org.apache.hadoop.hbase.io.encoding

类 HFileBlockDefaultEncodingContext

java.lang.Object

org.apache.hadoop.hbase.io.encoding.HFileBlockDefaultEncodingContext

所有已实现的接口:

HFileBlockEncodingContext

@InterfaceAudience.Private
public class HFileBlockDefaultEncodingContext
extends Object
implements HFileBlockEncodingContext

A default implementation of HFileBlockEncodingContext. It will compress the data section as one continuous buffer.

另请参阅:

for the decompression part

构造器概要

构造器

构造器和说明
HFileBlockDefaultEncodingContext(DataBlockEncoding encoding, byte[] headerBytes, HFileContext fileContext)

方法概要

限定符和类型	方法和说明
void	close() Releases the compressor this writer uses to compress blocks into the compressor pool.
Bytes	compressAndEncrypt(byte[] data, int offset, int length)
BlockType	getBlockType()
DataBlockEncoding	getDataBlockEncoding()
EncodingState	getEncodingState()
HFileContext	getHFileContext()
TagCompressionContext	getTagCompressionContext()
void	postEncoding(BlockType blockType) Do any action that needs to be performed after the encoding.
void	prepareEncoding(DataOutputStream out) prepare to start a new encoding.
void	setEncodingState(EncodingState state) Sets the encoding state.
void	setTagCompressionContext(TagCompressionContext tagCompressionContext)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

HFileBlockDefaultEncodingContext

public HFileBlockDefaultEncodingContext(DataBlockEncoding encoding,
                                        byte[] headerBytes,
                                        HFileContext fileContext)

参数:

encoding - encoding used

headerBytes - dummy header bytes

fileContext - HFile meta data

方法详细资料

prepareEncoding

public void prepareEncoding(DataOutputStream out)
                     throws IOException

prepare to start a new encoding.

抛出:

IOException

postEncoding

public void postEncoding(BlockType blockType)
                  throws IOException

从接口复制的说明: HFileBlockEncodingContext

Do any action that needs to be performed after the encoding. Compression is also included if a non-null compression algorithm is used

指定者:

postEncoding 在接口中 HFileBlockEncodingContext

抛出:

IOException

compressAndEncrypt

public Bytes compressAndEncrypt(byte[] data,
                                int offset,
                                int length)
                         throws IOException

指定者:

compressAndEncrypt 在接口中 HFileBlockEncodingContext

参数:

data - encoded bytes with header

offset - the offset in encoded data to start at

length - the number of encoded bytes

返回:

Bytes with header which are ready to write out to disk. This is compressed and encrypted bytes applying the set compression algorithm and encryption. The bytes may be changed. If need a Bytes reference for later use, clone the bytes and use that. Null if the data doesn't need to be compressed and encrypted.

抛出:

IOException

getBlockType

public BlockType getBlockType()

指定者:

getBlockType 在接口中 HFileBlockEncodingContext

返回:

the block type after encoding

close

public void close()

Releases the compressor this writer uses to compress blocks into the compressor pool.

指定者:

close 在接口中 HFileBlockEncodingContext

getDataBlockEncoding

public DataBlockEncoding getDataBlockEncoding()

指定者:

getDataBlockEncoding 在接口中 HFileBlockEncodingContext

返回:

the DataBlockEncoding encoding used

getHFileContext

public HFileContext getHFileContext()

指定者:

getHFileContext 在接口中 HFileBlockEncodingContext

返回:

HFile context information

getTagCompressionContext

public TagCompressionContext getTagCompressionContext()

setTagCompressionContext

public void setTagCompressionContext(TagCompressionContext tagCompressionContext)

getEncodingState

public EncodingState getEncodingState()

指定者:

getEncodingState 在接口中 HFileBlockEncodingContext

返回:

the encoding state

setEncodingState

public void setEncodingState(EncodingState state)

从接口复制的说明: HFileBlockEncodingContext

Sets the encoding state.

指定者:

setEncodingState 在接口中 HFileBlockEncodingContext