org.apache.hadoop.security
Class JniBasedUnixGroupsMapping

java.lang.Object
  extended by org.apache.hadoop.security.JniBasedUnixGroupsMapping
Direct Known Subclasses:
JniBasedUnixGroupsNetgroupMapping

public class JniBasedUnixGroupsMapping
extends Object

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


Constructor Summary
JniBasedUnixGroupsMapping()
           
 
Method Summary
 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)
          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

JniBasedUnixGroupsMapping

public JniBasedUnixGroupsMapping()
Method Detail

getGroups

public List<String> getGroups(String user)
                       throws IOException
Get all various group memberships of a given user. Returns EMPTY list in case of non-existing user

Parameters:
user - User's name
Returns:
group memberships of user
Throws:
IOException

cacheGroupsRefresh

public void cacheGroupsRefresh()
                        throws IOException
Refresh the cache of groups and user mapping

Throws:
IOException

cacheGroupsAdd

public void cacheGroupsAdd(List<String> groups)
                    throws IOException
Caches the group user information

Parameters:
groups - list of groups to add to cache
Throws:
IOException


Copyright © 2009 The Apache Software Foundation