org.apache.hadoop.hbase

Class PrivateCellUtil.EmptyByteBufferExtendedCell

java.lang.Object

org.apache.hadoop.hbase.ByteBufferExtendedCell

org.apache.hadoop.hbase.PrivateCellUtil.EmptyByteBufferExtendedCell

All Implemented Interfaces:

Cell, ExtendedCell, HeapSize, RawCell

Direct Known Subclasses:

PrivateCellUtil.FirstOnRowByteBufferExtendedCell, PrivateCellUtil.LastOnRowByteBufferExtendedCell

Enclosing class:

PrivateCellUtil

private abstract static class PrivateCellUtil.EmptyByteBufferExtendedCell
extends ByteBufferExtendedCell

These cells are used in reseeks/seeks to improve the read performance. They are not real cells that are returned back to the clients

Nested Class Summary

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

Cell.Type

Field Summary

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

Modifier	Constructor and Description
private	EmptyByteBufferExtendedCell()

Method Summary

Modifier and Type	Method and Description
byte[]	getFamilyArray() Contiguous bytes composed of legal HDFS filename characters which may start at any index in the containing array.
ByteBuffer	getFamilyByteBuffer()
byte	getFamilyLength()
int	getFamilyOffset()
int	getFamilyPosition()
byte[]	getQualifierArray() Contiguous raw bytes that may start at any index in the containing array.
ByteBuffer	getQualifierByteBuffer()
int	getQualifierLength()
int	getQualifierOffset()
int	getQualifierPosition()
byte[]	getRowArray() Contiguous raw bytes that may start at any index in the containing array.
ByteBuffer	getRowByteBuffer()
short	getRowLength()
int	getRowOffset()
int	getRowPosition()
long	getSequenceId() A region-specific unique monotonically increasing sequence ID given to each Cell.
byte[]	getTagsArray() Contiguous raw bytes representing tags that may start at any index in the containing array.
ByteBuffer	getTagsByteBuffer()
int	getTagsLength() HBase internally uses 2 bytes to store tags length in Cell.
int	getTagsOffset()
int	getTagsPosition()
byte[]	getValueArray() Contiguous raw bytes that may start at any index in the containing array.
ByteBuffer	getValueByteBuffer()
int	getValueLength()
int	getValueOffset()
int	getValuePosition()
void	setSequenceId(long seqId) Sets with the given seqId.
void	setTimestamp(byte[] ts) Sets with the given timestamp.
void	setTimestamp(long ts) Sets with the given timestamp.

Methods inherited from class java.lang.Object

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

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

deepClone, getChunkId, getSerializedSize, getSerializedSize, getTypeByte, write, write

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

checkForTagsLength, cloneTags, getTag, getTags

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

getTimestamp, getType

Methods inherited from interface org.apache.hadoop.hbase.io.HeapSize

heapSize

Constructor Detail

EmptyByteBufferExtendedCell

private EmptyByteBufferExtendedCell()

Method Detail

setSequenceId

public void setSequenceId(long seqId)

Description copied from interface: ExtendedCell

Sets with the given seqId.

Parameters:

seqId - sequence ID

setTimestamp

public void setTimestamp(long ts)

Description copied from interface: ExtendedCell

Sets with the given timestamp.

Parameters:

ts - timestamp

setTimestamp

public void setTimestamp(byte[] ts)

Description copied from interface: ExtendedCell

Sets with the given timestamp.

Parameters:

ts - buffer containing the timestamp value

getRowArray

public byte[] getRowArray()

Description copied from interface: Cell

Contiguous raw bytes that may start at any index in the containing array. Max length is Short.MAX_VALUE which is 32,767 bytes.

Returns:

The array containing the row bytes.

getRowOffset

public int getRowOffset()

Returns:

Array index of first row byte

getRowLength

public short getRowLength()

Returns:

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

getFamilyArray

public byte[] getFamilyArray()

Description copied from interface: Cell

Contiguous bytes composed of legal HDFS filename characters which may start at any index in the containing array. Max length is Byte.MAX_VALUE, which is 127 bytes.

Returns:

the array containing the family bytes.

getFamilyOffset

public int getFamilyOffset()

Returns:

Array index of first family byte

getFamilyLength

public byte getFamilyLength()

Returns:

Number of family bytes. Must be < familyArray.length - offset.

getQualifierArray

public byte[] getQualifierArray()

Description copied from interface: Cell

Contiguous raw bytes that may start at any index in the containing array.

Returns:

The array containing the qualifier bytes.

getQualifierOffset

public int getQualifierOffset()

Returns:

Array index of first qualifier byte

getQualifierLength

public int getQualifierLength()

Returns:

Number of qualifier bytes. Must be < qualifierArray.length - offset.

getSequenceId

public long getSequenceId()

Description copied from interface: ExtendedCell

A region-specific unique monotonically increasing sequence ID given to each Cell. It always exists for cells in the memstore but is not retained forever. It will be kept for HConstants.KEEP_SEQID_PERIOD days, but generally becomes irrelevant after the cell's row is no longer involved in any operations that require strict consistency.

Returns:

seqId (always > 0 if exists), or 0 if it no longer exists

getValueArray

public byte[] getValueArray()

Description copied from interface: Cell

Contiguous raw bytes that may start at any index in the containing array. Max length is Integer.MAX_VALUE which is 2,147,483,647 bytes.

Returns:

The array containing the value bytes.

getValueOffset

public int getValueOffset()

Returns:

Array index of first value byte

getValueLength

public int getValueLength()

Returns:

Number of value bytes. Must be < valueArray.length - offset.

getTagsArray

public byte[] getTagsArray()

Description copied from interface: ExtendedCell

Contiguous raw bytes representing tags that may start at any index in the containing array.

Returns:

the tags byte array

getTagsOffset

public int getTagsOffset()

Returns:

the first offset where the tags start in the Cell

getTagsLength

public int getTagsLength()

Description copied from interface: ExtendedCell

HBase internally uses 2 bytes to store tags length in Cell. As the tags length is always a non-negative number, to make good use of the sign bit, the max of tags length is defined 2 * Short.MAX_VALUE + 1 = 65535. As a result, the return type is int, because a short is not capable of handling that. Please note that even if the return type is int, the max tags length is far less than Integer.MAX_VALUE.

Returns:

the total length of the tags in the Cell.

getRowByteBuffer

public ByteBuffer getRowByteBuffer()

Specified by:

getRowByteBuffer in class ByteBufferExtendedCell

Returns:

The ByteBuffer containing the row bytes.

getRowPosition

public int getRowPosition()

Specified by:

getRowPosition in class ByteBufferExtendedCell

Returns:

Position in the ByteBuffer where row bytes start

getFamilyByteBuffer

public ByteBuffer getFamilyByteBuffer()

Specified by:

getFamilyByteBuffer in class ByteBufferExtendedCell

Returns:

The ByteBuffer containing the column family bytes.

getFamilyPosition

public int getFamilyPosition()

Specified by:

getFamilyPosition in class ByteBufferExtendedCell

Returns:

Position in the ByteBuffer where column family bytes start

getQualifierByteBuffer

public ByteBuffer getQualifierByteBuffer()

Specified by:

getQualifierByteBuffer in class ByteBufferExtendedCell

Returns:

The ByteBuffer containing the column qualifier bytes.

getQualifierPosition

public int getQualifierPosition()

Specified by:

getQualifierPosition in class ByteBufferExtendedCell

Returns:

Position in the ByteBuffer where column qualifier bytes start

getTagsByteBuffer

public ByteBuffer getTagsByteBuffer()

Specified by:

getTagsByteBuffer in class ByteBufferExtendedCell

Returns:

The ByteBuffer containing the tag bytes.

getTagsPosition

public int getTagsPosition()

Specified by:

getTagsPosition in class ByteBufferExtendedCell

Returns:

Position in the ByteBuffer where tag bytes start

getValueByteBuffer

public ByteBuffer getValueByteBuffer()

Specified by:

getValueByteBuffer in class ByteBufferExtendedCell

Returns:

The ByteBuffer containing the value bytes.

getValuePosition

public int getValuePosition()

Specified by:

getValuePosition in class ByteBufferExtendedCell

Returns:

Position in the ByteBuffer where value bytes start