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redis.go
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redis.go
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package heldiamgo
import (
"time"
"github.com/go-redsync/redsync"
"github.com/gomodule/redigo/redis"
"github.com/bigdot123456/golib4db/db"
"github.com/bigdot123456/golib4db/logs"
)
//RedisUtil redis操作工具
type RedisUtil struct {
pool *redis.Pool //redis连接池
prefix string //前缀
debug bool
redsync *redsync.Redsync //分布式锁对象
log logs.Logger
}
//初始化redis,host=地址,password密码,db数据名称,maxidle最大有效连接数,active 最大可用连接数
func InitializeRedis(host, password, db string, maxidle, maxactive int) *RedisUtil {
if maxidle < 10 {
maxidle = 10
}
if maxactive < 10 {
maxactive = 10
}
pool := &redis.Pool{ // 建立连接池
MaxIdle: maxidle,
MaxActive: maxactive,
IdleTimeout: 180 * time.Second,
Dial: func() (redis.Conn, error) {
c, err := redis.Dial("tcp", host)
if err != nil {
return nil, err
}
if password != "" {
//认证
c.Do("AUTH", password)
}
// 选择db
c.Do("SELECT", db)
return c, nil
},
}
return &RedisUtil{
pool: pool,
redsync: redsync.New([]redsync.Pool{pool}),
debug: false,
}
}
//设置是否调试,调试状态不进入真正缓存
func (r *RedisUtil) Debug(b bool) {
r.debug = b
}
//设置缓存前缀
func (r *RedisUtil) SetPrefix(prefix string) {
r.prefix = prefix
}
//缓存前缀
func (r *RedisUtil) Prefix() string {
return r.prefix
}
//设置日志
func (r *RedisUtil) SetLogger(lg logs.Logger) {
r.log = lg
}
//SET 设置值
func (r *RedisUtil) SET(key, value string) bool {
if r.debug {
return true
}
rclient := r.pool.Get()
_, err := rclient.Do("SET", r.prefix+key, value)
rclient.Close()
if err != nil && r.log != nil {
r.log.Error("[SET]失败:%s", err.Error())
}
return err == nil
}
//SETEX 设置值和过期时间
func (r *RedisUtil) SETEX(key, value string, expireTime int64) bool {
if r.debug {
return true
}
rclient := r.pool.Get()
_, err := rclient.Do("SETEX", r.prefix+key, expireTime, value)
rclient.Close()
if err != nil && r.log != nil {
r.log.Error("[SETEX]失败:%s", err.Error())
}
return err == nil
}
//EXPIRE 设置过期时间
//@return -1=错误,0=key不存在, 1=成功
func (r *RedisUtil) EXPIRE(key string, expireTime int64) int {
if r.debug {
return -1
}
rclient := r.pool.Get()
ret, err := rclient.Do("EXPIRE", r.prefix+key, expireTime)
rclient.Close()
if err != nil {
if r.log != nil {
r.log.Error("[EXPIRE]失败:%s", err.Error())
}
return -1
}
return db.IntDefault(ret, -1)
}
//DEL 删除
//@return 返回删除的个数,-1代表错误
func (r *RedisUtil) DEL(key ...interface{}) int {
if r.debug {
return -1
}
keys := make([]interface{}, len(key))
for i, v := range key {
switch v.(type) {
case string:
keys[i] = r.prefix + v.(string)
default:
keys[i] = v
}
}
rclient := r.pool.Get()
ret, err := rclient.Do("DEL", keys...)
rclient.Close()
if err != nil {
if r.log != nil {
r.log.Error("[DEL]失败:%s", err.Error())
}
return -1
}
return db.IntDefault(ret, -1)
}
//KEYS 获取key集合
//@param {string} pattern 匹配模式
// Supported glob-style patterns:
// h?llo matches hello, hallo and hxllo
// h*llo matches hllo and heeeello
// h[ae]llo matches hello and hallo, but not hillo
// h[^e]llo matches hallo, hbllo, ... but not hello
// h[a-b]llo matches hallo and hbllo
// Use \ to escape special characters if you want to match them verbatim.
//@return 返回符合patten的key
func (r *RedisUtil) KEYS(pattern string) ([]string, error) {
if r.debug {
return []string{}, nil
}
rclient := r.pool.Get()
ret, err := rclient.Do("KEYS", r.prefix+pattern)
rclient.Close()
if err != nil {
if r.log != nil {
r.log.Error("[KEYS]失败:%s", err.Error())
}
return nil, err
}
return db.Strings(ret)
}
//GET 获取
//@return 如果key不存在返回空
func (r *RedisUtil) GET(key string) string {
if r.debug {
return ""
}
rclient := r.pool.Get()
key = r.prefix + key
ret, err := rclient.Do("GET", key)
rclient.Close()
if err != nil || ret == nil {
if r.log != nil {
r.log.Error("[GET]失败:%s", err.Error())
}
return ""
}
return db.StringDefault(ret, "")
}
//GETSET 获取旧值并设置新值
//@return 如果key不存在返回空
func (r *RedisUtil) GETSET(key, value string) string {
if r.debug {
return ""
}
rclient := r.pool.Get()
ret, err := rclient.Do("GETSET", r.prefix+key, value)
rclient.Close()
if err != nil || ret == nil {
if r.log != nil {
r.log.Error("[GETSET]失败:%s", err.Error())
}
return ""
}
return db.StringDefault(ret, "")
}
//GETEXP 获取值并更新过期时间
//@return 如果key不存在返回空
func (r *RedisUtil) GETEXP(key string, expireTime int64) string {
if r.debug {
return ""
}
rclient := r.pool.Get()
ret, err := rclient.Do("GET", r.prefix+key)
if err != nil || ret == nil {
if r.log != nil {
r.log.Error("[GETEXP]:%s", err.Error())
}
rclient.Close()
return ""
}
rclient.Do("EXPIRE", r.prefix+key, expireTime)
rclient.Close()
return db.StringDefault(ret, "")
}
//GetConn 获取redis链接
func (r *RedisUtil) GetConn(fun func(redis.Conn)) {
rclient := r.pool.Get()
fun(rclient)
rclient.Close()
}
// 获取集合所有值
func (r *RedisUtil) SMEMBERS(key string) ([]string, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("SMEMBERS", r.prefix+key)
rclient.Close()
if err != nil {
return nil, err
}
return db.Strings(ret)
}
//原子操作
func (r *RedisUtil) INCRBY(key string, increment int64) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("INCRBY", r.prefix+key, increment)
rclient.Close()
return db.Int64Default(ret), err
}
// 将元素添加到集合,返回0/1(失败/成功)
func (r *RedisUtil) SADD(key, member string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("SADD", r.prefix+key, member)
rclient.Close()
return db.Int64Default(ret), err
}
// 将元素添加有序集合,返回0/1(失败/成功)
func (r *RedisUtil) ZADD(key string, score float64, member string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("ZADD", r.prefix+key, score, member)
rclient.Close()
return db.Int64Default(ret), err
}
// 返回有序集合成员score值
func (r *RedisUtil) ZSCORE(key string, member string) (float64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("ZSCORE", r.prefix+key, member)
rclient.Close()
return db.Float64Default(ret), err
}
// 返回有序集合key中,指定区间的成员(按score从大到小排序)
func (r *RedisUtil) ZREVRANGE(key string, start, stop int64, withscores bool) ([]string, error) {
args := []interface{}{
r.prefix + key,
start,
stop,
}
if withscores {
args = append(args, "WITHSCORES")
}
rclient := r.pool.Get()
ret, err := rclient.Do("ZREVRANGE", args...)
rclient.Close()
if err != nil {
return nil, err
}
return db.Strings(ret)
}
// 返回有序集合key中,指定区间的成员(按score从小到大排序)
func (r *RedisUtil) ZRANGE(key string, start, stop int64, withscores bool) ([]string, error) {
args := []interface{}{
r.prefix + key,
start,
stop,
}
if withscores {
args = append(args, "WITHSCORES")
}
rclient := r.pool.Get()
ret, err := rclient.Do("ZRANGE", args...)
rclient.Close()
if err != nil {
return nil, err
}
return db.Strings(ret)
}
// 返回有序集合key中,指定成员的排名(按score从小到大排序),第一名为0
func (r *RedisUtil) ZRANK(key string, member string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("ZRANK", r.prefix+key, member)
rclient.Close()
return db.Int64Default(ret), err
}
// 返回有序集合key中,指定成员的排名(按score从大到小排序),第一名为0
func (r *RedisUtil) ZREVRANK(key string, member string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("ZREVRANK", r.prefix+key, member)
rclient.Close()
return db.Int64Default(ret), err
}
// 移除有序集合key中指定成员的排名,返回移除数量
func (r *RedisUtil) ZREM(key string, member string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("ZREM", r.prefix+key, member)
rclient.Close()
return db.Int64Default(ret), err
}
// 移除集合key中指定成员的排名,返回移除数量
func (r *RedisUtil) SREM(key string, member string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("SREM", r.prefix+key, member)
rclient.Close()
return db.Int64Default(ret), err
}
// 返回集合key成员数量
func (r *RedisUtil) SCARD(key string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("SCARD", r.prefix+key)
rclient.Close()
return db.Int64Default(ret), err
}
// 返回有序集合key成员数量
func (r *RedisUtil) ZCARD(key string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("ZCARD", r.prefix+key)
rclient.Close()
return db.Int64Default(ret), err
}
// 为有序集合key成员score增加值
func (r *RedisUtil) ZINCRBY(key string, increment int64, member string) (int64, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("ZINCRBY", r.prefix+key, increment, member)
rclient.Close()
return db.Int64Default(ret), err
}
// 判断序集合key是否包含成员member
func (r *RedisUtil) SISMEMBER(key string, member string) bool {
rclient := r.pool.Get()
ret, err := rclient.Do("SISMEMBER", r.prefix+key, member)
rclient.Close()
if err != nil {
return false
}
return db.Int64Default(ret) == 1
}
// 批量获取
func (r *RedisUtil) MGET(keys ...string) ([]string, error) {
rclient := r.pool.Get()
args := make([]interface{}, len(keys))
for i, v := range keys {
args[i] = r.prefix + v
}
ret, err := rclient.Do("MGET", args...)
rclient.Close()
if err != nil {
return nil, err
}
return db.Strings(ret)
}
// 按key的正则方式批量获取
func (r *RedisUtil) MGETWithKeyPattern(pattern string) ([]*RedisKeyValue, error) {
rclient := r.pool.Get()
ret, err := rclient.Do("KEYS", r.prefix+pattern)
if err != nil {
return nil, err
}
args, _ := ret.([]interface{})
ret, err = rclient.Do("MGET", args...)
rclient.Close()
if err != nil {
return nil, err
}
valueRet, _ := db.Strings(ret)
result := make([]*RedisKeyValue, len(args))
for i, v := range args {
result[i] = &RedisKeyValue{Key: db.StringDefault(v)}
if len(valueRet) > i {
result[i].Value = valueRet[i]
}
}
return result, nil
}
// redis分布式锁对象
func (r *RedisUtil) Mutex(key string, options ...redsync.Option) *redsync.Mutex {
return r.redsync.NewMutex(r.prefix+key, options...)
}
// redis键值
type RedisKeyValue struct {
Key string
Value string
}