1/*
2Copyright 2014 The Kubernetes Authors.
3
4Licensed under the Apache License, Version 2.0 (the "License");
5you may not use this file except in compliance with the License.
6You may obtain a copy of the License at
7
8    http://www.apache.org/licenses/LICENSE-2.0
9
10Unless required by applicable law or agreed to in writing, software
11distributed under the License is distributed on an "AS IS" BASIS,
12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13See the License for the specific language governing permissions and
14limitations under the License.
15*/
16
17package cache
18
19import (
20	"k8s.io/apimachinery/pkg/util/clock"
21	"k8s.io/apimachinery/pkg/util/sets"
22)
23
24type fakeThreadSafeMap struct {
25	ThreadSafeStore
26	deletedKeys chan<- string
27}
28
29func (c *fakeThreadSafeMap) Delete(key string) {
30	if c.deletedKeys != nil {
31		c.ThreadSafeStore.Delete(key)
32		c.deletedKeys <- key
33	}
34}
35
36// FakeExpirationPolicy keeps the list for keys which never expires.
37type FakeExpirationPolicy struct {
38	NeverExpire     sets.String
39	RetrieveKeyFunc KeyFunc
40}
41
42// IsExpired used to check if object is expired.
43func (p *FakeExpirationPolicy) IsExpired(obj *TimestampedEntry) bool {
44	key, _ := p.RetrieveKeyFunc(obj)
45	return !p.NeverExpire.Has(key)
46}
47
48// NewFakeExpirationStore creates a new instance for the ExpirationCache.
49func NewFakeExpirationStore(keyFunc KeyFunc, deletedKeys chan<- string, expirationPolicy ExpirationPolicy, cacheClock clock.Clock) Store {
50	cacheStorage := NewThreadSafeStore(Indexers{}, Indices{})
51	return &ExpirationCache{
52		cacheStorage:     &fakeThreadSafeMap{cacheStorage, deletedKeys},
53		keyFunc:          keyFunc,
54		clock:            cacheClock,
55		expirationPolicy: expirationPolicy,
56	}
57}
58