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- // Copyright 2020 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"
- "time"
-
- "code.gitea.io/gitea/modules/graceful"
- "code.gitea.io/gitea/modules/nosql"
-
- "gitea.com/go-chi/cache"
- "github.com/go-redis/redis/v8"
- "github.com/unknwon/com"
- )
-
- // RedisCacher represents a redis cache adapter implementation.
- type RedisCacher struct {
- c redis.UniversalClient
- prefix string
- hsetName string
- occupyMode bool
- }
-
- // Put puts value into cache with key and expire time.
- // If expired is 0, it lives forever.
- func (c *RedisCacher) Put(key string, val interface{}, expire int64) error {
- key = c.prefix + key
- if expire == 0 {
- if err := c.c.Set(graceful.GetManager().HammerContext(), key, com.ToStr(val), 0).Err(); err != nil {
- return err
- }
- } else {
- dur, err := time.ParseDuration(com.ToStr(expire) + "s")
- if err != nil {
- return err
- }
- if err = c.c.Set(graceful.GetManager().HammerContext(), key, com.ToStr(val), dur).Err(); err != nil {
- return err
- }
- }
-
- if c.occupyMode {
- return nil
- }
- return c.c.HSet(graceful.GetManager().HammerContext(), c.hsetName, key, "0").Err()
- }
-
- // Get gets cached value by given key.
- func (c *RedisCacher) Get(key string) interface{} {
- val, err := c.c.Get(graceful.GetManager().HammerContext(), c.prefix+key).Result()
- if err != nil {
- return nil
- }
- return val
- }
-
- // Delete deletes cached value by given key.
- func (c *RedisCacher) Delete(key string) error {
- key = c.prefix + key
- if err := c.c.Del(graceful.GetManager().HammerContext(), key).Err(); err != nil {
- return err
- }
-
- if c.occupyMode {
- return nil
- }
- return c.c.HDel(graceful.GetManager().HammerContext(), c.hsetName, key).Err()
- }
-
- // Incr increases cached int-type value by given key as a counter.
- func (c *RedisCacher) Incr(key string) error {
- if !c.IsExist(key) {
- return fmt.Errorf("key '%s' not exist", key)
- }
- return c.c.Incr(graceful.GetManager().HammerContext(), c.prefix+key).Err()
- }
-
- // Decr decreases cached int-type value by given key as a counter.
- func (c *RedisCacher) Decr(key string) error {
- if !c.IsExist(key) {
- return fmt.Errorf("key '%s' not exist", key)
- }
- return c.c.Decr(graceful.GetManager().HammerContext(), c.prefix+key).Err()
- }
-
- // IsExist returns true if cached value exists.
- func (c *RedisCacher) IsExist(key string) bool {
- if c.c.Exists(graceful.GetManager().HammerContext(), c.prefix+key).Val() == 1 {
- return true
- }
-
- if !c.occupyMode {
- c.c.HDel(graceful.GetManager().HammerContext(), c.hsetName, c.prefix+key)
- }
- return false
- }
-
- // Flush deletes all cached data.
- func (c *RedisCacher) Flush() error {
- if c.occupyMode {
- return c.c.FlushDB(graceful.GetManager().HammerContext()).Err()
- }
-
- keys, err := c.c.HKeys(graceful.GetManager().HammerContext(), c.hsetName).Result()
- if err != nil {
- return err
- }
- if err = c.c.Del(graceful.GetManager().HammerContext(), keys...).Err(); err != nil {
- return err
- }
- return c.c.Del(graceful.GetManager().HammerContext(), c.hsetName).Err()
- }
-
- // StartAndGC starts GC routine based on config string settings.
- // AdapterConfig: network=tcp,addr=:6379,password=macaron,db=0,pool_size=100,idle_timeout=180,hset_name=MacaronCache,prefix=cache:
- func (c *RedisCacher) StartAndGC(opts cache.Options) error {
- c.hsetName = "MacaronCache"
- c.occupyMode = opts.OccupyMode
-
- uri := nosql.ToRedisURI(opts.AdapterConfig)
-
- c.c = nosql.GetManager().GetRedisClient(uri.String())
-
- for k, v := range uri.Query() {
- switch k {
- case "hset_name":
- c.hsetName = v[0]
- case "prefix":
- c.prefix = v[0]
- }
- }
-
- return c.c.Ping(graceful.GetManager().HammerContext()).Err()
- }
-
- func init() {
- cache.Register("redis", &RedisCacher{})
- }
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