/// <summary>Set the given snapshottable directory to non-snapshottable.</summary>
/// <exception cref="Org.Apache.Hadoop.Hdfs.Protocol.SnapshotException">if there are snapshots in the directory.
/// </exception>
/// <exception cref="System.IO.IOException"/>
public virtual void ResetSnapshottable(string path)
{
INodesInPath iip = fsdir.GetINodesInPath4Write(path);
INodeDirectory d = INodeDirectory.ValueOf(iip.GetLastINode(), path);
DirectorySnapshottableFeature sf = d.GetDirectorySnapshottableFeature();
if (sf == null)
{
// the directory is already non-snapshottable
return;
}
if (sf.GetNumSnapshots() > 0)
{
throw new SnapshotException("The directory " + path + " has snapshot(s). " + "Please redo the operation after removing all the snapshots."
);
}
if (d == fsdir.GetRoot())
{
d.SetSnapshotQuota(0);
}
else
{
d.RemoveSnapshottableFeature();
}
RemoveSnapshottable(d);
}
/// <summary>Save snapshots and snapshot quota for a snapshottable directory.</summary>
/// <param name="current">The directory that the snapshots belongs to.</param>
/// <param name="out">
/// The
/// <see cref="System.IO.DataOutput"/>
/// to write.
/// </param>
/// <exception cref="System.IO.IOException"/>
public static void SaveSnapshots(INodeDirectory current, DataOutput @out)
{
DirectorySnapshottableFeature sf = current.GetDirectorySnapshottableFeature();
Preconditions.CheckArgument(sf != null);
// list of snapshots in snapshotsByNames
ReadOnlyList <Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot> snapshots =
sf.GetSnapshotList();
@out.WriteInt(snapshots.Size());
foreach (Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot s in snapshots)
{
// write the snapshot id
@out.WriteInt(s.GetId());
}
// snapshot quota
@out.WriteInt(sf.GetSnapshotQuota());
}
/// <summary>Load snapshots and snapshotQuota for a Snapshottable directory.</summary>
/// <param name="snapshottableParent">The snapshottable directory for loading.</param>
/// <param name="numSnapshots">The number of snapshots that the directory has.</param>
/// <param name="loader">The loader</param>
/// <exception cref="System.IO.IOException"/>
public static void LoadSnapshotList(INodeDirectory snapshottableParent, int numSnapshots
, DataInput @in, FSImageFormat.Loader loader)
{
DirectorySnapshottableFeature sf = snapshottableParent.GetDirectorySnapshottableFeature
();
Preconditions.CheckArgument(sf != null);
for (int i = 0; i < numSnapshots; i++)
{
// read snapshots
Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot s = loader.GetSnapshot(@in
);
s.GetRoot().SetParent(snapshottableParent);
sf.AddSnapshot(s);
}
int snapshotQuota = @in.ReadInt();
snapshottableParent.SetSnapshotQuota(snapshotQuota);
}
public _IEnumerable_416(DirectorySnapshottableFeature _enclosing)
{
this._enclosing = _enclosing;
}
