Package org.apache.nutch.scoring.webgraph

Class NodeDumper

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.nutch.scoring.webgraph.NodeDumper

All Implemented Interfaces:

Configurable, Tool

public class NodeDumper
extends Configured
implements Tool

A tools that dumps out the top urls by number of inlinks, number of outlinks, or by score, to a text file. One of the major uses of this tool is to check the top scoring urls of a link analysis program such as LinkRank. For number of inlinks or number of outlinks the WebGraph program will need to have been run. For link analysis score a program such as LinkRank will need to have been run which updates the NodeDb of the WebGraph.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NodeDumper.Dumper	Outputs the hosts or domains with an associated value.
static class	NodeDumper.Sorter	Outputs the top urls sorted in descending order.

Constructor Summary

Constructors

Constructor	Description
NodeDumper()

Method Summary

Modifier and Type	Method	Description
void	dumpNodes(Path webGraphDb, org.apache.nutch.scoring.webgraph.NodeDumper.DumpType type, long topN, Path output, boolean asEff, org.apache.nutch.scoring.webgraph.NodeDumper.NameType nameType, org.apache.nutch.scoring.webgraph.NodeDumper.AggrType aggrType, boolean asSequenceFile)	Runs the process to dump the top urls out to a text file.
static void	main(String[] args)
int	run(String[] args)	Runs the node dumper 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

NodeDumper

public NodeDumper()

Method Detail

dumpNodes

public void dumpNodes(Path webGraphDb,
                      org.apache.nutch.scoring.webgraph.NodeDumper.DumpType type,
                      long topN,
                      Path output,
                      boolean asEff,
                      org.apache.nutch.scoring.webgraph.NodeDumper.NameType nameType,
                      org.apache.nutch.scoring.webgraph.NodeDumper.AggrType aggrType,
                      boolean asSequenceFile)
               throws Exception

Runs the process to dump the top urls out to a text file.

Parameters:

webGraphDb - The WebGraph from which to pull values.

type - the node property type to dump, one of NodeDumper.DumpType.INLINKS, NodeDumper.DumpType.OUTLINKS or NodeDumper.DumpType.SCORES

topN - maximum value of top links to dump

output - a Path to write output to

asEff - if true set equals-sign as separator for Solr's ExternalFileField, false otherwise

nameType - either NodeDumper.NameType.HOST or NodeDumper.NameType.DOMAIN

aggrType - the aggregation type, either NodeDumper.AggrType.MAX or NodeDumper.AggrType.SUM

asSequenceFile - true output will be written as SequenceFileOutputFormat, otherwise default TextOutputFormat

Throws:

Exception - If an error occurs while dumping the top values.

main

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

Throws:

Exception

run

public int run(String[] args)
        throws Exception

Runs the node dumper tool.

Specified by:

run in interface Tool

Throws:

Exception