[TOC]

org.apache.nutch.segment

Class SegmentReader

  • java.lang.Object
    • org.apache.hadoop.conf.Configured
    • org.apache.nutch.segment.SegmentReader
    • All Implemented Interfaces:
    • Closeable, AutoCloseable, org.apache.hadoop.conf.Configurable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Reducer 
public class SegmentReader
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.Text,NutchWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Dump the content of a segment.

Nested Class Summary

Nested Classes Modifier and Type Class and Description static class SegmentReader.InputCompatMapper static class SegmentReader.SegmentReaderStats static class SegmentReader.TextOutputFormat Implements a text output format

Field Summary

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

Constructor Summary

Constructors Constructor and Description SegmentReader() SegmentReader(org.apache.hadoop.conf.Configuration conf, boolean co, boolean fe, boolean ge, boolean pa, boolean pd, boolean pt)

Method Summary

Methods Modifier and Type Method and Description void close() void configure(org.apache.hadoop.mapred.JobConf job) void dump(org.apache.hadoop.fs.Path segment, org.apache.hadoop.fs.Path output) void get(org.apache.hadoop.fs.Path segment, org.apache.hadoop.io.Text key, Writer writer, Map> results) void getStats(org.apache.hadoop.fs.Path segment, SegmentReader.SegmentReaderStats stats) void list(List dirs, Writer writer) static void main(String[] args) void reduce(org.apache.hadoop.io.Text key, Iterator values, org.apache.hadoop.mapred.OutputCollector output, org.apache.hadoop.mapred.Reporter reporter) 

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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

Field Detail

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LOG

public static final org.slf4j.Logger LOG

Constructor Detail

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SegmentReader

public SegmentReader()
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SegmentReader

public SegmentReader(org.apache.hadoop.conf.Configuration conf,
             boolean co,
             boolean fe,
             boolean ge,
             boolean pa,
             boolean pd,
             boolean pt)

Method Detail

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configure

public void configure(org.apache.hadoop.mapred.JobConf job)
  - 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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reduce

public void reduce(org.apache.hadoop.io.Text key,
          Iterator<NutchWritable> values,
          org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text> output,
          org.apache.hadoop.mapred.Reporter reporter)
            throws IOException
  - Specified by: 
  - <code>reduce</code> in interface <code>org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.text,nutchwritable,org.apache.hadoop.io.text,org.apache.hadoop.io.text></org.apache.hadoop.io.text,nutchwritable,org.apache.hadoop.io.text,org.apache.hadoop.io.text></code> 
  - Throws: 
  - <code>IOException</code>       
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dump

public void dump(org.apache.hadoop.fs.Path segment,
        org.apache.hadoop.fs.Path output)
          throws IOException
  - Throws: 
  - <code>IOException</code>       
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get

public void get(org.apache.hadoop.fs.Path segment,
       org.apache.hadoop.io.Text key,
       Writer writer,
       Map<String,List<org.apache.hadoop.io.Writable>> results)
         throws Exception
  - Throws: 
  - <code>Exception</code>       
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list

public void list(List<org.apache.hadoop.fs.Path> dirs,
        Writer writer)
          throws Exception
  - Throws: 
  - <code>Exception</code>       
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getStats

public void getStats(org.apache.hadoop.fs.Path segment,
            SegmentReader.SegmentReaderStats stats)
              throws Exception
  - Throws: 
  - <code>Exception</code>       
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main

public static void main(String[] args)
                 throws Exception
  - Throws: 
  - <code>Exception</code>

Copyright © 2014 The Apache Software Foundation