com.asakusafw.runtime.stage.preparator

Class PreparatorMapper<T>

java.lang.Object

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

com.asakusafw.runtime.flow.MapperWithRuntimeResource<Object,T,Object,T>

com.asakusafw.runtime.stage.preparator.PreparatorMapper<T>

Type Parameters:

T - the input/output data model type

public abstract class PreparatorMapper<T>
extends MapperWithRuntimeResource<Object,T,Object,T>

The skeletal implementation to output values directly.

Since:

0.2.5

Version:

0.5.1

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME_GET_OUTPUT_NAME The method name of getOutputName().

Constructor Summary

Constructors

Constructor and Description
PreparatorMapper()

Method Summary

Modifier and Type	Method and Description
protected void	cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
abstract String	getOutputName() Returns the output name.
protected void	map(Object key, T value, org.apache.hadoop.mapreduce.Mapper.Context context)
protected void	setup(org.apache.hadoop.mapreduce.Mapper.Context context)

Methods inherited from class com.asakusafw.runtime.flow.MapperWithRuntimeResource

run, runInternal

Methods inherited from class java.lang.Object

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

Field Detail

NAME_GET_OUTPUT_NAME

public static final String NAME_GET_OUTPUT_NAME

The method name of getOutputName().

See Also:

Constant Field Values

Constructor Detail

PreparatorMapper

public PreparatorMapper()

Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
              throws IOException,
                     InterruptedException

Overrides:

setup in class org.apache.hadoop.mapreduce.Mapper<Object,T,Object,T>

Throws:

IOException

InterruptedException

getOutputName

public abstract String getOutputName()

Returns the output name.

Returns:

the output name.

cleanup

protected void cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
                throws IOException,
                       InterruptedException

Overrides:

cleanup in class org.apache.hadoop.mapreduce.Mapper<Object,T,Object,T>

Throws:

IOException

InterruptedException

map

protected void map(Object key,
                   T value,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<Object,T,Object,T>

Throws:

IOException

InterruptedException