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 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) {
var exist bool
var err error
for {
exist, err = zkhelper.NodeExists(top.zkConn, path)
if err == nil || top.IsFatalErr(err) {
break
} else {
time.Sleep(ZK_RECONNECT_INTERVAL * time.Second)
}
if err != nil {
log.ErrorErrorf(err, " Exist ")
}
}
return exist, err
}
func (top *Topology) Exist(path string) (bool, error) {
return zkhelper.NodeExists(top.zkConn, path)
}
func ActionGC(zkConn zkhelper.Conn, productName string, gcType int, keep int) error {
prefix := GetWatchActionPath(productName)
respPrefix := GetActionResponsePath(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)
// keep last 500 actions
if len(actions)-500 <= keep {
return nil
}
for _, action := range actions[:len(actions)-keep-500] {
if err := zkhelper.DeleteRecursive(zkConn, path.Join(prefix, action), -1); err != nil {
return errors.Trace(err)
}
err := zkhelper.DeleteRecursive(zkConn, path.Join(respPrefix, action), -1)
if err != nil && !zkhelper.ZkErrorEqual(err, zk.ErrNoNode) {
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.Infof("action = %s, timestamp = %s", action, act.Ts)
ts, _ := strconv.ParseInt(act.Ts, 10, 64)
if currentTs-ts > int64(secs) {
if err := zkhelper.DeleteRecursive(zkConn, path.Join(prefix, action), -1); err != nil {
return errors.Trace(err)
}
err := zkhelper.DeleteRecursive(zkConn, path.Join(respPrefix, action), -1)
if err != nil && !zkhelper.ZkErrorEqual(err, zk.ErrNoNode) {
return errors.Trace(err)
}
}
}
actionResps, _, err := zkConn.Children(respPrefix)
if err != nil {
return errors.Trace(err)
}
for _, action := range actionResps {
b, _, err := zkConn.Get(path.Join(respPrefix, action))
if err != nil {
return errors.Trace(err)
}
if err := json.Unmarshal(b, &act); err != nil {
return errors.Trace(err)
}
log.Infof("action = %s, timestamp = %s", action, act.Ts)
ts, _ := strconv.ParseInt(act.Ts, 10, 64)
if currentTs-ts > int64(secs) {
if err := zkhelper.DeleteRecursive(zkConn, path.Join(respPrefix, action), -1); err != nil {
return errors.Trace(err)
}
}
}
}
return nil
}