IndexBuilder (Apache HBase 1.4.11 API)

java.lang.Object
- org.apache.hadoop.hbase.mapreduce.IndexBuilder

```
public class IndexBuilder
extends Object
```
Example map/reduce job to construct index tables that can be used to quickly find a row based on the value of a column. It demonstrates:
- Using TableInputFormat and TableMapReduceUtil to use an HTable as input to a map/reduce job.
- Passing values from main method to children via the configuration.
- Using MultiTableOutputFormat to output to multiple tables from a map/reduce job.
- A real use case of building a secondary index over a table.
Usage

Modify ${HADOOP_HOME}/conf/hadoop-env.sh to include the hbase jar, the zookeeper jar (can be found in lib/ directory under HBase root, the examples output directory, and the hbase conf directory in HADOOP_CLASSPATH, and then run bin/hadoop org.apache.hadoop.hbase.mapreduce.IndexBuilder TABLE_NAME COLUMN_FAMILY ATTR [ATTR ...]

To run with the sample data provided in index-builder-setup.rb, use the arguments people attributes name email phone.

This code was written against HBase 0.21 trunk.

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class IndexBuilder.Map
Internal Mapper to be run by Hadoop.

Nested Classes
Modifier and Type	Class and Description
`static class`	`IndexBuilder.Map` Internal Mapper to be run by Hadoop.

Field Summary

Fields
Modifier and Type	Field and Description
`static byte[]`	`INDEX_COLUMN` the column family containing the indexed row key
`static byte[]`	`INDEX_QUALIFIER` the qualifier containing the indexed row key

Constructor Summary

Constructors
Constructor and Description

IndexBuilder()

Constructors
Constructor and Description
`IndexBuilder()`

Method Summary

Methods
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)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- INDEX_COLUMN
```
public static final byte[] INDEX_COLUMN
```
  the column family containing the indexed row key
- INDEX_QUALIFIER
```
public static final byte[] INDEX_QUALIFIER
```
  the qualifier containing the indexed row key

Constructor Detail
- IndexBuilder
```
public IndexBuilder()
```

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

main

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

Throws:: Exception

Class IndexBuilder

Usage

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

INDEX_COLUMN

INDEX_QUALIFIER

Constructor Detail

IndexBuilder

Method Detail

configureJob

main