Package org.apache.nutch.scoring.webgraph

Class LinkRank

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.nutch.scoring.webgraph.LinkRank

All Implemented Interfaces:

Configurable, Tool

public class LinkRank
extends Configured
implements Tool

Constructor Summary

Constructors

Constructor	Description
LinkRank()	Default constructor.
LinkRank(Configuration conf)	Configurable constructor.

Method Summary

Modifier and Type	Method	Description
void	analyze(Path webGraphDb)	Runs the complete link analysis job.
static void	main(String[] args)
int	run(String[] args)	Runs the LinkRank tool.

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Constructor Detail

LinkRank

public LinkRank()

Default constructor.

LinkRank

public LinkRank(Configuration conf)

Configurable constructor.

Parameters:

conf - a populated Configuration

Method Detail

analyze

public void analyze(Path webGraphDb)
             throws IOException,
                    ClassNotFoundException,
                    InterruptedException

Runs the complete link analysis job. The complete job determins rank one score. Then runs through a given number of invert and analyze iterations, by default 10. And finally replaces the NodeDb in the WebGraph with the link rank output.

Parameters:

webGraphDb - The WebGraph to run link analysis on.

Throws:

IOException - If a fatal I/O runtime error occurs during link analysis.

InterruptedException - if the Job is interrupted during execution

ClassNotFoundException - if classes required to run the Job cannot be located

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception

run

public int run(String[] args)
        throws Exception

Runs the LinkRank tool.

Specified by:

run in interface Tool

Throws:

Exception