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87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cache
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import (
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"time"
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"k8s.io/kubernetes/pkg/api"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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"k8s.io/kubernetes/pkg/fields"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/watch"
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)
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// ListFunc knows how to list resources
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type ListFunc func(options api.ListOptions) (runtime.Object, error)
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// WatchFunc knows how to watch resources
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type WatchFunc func(options api.ListOptions) (watch.Interface, error)
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// ListWatch knows how to list and watch a set of apiserver resources. It satisfies the ListerWatcher interface.
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// It is a convenience function for users of NewReflector, etc.
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// ListFunc and WatchFunc must not be nil
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type ListWatch struct {
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ListFunc ListFunc
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WatchFunc WatchFunc
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}
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// Getter interface knows how to access Get method from RESTClient.
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type Getter interface {
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Get() *client.Request
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}
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// NewListWatchFromClient creates a new ListWatch from the specified client, resource, namespace and field selector.
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func NewListWatchFromClient(c Getter, resource string, namespace string, fieldSelector fields.Selector) *ListWatch {
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listFunc := func(options api.ListOptions) (runtime.Object, error) {
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return c.Get().
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Namespace(namespace).
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Resource(resource).
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VersionedParams(&options, api.ParameterCodec).
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FieldsSelectorParam(fieldSelector).
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Do().
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Get()
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}
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watchFunc := func(options api.ListOptions) (watch.Interface, error) {
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return c.Get().
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Prefix("watch").
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Namespace(namespace).
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Resource(resource).
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VersionedParams(&options, api.ParameterCodec).
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FieldsSelectorParam(fieldSelector).
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Watch()
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}
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return &ListWatch{ListFunc: listFunc, WatchFunc: watchFunc}
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}
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func timeoutFromListOptions(options api.ListOptions) time.Duration {
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if options.TimeoutSeconds != nil {
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return time.Duration(*options.TimeoutSeconds) * time.Second
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}
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return 0
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}
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// List a set of apiserver resources
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func (lw *ListWatch) List(options api.ListOptions) (runtime.Object, error) {
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return lw.ListFunc(options)
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}
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// Watch a set of apiserver resources
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func (lw *ListWatch) Watch(options api.ListOptions) (watch.Interface, error) {
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return lw.WatchFunc(options)
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}
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