Package org.apache.nutch.scoring.webgraph

Class LinkDumper.Merger

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<Text,LinkDumper.LinkNode,Text,LinkDumper.LinkNodes>

org.apache.nutch.scoring.webgraph.LinkDumper.Merger

Enclosing class:

LinkDumper

public static class LinkDumper.Merger
extends Reducer<Text,LinkDumper.LinkNode,Text,LinkDumper.LinkNodes>

Merges LinkNode objects into a single array value per url. This allows all values to be quickly retrieved and printed via the Reader tool.

Nested Class Summary

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

Reducer.Context

Constructor Summary

Constructors

Constructor	Description
Merger()

Method Summary

Modifier and Type	Method	Description
void	reduce(Text key, Iterable<LinkDumper.LinkNode> values, Reducer.Context context)	Aggregate all LinkNode objects for a given url.

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

cleanup, run, setup

Methods inherited from class java.lang.Object

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

Constructor Detail

Merger

public Merger()

Method Detail

reduce

public void reduce(Text key,
                   Iterable<LinkDumper.LinkNode> values,
                   Reducer.Context context)
            throws IOException,
                   InterruptedException

Aggregate all LinkNode objects for a given url.

Overrides:

reduce in class Reducer<Text,LinkDumper.LinkNode,Text,LinkDumper.LinkNodes>

Throws:

IOException

InterruptedException