Package org.apache.hadoop.tools.dynamometer.workloadgenerator

Class WorkloadMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

org.apache.hadoop.tools.dynamometer.workloadgenerator.WorkloadMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

Direct Known Subclasses:

AuditReplayMapper, CreateFileMapper

public abstract class WorkloadMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
extends org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

Represents the base class for a generic workload-generating mapper. By default, it will expect to use VirtualInputFormat as its InputFormat. Subclasses requiring a reducer or expecting a different InputFormat should override the configureJob(Job) method.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

Constructors

Constructor	Description
WorkloadMapper()

Method Summary

Modifier and Type	Method	Description
void	configureJob(org.apache.hadoop.mapreduce.Job job)	Setup input and output formats and optional reducer.
abstract java.util.List<java.lang.String>	getConfigDescriptions()	Get a list of the description of each configuration that this mapper accepts.
abstract java.lang.String	getDescription()	Get the description of the behavior of this mapper.
abstract boolean	verifyConfigurations(org.apache.hadoop.conf.Configuration conf)	Verify that the provided configuration contains all configurations required by this mapper.

Methods inherited from class org.apache.hadoop.mapreduce.Mapper

cleanup, map, run, setup

Methods inherited from class java.lang.Object

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

Constructor Detail

WorkloadMapper

public WorkloadMapper()

Method Detail

getDescription

public abstract java.lang.String getDescription()

Get the description of the behavior of this mapper.

Returns:

description string.

getConfigDescriptions

public abstract java.util.List<java.lang.String> getConfigDescriptions()

Get a list of the description of each configuration that this mapper accepts.

Returns:

list of the description of each configuration.

verifyConfigurations

public abstract boolean verifyConfigurations(org.apache.hadoop.conf.Configuration conf)

Verify that the provided configuration contains all configurations required by this mapper.

Parameters:

conf - configuration.

Returns:

whether or not all configurations required are provided.

configureJob

public void configureJob(org.apache.hadoop.mapreduce.Job job)

Setup input and output formats and optional reducer.