org.apache.hadoop.mapred.gridmix

Class EchoUserResolver

java.lang.Object

org.apache.hadoop.mapred.gridmix.EchoUserResolver

All Implemented Interfaces:

UserResolver

public class EchoUserResolver
extends Object
implements UserResolver

Echos the UGI offered.

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
EchoUserResolver()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.security.UserGroupInformation	getTargetUgi(org.apache.hadoop.security.UserGroupInformation ugi) Map the given UGI to another per the subclass contract.
boolean	needsTargetUsersList() Indicates whether this user resolver needs a list of target users to be provided.
boolean	setTargetUsers(URI userdesc, org.apache.hadoop.conf.Configuration conf) Configure the user map given the URI and configuration.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

EchoUserResolver

public EchoUserResolver()

Method Detail

setTargetUsers

public boolean setTargetUsers(URI userdesc,
                              org.apache.hadoop.conf.Configuration conf)
                       throws IOException

Description copied from interface: UserResolver

Configure the user map given the URI and configuration. The resolver's contract will define how the resource will be interpreted, but the default will typically interpret the URI as a Path listing target users. This method should be called only if UserResolver.needsTargetUsersList() returns true.

Specified by:

setTargetUsers in interface UserResolver

Parameters:

userdesc - URI from which user information may be loaded per the subclass contract.

conf - The tool configuration.

Returns:

true if the resource provided was used in building the list of target users

Throws:

IOException

getTargetUgi

public org.apache.hadoop.security.UserGroupInformation getTargetUgi(org.apache.hadoop.security.UserGroupInformation ugi)

Description copied from interface: UserResolver

Map the given UGI to another per the subclass contract.

Specified by:

getTargetUgi in interface UserResolver

Parameters:

ugi - User information from the trace.

needsTargetUsersList

public boolean needsTargetUsersList()

Indicates whether this user resolver needs a list of target users to be provided.

Since EchoUserResolver simply returns the user's name passed as the argument, it doesn't need a target list of users.

Specified by:

needsTargetUsersList in interface UserResolver

Returns:

true if a list of target users is to be provided for this user resolver