Package | Description |
---|---|
org.apache.hadoop.examples |
Hadoop example code.
|
org.apache.hadoop.examples.dancing |
This package is a distributed implementation of Knuth's dancing links
algorithm that can run under Hadoop.
|
org.apache.hadoop.examples.pi |
This package consists of a map/reduce application,
distbbp,
which computes exact binary digits of the mathematical constant π.
|
org.apache.hadoop.hdfs |
A distributed implementation of
FileSystem . |
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.mapred | |
org.apache.hadoop.mapred.join | |
org.apache.hadoop.mapred.lib | |
org.apache.hadoop.mapred.lib.aggregate | |
org.apache.hadoop.mapreduce | |
org.apache.hadoop.mapreduce.lib.aggregate | |
org.apache.hadoop.mapreduce.lib.join | |
org.apache.hadoop.mapreduce.lib.output | |
org.apache.hadoop.mapreduce.lib.partition | |
org.apache.hadoop.record |
(DEPRECATED) 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.tools |
Command-line tools for MapReduce.
|
org.apache.hadoop.typedbytes |
Typed bytes are sequences of bytes in which the first byte is a type code.
|
org.apache.hadoop.util.bloom |
Modifier and Type | Class and Description |
---|---|
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 | Method and Description |
---|---|
void |
DistributedPentomino.PentMap.map(WritableComparable<?> key,
Text value,
Mapper.Context context)
Break the prefix string into moves (a sequence of integer row ids that
will be selected for each column in order).
|
Modifier and Type | Class and Description |
---|---|
class |
SummationWritable
A Writable class for Summation
|
Modifier and Type | Class and Description |
---|---|
class |
DeprecatedUTF8
A simple wrapper around
UTF8 . |
Modifier and Type | Class and Description |
---|---|
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 |
DoubleWritable
Writable for Double values.
|
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 |
ShortWritable
A WritableComparable for shorts.
|
class |
Text
This class stores text using standard UTF8 encoding.
|
class |
UTF8
Deprecated.
replaced by Text
|
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 |
---|---|
WritableComparable |
SortedMapWritable.firstKey() |
WritableComparable |
SetFile.Reader.get(WritableComparable key)
Read the matching key from a set into
key . |
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.
|
WritableComparable |
SortedMapWritable.lastKey() |
WritableComparable |
MapFile.Reader.midKey()
Get the key at approximately the middle of the file.
|
WritableComparable |
WritableComparator.newKey()
Construct a new
WritableComparable instance. |
Modifier and Type | Method and Description |
---|---|
Comparator<? super WritableComparable> |
SortedMapWritable.comparator() |
Set<Map.Entry<WritableComparable,Writable>> |
SortedMapWritable.entrySet() |
Class<? extends WritableComparable> |
WritableComparator.getKeyClass()
Returns the WritableComparable implementation class.
|
SortedMap<WritableComparable,Writable> |
SortedMapWritable.headMap(WritableComparable toKey) |
Set<WritableComparable> |
SortedMapWritable.keySet() |
SortedMap<WritableComparable,Writable> |
SortedMapWritable.subMap(WritableComparable fromKey,
WritableComparable toKey) |
SortedMap<WritableComparable,Writable> |
SortedMapWritable.tailMap(WritableComparable fromKey) |
Modifier and Type | Method and Description |
---|---|
void |
SetFile.Writer.append(WritableComparable key)
Append a key to a set.
|
void |
BloomMapFile.Writer.append(WritableComparable key,
Writable val) |
void |
MapFile.Writer.append(WritableComparable key,
Writable val)
Append a key/value pair to the map.
|
int |
LongWritable.DecreasingComparator.compare(WritableComparable a,
WritableComparable b) |
int |
LongWritable.DecreasingComparator.compare(WritableComparable a,
WritableComparable b) |
int |
WritableComparator.compare(WritableComparable a,
WritableComparable b)
Compare two WritableComparables.
|
int |
WritableComparator.compare(WritableComparable a,
WritableComparable b)
Compare two WritableComparables.
|
void |
MapFile.Reader.finalKey(WritableComparable key)
Reads the final key from the file.
|
WritableComparable |
SetFile.Reader.get(WritableComparable key)
Read the matching key from a set into
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.
|
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.
|
SortedMap<WritableComparable,Writable> |
SortedMapWritable.headMap(WritableComparable toKey) |
boolean |
SetFile.Reader.next(WritableComparable key)
Read the next key in a set into
key . |
boolean |
MapFile.Reader.next(WritableComparable key,
Writable val)
Read the next key/value pair in the map into
key and
val . |
boolean |
BloomMapFile.Reader.probablyHasKey(WritableComparable key)
Checks if this MapFile has the indicated key.
|
Writable |
SortedMapWritable.put(WritableComparable key,
Writable value) |
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 |
SetFile.Reader.seek(WritableComparable key) |
SortedMap<WritableComparable,Writable> |
SortedMapWritable.subMap(WritableComparable fromKey,
WritableComparable toKey) |
SortedMap<WritableComparable,Writable> |
SortedMapWritable.subMap(WritableComparable fromKey,
WritableComparable toKey) |
SortedMap<WritableComparable,Writable> |
SortedMapWritable.tailMap(WritableComparable fromKey) |
Modifier and Type | Method and Description |
---|---|
static WritableComparator |
WritableComparator.get(Class<? extends WritableComparable> c)
Get a comparator for a
WritableComparable implementation. |
static MapFile.Writer.Option |
MapFile.Writer.keyClass(Class<? extends WritableComparable> value) |
void |
SortedMapWritable.putAll(Map<? extends WritableComparable,? extends Writable> t) |
Constructor and Description |
---|
BloomMapFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
Class valClass)
Deprecated.
|
BloomMapFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
Class<? extends Writable> valClass,
SequenceFile.CompressionType compress,
CompressionCodec codec,
Progressable progress)
Deprecated.
|
BloomMapFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
Class valClass,
SequenceFile.CompressionType compress)
Deprecated.
|
BloomMapFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
Class valClass,
SequenceFile.CompressionType compress,
Progressable progress)
Deprecated.
|
MapFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
Class valClass)
Deprecated.
Use Writer(Configuration, Path, Option...) instead.
|
MapFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
Class valClass,
SequenceFile.CompressionType compress)
Deprecated.
Use Writer(Configuration, Path, Option...) instead.
|
MapFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
Class valClass,
SequenceFile.CompressionType compress,
CompressionCodec codec,
Progressable progress)
Deprecated.
Use Writer(Configuration, Path, Option...) instead.
|
MapFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
Class valClass,
SequenceFile.CompressionType compress,
Progressable progress)
Deprecated.
Use Writer(Configuration, Path, Option...) instead.
|
SequenceFile.Sorter(FileSystem fs,
Class<? extends WritableComparable> keyClass,
Class valClass,
Configuration conf)
Sort and merge files containing the named classes.
|
SetFile.Writer(Configuration conf,
FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass,
SequenceFile.CompressionType compress)
Create a set naming the element class and compression type.
|
SetFile.Writer(FileSystem fs,
String dirName,
Class<? extends WritableComparable> keyClass)
Deprecated.
pass a Configuration too
|
WritableComparator(Class<? extends WritableComparable> keyClass)
Construct for a
WritableComparable implementation. |
WritableComparator(Class<? extends WritableComparable> keyClass,
boolean createInstances) |
Modifier and Type | Class and Description |
---|---|
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 |
---|---|
RecordWriter<WritableComparable,Writable> |
MapFileOutputFormat.getRecordWriter(FileSystem ignored,
JobConf job,
String name,
Progressable progress) |
static Class<? extends WritableComparable> |
SequenceFileAsBinaryOutputFormat.getSequenceFileOutputKeyClass(JobConf conf)
Get the key class for the
SequenceFile |
Modifier and Type | Interface and Description |
---|---|
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 |
CompositeInputFormat<K extends WritableComparable>
An InputFormat capable of performing joins over a set of data sources sorted
and partitioned the same way.
|
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 |
InnerJoinRecordReader<K extends WritableComparable>
Full inner join.
|
class |
JoinRecordReader<K extends WritableComparable>
Base class for Composite joins returning Tuples of arbitrary Writables.
|
class |
MultiFilterRecordReader<K extends WritableComparable,V extends Writable>
Base class for Composite join returning values derived from multiple
sources, but generally not tuples.
|
class |
OuterJoinRecordReader<K extends WritableComparable>
Full outer join.
|
class |
OverrideRecordReader<K extends WritableComparable,V extends Writable>
Prefer the "rightmost" data source for this key.
|
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 |
TotalOrderPartitioner<K extends WritableComparable<?>,V>
Partitioner effecting a total order by reading split points from
an externally generated source.
|
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 |
---|---|
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.
|
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 |
---|---|
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 |
CompositeInputFormat<K extends WritableComparable>
An InputFormat capable of performing joins over a set of data sources sorted
and partitioned the same way.
|
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 |
InnerJoinRecordReader<K extends WritableComparable<?>>
Full inner join.
|
class |
JoinRecordReader<K extends WritableComparable<?>>
Base class for Composite joins returning Tuples of arbitrary Writables.
|
class |
MultiFilterRecordReader<K extends WritableComparable<?>,V extends Writable>
Base class for Composite join returning values derived from multiple
sources, but generally not tuples.
|
class |
OuterJoinRecordReader<K extends WritableComparable<?>>
Full outer join.
|
class |
OverrideRecordReader<K extends WritableComparable<?>,V extends Writable>
Prefer the "rightmost" data source for this key.
|
class |
WrappedRecordReader<K extends WritableComparable<?>,U extends Writable>
Proxy class for a RecordReader participating in the join framework.
|
Modifier and Type | Field and Description |
---|---|
protected K |
CompositeRecordReader.key |
Modifier and Type | Field and Description |
---|---|
protected Class<? extends WritableComparable> |
CompositeRecordReader.keyclass |
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 WritableComparable> |
SequenceFileAsBinaryOutputFormat.getSequenceFileOutputKeyClass(JobContext job)
Get the key class for the
SequenceFile |
Modifier and Type | Class and Description |
---|---|
class |
TotalOrderPartitioner<K extends WritableComparable<?>,V>
Partitioner effecting a total order by reading split points from
an externally generated source.
|
Modifier and Type | Class and Description |
---|---|
class |
Record
Deprecated.
Replaced by Avro.
|
Constructor and Description |
---|
RecordComparator(Class<? extends WritableComparable> recordClass)
Deprecated.
Construct a raw
Record comparison implementation. |
Modifier and Type | Class and Description |
---|---|
class |
RecordTypeInfo
Deprecated.
Replaced by Avro.
|
Modifier and Type | Class and Description |
---|---|
static class |
Logalyzer.LogRegexMapper<K extends WritableComparable>
A
Mapper that extracts text matching a regular expression. |
Modifier and Type | Class and Description |
---|---|
class |
TypedBytesWritable
Writable for typed bytes.
|
Modifier and Type | Class and Description |
---|---|
class |
Key
The general behavior of a key that must be stored in a filter.
|
Copyright © 2013 Apache Software Foundation. All rights reserved.