org.apache.nutch.crawl

Class LinkDb

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.nutch.util.NutchTool

org.apache.nutch.crawl.LinkDb

All Implemented Interfaces:

Configurable, Tool

public class LinkDb
extends NutchTool
implements Tool

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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LinkDb.LinkDbMapper

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CURRENT_NAME
static java.lang.String	IGNORE_EXTERNAL_LINKS
static java.lang.String	IGNORE_INTERNAL_LINKS
static java.lang.String	LOCK_NAME

Fields inherited from class org.apache.nutch.util.NutchTool

currentJob, currentJobNum, numJobs, results, status

Constructor Summary

Constructors

Constructor and Description
LinkDb()
LinkDb(Configuration conf)

Method Summary

Modifier and Type	Method and Description
static void	install(Job 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(java.lang.String[] args)
java.util.Map<java.lang.String,java.lang.Object>	run(java.util.Map<java.lang.String,java.lang.Object> args, java.lang.String crawlId) Runs the tool, using a map of arguments.
int	run(java.lang.String[] args)

Methods inherited from class org.apache.nutch.util.NutchTool

getProgress, getStatus, killJob, stopJob

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

IGNORE_INTERNAL_LINKS

public static final java.lang.String IGNORE_INTERNAL_LINKS

See Also:

Constant Field Values

IGNORE_EXTERNAL_LINKS

public static final java.lang.String IGNORE_EXTERNAL_LINKS

See Also:

Constant Field Values

CURRENT_NAME

public static final java.lang.String CURRENT_NAME

See Also:

Constant Field Values

LOCK_NAME

public static final java.lang.String LOCK_NAME

See Also:

Constant Field Values

Constructor Detail

LinkDb

public LinkDb()

LinkDb

public LinkDb(Configuration conf)

Method Detail

invert

public void invert(Path linkDb,
                   Path segmentsDir,
                   boolean normalize,
                   boolean filter,
                   boolean force)
            throws java.io.IOException,
                   java.lang.InterruptedException,
                   java.lang.ClassNotFoundException

Throws:

java.io.IOException

java.lang.InterruptedException

java.lang.ClassNotFoundException

invert

public void invert(Path linkDb,
                   Path[] segments,
                   boolean normalize,
                   boolean filter,
                   boolean force)
            throws java.io.IOException,
                   java.lang.InterruptedException,
                   java.lang.ClassNotFoundException

Throws:

java.io.IOException

java.lang.InterruptedException

java.lang.ClassNotFoundException

install

public static void install(Job job,
                           Path linkDb)
                    throws java.io.IOException

Throws:

java.io.IOException

main

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

Throws:

java.lang.Exception

run

public int run(java.lang.String[] args)
        throws java.lang.Exception

Specified by:

run in interface Tool

Throws:

java.lang.Exception

run

public java.util.Map<java.lang.String,java.lang.Object> run(java.util.Map<java.lang.String,java.lang.Object> args,
                                                            java.lang.String crawlId)
                                                     throws java.lang.Exception

Description copied from class: NutchTool

Runs the tool, using a map of arguments. May return results, or null.

Specified by:

run in class NutchTool

Throws:

java.lang.Exception