Package org.apache.nutch.indexwriter.dummy

Class DummyIndexWriter

java.lang.Object

org.apache.nutch.indexwriter.dummy.DummyIndexWriter

All Implemented Interfaces:

Configurable, IndexWriter, Pluggable

public class DummyIndexWriter
extends Object
implements IndexWriter

DummyIndexWriter. This pluggable indexer writes <action>\t<url>\n lines to a plain text file for debugging purposes. Possible actions are delete, update and add.

Field Summary

Fields inherited from interface org.apache.nutch.indexer.IndexWriter

X_POINT_ID

Constructor Summary

Constructors

Constructor	Description
DummyIndexWriter()

Method Summary

Modifier and Type	Method	Description
void	close()
void	commit()
void	delete(String key)
Map<String,Map.Entry<String,Object>>	describe()	Returns Map with the specific parameters the IndexWriter instance can take.
Configuration	getConf()
void	open(Configuration conf, String name)
void	open(IndexWriterParams parameters)	Initializes the internal variables from a given index writer configuration.
void	setConf(Configuration conf)
void	update(NutchDocument doc)
void	write(NutchDocument doc)

Methods inherited from class java.lang.Object

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

Constructor Details

DummyIndexWriter

public DummyIndexWriter()

Method Details

open

public void open(Configuration conf,
 String name)
          throws IOException

Specified by:

open in interface IndexWriter

Parameters:

conf - Nutch configuration

name - target name of the IndexWriter to be opened

Throws:

IOException - Some exception thrown by some writer.

open

public void open(IndexWriterParams parameters)
          throws IOException

Initializes the internal variables from a given index writer configuration.

Specified by:

open in interface IndexWriter

Parameters:

parameters - Params from the index writer configuration.

Throws:

IOException - Some exception thrown by writer.

delete

public void delete(String key)
            throws IOException

Specified by:

delete in interface IndexWriter

Throws:

IOException

update

public void update(NutchDocument doc)
            throws IOException

Specified by:

update in interface IndexWriter

Throws:

IOException

write

public void write(NutchDocument doc)
           throws IOException

Specified by:

write in interface IndexWriter

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface IndexWriter

Throws:

IOException

commit

public void commit()
            throws IOException

Specified by:

commit in interface IndexWriter

Throws:

IOException

getConf

public Configuration getConf()

Specified by:

getConf in interface Configurable

setConf

public void setConf(Configuration conf)

Specified by:

setConf in interface Configurable

describe

public Map<String,Map.Entry<String,Object>> describe()

Returns Map with the specific parameters the IndexWriter instance can take.

Specified by:

describe in interface IndexWriter

Returns:

The values of each row. It must have the form <KEY,<DESCRIPTION,VALUE>>.