1.增加redis支持 2.memcached支持多类型缓存

cache/redis.go

@@ -0,0 +1,104 @@
+package cache
+
+import (
+	"encoding/json"
+	"time"
+
+	"github.com/garyburd/redigo/redis"
+)
+
+//Redis redis cache
+type Redis struct {
+	conn *redis.Pool
+}
+
+//RedisOpts redis 连接属性
+type RedisOpts struct {
+	Host        string
+	Password    string
+	Database    int
+	MaxIdle     int
+	MaxActive   int
+	IdleTimeout time.Duration //second
+}
+
+//NewRedis 实例化
+func NewRedis(opts *RedisOpts) *Redis {
+	pool := &redis.Pool{
+		MaxActive:   opts.MaxActive,
+		MaxIdle:     opts.MaxIdle,
+		IdleTimeout: opts.IdleTimeout,
+		Dial: func() (redis.Conn, error) {
+			return redis.Dial("tcp", opts.Host,
+				redis.DialDatabase(opts.Database),
+				redis.DialPassword(opts.Password),
+			)
+		},
+		TestOnBorrow: func(conn redis.Conn, t time.Time) error {
+			if time.Since(t) < time.Minute {
+				return nil
+			}
+			_, err := conn.Do("PING")
+			return err
+		},
+	}
+	return &Redis{pool}
+}
+
+//Get 获取一个值
+func (r *Redis) Get(key string) interface{} {
+	conn := r.conn.Get()
+	defer conn.Close()
+
+	var data []byte
+	var err error
+	if data, err = redis.Bytes(conn.Do("GET", key)); err != nil {
+		return nil
+	}
+	var reply interface{}
+	if err = json.Unmarshal(data, &reply); err != nil {
+		return nil
+	}
+
+	return reply
+}
+
+//Set 设置一个值
+func (r *Redis) Set(key string, val interface{}, timeout time.Duration) (err error) {
+	conn := r.conn.Get()
+	defer conn.Close()
+
+	var data []byte
+	if data, err = json.Marshal(val); err != nil {
+		return
+	}
+
+	_, err = conn.Do("SETEX", key, int64(timeout/time.Second), data)
+
+	return
+}
+
+//IsExist 判断key是否存在
+func (r *Redis) IsExist(key string) bool {
+	conn := r.conn.Get()
+	defer conn.Close()
+
+	a, _ := conn.Do("EXISTS", key)
+	i := a.(int64)
+	if i > 0 {
+		return true
+	}
+	return false
+}
+
+//Delete 删除
+func (r *Redis) Delete(key string) error {
+	conn := r.conn.Get()
+	defer conn.Close()
+
+	if _, err := conn.Do("DEL", key); err != nil {
+		return err
+	}
+
+	return nil
+}