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container_reference_manager.go 1.79 KB
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Chao Xu 提交于 2016-11-18 12:50 . cmd/kubelet
/*
Copyright 2015 The Kubernetes Authors.
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 container
import (
"sync"
"k8s.io/kubernetes/pkg/api/v1"
)
// RefManager manages the references for the containers.
// The references are used for reporting events such as creation,
// failure, etc. This manager is thread-safe, no locks are necessary
// for the caller.
type RefManager struct {
sync.RWMutex
containerIDToRef map[ContainerID]*v1.ObjectReference
}
// NewRefManager creates and returns a container reference manager
// with empty contents.
func NewRefManager() *RefManager {
return &RefManager{containerIDToRef: make(map[ContainerID]*v1.ObjectReference)}
}
// SetRef stores a reference to a pod's container, associating it with the given container ID.
func (c *RefManager) SetRef(id ContainerID, ref *v1.ObjectReference) {
c.Lock()
defer c.Unlock()
c.containerIDToRef[id] = ref
}
// ClearRef forgets the given container id and its associated container reference.
func (c *RefManager) ClearRef(id ContainerID) {
c.Lock()
defer c.Unlock()
delete(c.containerIDToRef, id)
}
// GetRef returns the container reference of the given ID, or (nil, false) if none is stored.
func (c *RefManager) GetRef(id ContainerID) (ref *v1.ObjectReference, ok bool) {
c.RLock()
defer c.RUnlock()
ref, ok = c.containerIDToRef[id]
return ref, ok
}
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