org.apache.nutch.crawl
Class LinkDb

java.lang.Object
  org.apache.hadoop.conf.Configured
      org.apache.nutch.crawl.LinkDb

All Implemented Interfaces:

Closeable, Configurable, JobConfigurable, Mapper<Text,ParseData,Text,Inlinks>, Tool

public class LinkDb
extends Configured
implements Tool, Mapper<Text,ParseData,Text,Inlinks>

Maintains an inverted link map, listing incoming links for each url.

Field Summary

static String	CURRENT_NAME
static String	LOCK_NAME
static org.slf4j.Logger	LOG

Constructor Summary

LinkDb()

LinkDb(Configuration conf)

Method Summary

void	close()
void	configure(JobConf job)
static void	install(JobConf job, Path linkDb)
void	invert(Path linkDb, Path[] segments, boolean normalize, boolean filter, boolean force)
void	invert(Path linkDb, Path segmentsDir, boolean normalize, boolean filter, boolean force)
static void	main(String[] args)
void	map(Text key, ParseData parseData, OutputCollector<Text,Inlinks> 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

Field Detail

LOG

public static final org.slf4j.Logger LOG

CURRENT_NAME

public static final String CURRENT_NAME

See Also:

Constant Field Values

LOCK_NAME

public static final String LOCK_NAME

See Also:

Constant Field Values

Constructor Detail

LinkDb

public LinkDb()

LinkDb

public LinkDb(Configuration conf)

Method Detail

configure

public void configure(JobConf job)

Specified by:

configure in interface JobConfigurable

close

public void close()

Specified by:

close in interface Closeable

map

public void map(Text key,
                ParseData parseData,
                OutputCollector<Text,Inlinks> output,
                Reporter reporter)
         throws IOException

Specified by:

map in interface Mapper<Text,ParseData,Text,Inlinks>

Throws:

IOException

invert

public void invert(Path linkDb,
                   Path segmentsDir,
                   boolean normalize,
                   boolean filter,
                   boolean force)
            throws IOException

Throws:

IOException

invert

public void invert(Path linkDb,
                   Path[] segments,
                   boolean normalize,
                   boolean filter,
                   boolean force)
            throws IOException

Throws:

IOException

install

public static void install(JobConf job,
                           Path linkDb)
                    throws IOException

Throws:

IOException

main

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

Throws:

Exception

run

public int run(String[] args)
        throws Exception

Specified by:

run in interface Tool

Throws:

Exception