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cache.go
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cache.go
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/*
* This file is part of the KubeVirt project
*
* 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.
*
* Copyright 2022 Red Hat, Inc.
*
*/
package metadata
import (
"k8s.io/apimachinery/pkg/types"
"kubevirt.io/kubevirt/pkg/virt-launcher/virtwrap/api"
)
type Cache struct {
UID SafeData[types.UID]
Migration SafeData[api.MigrationMetadata]
GracePeriod SafeData[api.GracePeriodMetadata]
AccessCredential SafeData[api.AccessCredentialMetadata]
MemoryDump SafeData[api.MemoryDumpMetadata]
notificationSignal chan struct{}
}
func NewCache() *Cache {
cache := &Cache{
notificationSignal: make(chan struct{}, 1),
}
cache.UID.dirtyChanel = cache.notificationSignal
cache.Migration.dirtyChanel = cache.notificationSignal
cache.GracePeriod.dirtyChanel = cache.notificationSignal
cache.AccessCredential.dirtyChanel = cache.notificationSignal
cache.MemoryDump.dirtyChanel = cache.notificationSignal
return cache
}
// Listen to a notification signal about the cache content changes.
// Notifications are sent implicitly when the cache data is being changed.
func (c *Cache) Listen() <-chan struct{} {
return c.notificationSignal
}
// ResetNotification clears the notification signal.
func (c *Cache) ResetNotification() {
select {
case <-c.notificationSignal:
default:
}
}