org.apache.nutch.scoring.webgraph

Class LinkRank

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.nutch.scoring.webgraph.LinkRank

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

public class LinkRank
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.Tool

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
LinkRank() Default constructor.
LinkRank(org.apache.hadoop.conf.Configuration conf) Configurable constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	analyze(org.apache.hadoop.fs.Path webGraphDb) Runs the complete link analysis job.
void	close()
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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

LinkRank

public LinkRank()

Default constructor.

LinkRank

public LinkRank(org.apache.hadoop.conf.Configuration conf)

Configurable constructor.

Method Detail

close

public void close()

analyze

public void analyze(org.apache.hadoop.fs.Path webGraphDb)
             throws IOException

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 an error occurs during link analysis.

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 org.apache.hadoop.util.Tool

Throws:

Exception