| Package | Description |
|---|---|
| org.apache.hadoop.conf |
Configuration of system parameters.
|
| org.apache.hadoop.crypto | |
| org.apache.hadoop.crypto.key.kms | |
| org.apache.hadoop.fs |
An abstract file system API.
|
| org.apache.hadoop.fs.permission |
This package provides support for HDFS permission and ACL.
|
| org.apache.hadoop.fs.store |
This package is for classes to be shared across object stores; for internal
use within the hadoop-* modules only.
|
| 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.file.tfile | |
| 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.ipc.internal |
IPC internal classes not for any use by libraries outside
the apache hadoop source tree.
|
| org.apache.hadoop.net |
Network-related classes.
|
| org.apache.hadoop.security | |
| org.apache.hadoop.security.authorize |
Support for service-level authorization.
|
| org.apache.hadoop.security.token |
Support for delegation tokens.
|
| org.apache.hadoop.security.token.delegation |
ZooKeeper secret manager for TokenIdentifiers and DelegationKeys.
|
| org.apache.hadoop.security.token.delegation.web | |
| org.apache.hadoop.util |
Common utilities.
|
| org.apache.hadoop.util.bloom |
| Class | Description |
|---|---|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| ByteBufferPool |
| Class | Description |
|---|---|
| Text |
This class stores text using standard UTF8 encoding.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| ByteBufferPool | |
| MD5Hash |
A Writable for MD5 hash values.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| 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.
|
| BinaryComparable |
Interface supported by
WritableComparable
types supporting ordering/permutation by a representative set of bytes. |
| BooleanWritable |
A WritableComparable for booleans.
|
| ByteBufferPool | |
| BytesWritable |
A byte sequence that is usable as a key or value.
|
| ByteWritable |
A WritableComparable for a single byte.
|
| DataOutputBuffer |
A reusable
DataOutput implementation that writes to an in-memory
buffer. |
| DoubleWritable |
Writable for Double values.
|
| ElasticByteBufferPool |
This is a simple ByteBufferPool which just creates ByteBuffers as needed.
|
| ElasticByteBufferPool.Key | |
| FloatWritable |
A WritableComparable for floats.
|
| IntWritable |
A WritableComparable for ints.
|
| LongWritable |
A WritableComparable for longs.
|
| LongWritable.Comparator |
A Comparator optimized for LongWritable.
|
| MapFile |
A file-based map from keys to values.
|
| MapFile.Reader |
Provide access to an existing map.
|
| MapFile.Reader.Option | |
| MapFile.Writer |
Writes a new map.
|
| MapFile.Writer.Option | |
| MapWritable |
A Writable Map.
|
| MD5Hash |
A Writable for MD5 hash values.
|
| NullWritable |
Singleton Writable with no data.
|
| ObjectWritable |
A polymorphic Writable that writes an instance with it's class name.
|
| OutputBuffer |
A reusable
OutputStream implementation that writes to an in-memory
buffer. |
| RawComparator |
A
Comparator that operates directly on byte representations of
objects. |
| ReadaheadPool |
Manages a pool of threads which can issue readahead requests on file descriptors.
|
| ReadaheadPool.ReadaheadRequest |
An outstanding readahead request that has been submitted to
the pool.
|
| SequenceFile.CompressionType |
The compression type used to compress key/value pairs in the
SequenceFile. |
| SequenceFile.Metadata |
The class encapsulating with the metadata of a file.
|
| SequenceFile.Reader |
Reads key/value pairs from a sequence-format file.
|
| SequenceFile.Reader.Option |
A tag interface for all of the Reader options
|
| SequenceFile.Sorter.RawKeyValueIterator |
The interface to iterate over raw keys/values of SequenceFiles.
|
| SequenceFile.Sorter.SegmentDescriptor |
This class defines a merge segment.
|
| SequenceFile.ValueBytes |
The interface to 'raw' values of SequenceFiles.
|
| SequenceFile.Writer |
Write key/value pairs to a sequence-format file.
|
| SequenceFile.Writer.Option | |
| ShortWritable |
A WritableComparable for shorts.
|
| SortedMapWritable |
A Writable SortedMap.
|
| Stringifier |
Stringifier interface offers two methods to convert an object
to a string representation and restore the object given its
string representation.
|
| Text |
This class stores text using standard UTF8 encoding.
|
| UTF8 |
Deprecated.
replaced by Text
|
| VIntWritable |
A WritableComparable for integer values stored in variable-length format.
|
| VLongWritable |
A WritableComparable for longs in a variable-length format.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| WritableComparable |
A
Writable which is also Comparable. |
| WritableComparator |
A Comparator for
WritableComparables. |
| WritableFactory |
A factory for a class of Writable.
|
| Class | Description |
|---|---|
| BytesWritable |
A byte sequence that is usable as a key or value.
|
| Class | Description |
|---|---|
| RawComparator |
A
Comparator that operates directly on byte representations of
objects. |
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Text |
This class stores text using standard UTF8 encoding.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Text |
This class stores text using standard UTF8 encoding.
|
| Class | Description |
|---|---|
| LongWritable |
A WritableComparable for longs.
|
| Class | Description |
|---|---|
| Text |
This class stores text using standard UTF8 encoding.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Text |
This class stores text using standard UTF8 encoding.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Text |
This class stores text using standard UTF8 encoding.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Text |
This class stores text using standard UTF8 encoding.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| IntWritable |
A WritableComparable for ints.
|
| Text |
This class stores text using standard UTF8 encoding.
|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| Class | Description |
|---|---|
| Writable |
A serializable object which implements a simple, efficient, serialization
protocol, based on
DataInput and DataOutput. |
| WritableComparable |
A
Writable which is also Comparable. |
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