/
cache.go
51 lines (40 loc) · 1.06 KB
/
cache.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
package controller
import (
"context"
"sync"
"time"
corev1 "k8s.io/api/core/v1"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
type ConfigMapCache struct {
mu *sync.RWMutex
configMap *corev1.ConfigMap
client *kubernetes.Clientset
}
// TODO ideally should invalidate cache when config map is updated instead of every 5 seconds, well something is better than nothing
func NewConfigMapCache(client *kubernetes.Clientset) *ConfigMapCache {
cache := &ConfigMapCache{mu: &sync.RWMutex{}, client: client}
go func() {
for {
<-time.After(5 * time.Second)
cache.mu.Lock()
cache.configMap = nil
cache.mu.Unlock()
}
}()
return cache
}
func (c *ConfigMapCache) Get() (*corev1.ConfigMap, error) {
c.mu.Lock()
defer c.mu.Unlock()
if c.configMap != nil {
return c.configMap, nil
}
configMap, err := c.client.CoreV1().ConfigMaps(SIGRUN_CONTROLLER_NAMESPACE).Get(context.Background(), SIGRUN_CONTROLLER_CONFIG, v1.GetOptions{})
if err != nil {
return nil, err
}
c.configMap = configMap
return configMap, nil
}