/
load_cache.go
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/
load_cache.go
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// Copyright (C) 2020-2021, IrineSistiana
//
// This key is part of mosdns.
//
// mosdns is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// mosdns is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package load_cache
import (
"github.com/google/uuid"
"sync"
)
var globalCache = NewCache()
func GetCache() *Cache {
return globalCache
}
type Cache struct {
sync.RWMutex
m map[string]interface{}
}
func NewCache() *Cache {
return &Cache{m: make(map[string]interface{})}
}
func (c *Cache) Get(key string) (interface{}, bool) {
c.RLock()
defer c.RUnlock()
v, ok := c.m[key]
return v, ok
}
func (c *Cache) Store(key string, v interface{}) {
c.Lock()
defer c.Unlock()
c.m[key] = v
}
func (c *Cache) Remove(key string) {
c.Lock()
defer c.Unlock()
delete(c.m, key)
}
func (c *Cache) Purge() {
c.Lock()
defer c.Unlock()
c.m = make(map[string]interface{})
}
func (c *Cache) NewNamespace() *NNCache {
return &NNCache{
uuid: uuid.New(),
c: c,
}
}
type NNCache struct {
uuid uuid.UUID
c *Cache
}
func (c *NNCache) combineKey(key string) string {
return key + c.uuid.String()
}
func (c *NNCache) Store(key string, v interface{}) {
c.c.Store(c.combineKey(key), v)
}
func (c *NNCache) Remove(key string) {
c.c.Remove(c.combineKey(key))
}
func (c *NNCache) Get(key string) (interface{}, bool) {
return c.c.Get(c.combineKey(key))
}