110 lines
2.2 KiB
Go
110 lines
2.2 KiB
Go
package cache
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import (
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"encoding/json"
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"time"
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"github.com/gomodule/redigo/redis"
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)
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// Redis redis cache
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type Redis struct {
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conn *redis.Pool
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}
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// RedisOpts redis 连接属性
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type RedisOpts struct {
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Host string `yml:"host" json:"host"`
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Password string `yml:"password" json:"password"`
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Database int `yml:"database" json:"database"`
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MaxIdle int `yml:"max_idle" json:"max_idle"`
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MaxActive int `yml:"max_active" json:"max_active"`
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IdleTimeout int32 `yml:"idle_timeout" json:"idle_timeout"` //second
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}
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// NewRedis 实例化
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func NewRedis(opts *RedisOpts) *Redis {
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pool := &redis.Pool{
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MaxActive: opts.MaxActive,
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MaxIdle: opts.MaxIdle,
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IdleTimeout: time.Second * time.Duration(opts.IdleTimeout),
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Dial: func() (redis.Conn, error) {
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return redis.Dial("tcp", opts.Host,
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redis.DialDatabase(opts.Database),
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redis.DialPassword(opts.Password),
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)
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},
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TestOnBorrow: func(conn redis.Conn, t time.Time) error {
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if time.Since(t) < time.Minute {
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return nil
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}
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_, err := conn.Do("PING")
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return err
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},
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}
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return &Redis{pool}
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}
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// SetConn 设置conn
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func (r *Redis) SetConn(conn *redis.Pool) {
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r.conn = conn
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}
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// Get 获取一个值
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func (r *Redis) Get(key string) interface{} {
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conn := r.conn.Get()
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defer conn.Close()
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var data []byte
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var err error
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if data, err = redis.Bytes(conn.Do("GET", key)); err != nil {
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return nil
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}
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var reply interface{}
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if err = json.Unmarshal(data, &reply); err != nil {
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return nil
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}
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return reply
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}
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// Set 设置一个值
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func (r *Redis) Set(key string, val interface{}, timeout time.Duration) (err error) {
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conn := r.conn.Get()
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defer conn.Close()
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var data []byte
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if data, err = json.Marshal(val); err != nil {
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return
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}
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_, err = conn.Do("SETEX", key, int64(timeout/time.Second), data)
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return
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}
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// IsExist 判断key是否存在
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func (r *Redis) IsExist(key string) bool {
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conn := r.conn.Get()
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defer conn.Close()
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a, _ := conn.Do("EXISTS", key)
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i := a.(int64)
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if i > 0 {
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return true
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}
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return false
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}
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// Delete 删除
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func (r *Redis) Delete(key string) error {
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conn := r.conn.Get()
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defer conn.Close()
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if _, err := conn.Do("DEL", key); err != nil {
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return err
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}
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return nil
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}
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