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

Packages that use Writable

org.apache.nutch.db	Web database: tracks page fetches and link structure.
org.apache.nutch.fetcher	The Nutch robot.
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.ipc	Client/Server code used by distributed search.
org.apache.nutch.linkdb
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.ndfs
org.apache.nutch.pagedb
org.apache.nutch.parse
org.apache.nutch.protocol
org.apache.nutch.searcher	Search API
org.apache.nutch.tools

Uses of Writable in org.apache.nutch.db

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

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 with parameters of type Writable

void	EditSectionGroupWriter.append(WritableComparable key, Writable val) Add an instruction and append it.
void	WebDBWriter.PageInstructionWriter.appendInstructionInfo(SequenceFile.Writer writer, Page page, int opcode, Writable val) Append the PageInstruction info to the indicated SequenceFile, and keep the PI for later reuse.
void	WebDBWriter.PageInstructionWriter.appendInstructionInfo(SequenceFile.Writer writer, Page page, Link link, int opcode, Writable val) Append the PageInstruction info to the indicated SequenceFile, and keep the PI for later reuse.
void	WebDBWriter.LinkInstructionWriter.appendInstructionInfo(SequenceFile.Writer writer, Link link, int opcode, Writable val) Append the LinkInstruction info to the indicated SequenceFile and keep the LI for later reuse.
void	DistributedWebDBWriter.PageInstructionWriter.appendInstructionInfo(EditSectionGroupWriter writer, Page page, int opcode, Writable val) Append the PageInstruction info to the indicated SequenceFile, and keep the PI for later reuse.
void	DistributedWebDBWriter.PageInstructionWriter.appendInstructionInfo(EditSectionGroupWriter writer, Page page, Link link, int opcode, Writable val) Append the PageInstruction info to the indicated SequenceFile, and keep the PI for later reuse.
void	EditSectionWriter.append(WritableComparable key, Writable val) Add a key/val pair
void	DistributedWebDBWriter.LinkInstructionWriter.appendInstructionInfo(EditSectionGroupWriter writer, Link link, int opcode, Writable val) Append the LinkInstruction info to the indicated SequenceFile and keep the LI for later reuse.

Uses of Writable in org.apache.nutch.fetcher

Classes in org.apache.nutch.fetcher that implement Writable

class

FetcherOutput An entry in the fetcher's output.

Uses of Writable in org.apache.nutch.indexer

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

static class

DeleteDuplicates.IndexedDoc The key used in sorting for duplicates.

Uses of Writable in org.apache.nutch.io

Subinterfaces of Writable in org.apache.nutch.io

interface

WritableComparable An interface which extends both Writable and Comparable.

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

class	ArrayWritable A Writable for arrays containing instances of a class.
class	BooleanWritable A WritableComparable for booleans.
class	BytesWritable A Writable for byte arrays.
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	NullWritable Singleton Writable with no data.
class	TwoDArrayWritable A Writable for 2D arrays containing a matrix of instances of a class.
class	UTF8 A WritableComparable for strings that uses the UTF8 encoding.
class	VersionedWritable A base class for Writables that provides version checking.

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

Writable	MapFile.Reader.get(WritableComparable key, Writable val) Return the value for the named key, or null if none exists.
Writable[][]	TwoDArrayWritable.get()
Writable[]	ArrayWritable.get()
Writable	ArrayFile.Reader.next(Writable value) Read and return the next value in the file.
Writable	ArrayFile.Reader.get(long n, Writable value) Return the nth value in the file.

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

void	MapFile.Writer.append(WritableComparable key, Writable val) Append a key/value pair to the map.
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	SequenceFile.Writer.append(Writable key, Writable val) Append a key/value pair.
boolean	SequenceFile.Reader.next(Writable key) Read the next key in the file into key, skipping its value.
boolean	SequenceFile.Reader.next(Writable key, Writable val) Read the next key/value pair in the file into key and val.
void	ArrayFile.Writer.append(Writable value) Append a value to the file.
void	TwoDArrayWritable.set(Writable[][] values)
void	ArrayWritable.set(Writable[] values)
Writable	ArrayFile.Reader.next(Writable value) Read and return the next value in the file.
Writable	ArrayFile.Reader.get(long n, Writable value) Return the nth value in the file.

Constructors in org.apache.nutch.io with parameters of type Writable

TwoDArrayWritable(Class valueClass, Writable[][] values)

ArrayWritable(Class valueClass, Writable[] values)

Uses of Writable in org.apache.nutch.ipc

Methods in org.apache.nutch.ipc that return Writable

abstract Writable	Server.call(Writable param) Called for each call.
Writable	Client.call(Writable param, InetSocketAddress address) Make a call, passing param, to the IPC server running at address, returning the value.
Writable[]	Client.call(Writable[] params, InetSocketAddress[] addresses) Makes a set of calls in parallel.

Methods in org.apache.nutch.ipc with parameters of type Writable

abstract Writable	Server.call(Writable param) Called for each call.
Writable	Client.call(Writable param, InetSocketAddress address) Make a call, passing param, to the IPC server running at address, returning the value.
Writable[]	Client.call(Writable[] params, InetSocketAddress[] addresses) Makes a set of calls in parallel.

Uses of Writable in org.apache.nutch.linkdb

Classes in org.apache.nutch.linkdb that implement Writable

class

LinkAnalysisEntry An entry in the LinkAnalysisTool's output.

Uses of Writable in org.apache.nutch.mapReduce

Classes in org.apache.nutch.mapReduce that implement Writable

class	FileSplit A section of an input file.
class	JobProfile A JobProfile is a MapReduce primitive.
class	JobStatus Describes the current status of a job.
class	MapOutputFile A local file to be transferred via the MapOutputProtocol.
class	MapOutputLocation The location of a map output file, as passed to a reduce task via the InterTrackerProtocol.
class	MapTask A Map task.
class	ReduceTask A Reduce task.
class	Task Base class for tasks.
class	TaskStatus Describes the current status of a task.
class	TaskTrackerStatus A TaskTrackerStatus is a MapReduce primitive.

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

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.
boolean	RecordReader.next(Writable key, Writable value) Reads the next key/value pair.

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

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

void	IdentityMapper.map(WritableComparable key, Writable val, OutputCollector output) The identify function.
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 Writable in org.apache.nutch.ndfs

Classes in org.apache.nutch.ndfs that implement Writable

class	Block A Block is a Nutch FS primitive, identified by a long.
class	DatanodeInfo DatanodeInfo tracks stats on a given node
class	FSParam IPC param
class	FSResults The result of an NFS IPC call.
class	HeartbeatData Heartbeat data
class	NDFSFileInfo NDFSFileInfo tracks info about remote files, including name, size, etc.

Fields in org.apache.nutch.ndfs declared as Writable

Writable	FSResults.first
Writable	FSResults.second
Writable	FSParam.first
Writable	FSParam.second

Methods in org.apache.nutch.ndfs that return Writable

Writable

NDFS.NameNode.call(Writable param) This method implements the call invoked by client.

Methods in org.apache.nutch.ndfs with parameters of type Writable

Writable

NDFS.NameNode.call(Writable param) This method implements the call invoked by client.

Constructors in org.apache.nutch.ndfs with parameters of type Writable

FSResults(byte op, Writable first)

FSResults(byte op, Writable first, Writable second)

Uses of Writable in org.apache.nutch.pagedb

Classes in org.apache.nutch.pagedb that implement Writable

class

FetchListEntry

Uses of Writable in org.apache.nutch.parse

Classes in org.apache.nutch.parse that implement Writable

class	Outlink
class	ParseData Data extracted from a page's content.
class	ParseStatus
class	ParseText

Uses of Writable in org.apache.nutch.protocol

Classes in org.apache.nutch.protocol that implement Writable

class	Content
class	ProtocolStatus

Uses of Writable in org.apache.nutch.searcher

Classes in org.apache.nutch.searcher that implement Writable

class	Hit A document which matched a query in an index.
class	HitDetails Data stored in the index for a hit.
class	Hits A set of hits matching a query.
class	Query A Nutch query.

Uses of Writable in org.apache.nutch.tools

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

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