/// <summary>Update xattrs of inode.</summary>
/// <remarks>
/// Update xattrs of inode.
/// <p/>
/// Must be called while holding the FSDirectory write lock.
/// </remarks>
/// <param name="inode">INode to update</param>
/// <param name="xAttrs">to update xAttrs.</param>
/// <param name="snapshotId">id of the latest snapshot of the inode</param>
/// <exception cref="Org.Apache.Hadoop.Hdfs.Protocol.QuotaExceededException"/>
public static void UpdateINodeXAttrs(INode inode, IList <XAttr> xAttrs, int snapshotId
)
{
if (xAttrs == null || xAttrs.IsEmpty())
{
if (inode.GetXAttrFeature() != null)
{
inode.RemoveXAttrFeature(snapshotId);
}
return;
}
// Dedupe the xAttr name and save them into a new interned list
IList <XAttr> internedXAttrs = Lists.NewArrayListWithCapacity(xAttrs.Count);
foreach (XAttr xAttr in xAttrs)
{
string name = xAttr.GetName();
string internedName = internedNames[name];
if (internedName == null)
{
internedName = name;
internedNames[internedName] = internedName;
}
XAttr internedXAttr = new XAttr.Builder().SetName(internedName).SetNameSpace(xAttr
.GetNameSpace()).SetValue(xAttr.GetValue()).Build();
internedXAttrs.AddItem(internedXAttr);
}
// Save the list of interned xattrs
ImmutableList <XAttr> newXAttrs = ImmutableList.CopyOf(internedXAttrs);
if (inode.GetXAttrFeature() != null)
{
inode.RemoveXAttrFeature(snapshotId);
}
inode.AddXAttrFeature(new XAttrFeature(newXAttrs), snapshotId);
}
internal SnapshotCopy(INode inode)
{
this.name = inode.GetLocalNameBytes();
this.permission = inode.GetPermissionLong();
if (inode.GetAclFeature() != null)
{
aclFeature = AclStorage.AddAclFeature(inode.GetAclFeature());
}
else
{
aclFeature = null;
}
this.modificationTime = inode.GetModificationTime();
this.accessTime = inode.GetAccessTime();
this.xAttrFeature = inode.GetXAttrFeature();
}
/// <summary>Reads the existing extended attributes of an inode.</summary>
/// <remarks>
/// Reads the existing extended attributes of an inode. If the
/// inode does not have an <code>XAttr</code>, then this method
/// returns an empty list.
/// <p/>
/// Must be called while holding the FSDirectory read lock.
/// </remarks>
/// <param name="inode">INode to read</param>
/// <param name="snapshotId"/>
/// <returns>List<XAttr> <code>XAttr</code> list.</returns>
public static IList <XAttr> ReadINodeXAttrs(INode inode, int snapshotId)
{
XAttrFeature f = inode.GetXAttrFeature(snapshotId);
return(f == null?ImmutableList.Of <XAttr>() : f.GetXAttrs());
}