141 lines
3.1 KiB
Go
141 lines
3.1 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package cache
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import (
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"fmt"
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"time"
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"code.gitea.io/gitea/modules/nosql"
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"gitea.com/go-chi/cache"
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"github.com/go-redis/redis/v7"
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"github.com/unknwon/com"
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)
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// RedisCacher represents a redis cache adapter implementation.
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type RedisCacher struct {
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c redis.UniversalClient
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prefix string
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hsetName string
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occupyMode bool
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}
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// Put puts value into cache with key and expire time.
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// If expired is 0, it lives forever.
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func (c *RedisCacher) Put(key string, val interface{}, expire int64) error {
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key = c.prefix + key
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if expire == 0 {
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if err := c.c.Set(key, com.ToStr(val), 0).Err(); err != nil {
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return err
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}
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} else {
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dur, err := time.ParseDuration(com.ToStr(expire) + "s")
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if err != nil {
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return err
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}
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if err = c.c.Set(key, com.ToStr(val), dur).Err(); err != nil {
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return err
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}
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}
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if c.occupyMode {
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return nil
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}
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return c.c.HSet(c.hsetName, key, "0").Err()
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}
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// Get gets cached value by given key.
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func (c *RedisCacher) Get(key string) interface{} {
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val, err := c.c.Get(c.prefix + key).Result()
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if err != nil {
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return nil
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}
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return val
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}
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// Delete deletes cached value by given key.
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func (c *RedisCacher) Delete(key string) error {
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key = c.prefix + key
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if err := c.c.Del(key).Err(); err != nil {
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return err
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}
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if c.occupyMode {
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return nil
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}
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return c.c.HDel(c.hsetName, key).Err()
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}
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// Incr increases cached int-type value by given key as a counter.
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func (c *RedisCacher) Incr(key string) error {
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if !c.IsExist(key) {
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return fmt.Errorf("key '%s' not exist", key)
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}
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return c.c.Incr(c.prefix + key).Err()
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}
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// Decr decreases cached int-type value by given key as a counter.
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func (c *RedisCacher) Decr(key string) error {
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if !c.IsExist(key) {
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return fmt.Errorf("key '%s' not exist", key)
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}
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return c.c.Decr(c.prefix + key).Err()
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}
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// IsExist returns true if cached value exists.
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func (c *RedisCacher) IsExist(key string) bool {
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if c.c.Exists(c.prefix+key).Val() == 1 {
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return true
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}
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if !c.occupyMode {
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c.c.HDel(c.hsetName, c.prefix+key)
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}
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return false
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}
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// Flush deletes all cached data.
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func (c *RedisCacher) Flush() error {
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if c.occupyMode {
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return c.c.FlushDB().Err()
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}
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keys, err := c.c.HKeys(c.hsetName).Result()
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if err != nil {
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return err
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}
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if err = c.c.Del(keys...).Err(); err != nil {
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return err
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}
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return c.c.Del(c.hsetName).Err()
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}
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// StartAndGC starts GC routine based on config string settings.
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// AdapterConfig: network=tcp,addr=:6379,password=macaron,db=0,pool_size=100,idle_timeout=180,hset_name=MacaronCache,prefix=cache:
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func (c *RedisCacher) StartAndGC(opts cache.Options) error {
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c.hsetName = "MacaronCache"
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c.occupyMode = opts.OccupyMode
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uri := nosql.ToRedisURI(opts.AdapterConfig)
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c.c = nosql.GetManager().GetRedisClient(uri.String())
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for k, v := range uri.Query() {
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switch k {
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case "hset_name":
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c.hsetName = v[0]
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case "prefix":
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c.prefix = v[0]
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}
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}
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return c.c.Ping().Err()
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}
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func init() {
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cache.Register("redis", &RedisCacher{})
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}
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