public virtual DirectoryWithSnapshotFeature AddSnapshotFeature(DirectoryWithSnapshotFeature.DirectoryDiffList
diffs)
{
Preconditions.CheckState(!IsWithSnapshot(), "Directory is already with snapshot");
DirectoryWithSnapshotFeature sf = new DirectoryWithSnapshotFeature(diffs);
AddFeature(sf);
return(sf);
}
/// <summary>
/// Search for the given INode in the children list and the deleted lists of
/// snapshots.
/// </summary>
/// <returns>
///
/// <see cref="Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.CurrentStateId
/// "/>
/// if the inode is in the children
/// list;
/// <see cref="Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.NoSnapshotId"
/// />
/// if the inode is neither in the
/// children list nor in any snapshot; otherwise the snapshot id of the
/// corresponding snapshot diff list.
/// </returns>
public virtual int SearchChild(INode inode)
{
INode child = GetChild(inode.GetLocalNameBytes(), Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot
.CurrentStateId);
if (child != inode)
{
// inode is not in parent's children list, thus inode must be in
// snapshot. identify the snapshot id and later add it into the path
DirectoryWithSnapshotFeature.DirectoryDiffList diffs = GetDiffs();
if (diffs == null)
{
return(Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.NoSnapshotId);
}
return(diffs.FindSnapshotDeleted(inode));
}
else
{
return(Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.CurrentStateId);
}
}
