org.apache.nutch.scoring.webgraph

Class LinkDumper.Inverter

java.lang.Object

org.apache.nutch.scoring.webgraph.LinkDumper.Inverter

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, JobConfigurable, Mapper<Text,Writable,Text,ObjectWritable>, Reducer<Text,ObjectWritable,Text,LinkDumper.LinkNode>

Enclosing class:

LinkDumper

public static class LinkDumper.Inverter
extends java.lang.Object
implements Mapper<Text,Writable,Text,ObjectWritable>, Reducer<Text,ObjectWritable,Text,LinkDumper.LinkNode>

Inverts outlinks from the WebGraph to inlinks and attaches node information.

Constructor Summary

Constructors

Constructor and Description
Inverter()

Method Summary

Modifier and Type	Method and Description
void	close()
void	configure(JobConf conf)
void	map(Text key, Writable value, OutputCollector<Text,ObjectWritable> output, Reporter reporter) Wraps all values in ObjectWritables.
void	reduce(Text key, java.util.Iterator<ObjectWritable> values, OutputCollector<Text,LinkDumper.LinkNode> output, Reporter reporter) Inverts outlinks to inlinks while attaching node information to the outlink.

Methods inherited from class java.lang.Object

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

Constructor Detail

Inverter

public Inverter()

Method Detail

configure

public void configure(JobConf conf)

Specified by:

configure in interface JobConfigurable

map

public void map(Text key,
                Writable value,
                OutputCollector<Text,ObjectWritable> output,
                Reporter reporter)
         throws java.io.IOException

Wraps all values in ObjectWritables.

Specified by:

map in interface Mapper<Text,Writable,Text,ObjectWritable>

Throws:

java.io.IOException

reduce

public void reduce(Text key,
                   java.util.Iterator<ObjectWritable> values,
                   OutputCollector<Text,LinkDumper.LinkNode> output,
                   Reporter reporter)
            throws java.io.IOException

Inverts outlinks to inlinks while attaching node information to the outlink.

Specified by:

reduce in interface Reducer<Text,ObjectWritable,Text,LinkDumper.LinkNode>

Throws:

java.io.IOException

close

public void close()

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable