redis.go
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package cache
import (
"encoding/json"
"errors"
"github.com/garyburd/redigo/redis"
)
var (
DefaultKey string = "beecacheRedis"
)
type RedisCache struct {
c redis.Conn
conninfo string
key string
}
func NewRedisCache() *RedisCache {
return &RedisCache{key: DefaultKey}
}
func (rc *RedisCache) Get(key string) interface{} {
if rc.c == nil {
var err error
rc.c, err = rc.connectInit()
if err != nil {
return nil
}
}
v, err := rc.c.Do("HGET", rc.key, key)
if err != nil {
return nil
}
return v
}
func (rc *RedisCache) Put(key string, val interface{}, timeout int64) error {
if rc.c == nil {
var err error
rc.c, err = rc.connectInit()
if err != nil {
return err
}
}
_, err := rc.c.Do("HSET", rc.key, key, val)
return err
}
func (rc *RedisCache) Delete(key string) error {
if rc.c == nil {
var err error
rc.c, err = rc.connectInit()
if err != nil {
return err
}
}
_, err := rc.c.Do("HDEL", rc.key, key)
return err
}
func (rc *RedisCache) IsExist(key string) bool {
if rc.c == nil {
var err error
rc.c, err = rc.connectInit()
if err != nil {
return false
}
}
v, err := redis.Bool(rc.c.Do("HEXISTS", rc.key, key))
if err != nil {
return false
}
return v
}
func (rc *RedisCache) Incr(key string) error {
if rc.c == nil {
var err error
rc.c, err = rc.connectInit()
if err != nil {
return err
}
}
_, err := redis.Bool(rc.c.Do("HINCRBY", rc.key, key, 1))
if err != nil {
return err
}
return nil
}
func (rc *RedisCache) Decr(key string) error {
if rc.c == nil {
var err error
rc.c, err = rc.connectInit()
if err != nil {
return err
}
}
_, err := redis.Bool(rc.c.Do("HINCRBY", rc.key, key, -1))
if err != nil {
return err
}
return nil
}
func (rc *RedisCache) ClearAll() error {
if rc.c == nil {
var err error
rc.c, err = rc.connectInit()
if err != nil {
return err
}
}
_, err := rc.c.Do("DEL", rc.key)
return err
}
func (rc *RedisCache) StartAndGC(config string) error {
var cf map[string]string
json.Unmarshal([]byte(config), &cf)
if _, ok := cf["key"]; !ok {
cf["key"] = DefaultKey
}
if _, ok := cf["conn"]; !ok {
return errors.New("config has no conn key")
}
rc.key = cf["key"]
rc.conninfo = cf["conn"]
var err error
rc.c, err = rc.connectInit()
if err != nil {
return err
}
if rc.c == nil {
return errors.New("dial tcp conn error")
}
return nil
}
func (rc *RedisCache) connectInit() (redis.Conn, error) {
c, err := redis.Dial("tcp", rc.conninfo)
if err != nil {
return nil, err
}
return c, nil
}
func init() {
Register("redis", NewRedisCache())
}