WALPlayer (Apache HBase 1.4.11 API)

All Classes

Summary:
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Field |
Constr |
Method

Detail:
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Constr |
Method

java.lang.Object
- org.apache.hadoop.conf.Configured
- - org.apache.hadoop.hbase.mapreduce.WALPlayer

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool
```
@InterfaceAudience.Public
@InterfaceStability.Stable
public class WALPlayer
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.Tool
```
A tool to replay WAL files as a M/R job. The WAL can be replayed for a set of tables or all tables, and a timerange can be provided (in milliseconds). The WAL is filtered to the passed set of tables and the output can optionally be mapped to another set of tables. WAL replay can also generate HFiles for later bulk importing, in that case the WAL is replayed for a single table only.

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

protected static class WALPlayer.WALMapper
A mapper that writes out Mutation to be directly applied to a running HBase instance.

Constructor Summary

Constructors
Constructor and Description

WALPlayer(org.apache.hadoop.conf.Configuration conf)

Method Summary

Methods
Modifier and Type	Method and Description
`org.apache.hadoop.mapreduce.Job`	`createSubmittableJob(String[] args)` Sets up the actual job.
`static void`	`main(String[] args)` Main entry point.
`int`	`run(String[] args)`

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
  - WALPlayer
```
public WALPlayer(org.apache.hadoop.conf.Configuration conf)
```
    Parameters:
    conf - The Configuration to use.
- Method Detail
  - createSubmittableJob
```
public org.apache.hadoop.mapreduce.Job createSubmittableJob(String[] args)
                                                     throws IOException
```
    Sets up the actual job.
    
    Parameters:
    args - The command line parameters.
    
    Returns:
    The newly created job.
    
    Throws:
    
    IOException - When setting up the job fails.
  - main
```
public static void main(String[] args)
                 throws Exception
```
    Main entry point.
    
    Parameters:
    args - The command line parameters.
    
    Throws:
    
    Exception - When running the job fails.
  - run
```
public int run(String[] args)
        throws Exception
```
    Specified by:
    
    run in interface org.apache.hadoop.util.Tool
    
    Throws:
    
    Exception

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