[TOC]

org.apache.nutch.scoring.webgraph

Class NodeDumper.Dumper

  • java.lang.Object
    • org.apache.hadoop.conf.Configured
    • org.apache.nutch.scoring.webgraph.NodeDumper.Dumper
    • All Implemented Interfaces:
    • Closeable, AutoCloseable, org.apache.hadoop.conf.Configurable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Mapper, org.apache.hadoop.mapred.Reducer
    • Enclosing class:
    • NodeDumper 
public static class NodeDumper.Dumper
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.Text,Node,org.apache.hadoop.io.Text,org.apache.hadoop.io.FloatWritable>, org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.FloatWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.FloatWritable>

Outputs the hosts or domains with an associated value. This value consists of either the number of inlinks, the number of outlinks or the score. The computed value is then either the sum of all parts or the top value.

Constructor Summary

Constructors Constructor and Description NodeDumper.Dumper()

Method Summary

Methods Modifier and Type Method and Description void close() void configure(org.apache.hadoop.mapred.JobConf conf) void map(org.apache.hadoop.io.Text key, Node node, org.apache.hadoop.mapred.OutputCollector output, org.apache.hadoop.mapred.Reporter reporter) Outputs the host or domain as key for this record and numInlinks, numOutlinks or score as the value. void reduce(org.apache.hadoop.io.Text key, Iterator values, org.apache.hadoop.mapred.OutputCollector output, org.apache.hadoop.mapred.Reporter reporter) Outputs either the sum or the top value for this record.

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

getConf, setConf 

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Methods inherited from class java.lang.Object

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

Constructor Detail

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NodeDumper.Dumper

public NodeDumper.Dumper()

Method Detail

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configure

public void configure(org.apache.hadoop.mapred.JobConf conf)
  - Specified by: 
  - <code>configure</code> in interface <code>org.apache.hadoop.mapred.JobConfigurable</code>        
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close

public void close()
  - Specified by: 
  - <code>close</code> in interface <code>Closeable</code> 
  - Specified by: 
  - <code>close</code> in interface <code>AutoCloseable</code>        
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map

public void map(org.apache.hadoop.io.Text key,
       Node node,
       org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.Text,org.apache.hadoop.io.FloatWritable> output,
       org.apache.hadoop.mapred.Reporter reporter)
         throws IOException

Outputs the host or domain as key for this record and numInlinks, numOutlinks or score as the value.

  - Specified by: 
  - <code>map</code> in interface <code>org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.text,node,org.apache.hadoop.io.text,org.apache.hadoop.io.floatwritable></org.apache.hadoop.io.text,node,org.apache.hadoop.io.text,org.apache.hadoop.io.floatwritable></code> 
  - Throws: 
  - <code>IOException</code>       
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reduce

public void reduce(org.apache.hadoop.io.Text key,
          Iterator<org.apache.hadoop.io.FloatWritable> values,
          org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.Text,org.apache.hadoop.io.FloatWritable> output,
          org.apache.hadoop.mapred.Reporter reporter)
            throws IOException

Outputs either the sum or the top value for this record.

  - Specified by: 
  - <code>reduce</code> in interface <code>org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.text,org.apache.hadoop.io.floatwritable,org.apache.hadoop.io.text,org.apache.hadoop.io.floatwritable></org.apache.hadoop.io.text,org.apache.hadoop.io.floatwritable,org.apache.hadoop.io.text,org.apache.hadoop.io.floatwritable></code> 
  - Throws: 
  - <code>IOException</code>

Copyright © 2014 The Apache Software Foundation