示例#1
0
文件: zk.go 项目: jackwanger/tyrant
func DeleteRecursive(zconn zookeeper.Conn, zkPath string, version int) error {
	// version: -1 delete any version of the node at path - only applies to the top node
	err := zconn.Delete(zkPath, int32(version))
	if err == nil {
		return nil
	}
	if !ZkErrorEqual(err, zookeeper.ErrNotEmpty) {
		return err
	}
	// Remove the ability for other nodes to get created while we are trying to delete.
	// Otherwise, you can enter a race condition, or get starved out from deleting.
	_, err = zconn.SetACL(zkPath, zookeeper.WorldACL(zookeeper.PermAdmin|zookeeper.PermDelete|zookeeper.PermRead), int32(version))
	if err != nil {
		return err
	}
	children, _, err := zconn.Children(zkPath)
	if err != nil {
		return err
	}
	for _, child := range children {
		err := DeleteRecursive(zconn, path.Join(zkPath, child), -1)
		if err != nil && !ZkErrorEqual(err, zookeeper.ErrNoNode) {
			return fmt.Errorf("zkutil: recursive delete failed: %v", err)
		}
	}

	err = zconn.Delete(zkPath, int32(version))
	if err != nil && !ZkErrorEqual(err, zookeeper.ErrNotEmpty) {
		err = fmt.Errorf("zkutil: nodes getting recreated underneath delete (app race condition): %v", zkPath)
	}
	return err
}