org.apache.hadoop.hbase.io.hfile

Class HFileContext

java.lang.Object

org.apache.hadoop.hbase.io.hfile.HFileContext

All Implemented Interfaces:

Cloneable, HeapSize

@InterfaceAudience.Private
public class HFileContext
extends Object
implements HeapSize, Cloneable

This carries the information on some of the meta data about the HFile. This meta data is used across the HFileWriter/Readers and the HFileBlocks. This helps to add new information to the HFile.

Field Summary

Fields

Modifier and Type	Field and Description
private int	blocksize Number of uncompressed bytes we allow per block.
private int	bytesPerChecksum the number of bytes per checksum value
private ChecksumType	checksumType the checksum type
private Compression.Algorithm	compressAlgo Compression algorithm used
private boolean	compressTags Whether tags to be compressed or not
private Encryption.Context	cryptoContext Encryption algorithm and key used
static int	DEFAULT_BYTES_PER_CHECKSUM
private DataBlockEncoding	encoding
private long	fileCreateTime
private String	hfileName
private boolean	includesMvcc Whether mvcc is to be included in the Read/Write
private boolean	includesTags Whether tags are to be included in the Read/Write
private boolean	usesHBaseChecksum Whether checksum is enabled or not

Constructor Summary

Constructors

Constructor and Description
HFileContext()
HFileContext(boolean useHBaseChecksum, boolean includesMvcc, boolean includesTags, Compression.Algorithm compressAlgo, boolean compressTags, ChecksumType checksumType, int bytesPerChecksum, int blockSize, DataBlockEncoding encoding, Encryption.Context cryptoContext, long fileCreateTime, String hfileName)
HFileContext(HFileContext context) Copy constructor

Method Summary

Modifier and Type	Method and Description
HFileContext	clone()
int	getBlocksize()
int	getBytesPerChecksum()
ChecksumType	getChecksumType()
Compression.Algorithm	getCompression()
DataBlockEncoding	getDataBlockEncoding()
Encryption.Context	getEncryptionContext()
long	getFileCreateTime()
String	getHFileName()
long	heapSize() HeapSize implementation NOTE : The heapsize should be altered as and when new state variable are added
boolean	isCompressedOrEncrypted()
boolean	isCompressTags()
boolean	isIncludesMvcc()
boolean	isIncludesTags()
boolean	isUseHBaseChecksum()
void	setCompressTags(boolean compressTags)
void	setEncryptionContext(Encryption.Context cryptoContext)
void	setFileCreateTime(long fileCreateTime)
void	setIncludesMvcc(boolean includesMvcc)
void	setIncludesTags(boolean includesTags)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BYTES_PER_CHECKSUM

public static final int DEFAULT_BYTES_PER_CHECKSUM

See Also:

Constant Field Values

usesHBaseChecksum

private boolean usesHBaseChecksum

Whether checksum is enabled or not

includesMvcc

private boolean includesMvcc

Whether mvcc is to be included in the Read/Write

includesTags

private boolean includesTags

Whether tags are to be included in the Read/Write

compressAlgo

private Compression.Algorithm compressAlgo

Compression algorithm used

compressTags

private boolean compressTags

Whether tags to be compressed or not

checksumType

private ChecksumType checksumType

the checksum type

bytesPerChecksum

private int bytesPerChecksum

the number of bytes per checksum value

blocksize

private int blocksize

Number of uncompressed bytes we allow per block.

encoding

private DataBlockEncoding encoding

cryptoContext

private Encryption.Context cryptoContext

Encryption algorithm and key used

fileCreateTime

private long fileCreateTime

hfileName

private String hfileName

Constructor Detail

HFileContext

public HFileContext()

HFileContext

public HFileContext(HFileContext context)

Copy constructor

Parameters:

context -

HFileContext

HFileContext(boolean useHBaseChecksum,
             boolean includesMvcc,
             boolean includesTags,
             Compression.Algorithm compressAlgo,
             boolean compressTags,
             ChecksumType checksumType,
             int bytesPerChecksum,
             int blockSize,
             DataBlockEncoding encoding,
             Encryption.Context cryptoContext,
             long fileCreateTime,
             String hfileName)

Method Detail

isCompressedOrEncrypted

public boolean isCompressedOrEncrypted()

Returns:

true when on-disk blocks from this file are compressed, and/or encrypted; false otherwise.

getCompression

public Compression.Algorithm getCompression()

isUseHBaseChecksum

public boolean isUseHBaseChecksum()

isIncludesMvcc

public boolean isIncludesMvcc()

setIncludesMvcc

public void setIncludesMvcc(boolean includesMvcc)

isIncludesTags

public boolean isIncludesTags()

setIncludesTags

public void setIncludesTags(boolean includesTags)

setFileCreateTime

public void setFileCreateTime(long fileCreateTime)

isCompressTags

public boolean isCompressTags()

setCompressTags

public void setCompressTags(boolean compressTags)

getChecksumType

public ChecksumType getChecksumType()

getBytesPerChecksum

public int getBytesPerChecksum()

getBlocksize

public int getBlocksize()

getFileCreateTime

public long getFileCreateTime()

getDataBlockEncoding

public DataBlockEncoding getDataBlockEncoding()

getEncryptionContext

public Encryption.Context getEncryptionContext()

setEncryptionContext

public void setEncryptionContext(Encryption.Context cryptoContext)

getHFileName

public String getHFileName()

heapSize

public long heapSize()

HeapSize implementation NOTE : The heapsize should be altered as and when new state variable are added

Specified by:

heapSize in interface HeapSize

Returns:

heap size of the HFileContext

clone

public HFileContext clone()

Overrides:

clone in class Object

toString

public String toString()

Overrides:

toString in class Object