k8s.io/apiserver@v0.31.1/pkg/quota/v1/generic/registry.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package generic
    18  
    19  import (
    20  	"sync"
    21  
    22  	"k8s.io/apimachinery/pkg/runtime/schema"
    23  	quota "k8s.io/apiserver/pkg/quota/v1"
    24  )
    25  
    26  // implements a basic registry
    27  type simpleRegistry struct {
    28  	lock sync.RWMutex
    29  	// evaluators tracked by the registry
    30  	evaluators map[schema.GroupResource]quota.Evaluator
    31  }
    32  
    33  // NewRegistry creates a simple registry with initial list of evaluators
    34  func NewRegistry(evaluators []quota.Evaluator) quota.Registry {
    35  	return &simpleRegistry{
    36  		evaluators: evaluatorsByGroupResource(evaluators),
    37  	}
    38  }
    39  
    40  func (r *simpleRegistry) Add(e quota.Evaluator) {
    41  	r.lock.Lock()
    42  	defer r.lock.Unlock()
    43  	r.evaluators[e.GroupResource()] = e
    44  }
    45  
    46  func (r *simpleRegistry) Remove(e quota.Evaluator) {
    47  	r.lock.Lock()
    48  	defer r.lock.Unlock()
    49  	delete(r.evaluators, e.GroupResource())
    50  }
    51  
    52  func (r *simpleRegistry) Get(gr schema.GroupResource) quota.Evaluator {
    53  	r.lock.RLock()
    54  	defer r.lock.RUnlock()
    55  	return r.evaluators[gr]
    56  }
    57  
    58  func (r *simpleRegistry) List() []quota.Evaluator {
    59  	r.lock.RLock()
    60  	defer r.lock.RUnlock()
    61  
    62  	return evaluatorsList(r.evaluators)
    63  }
    64  
    65  // evaluatorsByGroupResource converts a list of evaluators to a map by group resource.
    66  func evaluatorsByGroupResource(items []quota.Evaluator) map[schema.GroupResource]quota.Evaluator {
    67  	result := map[schema.GroupResource]quota.Evaluator{}
    68  	for _, item := range items {
    69  		result[item.GroupResource()] = item
    70  	}
    71  	return result
    72  }
    73  
    74  // evaluatorsList converts a map of evaluators to list
    75  func evaluatorsList(input map[schema.GroupResource]quota.Evaluator) []quota.Evaluator {
    76  	var result []quota.Evaluator
    77  	for _, item := range input {
    78  		result = append(result, item)
    79  	}
    80  	return result
    81  }