-
Notifications
You must be signed in to change notification settings - Fork 82
/
index.go
117 lines (103 loc) · 2.96 KB
/
index.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
/*
Copyright 2023 Juicedata Inc
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 dashboard
import (
"container/list"
"context"
"sync"
corev1 "k8s.io/api/core/v1"
storagev1 "k8s.io/api/storage/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/klog"
)
type k8sResource interface {
corev1.Pod | corev1.PersistentVolume | corev1.PersistentVolumeClaim | storagev1.StorageClass
}
type timeOrderedIndexes[T k8sResource] struct {
sync.RWMutex
list *list.List
}
func newTimeIndexes[T k8sResource]() *timeOrderedIndexes[T] {
return &timeOrderedIndexes[T]{
list: list.New(),
}
}
func (i *timeOrderedIndexes[T]) iterate(ctx context.Context, descend bool) <-chan types.NamespacedName {
ch := make(chan types.NamespacedName)
go func() {
i.RLock()
defer i.RUnlock()
if descend {
for e := i.list.Back(); e != nil && ctx.Err() == nil; e = e.Prev() {
ch <- e.Value.(types.NamespacedName)
}
} else {
for e := i.list.Front(); e != nil && ctx.Err() == nil; e = e.Next() {
ch <- e.Value.(types.NamespacedName)
}
}
close(ch)
}()
return ch
}
func (i *timeOrderedIndexes[T]) length() int {
i.RLock()
defer i.RUnlock()
return i.list.Len()
}
func (i *timeOrderedIndexes[T]) addIndex(resource *T, metaGetter func(*T) metav1.ObjectMeta, resourceGetter func(types.NamespacedName) (*T, error)) {
i.Lock()
defer i.Unlock()
meta := metaGetter(resource)
name := types.NamespacedName{
Namespace: meta.Namespace,
Name: meta.Name,
}
for e := i.list.Back(); e != nil; e = e.Prev() {
currentResource, err := resourceGetter(e.Value.(types.NamespacedName))
if err != nil || currentResource == nil {
klog.V(1).Infof("failed to get resource %s: %v", e.Value.(types.NamespacedName), err)
i.list.Remove(e)
continue
}
currentMeta := metaGetter(currentResource)
if meta.UID == currentMeta.UID {
return
}
if meta.CreationTimestamp.After(currentMeta.CreationTimestamp.Time) {
i.list.InsertAfter(name, e)
return
}
}
i.list.PushFront(name)
}
func (i *timeOrderedIndexes[T]) removeIndex(name types.NamespacedName) {
i.Lock()
defer i.Unlock()
for e := i.list.Front(); e != nil; e = e.Next() {
if e.Value.(types.NamespacedName) == name {
i.list.Remove(e)
return
}
}
}
func (i *timeOrderedIndexes[T]) debug() []types.NamespacedName {
i.RLock()
defer i.RUnlock()
var names []types.NamespacedName
for e := i.list.Front(); e != nil; e = e.Next() {
names = append(names, e.Value.(types.NamespacedName))
}
return names
}