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70 lines
1.7 KiB
70 lines
1.7 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cache
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import (
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"sync"
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)
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// Cache interface defines the methods for a cache
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type Cache[V any] interface {
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// Set adds an item to the cache
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Set(key string, value V)
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// Get retrieves an item from the cache
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// The boolean return value indicates whether the key was found
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Get(key string) (V, bool)
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}
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// NoOpCache implements Cache interface with no-op operations
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type NoOpCache[V any] struct{}
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func NewNoOpCache[V any]() *NoOpCache[V] {
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return &NoOpCache[V]{}
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}
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func (c *NoOpCache[V]) Set(_ string, _ V) {}
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func (c *NoOpCache[V]) Get(_ string) (V, bool) {
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var zero V
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return zero, false
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}
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// ConcurrentMapCache implements Cache interface using a concurrent map
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type ConcurrentMapCache[V any] struct {
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items map[string]V
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mu sync.RWMutex
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}
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func NewConcurrentMapCache[V any]() *ConcurrentMapCache[V] {
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return &ConcurrentMapCache[V]{
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items: make(map[string]V),
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}
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}
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func (c *ConcurrentMapCache[V]) Set(key string, value V) {
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c.mu.Lock()
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defer c.mu.Unlock()
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c.items[key] = value
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}
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func (c *ConcurrentMapCache[V]) Get(key string) (V, bool) {
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c.mu.RLock()
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defer c.mu.RUnlock()
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value, exists := c.items[key]
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return value, exists
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}
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