org.apache.hadoop.tools

Interface GetUserMappingsProtocol

All Known Subinterfaces:

NamenodeProtocols, ResourceManagerAdministrationProtocol

All Known Implementing Classes:

AdminService, GetUserMappingsProtocolClientSideTranslatorPB, ResourceManagerAdministrationProtocolPBClientImpl

@InterfaceAudience.LimitedPrivate(value={"HDFS","MapReduce"})
@InterfaceStability.Evolving
public interface GetUserMappingsProtocol

Protocol implemented by the Name Node and Job Tracker which maps users to groups.

Field Summary

Fields

Modifier and Type	Field and Description
static long	versionID Version 1: Initial version.

Method Summary

Methods

Modifier and Type	Method and Description
String[]	getGroupsForUser(String user) Get the groups which are mapped to the given user.

Field Detail

versionID

static final long versionID

Version 1: Initial version.

See Also:

Constant Field Values

Method Detail

getGroupsForUser

String[] getGroupsForUser(String user)
                          throws IOException

Get the groups which are mapped to the given user.

Parameters:

user - The user to get the groups for.

Returns:

The set of groups the user belongs to.

Throws:

IOException