org.apache.hadoop.security
Interface GroupMappingServiceProvider

All Known Implementing Classes:

JniBasedUnixGroupsMapping

@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface GroupMappingServiceProvider

An interface for the implementation of a user-to-groups mapping service used by Groups.

Method Summary

List<String>

getGroups(String user) Get all various group memberships of a given user.

Method Detail

getGroups

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