org.apache.hadoop.security

类 JniBasedUnixGroupsNetgroupMapping

java.lang.Object

org.apache.hadoop.security.JniBasedUnixGroupsMapping

org.apache.hadoop.security.JniBasedUnixGroupsNetgroupMapping

public class JniBasedUnixGroupsNetgroupMapping
extends JniBasedUnixGroupsMapping

A JNI-based implementation of GroupMappingServiceProvider that invokes libC calls to get the group memberships of a given user.

构造器概要

构造器

构造器和说明
JniBasedUnixGroupsNetgroupMapping()

方法概要

方法

限定符和类型	方法和说明
void	cacheGroupsAdd(List<String> groups) Caches the group user information
void	cacheGroupsRefresh() Refresh the cache of groups and user mapping
List<String>	getGroups(String user) Gets unix groups and netgroups for the user.
protected List<String>	getUsersForNetgroup(String netgroup) Calls JNI function to get users for a netgroup, since C functions are not reentrant we need to make this synchronized (see documentation for setnetgrent, getnetgrent and endnetgrent)

从类继承的方法 java.lang.Object

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

构造器详细资料

JniBasedUnixGroupsNetgroupMapping

public JniBasedUnixGroupsNetgroupMapping()

方法详细资料

getGroups

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

Gets unix groups and netgroups for the user. It gets all unix groups as returned by id -Gn but it only returns netgroups that are used in ACLs (there is no way to get all netgroups for a given user, see documentation for getent netgroup)

覆盖:

getGroups 在类中 JniBasedUnixGroupsMapping

参数:

user - User's name

返回:

group memberships of user

抛出:

IOException

cacheGroupsRefresh

public void cacheGroupsRefresh()
                        throws IOException

Refresh the cache of groups and user mapping

覆盖:

cacheGroupsRefresh 在类中 JniBasedUnixGroupsMapping

抛出:

IOException

cacheGroupsAdd

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

Caches the group user information

覆盖:

cacheGroupsAdd 在类中 JniBasedUnixGroupsMapping

参数:

groups - list of groups to add to cache

抛出:

IOException

getUsersForNetgroup

protected List<String> getUsersForNetgroup(String netgroup)

Calls JNI function to get users for a netgroup, since C functions are not reentrant we need to make this synchronized (see documentation for setnetgrent, getnetgrent and endnetgrent)