Package org.apache.nutch.indexer

Interface IndexWriter

All Superinterfaces:

Configurable, Pluggable

All Known Implementing Classes:

CloudSearchIndexWriter, CSVIndexWriter, DummyIndexWriter, ElasticIndexWriter, KafkaIndexWriter, OpenSearch1xIndexWriter, RabbitIndexWriter, SolrIndexWriter

public interface IndexWriter
extends Pluggable, Configurable

Field Summary

Fields

Modifier and Type	Field	Description
static final String	X_POINT_ID	The name of the extension point.

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.
void	open(Configuration conf, String name)	Deprecated. use open(IndexWriterParams)} instead.
void	open(IndexWriterParams parameters)	Initializes the internal variables from a given index writer configuration.
void	update(NutchDocument doc)
void	write(NutchDocument doc)

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Field Details

X_POINT_ID

static final String X_POINT_ID

The name of the extension point.

Method Details

open

@Deprecated
void open(Configuration conf,
 String name)
   throws IOException

Deprecated.

use open(IndexWriterParams)} instead.

Parameters:

conf - Nutch configuration

name - target name of the IndexWriter to be opened

Throws:

IOException - Some exception thrown by some writer.

open

void open(IndexWriterParams parameters)
   throws IOException

Initializes the internal variables from a given index writer configuration.

Parameters:

parameters - Params from the index writer configuration.

Throws:

IOException - Some exception thrown by writer.

write

void write(NutchDocument doc)
    throws IOException

Throws:

IOException

delete

void delete(String key)
     throws IOException

Throws:

IOException

update

void update(NutchDocument doc)
     throws IOException

Throws:

IOException

commit

void commit()
     throws IOException

Throws:

IOException

close

void close()
    throws IOException

Throws:

IOException

describe

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

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

Returns:

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