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- // 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/log"
- "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
- }
- const testKey = "__gitea_cache_test"
- const testVal = "test-value"
- if err = conn.Put(testKey, testVal, 10); err != nil {
- return err
- }
- val := conn.Get(testKey)
- if valStr, ok := val.(string); !ok || valStr != testVal {
- // If the cache is full, the Get may not read the expected value stored by Put.
- // Since we have checked that Put can success, so we just show a warning here, do not return an error to panic.
- log.Warn("cache (adapter:%s, config:%s) doesn't seem to work correctly, set test value '%v' but get '%v'",
- setting.CacheService.Cache.Adapter, setting.CacheService.Cache.Conn,
- testVal, val,
- )
- }
- }
-
- 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()
- }
- if !conn.IsExist(key) {
- var (
- value string
- err error
- )
- if value, err = getFunc(); err != nil {
- return value, err
- }
- err = conn.Put(key, value, setting.CacheService.TTLSeconds())
- if err != nil {
- return "", err
- }
- }
- value := conn.Get(key)
- if v, ok := value.(string); ok {
- return v, nil
- }
- if v, ok := value.(fmt.Stringer); ok {
- return v.String(), nil
- }
- return fmt.Sprintf("%s", conn.Get(key)), 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()
- }
- if !conn.IsExist(key) {
- var (
- value int
- err error
- )
- if value, err = getFunc(); err != nil {
- return value, err
- }
- err = conn.Put(key, value, setting.CacheService.TTLSeconds())
- if err != nil {
- return 0, err
- }
- }
- switch value := conn.Get(key).(type) {
- case int:
- return value, nil
- case string:
- v, err := strconv.Atoi(value)
- if err != nil {
- return 0, err
- }
- return v, nil
- default:
- return 0, fmt.Errorf("Unsupported cached value type: %v", value)
- }
- }
-
- // 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()
- }
- if !conn.IsExist(key) {
- var (
- value int64
- err error
- )
- if value, err = getFunc(); err != nil {
- return value, err
- }
- err = conn.Put(key, value, setting.CacheService.TTLSeconds())
- if err != nil {
- return 0, err
- }
- }
- switch value := conn.Get(key).(type) {
- case int64:
- return value, nil
- case string:
- v, err := strconv.ParseInt(value, 10, 64)
- if err != nil {
- return 0, err
- }
- return v, nil
- default:
- return 0, fmt.Errorf("Unsupported cached value type: %v", value)
- }
- }
-
- // Remove key from cache
- func Remove(key string) {
- if conn == nil {
- return
- }
- _ = conn.Delete(key)
- }
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