forked from golang/hotime
108 lines
2.4 KiB
Go
108 lines
2.4 KiB
Go
package hotime
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import (
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"encoding/json"
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"time"
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)
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type CacheDb struct {
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Time int64
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Db *HoTimeDB
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baseContext
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isInit bool
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}
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func (this *CacheDb) initDbTable() {
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if this.isInit {
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return
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}
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dbNames := this.Db.Query("SELECT DATABASE()")
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if len(dbNames) == 0 {
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return
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}
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dbName := dbNames[0].GetString("DATABASE()")
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res := this.Db.Query("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='" + dbName + "' AND TABLE_NAME='cached'")
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if len(res) == 0 {
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this.Db.Exec("CREATE TABLE `cached` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `ckey` varchar(60) DEFAULT NULL, `cvalue` varchar(2000) DEFAULT NULL, `time` bigint(20) DEFAULT NULL, `endtime` int(11) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=198740 DEFAULT CHARSET=utf8")
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}
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this.isInit = true
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}
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//获取Cache键只能为string类型
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func (this *CacheDb) get(key string) interface{} {
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cached := this.Db.Get("cached", "*", Map{"ckey": key})
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if cached == nil {
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return nil
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}
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//data:=cacheMap[key];
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if cached.GetInt64("endtime") <= time.Now().Unix() {
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this.Db.Delete("cached", Map{"id": cached.GetString("id")})
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return nil
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}
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data := Map{}
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data.JsonToMap(cached.GetString("cvalue"))
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return data.Get("data")
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}
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//key value ,时间为时间戳
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func (this *CacheDb) set(key string, value interface{}, tim int64) {
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bte, _ := json.Marshal(Map{"data": value})
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num := this.Db.Update("cached", Map{"cvalue": string(bte), "time": time.Now().UnixNano(), "endtime": tim}, Map{"ckey": key})
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if num == int64(0) {
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this.Db.Insert("cached", Map{"cvalue": string(bte), "time": time.Now().UnixNano(), "endtime": tim, "ckey": key})
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}
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//随机执行删除命令
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if Rand(1000) > 950 {
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this.Db.Delete("cached", Map{"endtime[<]": time.Now().Unix()})
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}
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}
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func (this *CacheDb) delete(key string) {
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this.Db.Delete("cached", Map{"ckey": key})
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}
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func (this *CacheDb) Cache(key string, data ...interface{}) *Obj {
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this.initDbTable()
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if len(data) == 0 {
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return &Obj{Data: this.get(key)}
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}
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tim := time.Now().Unix()
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if len(data) == 1 && data[0] == nil {
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this.delete(key)
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return &Obj{Data: nil}
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}
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if len(data) == 1 {
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if this.Time == 0 {
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this.Time = Config.GetInt64("cacheLongTime")
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}
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tim += this.Time
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}
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if len(data) == 2 {
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this.SetError(nil)
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tempt := ObjToInt64(data[1], &this.Error)
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if this.GetError() == nil {
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tim = tim + tempt
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}
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}
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this.set(key, data[0], tim)
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return &Obj{Data: nil}
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}
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