Uses of Interface
org.apache.nutch.io.WritableComparable

Packages that use WritableComparable

org.apache.nutch.db	Web database: tracks page fetches and link structure.
org.apache.nutch.indexer	Maintain Lucene full-text indexes.
org.apache.nutch.io	Generic i/o code for use when reading and writing data to the network, to databases, and to files.
org.apache.nutch.mapReduce	A system for scalable, fault-tolerant, distributed computation over large data collections.
org.apache.nutch.mapReduce.lib	Library of generally useful mappers, reducers, and partitioners.
org.apache.nutch.searcher	Search API
org.apache.nutch.tools

Uses of WritableComparable in org.apache.nutch.db

Classes in org.apache.nutch.db that implement WritableComparable

static class	DistributedWebDBWriter.LinkInstruction Holds an instruction over a Link.
static class	DistributedWebDBWriter.PageInstruction PageInstruction holds an operation over a Page.
class	Link This is the field in the Link Database.
class	Page A row in the Page Database.
static class	WebDBWriter.LinkInstruction Holds an instruction over a Link.
static class	WebDBWriter.PageInstruction PageInstruction holds an operation over a Page.

Methods in org.apache.nutch.db that return WritableComparable

abstract WritableComparable	EditSectionGroupWriter.KeyExtractor.extractInnerKey(WritableComparable key)
WritableComparable	EditSectionGroupWriter.PageURLExtractor.extractInnerKey(WritableComparable key)
WritableComparable	EditSectionGroupWriter.PageMD5Extractor.extractInnerKey(WritableComparable key)
WritableComparable	EditSectionGroupWriter.LinkURLExtractor.extractInnerKey(WritableComparable key)
WritableComparable	EditSectionGroupWriter.LinkMD5Extractor.extractInnerKey(WritableComparable key)

Methods in org.apache.nutch.db with parameters of type WritableComparable

void	EditSectionGroupWriter.append(WritableComparable key, Writable val) Add an instruction and append it.
abstract WritableComparable	EditSectionGroupWriter.KeyExtractor.extractInnerKey(WritableComparable key)
WritableComparable	EditSectionGroupWriter.PageURLExtractor.extractInnerKey(WritableComparable key)
WritableComparable	EditSectionGroupWriter.PageMD5Extractor.extractInnerKey(WritableComparable key)
WritableComparable	EditSectionGroupWriter.LinkURLExtractor.extractInnerKey(WritableComparable key)
WritableComparable	EditSectionGroupWriter.LinkMD5Extractor.extractInnerKey(WritableComparable key)
int	DistributedWebDBWriter.LinkInstruction.UrlComparator.compare(WritableComparable a, WritableComparable b)
int	WebDBWriter.PageInstruction.UrlComparator.compare(WritableComparable a, WritableComparable b) We need to sort by ordered URLs.
int	WebDBWriter.LinkInstruction.MD5Comparator.compare(WritableComparable a, WritableComparable b)
int	WebDBWriter.LinkInstruction.UrlComparator.compare(WritableComparable a, WritableComparable b)
int	Link.MD5Comparator.compare(WritableComparable a, WritableComparable b)
int	DistributedWebDBWriter.LinkInstruction.MD5Comparator.compare(WritableComparable a, WritableComparable b)
int	Link.UrlComparator.compare(WritableComparable a, WritableComparable b)
int	DistributedWebDBWriter.PageInstruction.UrlComparator.compare(WritableComparable a, WritableComparable b) We need to sort by ordered URLs.
void	EditSectionWriter.append(WritableComparable key, Writable val) Add a key/val pair
int	Page.UrlComparator.compare(WritableComparable a, WritableComparable b)

Uses of WritableComparable in org.apache.nutch.indexer

Classes in org.apache.nutch.indexer that implement WritableComparable

static class

DeleteDuplicates.IndexedDoc The key used in sorting for duplicates.

Uses of WritableComparable in org.apache.nutch.io

Classes in org.apache.nutch.io that implement WritableComparable

class	BooleanWritable A WritableComparable for booleans.
class	FloatWritable A WritableComparable for floats.
class	IntWritable A WritableComparable for ints.
class	LongWritable A WritableComparable for longs.
class	MD5Hash A Writable for MD5 hash values.
class	UTF8 A WritableComparable for strings that uses the UTF8 encoding.

Methods in org.apache.nutch.io that return WritableComparable

WritableComparable	WritableComparator.newKey() Construct a new WritableComparable instance.
WritableComparable	SetFile.Reader.get(WritableComparable key) Read the matching key from a set into key.

Methods in org.apache.nutch.io with parameters of type WritableComparable

int	LongWritable.DecreasingComparator.compare(WritableComparable a, WritableComparable b)
void	MapFile.Writer.append(WritableComparable key, Writable val) Append a key/value pair to the map.
void	MapFile.Reader.finalKey(WritableComparable key) Reads the final key from the file.
boolean	MapFile.Reader.seek(WritableComparable key) Positions the reader at the named key, or if none such exists, at the first entry after the named key.
boolean	MapFile.Reader.next(WritableComparable key, Writable val) Read the next key/value pair in the map into key and val.
Writable	MapFile.Reader.get(WritableComparable key, Writable val) Return the value for the named key, or null if none exists.
void	SetFile.Writer.append(WritableComparable key) Append a key to a set.
int	WritableComparator.compare(WritableComparable a, WritableComparable b) Compare two WritableComparables.
boolean	SetFile.Reader.seek(WritableComparable key)
boolean	SetFile.Reader.next(WritableComparable key) Read the next key in a set into key.
WritableComparable	SetFile.Reader.get(WritableComparable key) Read the matching key from a set into key.

Uses of WritableComparable in org.apache.nutch.mapReduce

Methods in org.apache.nutch.mapReduce with parameters of type WritableComparable

int	Partitioner.getPartition(WritableComparable key, int numPartitions) Returns the paritition number for a given key given the total number of partitions.
void	Reducer.reduce(WritableComparable key, Iterator values, OutputCollector output) Combines values for a given key.
void	Mapper.map(WritableComparable key, Writable value, OutputCollector output) Maps a single input key/value pair into intermediate key/value pairs.
void	RecordWriter.write(WritableComparable key, Writable value) Writes a key/value pair.
void	OutputCollector.collect(WritableComparable key, Writable value) Adds a key/value pair to the output.

Uses of WritableComparable in org.apache.nutch.mapReduce.lib

Methods in org.apache.nutch.mapReduce.lib with parameters of type WritableComparable

void	IdentityReducer.reduce(WritableComparable key, Iterator values, OutputCollector output) Writes all keys and values directly to output.
int	HashPartitioner.getPartition(WritableComparable key, int numReduceTasks) Use Object.hashCode() to partition.
void	IdentityMapper.map(WritableComparable key, Writable val, OutputCollector output) The identify function.
void	LongSumReducer.reduce(WritableComparable key, Iterator values, OutputCollector output)
void	InverseMapper.map(WritableComparable key, Writable value, OutputCollector output) The inverse function.
void	RegexMapper.map(WritableComparable key, Writable value, OutputCollector output)
void	TokenCountMapper.map(WritableComparable key, Writable value, OutputCollector output)

Uses of WritableComparable in org.apache.nutch.searcher

Methods in org.apache.nutch.searcher that return WritableComparable

WritableComparable

Hit.getSortValue() Return the value of the field that hits are sorted on.

Constructors in org.apache.nutch.searcher with parameters of type WritableComparable

Hit(int indexNo, int indexDocNo, WritableComparable sortValue, String dedupValue)

Hit(int indexDocNo, WritableComparable sortValue, String dedupValue)

Uses of WritableComparable in org.apache.nutch.tools

Classes in org.apache.nutch.tools that implement WritableComparable

static class	FetchListTool.SortableScore SortableScore is just a WritableComparable Float!
static class	UpdateSegmentsFromDb.SegmentPage Used internally only.

Methods in org.apache.nutch.tools with parameters of type WritableComparable

int	UpdateSegmentsFromDb.BySegmentComparator.compare(WritableComparable wc1, WritableComparable wc2)