124 lines
2.6 KiB
Go
124 lines
2.6 KiB
Go
/*
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Copyright 2019 The KubeSphere 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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"regexp"
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"strings"
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"time"
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"kubesphere.io/kubesphere/pkg/server/errors"
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)
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var ErrNoSuchKey = errors.New("no such key")
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type simpleObject struct {
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value string
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neverExpire bool
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expiredAt time.Time
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}
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// SimpleCache implements cache.Interface use memory objects, it should be used only for testing
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type simpleCache struct {
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store map[string]simpleObject
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}
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func NewSimpleCache() Interface {
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return &simpleCache{store: make(map[string]simpleObject)}
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}
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func (s *simpleCache) Keys(pattern string) ([]string, error) {
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// There is a little difference between go regexp and redis key pattern
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// In redis, * means any character, while in go . means match everything.
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pattern = strings.Replace(pattern, "*", ".", -1)
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re, err := regexp.Compile(pattern)
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if err != nil {
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return nil, err
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}
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var keys []string
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for k := range s.store {
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if re.MatchString(k) {
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keys = append(keys, k)
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}
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}
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return keys, nil
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}
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func (s *simpleCache) Set(key string, value string, duration time.Duration) error {
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sobject := simpleObject{
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value: value,
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neverExpire: false,
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expiredAt: time.Now().Add(duration),
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}
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if duration == NeverExpire {
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sobject.neverExpire = true
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}
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s.store[key] = sobject
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return nil
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}
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func (s *simpleCache) Del(keys ...string) error {
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for _, key := range keys {
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delete(s.store, key)
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}
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return nil
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}
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func (s *simpleCache) Get(key string) (string, error) {
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if sobject, ok := s.store[key]; ok {
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if sobject.neverExpire || time.Now().Before(sobject.expiredAt) {
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return sobject.value, nil
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}
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}
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return "", ErrNoSuchKey
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}
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func (s *simpleCache) Exists(keys ...string) (bool, error) {
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for _, key := range keys {
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if _, ok := s.store[key]; !ok {
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return false, nil
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}
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}
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return true, nil
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}
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func (s *simpleCache) Expire(key string, duration time.Duration) error {
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value, err := s.Get(key)
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if err != nil {
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return err
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}
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sobject := simpleObject{
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value: value,
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neverExpire: false,
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expiredAt: time.Now().Add(duration),
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}
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if duration == NeverExpire {
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sobject.neverExpire = true
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}
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s.store[key] = sobject
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return nil
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}
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