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) requestDatabaseList(observer Observer) {
defer logger.CatchException()
for {
sl, _, err := zkm.ChildrenW(zkm.MakeDatabaseGroup(DB_DRIVER_POSTGRES, observer.Group()))
if err != nil {
logger.Errorf("zkm.ChildrenW failed! err=%v", err)
time.Sleep(5 * time.Second)
continue
}
var master []zkm.DBServerInfo
var slaves []zkm.DBServerInfo
var node zkm.DBServerInfo
for _, s := range sl {
if err := json.Unmarshal([]byte(s), &node); err != nil {
logger.Errorf("requestDatabaseList failed! parse.err=%v", err)
continue
}
if len(node.Slaveof) == 0 {
master = append(master, node)
} else {
slaves = append(slaves, node)
}
}
this.Lock()
defer this.Unlock()
this.master = master
this.slaves = slaves
observer.OnUpdateDatabaseList(master, slaves)
return
}
}