Package org.apache.nutch.tools.warc

Class WARCExporter.WARCMapReduce.WARCReducer

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<Text,NutchWritable,NullWritable,com.martinkl.warc.WARCWritable>

org.apache.nutch.tools.warc.WARCExporter.WARCMapReduce.WARCReducer

Enclosing class:

WARCExporter.WARCMapReduce

public static class WARCExporter.WARCMapReduce.WARCReducer
extends Reducer<Text,NutchWritable,NullWritable,com.martinkl.warc.WARCWritable>

Nested Class Summary

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

Reducer.Context

Constructor Summary

Constructors

Constructor	Description
WARCReducer()

Method Summary

Modifier and Type	Method	Description
protected com.google.gson.JsonObject	metadataToJson(Metadata meta)	Adds keys/values of a Nuta metadata container to a JsonObject.
void	reduce(Text key, Iterable<NutchWritable> values, Reducer<Text,NutchWritable,NullWritable,com.martinkl.warc.WARCWritable>.Context context)
void	setup(Reducer<Text,NutchWritable,NullWritable,com.martinkl.warc.WARCWritable>.Context context)

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

cleanup, run

Methods inherited from class java.lang.Object

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

Constructor Details

WARCReducer

public WARCReducer()

Method Details

setup

public void setup(Reducer<Text,NutchWritable,NullWritable,com.martinkl.warc.WARCWritable>.Context context)

Overrides:

setup in class Reducer<Text,NutchWritable,NullWritable,com.martinkl.warc.WARCWritable>

reduce

public void reduce(Text key,
 Iterable<NutchWritable> values,
 Reducer<Text,NutchWritable,NullWritable,com.martinkl.warc.WARCWritable>.Context context)
            throws IOException,
InterruptedException

Overrides:

reduce in class Reducer<Text,NutchWritable,NullWritable,com.martinkl.warc.WARCWritable>

Throws:

IOException

InterruptedException

metadataToJson

protected com.google.gson.JsonObject metadataToJson(Metadata meta)

Adds keys/values of a Nuta metadata container to a JsonObject.

Parameters:

meta - Nutch metadata container

Returns:

json object