alluxio.security.group

Class CachedGroupMapping

java.lang.Object

alluxio.security.group.CachedGroupMapping

All Implemented Interfaces:

GroupMappingService

public class CachedGroupMapping
extends Object
implements GroupMappingService

Class to map user to groups. It maintains a cache for user to groups mapping. The underlying implementation depends on GroupMappingService.

Nested Class Summary

Nested classes/interfaces inherited from interface alluxio.security.group.GroupMappingService

GroupMappingService.Factory

Constructor Summary

Constructors

Constructor and Description
CachedGroupMapping(GroupMappingService service, long groupMappingCacheTimeoutMs) Constructor with specified GroupMappingService.

Method Summary

Modifier and Type	Method and Description
List<String>	getGroups(String user) Gets 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

CachedGroupMapping

public CachedGroupMapping(GroupMappingService service,
                          long groupMappingCacheTimeoutMs)

Constructor with specified GroupMappingService. Initializes the cache if enabled.

Parameters:

service - group mapping service

groupMappingCacheTimeoutMs - The timeout in millseconds before we should reload the cache

Method Detail

getGroups

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

Description copied from interface: GroupMappingService

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

Specified by:

getGroups in interface GroupMappingService

Parameters:

user - user's name

Returns:

group memberships of user

Throws:

IOException