hotime/cache/cache_db.go
2021-05-25 20:27:24 +08:00

161 lines
3.6 KiB
Go

package cache
import (
. "../common"
"database/sql"
"encoding/json"
"strings"
"time"
)
type HoTimeDBInterface interface {
Query(query string, args ...interface{}) []Map
Exec(query string, args ...interface{}) (sql.Result, *Error)
Get(table string, qu ...interface{}) Map
Select(table string, qu ...interface{}) []Map
Delete(table string, data map[string]interface{}) int64
Update(table string, data Map, where Map) int64
Insert(table string, data map[string]interface{}) int64
GetType() string
}
type CacheDb struct {
Time int64
Db HoTimeDBInterface
Error
ContextBase
isInit bool
}
func (that *CacheDb) initDbTable() {
if that.isInit {
return
}
if that.Db.GetType() == "mysql" {
dbNames := that.Db.Query("SELECT DATABASE()")
if len(dbNames) == 0 {
return
}
dbName := dbNames[0].GetString("DATABASE()")
res := that.Db.Query("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='" + dbName + "' AND TABLE_NAME='cached'")
if len(res) != 0 {
that.isInit = true
return
}
_, e := that.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` bigint(20) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=198740 DEFAULT CHARSET=utf8")
if e.GetError() == nil {
that.isInit = true
}
}
if that.Db.GetType() == "sqlite" {
res := that.Db.Query(`select * from sqlite_master where type = 'table' and name = 'cached'`)
if len(res) != 0 {
that.isInit = true
return
}
_, e := that.Db.Exec(`CREATE TABLE "cached" (
"id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
"ckey" TEXT(60),
"cvalue" TEXT(2000),
"time" integer,
"endtime" integer
);`)
if e.GetError() == nil {
that.isInit = true
}
}
}
//获取Cache键只能为string类型
func (that *CacheDb) get(key string) interface{} {
cached := that.Db.Get("cached", "*", Map{"ckey": key})
if cached == nil {
return nil
}
//data:=cacheMap[key];
if cached.GetInt64("endtime") <= time.Now().Unix() {
that.Db.Delete("cached", Map{"id": cached.GetString("id")})
return nil
}
data := Map{}
data.JsonToMap(cached.GetString("cvalue"))
return data.Get("data")
}
//key value ,时间为时间戳
func (that *CacheDb) set(key string, value interface{}, tim int64) {
bte, _ := json.Marshal(Map{"data": value})
num := that.Db.Update("cached", Map{"cvalue": string(bte), "time": time.Now().UnixNano(), "endtime": tim}, Map{"ckey": key})
if num == int64(0) {
that.Db.Insert("cached", Map{"cvalue": string(bte), "time": time.Now().UnixNano(), "endtime": tim, "ckey": key})
}
//随机执行删除命令
if Rand(1000) > 950 {
that.Db.Delete("cached", Map{"endtime[<]": time.Now().Unix()})
}
}
func (that *CacheDb) delete(key string) {
del := strings.Index(key, "*")
//如果通配删除
if del != -1 {
key = Substr(key, 0, del)
that.Db.Delete("cached", Map{"ckey": key + "%"})
} else {
that.Db.Delete("cached", Map{"ckey": key})
}
}
func (that *CacheDb) Cache(key string, data ...interface{}) *Obj {
that.initDbTable()
if len(data) == 0 {
return &Obj{Data: that.get(key)}
}
tim := time.Now().Unix()
if len(data) == 1 && data[0] == nil {
that.delete(key)
return &Obj{Data: nil}
}
if len(data) == 1 {
if that.Time == 0 {
//that.Time = Config.GetInt64("cacheLongTime")
}
tim += that.Time
}
if len(data) == 2 {
that.SetError(nil)
tempt := ObjToInt64(data[1], &that.Error)
if tempt > tim {
tim = tempt
} else if that.GetError() == nil {
tim = tim + tempt
}
}
that.set(key, data[0], tim)
return &Obj{Data: nil}
}