org.apache.hadoop.hdfs.server.namenode

Class UGIResolver

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.UGIResolver

Direct Known Subclasses:

FsUGIResolver, SingleUGIResolver

@InterfaceAudience.Public
 @InterfaceStability.Unstable
public abstract class UGIResolver
extends Object

Pluggable class for mapping ownership and permissions from an external store to an FSImage.

Constructor Summary

Constructors

Constructor and Description
UGIResolver()

Method Summary

Modifier and Type	Method and Description
abstract void	addGroup(String name)
protected void	addGroup(String name, int id)
abstract void	addUser(String name)
protected void	addUser(String name, int id)
protected long	buildPermissionStatus(String owner, String group, short permission) Permission is serialized as a 64-bit long.
String	group(FileStatus s)
FsPermission	permission(FileStatus s)
protected void	resetUGInfo()
long	resolve(FileStatus s)
Map<Integer,String>	ugiMap()
String	user(FileStatus s)

Methods inherited from class java.lang.Object

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

Constructor Detail

UGIResolver

public UGIResolver()

Method Detail

buildPermissionStatus

protected final long buildPermissionStatus(String owner,
                                           String group,
                                           short permission)

Permission is serialized as a 64-bit long. [0:24):[25:48):[48:64) (in Big Endian). The first and the second parts are the string ids of the user and group name, and the last 16 bits are the permission bits.

Parameters:

owner - name of owner

group - name of group

permission - Permission octects

Returns:

FSImage encoding of permissions

ugiMap

public Map<Integer,String> ugiMap()

addUser

public abstract void addUser(String name)

addUser

protected void addUser(String name,
                       int id)

addGroup

public abstract void addGroup(String name)

addGroup

protected void addGroup(String name,
                        int id)

resetUGInfo

protected void resetUGInfo()

resolve

public long resolve(FileStatus s)

user

public String user(FileStatus s)

group

public String group(FileStatus s)

permission

public FsPermission permission(FileStatus s)