org.apache.hadoop.hbase.mapreduce

Class SampleUploader

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.hbase.mapreduce.SampleUploader

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

@InterfaceAudience.Private
public class SampleUploader
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.Tool

Sample Uploader MapReduce

This is EXAMPLE code. You will need to change it to work for your context.

Uses TableReducer to put the data into HBase. Change the InputFormat to suit your data. In this example, we are importing a CSV file.

 row,family,qualifier,value
 

The table and columnfamily we're to insert into must preexist.

There is no reducer in this example as it is not necessary and adds significant overhead. If you need to do any massaging of data before inserting into HBase, you can do this in the map as well.

Do the following to start the MR job:

 ./bin/hadoop org.apache.hadoop.hbase.mapreduce.SampleUploader /tmp/input.csv TABLE_NAME
 

This code was written against HBase 0.21 trunk.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) static class	SampleUploader.Uploader

Field Summary

Fields

Modifier and Type	Field and Description
private static String	NAME

Constructor Summary

Constructors

Constructor and Description
SampleUploader()

Method Summary

Modifier and Type	Method and Description
static org.apache.hadoop.mapreduce.Job	configureJob(org.apache.hadoop.conf.Configuration conf, String[] args) Job configuration.
static void	main(String[] args)
int	run(String[] otherArgs) Main entry point.

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

Field Detail

NAME

private static final String NAME

See Also:

Constant Field Values

Constructor Detail

SampleUploader

public SampleUploader()

Method Detail

configureJob

public static org.apache.hadoop.mapreduce.Job configureJob(org.apache.hadoop.conf.Configuration conf,
                                                           String[] args)
                                                    throws IOException

Job configuration.

Throws:

IOException

run

public int run(String[] otherArgs)
        throws Exception

Main entry point.

Specified by:

run in interface org.apache.hadoop.util.Tool

Parameters:

otherArgs - The command line parameters after ToolRunner handles standard.

Throws:

Exception - When running the job fails.

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception