
source DaemonSetSource
}
type daemonSetNamespaceLister struct {
source DaemonSetSource
namespace string
}
// NewDaemonSetLister creates a new DaemonSetLister from the given DaemonSetSource.
func NewDaemonSetLister(source DaemonSetSource) DaemonSetLister {
return &daemonSetLister{source: source}
}
func filterDaemonSets(source DaemonSetSource, filter func(*appsv1.DaemonSet) bool) ([]*appsv1.DaemonSet, error) {
daemonSets, err := source()
if err != nil {
return nil, err
}
var out []*appsv1.DaemonSet
for _, daemonSet := range daemonSets {
if filter(daemonSet) {
out = append(out, daemonSet)
}
}
return out, nil
}
func (d *daemonSetLister) List(selector labels.Selector) ([]*appsv1.DaemonSet, error) {
return filterDaemonSets(d.source, func(daemonSet *appsv1.DaemonSet) bool {
return selector.Matches(labels.Set(daemonSet.Labels))
})
}
func (d *daemonSetLister) DaemonSets(namespace string) DaemonSetNamespaceLister {
return &daemonSetNamespaceLister{
source: d.source,
namespace: namespace,
}
}
func (d *daemonSetNamespaceLister) Get(name string) (*appsv1.DaemonSet, error) {
daemonSets, err := filterDaemonSets(d.source, func(daemonSet *appsv1.DaemonSet) bool {
return daemonSet.Namespace == d.namespace && daemonSet.Name == name
})
if err != nil {
return nil, err
}
if len(daemonSets) == 0 {
return nil, apierrors.NewNotFound(appsv1.Resource("DaemonSets"), name)
}
return daemonSets[0], nil
}
func (d *daemonSetNamespaceLister) List(selector labels.Selector) ([]*appsv1.DaemonSet, error) {
return filterDaemonSets(d.source, func(daemonSet *appsv1.DaemonSet) bool {
return daemonSet.Namespace == d.namespace && selector.Matches(labels.Set(daemonSet.Labels))
})
}