org.apache.hadoop.hbase

Class SizeCachedByteBufferKeyValue

java.lang.Object

org.apache.hadoop.hbase.ByteBufferExtendedCell

org.apache.hadoop.hbase.ByteBufferKeyValue

org.apache.hadoop.hbase.SizeCachedByteBufferKeyValue

All Implemented Interfaces:

Cell, ExtendedCell, HeapSize, RawCell

@InterfaceAudience.Private
public class SizeCachedByteBufferKeyValue
extends ByteBufferKeyValue

This Cell is an implementation of ByteBufferExtendedCell where the data resides in off heap/ on heap ByteBuffer

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.Cell

Cell.Type

Field Summary

Fields

Modifier and Type	Field and Description
static int	FIXED_OVERHEAD
private int	keyLen
private short	rowLen

Fields inherited from class org.apache.hadoop.hbase.ByteBufferKeyValue

buf, length, offset

Fields inherited from interface org.apache.hadoop.hbase.ExtendedCell

CELL_NOT_BASED_ON_CHUNK

Fields inherited from interface org.apache.hadoop.hbase.RawCell

MAX_TAGS_LENGTH

Constructor Summary

Constructors

Constructor and Description
SizeCachedByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId, int keyLen)
SizeCachedByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId, int keyLen, short rowLen)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) Needed doing 'contains' on List.
int	getKeyLength()
short	getRowLength() Returns Number of row bytes.
int	getSerializedSize() Override by just returning the length for saving cost of method dispatching.
int	hashCode() In line with ByteBufferKeyValue.equals(Object), only uses the key portion, not the value.
long	heapSize() Return the approximate 'exclusive deep size' of implementing object.

Methods inherited from class org.apache.hadoop.hbase.ByteBufferKeyValue

deepClone, getBuffer, getFamilyArray, getFamilyByteBuffer, getFamilyLength, getFamilyLength, getFamilyLengthPosition, getFamilyLengthPosition, getFamilyOffset, getFamilyPosition, getFamilyPosition, getOffset, getQualifierArray, getQualifierByteBuffer, getQualifierLength, getQualifierLength, getQualifierOffset, getQualifierPosition, getQualifierPosition, getRowArray, getRowByteBuffer, getRowOffset, getRowPosition, getSequenceId, getSerializedSize, getTagsArray, getTagsByteBuffer, getTagsLength, getTagsOffset, getTagsPosition, getTimestamp, getTimestamp, getTypeByte, getTypeByte, getValueArray, getValueByteBuffer, getValueLength, getValueOffset, getValuePosition, setSequenceId, setTimestamp, setTimestamp, toString, write, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.hadoop.hbase.ExtendedCell

getChunkId

Methods inherited from interface org.apache.hadoop.hbase.RawCell

checkForTagsLength, cloneTags, createCell, getTag, getTags

Methods inherited from interface org.apache.hadoop.hbase.Cell

getType

Field Detail

FIXED_OVERHEAD

public static final int FIXED_OVERHEAD

See Also:

Constant Field Values

rowLen

private short rowLen

keyLen

private int keyLen

Constructor Detail

SizeCachedByteBufferKeyValue

public SizeCachedByteBufferKeyValue(ByteBuffer buf,
                                    int offset,
                                    int length,
                                    long seqId,
                                    int keyLen)

SizeCachedByteBufferKeyValue

public SizeCachedByteBufferKeyValue(ByteBuffer buf,
                                    int offset,
                                    int length,
                                    long seqId,
                                    int keyLen,
                                    short rowLen)

Method Detail

getRowLength

public short getRowLength()

Description copied from interface: Cell

Returns Number of row bytes. Must be < rowArray.length - offset.

Specified by:

getRowLength in interface Cell

Overrides:

getRowLength in class ByteBufferKeyValue

getKeyLength

public int getKeyLength()

Overrides:

getKeyLength in class ByteBufferKeyValue

heapSize

public long heapSize()

Description copied from interface: HeapSize

Return the approximate 'exclusive deep size' of implementing object. Includes count of payload and hosting object sizings.

Specified by:

heapSize in interface HeapSize

Overrides:

heapSize in class ByteBufferKeyValue

getSerializedSize

public int getSerializedSize()

Override by just returning the length for saving cost of method dispatching. If not, it will call ExtendedCell.getSerializedSize() firstly, then forward to KeyValue.getSerializedSize(boolean). (See HBASE-21657)

Specified by:

getSerializedSize in interface Cell

Specified by:

getSerializedSize in interface ExtendedCell

Overrides:

getSerializedSize in class ByteBufferKeyValue

equals

public boolean equals(Object other)

Description copied from class: ByteBufferKeyValue

Needed doing 'contains' on List. Only compares the key portion, not the value.

Overrides:

equals in class ByteBufferKeyValue

hashCode

public int hashCode()

Description copied from class: ByteBufferKeyValue

In line with ByteBufferKeyValue.equals(Object), only uses the key portion, not the value.

Overrides:

hashCode in class ByteBufferKeyValue