org.apache.hadoop.security

类 Groups

java.lang.Object

org.apache.hadoop.security.Groups

public class Groups
extends Object

A user-to-groups mapping service. Groups allows for server to get the various group memberships of a given user via the getGroups(String) call, thus ensuring a consistent user-to-groups mapping and protects against vagaries of different mappings on servers and clients in a Hadoop cluster.

构造器概要

构造器

构造器和说明
Groups(Configuration conf)

方法概要

方法

限定符和类型	方法和说明
void	cacheGroupsAdd(List<String> groups)
List<String>	getGroups(String user) Get the group memberships of a given user.
static Groups	getUserToGroupsMappingService() Get the groups being used to map user-to-groups.
static Groups	getUserToGroupsMappingService(Configuration conf)
void	refresh() Refresh all user-to-groups mappings.

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

Groups

public Groups(Configuration conf)

方法详细资料

getGroups

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

Get the group memberships of a given user.

参数:

user - User's name

返回:

the group memberships of the user

抛出:

IOException

refresh

public void refresh()

Refresh all user-to-groups mappings.

cacheGroupsAdd

public void cacheGroupsAdd(List<String> groups)

getUserToGroupsMappingService

public static Groups getUserToGroupsMappingService()

Get the groups being used to map user-to-groups.

返回:

the groups being used to map user-to-groups.

getUserToGroupsMappingService

public static Groups getUserToGroupsMappingService(Configuration conf)