redis分布式锁的go-redis实现方法详解

package redis

import (
 "context"
 "github.com/go-redis/redis/v8"
 "github.com/taoshihan1991/miaosha/setting"
 "log"
 "sync"
 "time"
)

var rdb *redis.Client
var ctx = context.Background()
var mutex sync.Mutex

func NewRedis() {
 rdb = redis.NewClient(&redis.Options{
  Addr:  setting.Redis.Ip + ":" + setting.Redis.Port,
  Password: "", // no password set
  DB:  0, // use default DB
 })
}
func Lock(key string) bool {
 mutex.Lock()
 defer mutex.Unlock()
 bool, err := rdb.SetNX(ctx, key, 1, 10*time.Second).Result()
 if err != nil {
  log.Println(err.Error())
 }
 return bool
}
func UnLock(key string) int64 {
 nums, err := rdb.Del(ctx, key).Result()
 if err != nil {
  log.Println(err.Error())
  return 0
 }
 return nums
}