Package org.apache.nutch.scoring.webgraph

Class ScoreUpdater

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.nutch.scoring.webgraph.ScoreUpdater

All Implemented Interfaces:

Configurable, Tool

public class ScoreUpdater
extends Configured
implements Tool

Updates the score from the WebGraph node database into the crawl database. Any score that is not in the node database is set to the clear score in the crawl database.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ScoreUpdater.ScoreUpdaterMapper	Changes input into ObjectWritables.
static class	ScoreUpdater.ScoreUpdaterReducer	Creates new CrawlDatum objects with the updated score from the NodeDb or with a cleared score.

Constructor Summary

Constructors

Constructor	Description
ScoreUpdater()

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)
int	run(String[] args)	Runs the ScoreUpdater tool.
void	update(Path crawlDb, Path webGraphDb)	Updates the inlink score in the web graph node databsae into the crawl database.

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 Details

ScoreUpdater

public ScoreUpdater()

Method Details

update

public void update(Path crawlDb,
 Path webGraphDb)
            throws IOException,
ClassNotFoundException,
InterruptedException

Updates the inlink score in the web graph node databsae into the crawl database.

Parameters:

crawlDb - The crawl database to update

webGraphDb - The webgraph database to use.

Throws:

IOException - If an error occurs while updating the scores.

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 ScoreUpdater tool.

Specified by:

run in interface Tool

Throws:

Exception