mirror of https://github.com/kubevela/kubevela.git
103 lines
2.6 KiB
Go
103 lines
2.6 KiB
Go
/*
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Copyright 2021 The KubeVela 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 utils
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import (
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"context"
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"sync"
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"time"
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)
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// memoryCache memory cache, support time expired
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type memoryCache struct {
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data interface{}
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cacheDuration time.Duration
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startTime time.Time
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}
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// NewMemoryCache new memory cache instance
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func newMemoryCache(data interface{}, cacheDuration time.Duration) *memoryCache {
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mc := &memoryCache{data: data, cacheDuration: cacheDuration, startTime: time.Now()}
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return mc
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}
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// IsExpired whether the cache data expires
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func (m *memoryCache) IsExpired() bool {
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if m.cacheDuration <= 0 {
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return false
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}
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return time.Now().After(m.startTime.Add(m.cacheDuration))
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}
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// GetData get cache data
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func (m *memoryCache) GetData() interface{} {
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return m.data
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}
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// MemoryCacheStore a sample memory cache instance, if data set cache duration, will auto clear after timeout.
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// But, Expired cleanup is not necessarily accurate, it has a 3-second window.
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type MemoryCacheStore struct {
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store sync.Map
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}
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// NewMemoryCacheStore memory cache store
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func NewMemoryCacheStore(ctx context.Context) *MemoryCacheStore {
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mcs := &MemoryCacheStore{
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store: sync.Map{},
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}
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go mcs.run(ctx)
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return mcs
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}
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func (m *MemoryCacheStore) run(ctx context.Context) {
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ticker := time.NewTicker(time.Second * 3)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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return
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case <-ticker.C:
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m.store.Range(func(key, value interface{}) bool {
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if value.(*memoryCache).IsExpired() {
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m.store.Delete(key)
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}
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return true
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})
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}
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}
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}
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// Put cache data, if cacheDuration>0, store will clear data after timeout.
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func (m *MemoryCacheStore) Put(key, value interface{}, cacheDuration time.Duration) {
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mc := newMemoryCache(value, cacheDuration)
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m.store.Store(key, mc)
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}
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// Delete cache data from store
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func (m *MemoryCacheStore) Delete(key interface{}) {
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m.store.Delete(key)
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}
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// Get cache data from store, if not exist or timeout, will return nil
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func (m *MemoryCacheStore) Get(key interface{}) (value interface{}) {
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mc, ok := m.store.Load(key)
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if ok && !mc.(*memoryCache).IsExpired() {
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return mc.(*memoryCache).GetData()
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}
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return nil
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}
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