org.apache.nutch.tools.compat
Class CrawlDbConverter

java.lang.Object
  org.apache.hadoop.conf.Configured
      org.apache.nutch.tools.compat.CrawlDbConverter

All Implemented Interfaces:

Closeable, Configurable, JobConfigurable, Mapper<WritableComparable,CrawlDatum,Text,CrawlDatum>, Tool

public class CrawlDbConverter
extends Configured
implements Tool, Mapper<WritableComparable,CrawlDatum,Text,CrawlDatum>

This tool converts CrawlDb created in old <UTF8, CrawlDatum> format (Nutch versions < 0.9.0) to the new <Text, CrawlDatum> format. Optionally CrawlDatum.metaData can be converted too from using UTF8 keys to using Text keys.

Author:

Andrzej Bialecki

Constructor Summary

CrawlDbConverter()

Method Summary

void	close()
void	configure(JobConf job)
static void	main(String[] args)
void	map(WritableComparable key, CrawlDatum value, OutputCollector<Text,CrawlDatum> output, Reporter reporter)
int	run(String[] args)

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

CrawlDbConverter

public CrawlDbConverter()

Method Detail

configure

public void configure(JobConf job)

Specified by:

configure in interface JobConfigurable

map

public void map(WritableComparable key,
                CrawlDatum value,
                OutputCollector<Text,CrawlDatum> output,
                Reporter reporter)
         throws IOException

Specified by:

map in interface Mapper<WritableComparable,CrawlDatum,Text,CrawlDatum>

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Throws:

IOException

main

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

Parameters:

args -

Throws:

Exception

run

public int run(String[] args)
        throws Exception

Specified by:

run in interface Tool

Throws:

Exception