forked from gogap/cache_storages
/
redis.go
196 lines (171 loc) · 4.1 KB
/
redis.go
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package cache_storages
import (
"encoding/json"
"time"
"github.com/garyburd/redigo/redis"
)
const (
MAX_IDLE = 3
IDLE_TIMEOUT = 180
)
type RedisStorage struct {
pool *redis.Pool
conn string
db int
auth string
}
func NewAuthRedisStorage(conn string, db int, auth string) (storage *RedisStorage, err error) {
storage = newRedisStorage(conn, db)
storage.auth = auth
storage.init()
c := storage.pool.Get()
defer c.Close()
err = c.Err()
return
}
func NewRedisStorage(conn string, db int) (storage *RedisStorage, err error) {
storage = newRedisStorage(conn, db)
storage.init()
c := storage.pool.Get()
defer c.Close()
err = c.Err()
return
}
func newRedisStorage(conn string, db int) (storage *RedisStorage) {
storage = new(RedisStorage)
storage.conn = conn
storage.db = db
return
}
func (p *RedisStorage) StorageType() string {
return "redis"
}
func (p *RedisStorage) init() {
dialFunc := func() (c redis.Conn, err error) {
c, err = redis.Dial("tcp", p.conn)
if err != nil {
return
}
if p.auth != "" {
_, err = c.Do("AUTH", p.auth)
}
_, selecterr := c.Do("SELECT", p.db)
if selecterr != nil {
c.Close()
return nil, selecterr
}
return
}
// initialize a new pool
p.pool = &redis.Pool{
MaxIdle: MAX_IDLE,
IdleTimeout: IDLE_TIMEOUT * time.Second,
Dial: dialFunc,
}
}
// actually do the redis cmds
func (p *RedisStorage) do(cmd string, args ...interface{}) (interface{}, error) {
c := p.pool.Get()
defer c.Close()
return c.Do(cmd, args...)
}
// put cache to redis
func (p *RedisStorage) SetObject(key string, value interface{}, seconds int32) (err error) {
data, err := json.Marshal(value)
if err != nil {
return
}
if seconds > 0 {
_, err = p.do("SETEX", key, seconds, data)
} else {
_, err = p.do("SET", key, data)
}
return
}
// get cache from redis.
func (p *RedisStorage) GetObject(key string, value interface{}) (err error) {
vi, err := p.do("GET", key)
if err != nil || vi == nil {
return
}
data, err := redis.Bytes(vi, err)
if err != nil {
return
}
return json.Unmarshal(data, value)
}
func (p *RedisStorage) GetMultiObject(keyValues map[string]interface{}) (err error) {
for key, value := range keyValues {
if err = p.GetObject(key, value); err != nil {
return
}
}
return
}
func (p *RedisStorage) Get(key string) (value string, err error) {
data, err := p.do("GET", key)
if err != nil || data == nil {
return
}
return redis.String(data, err)
}
func (p *RedisStorage) Set(key, value string, seconds int32) (err error) {
if seconds > 0 {
_, err = p.do("SETEX", key, seconds, value)
} else {
_, err = p.do("SET", key, value)
}
return
}
func (p *RedisStorage) SetNX(key, value string) (result int, err error) {
data, err := p.do("SETNX", key, value)
return redis.Int(data, err)
}
func (p *RedisStorage) GetSet(key, value string) (result string, err error) {
data, err := p.do("GETSET", key, value)
return redis.String(data, err)
}
func (p *RedisStorage) SetInt(key string, value int64, seconds int32) (err error) {
if seconds > 0 {
_, err = p.do("SETEX", key, seconds, value)
} else {
_, err = p.do("SET", key, value)
}
return
}
func (p *RedisStorage) GetInt(key string) (value int64, err error) {
data, err := p.do("GET", key)
if err != nil || data == nil {
return
}
return redis.Int64(data, err)
}
func (p *RedisStorage) GetMulti(keys []string) (values map[string]string, err error) {
values = make(map[string]string)
for _, key := range keys {
value, err := p.Get(key)
if err != nil {
return values, err
}
values[key] = value
}
return
}
func (p *RedisStorage) Touch(key string, seconds int32) (err error) {
_, err = p.do("expire", key, seconds)
return
}
func (p *RedisStorage) Increment(key string, delta uint64) (newValue int64, err error) {
return redis.Int64(p.do("INCRBY", key, delta))
}
func (p *RedisStorage) Decrement(key string, delta uint64) (newValue int64, err error) {
return redis.Int64(p.do("DECRBY", key, delta))
}
func (p *RedisStorage) Delete(key string) (err error) {
_, err = p.do("DEL", key)
return
}
func (p *RedisStorage) DeleteAll() (err error) {
_, err = p.do("FLUSHDB")
return
}