Modifier and Type | Class and Description |
---|---|
class |
Configuration
Provides access to configuration parameters.
|
Modifier and Type | Class and Description |
---|---|
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.
|
Modifier and Type | Method and Description |
---|---|
abstract Writable |
TaggedMapOutput.getData() |
Modifier and Type | Class and Description |
---|---|
static class |
BaileyBorweinPlouffe.BbpSplit
Input split for the
BaileyBorweinPlouffe.BbpInputFormat . |
static class |
MultiFileWordCount.WordOffset
This record keeps <filename,offset> pairs.
|
static class |
SecondarySort.IntPair
Define a pair of integers that are writable.
|
Modifier and Type | Class and Description |
---|---|
static class |
DistSum.Machine.SummationSplit
Split for the summations
|
class |
SummationWritable
A Writable class for Summation
|
class |
TaskResult
A class for map task results or reduce task results.
|
Modifier and Type | Class and Description |
---|---|
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 |
FsServerDefaults
Provides server default configuration values to clients.
|
class |
FsStatus
This class is used to represent the capacity, free and used space on a
FileSystem . |
class |
LocatedFileStatus
This class defines a FileStatus that includes a file's block locations.
|
class |
MD5MD5CRC32CastagnoliFileChecksum
For CRC32 with the Castagnoli polynomial
|
class |
MD5MD5CRC32FileChecksum
MD5 of MD5 of CRC32.
|
class |
MD5MD5CRC32GzipFileChecksum
For CRC32 with the Gzip polynomial
|
Modifier and Type | Class and Description |
---|---|
class |
FsPermission
A class for file/directory permissions.
|
class |
PermissionStatus
Store permission related information.
|
Modifier and Type | Class and Description |
---|---|
class |
DeprecatedUTF8
A simple wrapper around
UTF8 . |
static class |
DistributedFileSystem.DiskStatus
Deprecated.
Use
FsStatus instead |
class |
HdfsConfiguration
Adds deprecated keys into the configuration.
|
Modifier and Type | Class and Description |
---|---|
class |
Block
A Block is a Hadoop FS primitive, identified by a
long.
|
Modifier and Type | Class and Description |
---|---|
class |
BlockKey
Key used for generating and verifying block tokens
|
class |
BlockTokenIdentifier |
class |
ExportedBlockKeys
Object for passing block keys
|
Modifier and Type | Class and Description |
---|---|
class |
DelegationTokenIdentifier
A delegation token identifier that is specific to HDFS.
|
Modifier and Type | Class and Description |
---|---|
class |
BlockInfo
BlockInfo class maintains for a given block
the
INodeFile it is part of and datanodes where the replicas of
the block are stored. |
class |
BlockInfoUnderConstruction
Represents a block that is currently being constructed.
This is usually the last block of a file opened for write or append. |
Modifier and Type | Class and Description |
---|---|
class |
FinalizedReplica
This class describes a replica that has been finalized.
|
class |
ReplicaBeingWritten
This class represents replicas being written.
|
class |
ReplicaInfo
This class is used by datanodes to maintain meta data of its replicas.
|
class |
ReplicaInPipeline
This class defines a replica in a pipeline, which
includes a persistent replica being written to by a dfs client or
a temporary replica being replicated by a source datanode or
being copied for the balancing purpose.
|
class |
ReplicaUnderRecovery
This class represents replicas that are under block recovery
It has a recovery id that is equal to the generation stamp
that the replica will be bumped to after recovery
The recovery id is used to handle multiple concurrent block recoveries.
|
class |
ReplicaWaitingToBeRecovered
This class represents a replica that is waiting to be recovered.
|
Modifier and Type | Class and Description |
---|---|
class |
ReplicaRecoveryInfo
Replica recovery information.
|
Modifier and Type | Interface and Description |
---|---|
interface |
WritableComparable<T>
A
Writable which is also Comparable . |
Modifier and Type | Class and Description |
---|---|
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 |
ArrayPrimitiveWritable
This is a wrapper class.
|
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 |
EnumSetWritable<E extends Enum<E>>
A Writable wrapper for EnumSet.
|
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 |
ShortWritable
A WritableComparable for shorts.
|
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.
|
Modifier and Type | Method and Description |
---|---|
static <T extends Writable> |
WritableUtils.clone(T orig,
Configuration conf)
Make a copy of a writable object using serialization to a buffer.
|
Modifier and Type | Method and Description |
---|---|
Writable[] |
ArrayWritable.get() |
Writable |
GenericWritable.get()
Return the wrapped instance.
|
Writable[][] |
TwoDArrayWritable.get() |
Writable |
ArrayFile.Reader.get(long n,
Writable value)
Return the
n th value in the file. |
Writable |
SortedMapWritable.get(Object key) |
Writable |
MapWritable.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 |
SortedMapWritable.remove(Object key) |
Writable |
MapWritable.remove(Object key) |
Modifier and Type | Method and Description |
---|---|
Set<Map.Entry<WritableComparable,Writable>> |
SortedMapWritable.entrySet() |
Set<Map.Entry<Writable,Writable>> |
MapWritable.entrySet() |
Set<Map.Entry<Writable,Writable>> |
MapWritable.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> |
SortedMapWritable.values() |
Collection<Writable> |
MapWritable.values() |
Modifier and Type | Method and Description |
---|---|
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
n th 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'.
|
Writable |
ArrayFile.Reader.next(Writable value)
Read and return the next value in the file.
|
boolean |
SequenceFile.Reader.next(Writable key)
Read the next key in the file into
key , skipping its
value. |
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
|
Modifier and Type | Method and Description |
---|---|
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) |
Constructor and Description |
---|
ArrayWritable(Class<? extends Writable> valueClass,
Writable[] values) |
TwoDArrayWritable(Class valueClass,
Writable[][] values) |
Constructor and Description |
---|
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)
Deprecated.
|
Modifier and Type | Method and Description |
---|---|
Deserializer<Writable> |
WritableSerialization.getDeserializer(Class<Writable> c) |
Serializer<Writable> |
WritableSerialization.getSerializer(Class<Writable> c) |
Modifier and Type | Method and Description |
---|---|
Deserializer<Writable> |
WritableSerialization.getDeserializer(Class<Writable> c) |
Serializer<Writable> |
WritableSerialization.getSerializer(Class<Writable> c) |
Modifier and Type | Class and Description |
---|---|
class |
ProtocolSignature |
Modifier and Type | Method and Description |
---|---|
abstract Writable |
Server.call(RPC.RpcKind rpcKind,
String protocol,
Writable param,
long receiveTime)
Called for each call.
|
Writable |
RPC.Server.call(RPC.RpcKind rpcKind,
String protocol,
Writable rpcRequest,
long receiveTime) |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable rpcRequest,
Client.ConnectionId remoteId)
Make a call, passing
rpcRequest , to the IPC server defined by
remoteId , returning the rpc respond. |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable rpcRequest,
Client.ConnectionId remoteId,
int serviceClass)
Make a call, passing
rpcRequest , to the IPC server defined by
remoteId , returning the rpc respond. |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable param,
InetSocketAddress address)
Deprecated.
Use
Client.call(RPC.RpcKind, Writable,
ConnectionId) instead |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable param,
InetSocketAddress addr,
Class<?> protocol,
UserGroupInformation ticket,
int rpcTimeout)
Deprecated.
Use
Client.call(RPC.RpcKind, Writable,
ConnectionId) instead |
Writable |
Client.call(RPC.RpcKind rpcKind,
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 conf for this connection, returning the
value. |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable param,
InetSocketAddress addr,
UserGroupInformation ticket)
Deprecated.
Use
Client.call(RPC.RpcKind, Writable,
ConnectionId) instead |
Writable |
Client.call(Writable param,
Client.ConnectionId remoteId)
Same as {link
Client.call(RPC.RpcKind, Writable, ConnectionId)
except the rpcKind is RPC_BUILTIN |
Writable |
Client.call(Writable param,
InetSocketAddress address)
Same as
Client.call(RPC.RpcKind, Writable, ConnectionId)
for RPC_BUILTIN |
Writable |
Client.call(Writable param,
InetSocketAddress addr,
Class<?> protocol,
UserGroupInformation ticket,
int rpcTimeout,
Configuration conf)
Same as
Client.call(RPC.RpcKind, Writable, InetSocketAddress,
Class, UserGroupInformation, int, Configuration)
except that rpcKind is writable. |
Writable |
Client.call(Writable param,
InetSocketAddress addr,
Class<?> protocol,
UserGroupInformation ticket,
int rpcTimeout,
int serviceClass,
Configuration conf)
Same as
Client.call(Writable, InetSocketAddress,
Class, UserGroupInformation, int, Configuration)
except that specifying serviceClass. |
Writable |
Server.call(Writable param,
long receiveTime)
Deprecated.
Use
#call(RpcPayloadHeader.RpcKind, String,
Writable, long) instead |
Modifier and Type | Method and Description |
---|---|
Class<? extends Writable> |
Server.getRpcRequestWrapper(RpcHeaderProtos.RpcKindProto rpcKind) |
Modifier and Type | Method and Description |
---|---|
abstract Writable |
Server.call(RPC.RpcKind rpcKind,
String protocol,
Writable param,
long receiveTime)
Called for each call.
|
Writable |
RPC.Server.call(RPC.RpcKind rpcKind,
String protocol,
Writable rpcRequest,
long receiveTime) |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable rpcRequest,
Client.ConnectionId remoteId)
Make a call, passing
rpcRequest , to the IPC server defined by
remoteId , returning the rpc respond. |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable rpcRequest,
Client.ConnectionId remoteId,
int serviceClass)
Make a call, passing
rpcRequest , to the IPC server defined by
remoteId , returning the rpc respond. |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable param,
InetSocketAddress address)
Deprecated.
Use
Client.call(RPC.RpcKind, Writable,
ConnectionId) instead |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable param,
InetSocketAddress addr,
Class<?> protocol,
UserGroupInformation ticket,
int rpcTimeout)
Deprecated.
Use
Client.call(RPC.RpcKind, Writable,
ConnectionId) instead |
Writable |
Client.call(RPC.RpcKind rpcKind,
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 conf for this connection, returning the
value. |
Writable |
Client.call(RPC.RpcKind rpcKind,
Writable param,
InetSocketAddress addr,
UserGroupInformation ticket)
Deprecated.
Use
Client.call(RPC.RpcKind, Writable,
ConnectionId) instead |
Writable |
Client.call(Writable param,
Client.ConnectionId remoteId)
Same as {link
Client.call(RPC.RpcKind, Writable, ConnectionId)
except the rpcKind is RPC_BUILTIN |
Writable |
Client.call(Writable param,
InetSocketAddress address)
Same as
Client.call(RPC.RpcKind, Writable, ConnectionId)
for RPC_BUILTIN |
Writable |
Client.call(Writable param,
InetSocketAddress addr,
Class<?> protocol,
UserGroupInformation ticket,
int rpcTimeout,
Configuration conf)
Same as
Client.call(RPC.RpcKind, Writable, InetSocketAddress,
Class, UserGroupInformation, int, Configuration)
except that rpcKind is writable. |
Writable |
Client.call(Writable param,
InetSocketAddress addr,
Class<?> protocol,
UserGroupInformation ticket,
int rpcTimeout,
int serviceClass,
Configuration conf)
Same as
Client.call(Writable, InetSocketAddress,
Class, UserGroupInformation, int, Configuration)
except that specifying serviceClass. |
Writable |
Server.call(Writable param,
long receiveTime)
Deprecated.
Use
#call(RpcPayloadHeader.RpcKind, String,
Writable, long) instead |
Modifier and Type | Method and Description |
---|---|
Client |
ClientCache.getClient(Configuration conf,
SocketFactory factory,
Class<? extends Writable> valueClass)
Construct & cache an IPC client with the user-provided SocketFactory
if no cached client exists.
|
static void |
Server.registerProtocolEngine(RPC.RpcKind rpcKind,
Class<? extends Writable> rpcRequestWrapperClass,
org.apache.hadoop.ipc.RPC.RpcInvoker rpcInvoker)
Register a RPC kind and the class to deserialize the rpc request.
|
Constructor and Description |
---|
Server.Call(int id,
int retryCount,
Writable param,
Server.Connection connection) |
Server.Call(int id,
int retryCount,
Writable param,
Server.Connection connection,
RPC.RpcKind kind,
byte[] clientId) |
Constructor and Description |
---|
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. |
RPC.Server(String bindAddress,
int port,
Class<? extends Writable> paramClass,
int handlerCount,
int numReaders,
int queueSizePerHandler,
Configuration conf,
String serverName,
SecretManager<? extends TokenIdentifier> secretManager,
String portRangeConfig) |
Server(String bindAddress,
int port,
Class<? extends Writable> paramClass,
int handlerCount,
Configuration conf) |
Server(String bindAddress,
int port,
Class<? extends Writable> rpcRequestClass,
int handlerCount,
int numReaders,
int queueSizePerHandler,
Configuration conf,
String serverName,
SecretManager<? extends TokenIdentifier> secretManager) |
Server(String bindAddress,
int port,
Class<? extends Writable> rpcRequestClass,
int handlerCount,
int numReaders,
int queueSizePerHandler,
Configuration conf,
String serverName,
SecretManager<? extends TokenIdentifier> secretManager,
String portRangeConfig)
Constructs a server listening on the named port and address.
|
Modifier and Type | Interface and Description |
---|---|
interface |
InputSplit
InputSplit represents the data to be processed by an
individual Mapper . |
Modifier and Type | Class and Description |
---|---|
class |
ClusterStatus
Status information on the current state of the Map-Reduce cluster.
|
static class |
ClusterStatus.BlackListInfo
Class which encapsulates information about a blacklisted tasktracker.
|
static class |
Counters.Counter
A counter record, comprising its name and value.
|
static class |
Counters.Group
Group of counters, comprising of counters from a particular
counter Enum class. |
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 |
JvmTask
Task abstraction that can be serialized, implements the writable interface.
|
class |
MapTask
A Map task.
|
class |
MapTaskCompletionEventsUpdate
A class that represents the communication between the tasktracker and child
tasks w.r.t the map task completion events.
|
class |
MultiFileSplit
A sub-collection of input files.
|
class |
ReduceTask
A Reduce task.
|
class |
Task
Base class for tasks.
|
class |
TaskStatus
Describes the current status of a task.
|
class |
WrappedJvmID
A simple wrapper for increasing the visibility.
|
Modifier and Type | Method and Description |
---|---|
static <K extends WritableComparable,V extends Writable> |
MapFileOutputFormat.getEntry(MapFile.Reader[] readers,
Partitioner<K,V> partitioner,
K key,
V value)
Get an entry from output generated by this class.
|
Modifier and Type | Method and Description |
---|---|
static <K extends WritableComparable,V extends Writable> |
MapFileOutputFormat.getEntry(MapFile.Reader[] readers,
Partitioner<K,V> partitioner,
K key,
V value)
Get an entry from output generated by this class.
|
Modifier and Type | Method and Description |
---|---|
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 |
Modifier and Type | Class and Description |
---|---|
static class |
SleepJob.SleepSplit |
Modifier and Type | Class and Description |
---|---|
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.
|
Constructor and Description |
---|
TupleWritable(Writable[] vals)
Initialize tuple with storage; unknown whether any of them contain
"written" values.
|
Modifier and Type | Class and Description |
---|---|
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.
|
Modifier and Type | Interface and Description |
---|---|
interface |
Counter
A named counter that tracks the progress of a map/reduce job.
|
interface |
CounterGroup
A group of
Counter s that logically belong together. |
Modifier and Type | Class and Description |
---|---|
class |
ClusterMetrics
Status information on the current state of the Map-Reduce cluster.
|
class |
Counters
Counters holds per job/task counters, defined either by the
Map-Reduce framework or applications. |
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 |
JobStatus
Describes the current status of a job.
|
class |
QueueAclsInfo
Class to encapsulate Queue ACLs for a particular
user.
|
class |
QueueInfo
Class that contains the information regarding the Job Queues which are
maintained by the Hadoop Map/Reduce framework.
|
class |
TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for
a task attempt.
|
class |
TaskCompletionEvent
This is used to track task completion events on
job tracker.
|
class |
TaskID
TaskID represents the immutable and unique identifier for
a Map or Reduce Task.
|
class |
TaskReport
A report on the state of a task.
|
class |
TaskTrackerInfo
Information about TaskTracker.
|
Modifier and Type | Interface and Description |
---|---|
interface |
CounterGroupBase<T extends Counter>
The common counter group interface.
|
Modifier and Type | Class and Description |
---|---|
class |
AbstractCounter
An abstract counter class to provide common implementation of
the counter interface in both mapred and mapreduce packages.
|
class |
AbstractCounterGroup<T extends Counter>
An abstract class to provide common implementation of the
generic counter group in both mapred and mapreduce package.
|
class |
AbstractCounters<C extends Counter,G extends CounterGroupBase<C>>
An abstract class to provide common implementation for the Counters
container in both mapred and mapreduce packages.
|
class |
FileSystemCounterGroup<C extends Counter>
An abstract class to provide common implementation of the filesystem
counter group in both mapred and mapreduce packages.
|
static class |
FileSystemCounterGroup.FSCounter |
class |
FrameworkCounterGroup<T extends Enum<T>,C extends Counter>
An abstract class to provide common implementation for the framework
counter group in both mapred and mapreduce packages.
|
static class |
FrameworkCounterGroup.FrameworkCounter<T extends Enum<T>>
A counter facade for framework counters.
|
class |
GenericCounter
A generic counter implementation
|
Modifier and Type | Class and Description |
---|---|
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.
|
Modifier and Type | Class and Description |
---|---|
static class |
DataDrivenDBInputFormat.DataDrivenDBInputSplit
A InputSplit that spans a set of rows
|
static class |
DBInputFormat.DBInputSplit
A InputSplit that spans a set of rows
|
static class |
DBInputFormat.NullDBWritable
A Class that does nothing, implementing DBWritable
|
Modifier and Type | Class and Description |
---|---|
class |
CombineFileSplit
A sub-collection of input files.
|
class |
FileSplit
A section of an input file.
|
Modifier and Type | Class and Description |
---|---|
class |
ArrayListBackedIterator<X extends Writable>
This class provides an implementation of ResetableIterator.
|
class |
ComposableInputFormat<K extends WritableComparable<?>,V extends Writable>
Refinement of InputFormat requiring implementors to provide
ComposableRecordReader instead of RecordReader.
|
class |
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.
|
Modifier and Type | Class and Description |
---|---|
class |
CompositeInputSplit
This InputSplit contains a set of child InputSplits.
|
class |
TupleWritable
Writable type storing multiple
Writable s. |
Modifier and Type | Field and Description |
---|---|
protected X |
CompositeRecordReader.value |
Modifier and Type | Method and Description |
---|---|
Writable |
TupleWritable.get(int i)
Get ith Writable from Tuple.
|
Modifier and Type | Method and Description |
---|---|
Iterator<Writable> |
TupleWritable.iterator()
Return an iterator over the elements in this tuple.
|
Constructor and Description |
---|
TupleWritable(Writable[] vals)
Initialize tuple with storage; unknown whether any of them contain
"written" values.
|
Modifier and Type | Method and Description |
---|---|
static <K extends WritableComparable<?>,V extends Writable> |
MapFileOutputFormat.getEntry(MapFile.Reader[] readers,
Partitioner<K,V> partitioner,
K key,
V value)
Get an entry from output generated by this class.
|
Modifier and Type | Method and Description |
---|---|
static <K extends WritableComparable<?>,V extends Writable> |
MapFileOutputFormat.getEntry(MapFile.Reader[] readers,
Partitioner<K,V> partitioner,
K key,
V value)
Get an entry from output generated by this class.
|
Modifier and Type | Method and Description |
---|---|
RecordWriter<WritableComparable<?>,Writable> |
MapFileOutputFormat.getRecordWriter(TaskAttemptContext context) |
static Class<? extends Writable> |
SequenceFileAsBinaryOutputFormat.getSequenceFileOutputValueClass(JobContext job)
Get the value class for the
SequenceFile |
Modifier and Type | Class and Description |
---|---|
class |
JobTokenIdentifier
The token identifier for job token
|
Modifier and Type | Class and Description |
---|---|
static class |
JobSplit.SplitMetaInfo
This represents the meta information about the task split.
|
Modifier and Type | Class and Description |
---|---|
class |
ShuffleHeader
Shuffle Header information that is sent by the TaskTracker and
deciphered by the Fetcher thread of Reduce task
|
Modifier and Type | Class and Description |
---|---|
class |
MRDelegationTokenIdentifier
TokenIdentifier that identifies delegation tokens
issued by JobHistoryServer to delegate
MR tasks talking to the JobHistoryServer. |
Modifier and Type | Class and Description |
---|---|
class |
Record
Deprecated.
Replaced by Avro.
|
Modifier and Type | Class and Description |
---|---|
class |
RecordTypeInfo
Deprecated.
Replaced by Avro.
|
Modifier and Type | Class and Description |
---|---|
class |
Credentials
A class that provides the facilities of reading and writing
secret keys and Tokens.
|
Modifier and Type | Class and Description |
---|---|
class |
AccessControlList
Class representing a configured access control list.
|
Modifier and Type | Class and Description |
---|---|
class |
Token<T extends TokenIdentifier>
The client-side form of the token.
|
static class |
Token.PrivateToken<T extends TokenIdentifier>
Indicates whether the token is a clone.
|
class |
TokenIdentifier
An identifier that identifies a token, may contain public information
about a token, including its kind (or type).
|
Modifier and Type | Class and Description |
---|---|
class |
AbstractDelegationTokenIdentifier |
class |
DelegationKey
Key used for generating and verifying delegation tokens
|
Modifier and Type | Method and Description |
---|---|
void |
RawBytesInputWriter.writeKey(Writable key) |
void |
RawBytesInputWriter.writeValue(Writable value) |
Modifier and Type | Class and Description |
---|---|
class |
ResourceUsageMetrics
Captures the resource usage metrics.
|
Modifier and Type | Class and Description |
---|---|
class |
TypedBytesWritable
Writable for typed bytes.
|
Modifier and Type | Method and Description |
---|---|
Writable |
TypedBytesWritableInput.read() |
Writable |
TypedBytesWritableInput.readWritable() |
Writable |
TypedBytesWritableInput.readWritable(Writable writable) |
Modifier and Type | Method and Description |
---|---|
Class<? extends Writable> |
TypedBytesWritableInput.readType() |
Modifier and Type | Method and Description |
---|---|
Writable |
TypedBytesWritableInput.readWritable(Writable writable) |
void |
TypedBytesWritableOutput.write(Writable w) |
void |
TypedBytesWritableOutput.writeWritable(Writable w) |
Modifier and Type | Method and Description |
---|---|
static void |
ReflectionUtils.cloneWritableInto(Writable dst,
Writable src)
Deprecated.
|
Modifier and Type | Class and Description |
---|---|
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.
|
Modifier and Type | Class and Description |
---|---|
class |
YarnConfiguration |
Modifier and Type | Class and Description |
---|---|
static class |
AggregatedLogFormat.LogKey |
Modifier and Type | Class and Description |
---|---|
class |
AMRMTokenIdentifier
AMRMTokenIdentifier is the TokenIdentifier to be used by
ApplicationMasters to authenticate to the ResourceManager.
|
class |
ContainerTokenIdentifier
TokenIdentifier for a container.
|
class |
NMTokenIdentifier |
Modifier and Type | Class and Description |
---|---|
class |
ClientToAMTokenIdentifier |
class |
RMDelegationTokenIdentifier
Delegation Token Identifier that identifies the delegation tokens from the
Resource Manager.
|
Modifier and Type | Class and Description |
---|---|
class |
LocalizerTokenIdentifier |
Modifier and Type | Class and Description |
---|---|
class |
CapacitySchedulerConfiguration |
Modifier and Type | Class and Description |
---|---|
class |
FairSchedulerConfiguration |
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