func (self *ServerGroup) Exists(zkConn zkhelper.Conn) (bool, error) {
zkPath := fmt.Sprintf("/zk/codis/db_%s/servers/group_%d", self.ProductName, self.Id)
b, err := zkhelper.NodeExists(zkConn, zkPath)
if err != nil {
return false, errors.Trace(err)
}
return b, nil
}
func (sg *ServerGroup) Exists(coordConn zkhelper.Conn) (bool, error) {
coordPath := fmt.Sprintf("/zk/reborn/db_%s/servers/group_%d", sg.ProductName, sg.Id)
b, err := zkhelper.NodeExists(coordConn, coordPath)
if err != nil {
return false, errors.Trace(err)
}
return b, nil
}
func ActionGC(zkConn zkhelper.Conn, productName string, gcType int, keep int) error {
prefix := GetWatchActionPath(productName)
exists, err := zkhelper.NodeExists(zkConn, prefix)
if err != nil {
return errors.Trace(err)
}
if !exists {
// if action path not exists just return nil
return nil
}
actions, _, err := zkConn.Children(prefix)
if err != nil {
return errors.Trace(err)
}
var act Action
currentTs := time.Now().Unix()
if gcType == GC_TYPE_N {
sort.Strings(actions)
if len(actions) <= keep {
return nil
}
for _, action := range actions[:len(actions)-keep] {
if err := zkhelper.DeleteRecursive(zkConn, path.Join(prefix, action), -1); err != nil {
return errors.Trace(err)
}
}
} else if gcType == GC_TYPE_SEC {
secs := keep
for _, action := range actions {
b, _, err := zkConn.Get(path.Join(prefix, action))
if err != nil {
return errors.Trace(err)
}
if err := json.Unmarshal(b, &act); err != nil {
return errors.Trace(err)
}
log.Info(action, act.Ts)
ts, _ := strconv.ParseInt(act.Ts, 10, 64)
if currentTs-ts > int64(secs) {
if err := zkConn.Delete(path.Join(prefix, action), -1); err != nil {
return errors.Trace(err)
}
}
}
}
return nil
}
func CreateActionRootPath(zkConn zkhelper.Conn, path string) error {
// if action dir not exists, create it first
exists, err := zkhelper.NodeExists(zkConn, path)
if err != nil {
return errors.Trace(err)
}
if !exists {
_, err := zkhelper.CreateOrUpdate(zkConn, path, "", 0, zkhelper.DefaultDirACLs(), true)
if err != nil {
return errors.Trace(err)
}
}
return nil
}
func (top *Topology) Exist(path string) (bool, error) {
return zkhelper.NodeExists(top.coordConn, path)
}