forgejo/modules/cache/cache.go
Lunny Xiao 0697075547
Fix get system setting bug when enabled redis cache (#22298)
backport #22295, fix #22281

Co-authored-by: Lauris BH <lauris@nix.lv>
2023-01-01 23:24:01 +08:00

153 lines
3.1 KiB
Go

// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package cache
import (
"fmt"
"strconv"
"code.gitea.io/gitea/modules/setting"
mc "gitea.com/go-chi/cache"
_ "gitea.com/go-chi/cache/memcache" // memcache plugin for cache
)
var conn mc.Cache
func newCache(cacheConfig setting.Cache) (mc.Cache, error) {
return mc.NewCacher(mc.Options{
Adapter: cacheConfig.Adapter,
AdapterConfig: cacheConfig.Conn,
Interval: cacheConfig.Interval,
})
}
// NewContext start cache service
func NewContext() error {
var err error
if conn == nil && setting.CacheService.Enabled {
if conn, err = newCache(setting.CacheService.Cache); err != nil {
return err
}
if err = conn.Ping(); err != nil {
return err
}
}
return err
}
// GetCache returns the currently configured cache
func GetCache() mc.Cache {
return conn
}
// GetString returns the key value from cache with callback when no key exists in cache
func GetString(key string, getFunc func() (string, error)) (string, error) {
if conn == nil || setting.CacheService.TTL == 0 {
return getFunc()
}
cached := conn.Get(key)
if cached == nil {
value, err := getFunc()
if err != nil {
return value, err
}
return value, conn.Put(key, value, setting.CacheService.TTLSeconds())
}
if value, ok := cached.(string); ok {
return value, nil
}
if stringer, ok := cached.(fmt.Stringer); ok {
return stringer.String(), nil
}
return fmt.Sprintf("%s", cached), nil
}
// GetInt returns key value from cache with callback when no key exists in cache
func GetInt(key string, getFunc func() (int, error)) (int, error) {
if conn == nil || setting.CacheService.TTL == 0 {
return getFunc()
}
cached := conn.Get(key)
if cached == nil {
value, err := getFunc()
if err != nil {
return value, err
}
return value, conn.Put(key, value, setting.CacheService.TTLSeconds())
}
switch v := cached.(type) {
case int:
return v, nil
case string:
value, err := strconv.Atoi(v)
if err != nil {
return 0, err
}
return value, nil
default:
value, err := getFunc()
if err != nil {
return value, err
}
return value, conn.Put(key, value, setting.CacheService.TTLSeconds())
}
}
// GetInt64 returns key value from cache with callback when no key exists in cache
func GetInt64(key string, getFunc func() (int64, error)) (int64, error) {
if conn == nil || setting.CacheService.TTL == 0 {
return getFunc()
}
cached := conn.Get(key)
if cached == nil {
value, err := getFunc()
if err != nil {
return value, err
}
return value, conn.Put(key, value, setting.CacheService.TTLSeconds())
}
switch v := conn.Get(key).(type) {
case int64:
return v, nil
case string:
value, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return 0, err
}
return value, nil
default:
value, err := getFunc()
if err != nil {
return value, err
}
return value, conn.Put(key, value, setting.CacheService.TTLSeconds())
}
}
// Remove key from cache
func Remove(key string) {
if conn == nil {
return
}
_ = conn.Delete(key)
}