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121 lines
2.6 KiB
Go
121 lines
2.6 KiB
Go
// Copyright 2024 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package cache
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import (
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"errors"
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"strings"
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"code.gitea.io/gitea/modules/json"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/util"
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chi_cache "gitea.com/go-chi/cache" //nolint:depguard
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)
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type GetJSONError struct {
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err error
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cachedError string // Golang error can't be stored in cache, only the string message could be stored
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}
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func (e *GetJSONError) ToError() error {
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if e.err != nil {
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return e.err
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}
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return errors.New("cached error: " + e.cachedError)
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}
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type StringCache interface {
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Ping() error
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Get(key string) (string, bool)
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Put(key, value string, ttl int64) error
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Delete(key string) error
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IsExist(key string) bool
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PutJSON(key string, v any, ttl int64) error
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GetJSON(key string, ptr any) (exist bool, err *GetJSONError)
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ChiCache() chi_cache.Cache
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}
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type stringCache struct {
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chiCache chi_cache.Cache
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}
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func NewStringCache(cacheConfig setting.Cache) (StringCache, error) {
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adapter := util.IfZero(cacheConfig.Adapter, "memory")
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interval := util.IfZero(cacheConfig.Interval, 60)
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cc, err := chi_cache.NewCacher(chi_cache.Options{
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Adapter: adapter,
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AdapterConfig: cacheConfig.Conn,
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Interval: interval,
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})
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if err != nil {
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return nil, err
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}
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return &stringCache{chiCache: cc}, nil
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}
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func (sc *stringCache) Ping() error {
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return sc.chiCache.Ping()
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}
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func (sc *stringCache) Get(key string) (string, bool) {
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v := sc.chiCache.Get(key)
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if v == nil {
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return "", false
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}
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s, ok := v.(string)
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return s, ok
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}
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func (sc *stringCache) Put(key, value string, ttl int64) error {
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return sc.chiCache.Put(key, value, ttl)
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}
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func (sc *stringCache) Delete(key string) error {
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return sc.chiCache.Delete(key)
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}
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func (sc *stringCache) IsExist(key string) bool {
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return sc.chiCache.IsExist(key)
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}
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const cachedErrorPrefix = "<CACHED-ERROR>:"
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func (sc *stringCache) PutJSON(key string, v any, ttl int64) error {
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var s string
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switch v := v.(type) {
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case error:
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s = cachedErrorPrefix + v.Error()
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default:
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b, err := json.Marshal(v)
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if err != nil {
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return err
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}
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s = util.UnsafeBytesToString(b)
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}
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return sc.chiCache.Put(key, s, ttl)
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}
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func (sc *stringCache) GetJSON(key string, ptr any) (exist bool, getErr *GetJSONError) {
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s, ok := sc.Get(key)
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if !ok || s == "" {
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return false, nil
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}
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s, isCachedError := strings.CutPrefix(s, cachedErrorPrefix)
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if isCachedError {
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return true, &GetJSONError{cachedError: s}
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}
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if err := json.Unmarshal(util.UnsafeStringToBytes(s), ptr); err != nil {
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return false, &GetJSONError{err: err}
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}
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return true, nil
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}
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func (sc *stringCache) ChiCache() chi_cache.Cache {
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return sc.chiCache
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}
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