org.apache.hadoop.security

Class ShellBasedUnixGroupsMapping

java.lang.Object

org.apache.hadoop.security.ShellBasedUnixGroupsMapping

All Implemented Interfaces:

GroupMappingServiceProvider

Direct Known Subclasses:

ShellBasedUnixGroupsNetgroupMapping

@InterfaceAudience.LimitedPrivate(value={"HDFS","MapReduce"})
@InterfaceStability.Evolving
public class ShellBasedUnixGroupsMapping
extends Object
implements GroupMappingServiceProvider

A simple shell-based implementation of GroupMappingServiceProvider that exec's the groups shell command to fetch the group memberships of a given user.

Constructor Summary

Constructors

Constructor and Description
ShellBasedUnixGroupsMapping()

Method Summary

Methods

Modifier and Type	Method and Description
void	cacheGroupsAdd(List<String> groups) Adds groups to cache, no need to do that for this provider
void	cacheGroupsRefresh() Caches groups, no need to do that for this provider
List<String>	getGroups(String user) Returns list of groups for a user

Methods inherited from class java.lang.Object

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

Constructor Detail

ShellBasedUnixGroupsMapping

public ShellBasedUnixGroupsMapping()

Method Detail

getGroups

public List<String> getGroups(String user)
                       throws IOException

Returns list of groups for a user

Specified by:

getGroups in interface GroupMappingServiceProvider

Parameters:

user - get groups for this user

Returns:

list of groups for a given user

Throws:

IOException

cacheGroupsRefresh

public void cacheGroupsRefresh()
                        throws IOException

Caches groups, no need to do that for this provider

Specified by:

cacheGroupsRefresh in interface GroupMappingServiceProvider

Throws:

IOException

cacheGroupsAdd

public void cacheGroupsAdd(List<String> groups)
                    throws IOException

Adds groups to cache, no need to do that for this provider

Specified by:

cacheGroupsAdd in interface GroupMappingServiceProvider

Parameters:

groups - unused

Throws:

IOException