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synced_map_utils.go
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synced_map_utils.go
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// Copyright 2019 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 common
import (
"sync"
policiesv1alpha1 "github.com/ycao56/trusted-container-policy-controller/pkg/apis/policies/v1alpha1"
)
//SyncedPolicyMap a thread safe map
type SyncedPolicyMap struct {
PolicyMap map[string]*policiesv1alpha1.TrustedContainerPolicy
//Mx for making the map thread safe
Mx sync.RWMutex
}
//GetObject used for fetching objects from the synced map
func (spm *SyncedPolicyMap) GetObject(key string) (value *policiesv1alpha1.TrustedContainerPolicy, found bool) {
spm.Mx.Lock()
defer spm.Mx.Unlock()
//check if the map is initialized, if not initilize it
if spm.PolicyMap == nil {
return nil, false
}
if val, ok := spm.PolicyMap[key]; ok {
return val, true
}
return nil, false
}
// AddObject safely add to map
func (spm *SyncedPolicyMap) AddObject(key string, plc *policiesv1alpha1.TrustedContainerPolicy) {
spm.Mx.Lock()
defer spm.Mx.Unlock()
//check if the map is initialized, if not initilize it
if spm.PolicyMap == nil {
spm.PolicyMap = make(map[string]*policiesv1alpha1.TrustedContainerPolicy)
}
spm.PolicyMap[key] = plc
}
// RemoveObject safely remove from map
func (spm *SyncedPolicyMap) RemoveObject(key string) {
spm.Mx.Lock()
defer spm.Mx.Unlock()
//check if the map is initialized, if not return
if spm.PolicyMap == nil {
return
}
delete(spm.PolicyMap, key)
}