org.apache.hadoop.tools
Class GetGroupsBase

java.lang.Object
  org.apache.hadoop.conf.Configured
      org.apache.hadoop.tools.GetGroupsBase

All Implemented Interfaces:

Configurable, Tool

Direct Known Subclasses:

GetGroups

public abstract class GetGroupsBase
extends Configured
implements Tool

Base class for the HDFS and MR implementations of tools which fetch and display the groups that users belong to.

Constructor Summary

protected	GetGroupsBase(Configuration conf) Create an instance of this tool using the given configuration.
protected	GetGroupsBase(Configuration conf, PrintStream out) Used exclusively for testing.

Method Summary

protected abstract InetSocketAddress	getProtocolAddress(Configuration conf) Must be overridden by subclasses to get the address where the GetUserMappingsProtocol implementation is running.
int	run(String[] args) Get the groups for the users given and print formatted output to the PrintStream configured earlier.

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Constructor Detail

GetGroupsBase

protected GetGroupsBase(Configuration conf)

Create an instance of this tool using the given configuration.

Parameters:

conf -

GetGroupsBase

protected GetGroupsBase(Configuration conf,
                        PrintStream out)

Used exclusively for testing.

Parameters:

conf - The configuration to use.

out - The PrintStream to write to, instead of System.out

Method Detail

run

public int run(String[] args)
        throws Exception

Get the groups for the users given and print formatted output to the PrintStream configured earlier.

Specified by:

run in interface Tool

Parameters:

args - command specific arguments.

Returns:

exit code.

Throws:

Exception

getProtocolAddress

protected abstract InetSocketAddress getProtocolAddress(Configuration conf)
                                                 throws IOException

Must be overridden by subclasses to get the address where the GetUserMappingsProtocol implementation is running.

Parameters:

conf - The configuration to use.

Returns:

The address where the service is listening.

Throws:

IOException