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// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
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
}
// Get returns the key value from cache with callback when no key exists in cache
func Get[V interface{}](key string, getFunc func() (V, error)) (V, error) {
if conn == nil || setting.CacheService.TTL == 0 {
return getFunc()
}
cached := conn.Get(key)
if value, ok := cached.(V); ok {
return value, nil
}
value, err := getFunc()
if err != nil {
return value, err
}
return value, conn.Put(key, value, setting.CacheService.TTLSeconds())
}
// Set updates and returns the key value in the cache with callback. The old value is only removed if the updateFunc() is successful
func Set[V interface{}](key string, valueFunc func() (V, error)) (V, error) {
if conn == nil || setting.CacheService.TTL == 0 {
return valueFunc()
}
value, err := valueFunc()
if err != nil {
return value, err
}
return value, conn.Put(key, value, setting.CacheService.TTLSeconds())
}
// 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)
}
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