90 lines
1.9 KiB
Go
90 lines
1.9 KiB
Go
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package cache
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import (
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"sync"
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"time"
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)
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type SyncCache struct {
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cache DefaultCache
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sync.RWMutex
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}
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func (c *SyncCache) Set(key string, value bool, extra ...interface{}) error {
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ttl := time.Duration(-1)
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if len(extra) > 0 {
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ttl = extra[0].(time.Duration)
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}
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c.Lock()
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defer c.Unlock()
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c.cache[key] = cacheItem{
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value: value,
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expiresAt: time.Now().Add(ttl),
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ttl: ttl,
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}
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return nil
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}
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func (c *SyncCache) Get(key string) (bool, error) {
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c.RLock()
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res, ok := c.cache[key]
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c.RUnlock()
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if !ok {
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return false, ErrNoSuchKey
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} else {
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if res.ttl > 0 && time.Now().After(res.expiresAt) {
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c.Lock()
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defer c.Unlock()
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delete(c.cache, key)
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return false, ErrNoSuchKey
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}
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return res.value, nil
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}
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}
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func (c *SyncCache) Delete(key string) error {
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c.RLock()
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_, ok := c.cache[key]
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c.RUnlock()
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if !ok {
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return ErrNoSuchKey
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} else {
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c.Lock()
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defer c.Unlock()
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delete(c.cache, key)
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return nil
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}
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}
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func (c *SyncCache) Clear() error {
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c.Lock()
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c.cache = make(DefaultCache)
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c.Unlock()
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return nil
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}
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func NewSyncCache() (Cache, error) {
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cache := SyncCache{
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make(DefaultCache),
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sync.RWMutex{},
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}
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return &cache, nil
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}
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