Package org.apache.hadoop.hdfs.server.namenode

Class XAttrStorage

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.XAttrStorage

@Private
public class XAttrStorage
extends Object

XAttrStorage is used to read and set xattrs for an inode.

Constructor Summary

Constructors

Constructor	Description
XAttrStorage()

Method Summary

Modifier and Type	Method	Description
static org.apache.hadoop.fs.XAttr	readINodeXAttrByPrefixedName(INode inode, int snapshotId, String prefixedName)	Reads the extended attribute of an inode by name with prefix.
static List<org.apache.hadoop.fs.XAttr>	readINodeXAttrs(INodeAttributes inodeAttr)	Reads the existing extended attributes of an inode.
static void	updateINodeXAttrs(INode inode, List<org.apache.hadoop.fs.XAttr> xAttrs, int snapshotId)	Update xattrs of inode.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

XAttrStorage

public XAttrStorage()

Method Details

readINodeXAttrByPrefixedName

public static org.apache.hadoop.fs.XAttr readINodeXAttrByPrefixedName(INode inode,
 int snapshotId,
 String prefixedName)

Reads the extended attribute of an inode by name with prefix.

Parameters:

inode - INode to read

snapshotId - the snapshotId of the requested path

prefixedName - xAttr name with prefix

Returns:

the xAttr

readINodeXAttrs

public static List<org.apache.hadoop.fs.XAttr> readINodeXAttrs(INodeAttributes inodeAttr)

Reads the existing extended attributes of an inode.

Must be called while holding the FSDirectory read lock.

Parameters:

inodeAttr - INodeAttributes to read.

Returns:

XAttr list.

updateINodeXAttrs

public static void updateINodeXAttrs(INode inode,
 List<org.apache.hadoop.fs.XAttr> xAttrs,
 int snapshotId)
                              throws org.apache.hadoop.hdfs.protocol.QuotaExceededException

Update xattrs of inode.

Must be called while holding the FSDirectory write lock.

Parameters:

inode - INode to update

xAttrs - to update xAttrs.

snapshotId - id of the latest snapshot of the inode

Throws:

org.apache.hadoop.hdfs.protocol.QuotaExceededException