12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152 |
- /*
- * @description:
- * @Author: CP
- * @Date: 2020-08-20 22:25:17
- * @FilePath: \construction_management\datasource\dbhelper.go
- */
- package datasource
- import (
- "fmt"
- "log"
- "sync"
- _ "github.com/go-sql-driver/mysql"
- "github.com/go-xorm/xorm"
- "go.mod/conf"
- )
- //互斥锁
- var dbLock sync.Mutex
- var masterInstance *xorm.Engine
- //单例模式
- func InstanceDbMaster() *xorm.Engine {
- if masterInstance != nil {
- return masterInstance
- }
- dbLock.Lock()
- defer dbLock.Unlock()
- if masterInstance != nil {
- return masterInstance
- }
- return NewDbMaster()
- }
- func NewDbMaster() *xorm.Engine {
- sourcename := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8",
- conf.DbMaster.User,
- conf.DbMaster.Pwd,
- conf.DbMaster.Host,
- conf.DbMaster.Port,
- conf.DbMaster.Datebase)
- instance, err := xorm.NewEngine(conf.DriverName, sourcename)
- if err != nil {
- log.Fatal("dbhelper.NewDbMaster NewEngine error ", err)
- return nil
- }
- //展示执行的sql语句
- instance.ShowSQL(true)
- masterInstance = instance
- return instance
- }
|