func (this *SQLServer) AddObserver(observer Observer) {
this.obsevers = append(this.obsevers, observer)
zkm.AddObserver(zkm.MakeDatabaseGroup(DB_DRIVER_POSTGRES, observer.Group()), this)
//request when register
this.requestDatabaseList(observer)
}
func (this *SQLServer) AddObserver(observer Observer) {
this.obsevers = append(this.obsevers, observer)
zkm.AddObserver(zkm.Database.MakeDatabaseGroup(DB_DRIVER_POSTGRES, observer.Group()), this)
//request when register
this.requestDatabaseList(observer)
//add self
observer.OnUpdateDatabaseList(this.master, this.slaves)
}