Package org.apache.hadoop.security

Class JniBasedUnixGroupsMappingWithFallback

java.lang.Object

org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback

All Implemented Interfaces:

GroupMappingServiceProvider

public class JniBasedUnixGroupsMappingWithFallback
extends java.lang.Object
implements GroupMappingServiceProvider

Field Summary

Fields inherited from interface org.apache.hadoop.security.GroupMappingServiceProvider

GROUP_MAPPING_CONFIG_PREFIX

Constructor Summary

Constructors

Constructor	Description
JniBasedUnixGroupsMappingWithFallback()

Method Summary

Modifier and Type	Method	Description
void	cacheGroupsAdd(java.util.List<java.lang.String> groups)	Caches the group user information
void	cacheGroupsRefresh()	Refresh the cache of groups and user mapping
java.util.List<java.lang.String>	getGroups(java.lang.String user)	Get all various group memberships of a given user.
java.util.Set<java.lang.String>	getGroupsSet(java.lang.String user)	Get all various group memberships of a given user.

Methods inherited from class java.lang.Object

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

Constructor Detail

JniBasedUnixGroupsMappingWithFallback

public JniBasedUnixGroupsMappingWithFallback()

Method Detail

getGroups

public java.util.List<java.lang.String> getGroups(java.lang.String user)
                                           throws java.io.IOException

Description copied from interface: GroupMappingServiceProvider

Get all various group memberships of a given user. Returns EMPTY list in case of non-existing user

Specified by:

getGroups in interface GroupMappingServiceProvider

Parameters:

user - User's name

Returns:

group memberships of user

Throws:

java.io.IOException - raised on errors performing I/O.

cacheGroupsRefresh

public void cacheGroupsRefresh()
                        throws java.io.IOException

Description copied from interface: GroupMappingServiceProvider

Refresh the cache of groups and user mapping

Specified by:

cacheGroupsRefresh in interface GroupMappingServiceProvider

Throws:

java.io.IOException - raised on errors performing I/O.

cacheGroupsAdd

public void cacheGroupsAdd(java.util.List<java.lang.String> groups)
                    throws java.io.IOException

Description copied from interface: GroupMappingServiceProvider

Caches the group user information

Specified by:

cacheGroupsAdd in interface GroupMappingServiceProvider

Parameters:

groups - list of groups to add to cache

Throws:

java.io.IOException - raised on errors performing I/O.

getGroupsSet

public java.util.Set<java.lang.String> getGroupsSet(java.lang.String user)
                                             throws java.io.IOException

Description copied from interface: GroupMappingServiceProvider

Get all various group memberships of a given user. Returns EMPTY set in case of non-existing user

Specified by:

getGroupsSet in interface GroupMappingServiceProvider

Parameters:

user - User's name

Returns:

set of group memberships of user

Throws:

java.io.IOException - raised on errors performing I/O.