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

Packages that use Writable
org.apache.hadoop.conf Configuration of system parameters. 
org.apache.hadoop.contrib.index.example   
org.apache.hadoop.contrib.index.mapred   
org.apache.hadoop.contrib.utils.join   
org.apache.hadoop.examples Hadoop example code. 
org.apache.hadoop.fs An abstract file system API. 
org.apache.hadoop.fs.permission   
org.apache.hadoop.io Generic i/o code for use when reading and writing data to the network, to databases, and to files. 
org.apache.hadoop.io.serializer This package provides a mechanism for using different serialization frameworks in Hadoop. 
org.apache.hadoop.ipc Tools to help define network clients and servers. 
org.apache.hadoop.mapred A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner. 
org.apache.hadoop.mapred.join Given a set of sorted datasets keyed with the same class and yielding equal partitions, it is possible to effect a join of those datasets prior to the map. 
org.apache.hadoop.mapred.lib Library of generally useful mappers, reducers, and partitioners. 
org.apache.hadoop.mapred.lib.aggregate Classes for performing various counting and aggregations. 
org.apache.hadoop.mapred.lib.db org.apache.hadoop.mapred.lib.db Package 
org.apache.hadoop.mapreduce   
org.apache.hadoop.mapreduce.lib.db   
org.apache.hadoop.mapreduce.lib.output   
org.apache.hadoop.mapreduce.security.token   
org.apache.hadoop.mapreduce.security.token.delegation   
org.apache.hadoop.mapreduce.split   
org.apache.hadoop.record Hadoop record I/O contains classes and a record description language translator for simplifying serialization and deserialization of records in a language-neutral manner. 
org.apache.hadoop.record.meta   
org.apache.hadoop.security   
org.apache.hadoop.security.authorize   
org.apache.hadoop.security.token   
org.apache.hadoop.security.token.delegation   
org.apache.hadoop.streaming.io   
org.apache.hadoop.typedbytes Typed bytes are sequences of bytes in which the first byte is a type code. 
org.apache.hadoop.util Common utilities. 
org.apache.hadoop.util.bloom   
 

Uses of Writable in org.apache.hadoop.conf
 

Classes in org.apache.hadoop.conf that implement Writable
 class Configuration
          Provides access to configuration parameters.
 

Uses of Writable in org.apache.hadoop.contrib.index.example
 

Classes in org.apache.hadoop.contrib.index.example that implement Writable
 class LineDocTextAndOp
          This class represents an operation.
 

Uses of Writable in org.apache.hadoop.contrib.index.mapred
 

Classes in org.apache.hadoop.contrib.index.mapred with type parameters of type Writable
 interface ILocalAnalysis<K extends WritableComparable,V extends Writable>
          Application specific local analysis.
 class IndexUpdateMapper<K extends WritableComparable,V extends Writable>
          This class applies local analysis on a key-value pair and then convert the result docid-operation pair to a shard-and-intermediate form pair.
 

Classes in org.apache.hadoop.contrib.index.mapred that implement Writable
 class DocumentAndOp
          This class represents an indexing operation.
 class DocumentID
          The class represents a document id, which is of type text.
 class IntermediateForm
          An intermediate form for one or more parsed Lucene documents and/or delete terms.
 class Shard
          This class represents the metadata of a shard.
 

Methods in org.apache.hadoop.contrib.index.mapred that return types with arguments of type Writable
static Class<? extends Writable> IndexUpdateMapper.getMapOutputValueClass()
          Get the map output value class.
static Class<? extends Writable> IndexUpdateReducer.getOutputValueClass()
          Get the reduce output value class.
 

Uses of Writable in org.apache.hadoop.contrib.utils.join
 

Classes in org.apache.hadoop.contrib.utils.join that implement Writable
 class TaggedMapOutput
          This abstract class serves as the base class for the values that flow from the mappers to the reducers in a data join job.
 

Methods in org.apache.hadoop.contrib.utils.join that return Writable
abstract  Writable TaggedMapOutput.getData()
           
 

Uses of Writable in org.apache.hadoop.examples
 

Classes in org.apache.hadoop.examples that implement Writable
static class MultiFileWordCount.WordOffset
          This record keeps <filename,offset> pairs.
static class SecondarySort.IntPair
          Define a pair of integers that are writable.
static class SleepJob.EmptySplit
           
 

Method parameters in org.apache.hadoop.examples with type arguments of type Writable
 void PiEstimator.PiReducer.reduce(BooleanWritable isInside, Iterator<LongWritable> values, OutputCollector<WritableComparable<?>,Writable> output, Reporter reporter)
          Accumulate number of points inside/outside results from the mappers.
 

Uses of Writable in org.apache.hadoop.fs
 

Classes in org.apache.hadoop.fs that implement Writable
 class BlockLocation
           
 class ContentSummary
          Store the summary of a content (a directory or a file).
 class FileChecksum
          An abstract class representing file checksums for files.
 class FileStatus
          Interface that represents the client side information for a file.
 class MD5MD5CRC32FileChecksum
          MD5 of MD5 of CRC32.
 

Uses of Writable in org.apache.hadoop.fs.permission
 

Classes in org.apache.hadoop.fs.permission that implement Writable
 class FsPermission
          A class for file/directory permissions.
 class PermissionStatus
          Store permission related information.
 

Uses of Writable in org.apache.hadoop.io
 

Subinterfaces of Writable in org.apache.hadoop.io
 interface WritableComparable<T>
          A Writable which is also Comparable.
 

Classes in org.apache.hadoop.io that implement Writable
 class AbstractMapWritable
          Abstract base class for MapWritable and SortedMapWritable Unlike org.apache.nutch.crawl.MapWritable, this class allows creation of MapWritable<Writable, MapWritable> so the CLASS_TO_ID and ID_TO_CLASS maps travel with the class instead of being static.
 class ArrayWritable
          A Writable for arrays containing instances of a class.
 class BooleanWritable
          A WritableComparable for booleans.
 class BytesWritable
          A byte sequence that is usable as a key or value.
 class ByteWritable
          A WritableComparable for a single byte.
 class CompressedWritable
          A base-class for Writables which store themselves compressed and lazily inflate on field access.
 class DoubleWritable
          Writable for Double values.
 class FloatWritable
          A WritableComparable for floats.
 class GenericWritable
          A wrapper for Writable instances.
 class IntWritable
          A WritableComparable for ints.
 class LongWritable
          A WritableComparable for longs.
 class MapWritable
          A Writable Map.
 class MD5Hash
          A Writable for MD5 hash values.
 class NullWritable
          Singleton Writable with no data.
 class ObjectWritable
          A polymorphic Writable that writes an instance with it's class name.
static class SequenceFile.Metadata
          The class encapsulating with the metadata of a file.
 class SortedMapWritable
          A Writable SortedMap.
 class Text
          This class stores text using standard UTF8 encoding.
 class TwoDArrayWritable
          A Writable for 2D arrays containing a matrix of instances of a class.
 class UTF8
          Deprecated. replaced by Text
 class VersionedWritable
          A base class for Writables that provides version checking.
 class VIntWritable
          A WritableComparable for integer values stored in variable-length format.
 class VLongWritable
          A WritableComparable for longs in a variable-length format.
 

Methods in org.apache.hadoop.io with type parameters of type Writable
static
<T extends Writable>
T
WritableUtils.clone(T orig, Configuration conf)
          Make a copy of a writable object using serialization to a buffer.
 

Methods in org.apache.hadoop.io that return Writable
 Writable[][] TwoDArrayWritable.get()
           
 Writable GenericWritable.get()
          Return the wrapped instance.
 Writable[] ArrayWritable.get()
           
 Writable ArrayFile.Reader.get(long n, Writable value)
          Return the nth value in the file.
 Writable MapWritable.get(Object key)
          
 Writable SortedMapWritable.get(Object key)
          
 Writable BloomMapFile.Reader.get(WritableComparable key, Writable val)
          Fast version of the MapFile.Reader.get(WritableComparable, Writable) method.
 Writable MapFile.Reader.get(WritableComparable key, Writable val)
          Return the value for the named key, or null if none exists.
 Writable WritableFactory.newInstance()
          Return a new instance.
static Writable WritableFactories.newInstance(Class<? extends Writable> c)
          Create a new instance of a class with a defined factory.
static Writable WritableFactories.newInstance(Class<? extends Writable> c, Configuration conf)
          Create a new instance of a class with a defined factory.
 Writable ArrayFile.Reader.next(Writable value)
          Read and return the next value in the file.
 Writable SortedMapWritable.put(WritableComparable key, Writable value)
          
 Writable MapWritable.put(Writable key, Writable value)
          
 Writable MapWritable.remove(Object key)
          
 Writable SortedMapWritable.remove(Object key)
          
 

Methods in org.apache.hadoop.io that return types with arguments of type Writable
 Set<Map.Entry<Writable,Writable>> MapWritable.entrySet()
          
 Set<Map.Entry<Writable,Writable>> MapWritable.entrySet()
          
 Set<Map.Entry<WritableComparable,Writable>> SortedMapWritable.entrySet()
          
 SortedMap<WritableComparable,Writable> SortedMapWritable.headMap(WritableComparable toKey)
          
 Set<Writable> MapWritable.keySet()
          
 SortedMap<WritableComparable,Writable> SortedMapWritable.subMap(WritableComparable fromKey, WritableComparable toKey)
          
 SortedMap<WritableComparable,Writable> SortedMapWritable.tailMap(WritableComparable fromKey)
          
 Collection<Writable> MapWritable.values()
          
 Collection<Writable> SortedMapWritable.values()
          
 

Methods in org.apache.hadoop.io with parameters of type Writable
 void ArrayFile.Writer.append(Writable value)
          Append a value to the file.
 void BloomMapFile.Writer.append(WritableComparable key, Writable val)
           
 void MapFile.Writer.append(WritableComparable key, Writable val)
          Append a key/value pair to the map.
 void SequenceFile.Writer.append(Writable key, Writable val)
          Append a key/value pair.
static void WritableUtils.cloneInto(Writable dst, Writable src)
          Deprecated. use ReflectionUtils.cloneInto instead.
protected  void AbstractMapWritable.copy(Writable other)
          Used by child copy constructors.
 Writable ArrayFile.Reader.get(long n, Writable value)
          Return the nth value in the file.
 Writable BloomMapFile.Reader.get(WritableComparable key, Writable val)
          Fast version of the MapFile.Reader.get(WritableComparable, Writable) method.
 Writable MapFile.Reader.get(WritableComparable key, Writable val)
          Return the value for the named key, or null if none exists.
 WritableComparable MapFile.Reader.getClosest(WritableComparable key, Writable val)
          Finds the record that is the closest match to the specified key.
 WritableComparable MapFile.Reader.getClosest(WritableComparable key, Writable val, boolean before)
          Finds the record that is the closest match to the specified key.
 void SequenceFile.Reader.getCurrentValue(Writable val)
          Get the 'value' corresponding to the last read 'key'.
 boolean SequenceFile.Reader.next(Writable key)
          Read the next key in the file into key, skipping its value.
 Writable ArrayFile.Reader.next(Writable value)
          Read and return the next value in the file.
 boolean MapFile.Reader.next(WritableComparable key, Writable val)
          Read the next key/value pair in the map into key and val.
 boolean SequenceFile.Reader.next(Writable key, Writable val)
          Read the next key/value pair in the file into key and val.
 Writable SortedMapWritable.put(WritableComparable key, Writable value)
          
 Writable MapWritable.put(Writable key, Writable value)
          
 void GenericWritable.set(Writable obj)
          Set the instance that is wrapped.
 void ArrayWritable.set(Writable[] values)
           
 void TwoDArrayWritable.set(Writable[][] values)
           
static byte[] WritableUtils.toByteArray(Writable... writables)
          Convert writables to a byte array
 

Method parameters in org.apache.hadoop.io with type arguments of type Writable
static long MapFile.fix(FileSystem fs, Path dir, Class<? extends Writable> keyClass, Class<? extends Writable> valueClass, boolean dryrun, Configuration conf)
          This method attempts to fix a corrupt MapFile by re-creating its index.
static long MapFile.fix(FileSystem fs, Path dir, Class<? extends Writable> keyClass, Class<? extends Writable> valueClass, boolean dryrun, Configuration conf)
          This method attempts to fix a corrupt MapFile by re-creating its index.
static Writable WritableFactories.newInstance(Class<? extends Writable> c)
          Create a new instance of a class with a defined factory.
static Writable WritableFactories.newInstance(Class<? extends Writable> c, Configuration conf)
          Create a new instance of a class with a defined factory.
 void MapWritable.putAll(Map<? extends Writable,? extends Writable> t)
          
 void MapWritable.putAll(Map<? extends Writable,? extends Writable> t)
          
 void SortedMapWritable.putAll(Map<? extends WritableComparable,? extends Writable> t)
          
 

Constructors in org.apache.hadoop.io with parameters of type Writable
ArrayWritable(Class<? extends Writable> valueClass, Writable[] values)
           
TwoDArrayWritable(Class valueClass, Writable[][] values)
           
 

Constructor parameters in org.apache.hadoop.io with type arguments of type Writable
ArrayFile.Writer(Configuration conf, FileSystem fs, String file, Class<? extends Writable> valClass)
          Create the named file for values of the named class.
ArrayFile.Writer(Configuration conf, FileSystem fs, String file, Class<? extends Writable> valClass, SequenceFile.CompressionType compress, Progressable progress)
          Create the named file for values of the named class.
ArrayWritable(Class<? extends Writable> valueClass)
           
ArrayWritable(Class<? extends Writable> valueClass, Writable[] values)
           
BloomMapFile.Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, Class<? extends Writable> valClass, SequenceFile.CompressionType compress, CompressionCodec codec, Progressable progress)
           
 

Uses of Writable in org.apache.hadoop.io.serializer
 

Methods in org.apache.hadoop.io.serializer that return types with arguments of type Writable
 Deserializer<Writable> WritableSerialization.getDeserializer(Class<Writable> c)
           
 Serializer<Writable> WritableSerialization.getSerializer(Class<Writable> c)
           
 

Method parameters in org.apache.hadoop.io.serializer with type arguments of type Writable
 Deserializer<Writable> WritableSerialization.getDeserializer(Class<Writable> c)
           
 Serializer<Writable> WritableSerialization.getSerializer(Class<Writable> c)
           
 

Uses of Writable in org.apache.hadoop.ipc
 

Methods in org.apache.hadoop.ipc that return Writable
 Writable RPC.Server.call(Class<?> protocol, Writable param, long receivedTime)
           
abstract  Writable Server.call(Class<?> protocol, Writable param, long receiveTime)
          Called for each call.
 Writable[] Client.call(Writable[] params, InetSocketAddress[] addresses)
          Deprecated. Use Client.call(Writable[], InetSocketAddress[], Class, UserGroupInformation, Configuration) instead
 Writable[] Client.call(Writable[] params, InetSocketAddress[] addresses, Class<?> protocol, UserGroupInformation ticket)
          Deprecated. Use Client.call(Writable[], InetSocketAddress[], Class, UserGroupInformation, Configuration) instead
 Writable[] Client.call(Writable[] params, InetSocketAddress[] addresses, Class<?> protocol, UserGroupInformation ticket, Configuration conf)
          Makes a set of calls in parallel.
 Writable Client.call(Writable param, org.apache.hadoop.ipc.Client.ConnectionId remoteId)
          Make a call, passing param, to the IPC server defined by remoteId, returning the value.
 Writable Client.call(Writable param, InetSocketAddress address)
          Deprecated. Use Client.call(Writable, ConnectionId) instead
 Writable Client.call(Writable param, InetSocketAddress addr, Class<?> protocol, UserGroupInformation ticket, int rpcTimeout)
          Deprecated. Use Client.call(Writable, ConnectionId) instead
 Writable Client.call(Writable param, InetSocketAddress addr, Class<?> protocol, UserGroupInformation ticket, int rpcTimeout, Configuration conf)
          Make a call, passing param, to the IPC server running at address which is servicing the protocol protocol, with the ticket credentials, rpcTimeout as timeout and conf as configuration for this connection, returning the value.
 Writable Client.call(Writable param, InetSocketAddress addr, UserGroupInformation ticket)
          Deprecated. Use Client.call(Writable, ConnectionId) instead
 Writable Server.call(Writable param, long receiveTime)
          Deprecated. Use Server.call(Class, Writable, long) instead
 

Methods in org.apache.hadoop.ipc with parameters of type Writable
 Writable RPC.Server.call(Class<?> protocol, Writable param, long receivedTime)
           
abstract  Writable Server.call(Class<?> protocol, Writable param, long receiveTime)
          Called for each call.
 Writable[] Client.call(Writable[] params, InetSocketAddress[] addresses)
          Deprecated. Use Client.call(Writable[], InetSocketAddress[], Class, UserGroupInformation, Configuration) instead
 Writable[] Client.call(Writable[] params, InetSocketAddress[] addresses, Class<?> protocol, UserGroupInformation ticket)
          Deprecated. Use Client.call(Writable[], InetSocketAddress[], Class, UserGroupInformation, Configuration) instead
 Writable[] Client.call(Writable[] params, InetSocketAddress[] addresses, Class<?> protocol, UserGroupInformation ticket, Configuration conf)
          Makes a set of calls in parallel.
 Writable Client.call(Writable param, org.apache.hadoop.ipc.Client.ConnectionId remoteId)
          Make a call, passing param, to the IPC server defined by remoteId, returning the value.
 Writable Client.call(Writable param, InetSocketAddress address)
          Deprecated. Use Client.call(Writable, ConnectionId) instead
 Writable Client.call(Writable param, InetSocketAddress addr, Class<?> protocol, UserGroupInformation ticket, int rpcTimeout)
          Deprecated. Use Client.call(Writable, ConnectionId) instead
 Writable Client.call(Writable param, InetSocketAddress addr, Class<?> protocol, UserGroupInformation ticket, int rpcTimeout, Configuration conf)
          Make a call, passing param, to the IPC server running at address which is servicing the protocol protocol, with the ticket credentials, rpcTimeout as timeout and conf as configuration for this connection, returning the value.
 Writable Client.call(Writable param, InetSocketAddress addr, UserGroupInformation ticket)
          Deprecated. Use Client.call(Writable, ConnectionId) instead
 Writable Server.call(Writable param, long receiveTime)
          Deprecated. Use Server.call(Class, Writable, long) instead
 

Constructor parameters in org.apache.hadoop.ipc with type arguments of type Writable
Client(Class<? extends Writable> valueClass, Configuration conf)
          Construct an IPC client with the default SocketFactory
Client(Class<? extends Writable> valueClass, Configuration conf, SocketFactory factory)
          Construct an IPC client whose values are of the given Writable class.
Server(String bindAddress, int port, Class<? extends Writable> paramClass, int handlerCount, Configuration conf)
           
Server(String bindAddress, int port, Class<? extends Writable> paramClass, int handlerCount, Configuration conf, String serverName)
           
Server(String bindAddress, int port, Class<? extends Writable> paramClass, int handlerCount, Configuration conf, String serverName, SecretManager<? extends TokenIdentifier> secretManager)
          Constructs a server listening on the named port and address.
 

Uses of Writable in org.apache.hadoop.mapred
 

Subinterfaces of Writable in org.apache.hadoop.mapred
 interface InputSplit
          InputSplit represents the data to be processed by an individual Mapper.
 

Classes in org.apache.hadoop.mapred that implement Writable
 class ClusterStatus
          Status information on the current state of the Map-Reduce cluster.
 class Counters
          A set of named counters.
static class Counters.Counter
          A counter record, comprising its name and value.
 class Counters.Group
          Group of counters, comprising of counters from a particular counter Enum class.
 class FileSplit
          A section of an input file.
 class JobConf
          A map/reduce job configuration.
 class JobProfile
          A JobProfile is a MapReduce primitive.
 class JobQueueInfo
          Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.
 class JobStatus
          Describes the current status of a job.
 class JvmTask
           
 class MapTaskCompletionEventsUpdate
          A class that represents the communication between the tasktracker and child tasks w.r.t the map task completion events.
 class MultiFileSplit
          Deprecated. Use CombineFileSplit instead
 class QueueAclsInfo
          Class to encapsulate Queue ACLs for a particular user.
 class Task
          Base class for tasks.
 class TaskCompletionEvent
          This is used to track task completion events on job tracker.
 class TaskReport
          A report on the state of a task.
 class TaskStatus
          Describes the current status of a task.
 class TaskTrackerStatus
          A TaskTrackerStatus is a MapReduce primitive.
 

Methods in org.apache.hadoop.mapred with type parameters of type Writable
static
<K extends WritableComparable,V extends Writable>
Writable
MapFileOutputFormat.getEntry(MapFile.Reader[] readers, Partitioner<K,V> partitioner, K key, V value)
          Get an entry from output generated by this class.
 

Methods in org.apache.hadoop.mapred that return Writable
static
<K extends WritableComparable,V extends Writable>
Writable
MapFileOutputFormat.getEntry(MapFile.Reader[] readers, Partitioner<K,V> partitioner, K key, V value)
          Get an entry from output generated by this class.
 

Methods in org.apache.hadoop.mapred that return types with arguments of type Writable
 RecordWriter<WritableComparable,Writable> MapFileOutputFormat.getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress)
           
static Class<? extends Writable> SequenceFileAsBinaryOutputFormat.getSequenceFileOutputValueClass(JobConf conf)
          Get the value class for the SequenceFile
 

Uses of Writable in org.apache.hadoop.mapred.join
 

Classes in org.apache.hadoop.mapred.join with type parameters of type Writable
 class ArrayListBackedIterator<X extends Writable>
          This class provides an implementation of ResetableIterator.
 interface ComposableInputFormat<K extends WritableComparable,V extends Writable>
          Refinement of InputFormat requiring implementors to provide ComposableRecordReader instead of RecordReader.
 interface ComposableRecordReader<K extends WritableComparable,V extends Writable>
          Additional operations required of a RecordReader to participate in a join.
 class CompositeRecordReader<K extends WritableComparable,V extends Writable,X extends Writable>
          A RecordReader that can effect joins of RecordReaders sharing a common key type and partitioning.
 class CompositeRecordReader<K extends WritableComparable,V extends Writable,X extends Writable>
          A RecordReader that can effect joins of RecordReaders sharing a common key type and partitioning.
 class MultiFilterRecordReader<K extends WritableComparable,V extends Writable>
          Base class for Composite join returning values derived from multiple sources, but generally not tuples.
 class OverrideRecordReader<K extends WritableComparable,V extends Writable>
          Prefer the "rightmost" data source for this key.
 interface ResetableIterator<T extends Writable>
          This defines an interface to a stateful Iterator that can replay elements added to it directly.
static class ResetableIterator.EMPTY<U extends Writable>
           
 class StreamBackedIterator<X extends Writable>
          This class provides an implementation of ResetableIterator.
 class WrappedRecordReader<K extends WritableComparable,U extends Writable>
          Proxy class for a RecordReader participating in the join framework.
 

Classes in org.apache.hadoop.mapred.join that implement Writable
 class CompositeInputSplit
          This InputSplit contains a set of child InputSplits.
 class TupleWritable
          Writable type storing multiple Writables.
 

Methods in org.apache.hadoop.mapred.join that return Writable
 Writable TupleWritable.get(int i)
          Get ith Writable from Tuple.
 

Methods in org.apache.hadoop.mapred.join that return types with arguments of type Writable
 Iterator<Writable> TupleWritable.iterator()
          Return an iterator over the elements in this tuple.
 

Constructors in org.apache.hadoop.mapred.join with parameters of type Writable
TupleWritable(Writable[] vals)
          Initialize tuple with storage; unknown whether any of them contain "written" values.
 

Uses of Writable in org.apache.hadoop.mapred.lib
 

Classes in org.apache.hadoop.mapred.lib that implement Writable
 class CombineFileSplit
          A sub-collection of input files.
 

Methods in org.apache.hadoop.mapred.lib that return types with arguments of type Writable
static Class<? extends Writable> MultipleOutputs.getNamedOutputValueClass(JobConf conf, String namedOutput)
          Returns the value class for a named output.
 

Uses of Writable in org.apache.hadoop.mapred.lib.aggregate
 

Classes in org.apache.hadoop.mapred.lib.aggregate with type parameters of type Writable
 class ValueAggregatorCombiner<K1 extends WritableComparable,V1 extends Writable>
          This class implements the generic combiner of Aggregate.
 class ValueAggregatorJobBase<K1 extends WritableComparable,V1 extends Writable>
          This abstract class implements some common functionalities of the the generic mapper, reducer and combiner classes of Aggregate.
 class ValueAggregatorMapper<K1 extends WritableComparable,V1 extends Writable>
          This class implements the generic mapper of Aggregate.
 class ValueAggregatorReducer<K1 extends WritableComparable,V1 extends Writable>
          This class implements the generic reducer of Aggregate.
 

Uses of Writable in org.apache.hadoop.mapred.lib.db
 

Classes in org.apache.hadoop.mapred.lib.db that implement Writable
protected static class DBInputFormat.DBInputSplit
          A InputSplit that spans a set of rows
static class DBInputFormat.NullDBWritable
          A Class that does nothing, implementing DBWritable
 

Uses of Writable in org.apache.hadoop.mapreduce
 

Classes in org.apache.hadoop.mapreduce that implement Writable
 class ClusterMetrics
          Status information on the current state of the Map-Reduce cluster.
 class Counter
          A named counter that tracks the progress of a map/reduce job.
 class CounterGroup
          A group of Counters that logically belong together.
 class ID
          A general identifier, which internally stores the id as an integer.
 class JobID
          JobID represents the immutable and unique identifier for the job.
 class TaskAttemptID
          TaskAttemptID represents the immutable and unique identifier for a task attempt.
 class TaskID
          TaskID represents the immutable and unique identifier for a Map or Reduce Task.
 

Uses of Writable in org.apache.hadoop.mapreduce.lib.db
 

Classes in org.apache.hadoop.mapreduce.lib.db that implement Writable
static class DataDrivenDBInputFormat.DataDrivenDBInputSplit
          A InputSplit that spans a set of rows
 

Uses of Writable in org.apache.hadoop.mapreduce.lib.output
 

Methods in org.apache.hadoop.mapreduce.lib.output that return types with arguments of type Writable
static Class<? extends Writable> SequenceFileAsBinaryOutputFormat.getSequenceFileOutputValueClass(JobContext job)
          Get the value class for the SequenceFile
 

Uses of Writable in org.apache.hadoop.mapreduce.security.token
 

Classes in org.apache.hadoop.mapreduce.security.token that implement Writable
 class JobTokenIdentifier
          The token identifier for job token
 

Uses of Writable in org.apache.hadoop.mapreduce.security.token.delegation
 

Classes in org.apache.hadoop.mapreduce.security.token.delegation that implement Writable
 class DelegationTokenIdentifier
          A delegation token identifier that is specific to MapReduce.
 

Uses of Writable in org.apache.hadoop.mapreduce.split
 

Classes in org.apache.hadoop.mapreduce.split that implement Writable
static class JobSplit.SplitMetaInfo
          This represents the meta information about the task split.
 

Uses of Writable in org.apache.hadoop.record
 

Classes in org.apache.hadoop.record that implement Writable
 class Record
          Abstract class that is extended by generated classes.
 

Uses of Writable in org.apache.hadoop.record.meta
 

Classes in org.apache.hadoop.record.meta that implement Writable
 class RecordTypeInfo
          A record's Type Information object which can read/write itself.
 

Uses of Writable in org.apache.hadoop.security
 

Classes in org.apache.hadoop.security that implement Writable
 class Credentials
          A class that provides the facilities of reading and writing secret keys and Tokens.
 

Uses of Writable in org.apache.hadoop.security.authorize
 

Classes in org.apache.hadoop.security.authorize that implement Writable
 class AccessControlList
          Class representing a configured access control list.
 

Uses of Writable in org.apache.hadoop.security.token
 

Classes in org.apache.hadoop.security.token that implement Writable
 class Token<T extends TokenIdentifier>
          The client-side form of the token.
 class TokenIdentifier
          An identifier that identifies a token, may contain public information about a token, including its kind (or type).
 

Uses of Writable in org.apache.hadoop.security.token.delegation
 

Classes in org.apache.hadoop.security.token.delegation that implement Writable
 class AbstractDelegationTokenIdentifier
           
 class DelegationKey
          Key used for generating and verifying delegation tokens
 

Uses of Writable in org.apache.hadoop.streaming.io
 

Methods in org.apache.hadoop.streaming.io with parameters of type Writable
 void RawBytesInputWriter.writeKey(Writable key)
           
 void RawBytesInputWriter.writeValue(Writable value)
           
 

Uses of Writable in org.apache.hadoop.typedbytes
 

Classes in org.apache.hadoop.typedbytes that implement Writable
 class TypedBytesWritable
          Writable for typed bytes.
 

Methods in org.apache.hadoop.typedbytes that return Writable
 Writable TypedBytesWritableInput.read()
           
 Writable TypedBytesWritableInput.readWritable()
           
 Writable TypedBytesWritableInput.readWritable(Writable writable)
           
 

Methods in org.apache.hadoop.typedbytes that return types with arguments of type Writable
 Class<? extends Writable> TypedBytesWritableInput.readType()
           
 

Methods in org.apache.hadoop.typedbytes with parameters of type Writable
 Writable TypedBytesWritableInput.readWritable(Writable writable)
           
 void TypedBytesWritableOutput.write(Writable w)
           
 void TypedBytesWritableOutput.writeWritable(Writable w)
           
 

Uses of Writable in org.apache.hadoop.util
 

Methods in org.apache.hadoop.util with parameters of type Writable
static void ReflectionUtils.cloneWritableInto(Writable dst, Writable src)
          Deprecated. 
 

Uses of Writable in org.apache.hadoop.util.bloom
 

Classes in org.apache.hadoop.util.bloom that implement Writable
 class BloomFilter
          Implements a Bloom filter, as defined by Bloom in 1970.
 class CountingBloomFilter
          Implements a counting Bloom filter, as defined by Fan et al.
 class DynamicBloomFilter
          Implements a dynamic Bloom filter, as defined in the INFOCOM 2006 paper.
 class Filter
          Defines the general behavior of a filter.
 class Key
          The general behavior of a key that must be stored in a filter.
 class RetouchedBloomFilter
          Implements a retouched Bloom filter, as defined in the CoNEXT 2006 paper.
 



Copyright © 2009 The Apache Software Foundation