Package org.apache.hadoop.hbase.io.hfile

Class BlockCacheKey

java.lang.Object

org.apache.hadoop.hbase.io.hfile.BlockCacheKey

All Implemented Interfaces:

Serializable, HeapSize

@Private
public class BlockCacheKey
extends Object
implements HeapSize, Serializable

Cache Key for use with implementations of BlockCache

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private BlockType	blockType
static final long	FIXED_OVERHEAD
private final String	hfileName
private final boolean	isPrimaryReplicaBlock
private final long	offset
private static final long	serialVersionUID

Constructor Summary

Constructors

Constructor	Description
BlockCacheKey(String hfileName, long offset)	Construct a new BlockCacheKey
BlockCacheKey(String hfileName, long offset, boolean isPrimaryReplica, BlockType blockType)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
BlockType	getBlockType()
String	getHfileName()	Returns The hfileName portion of this cache key
long	getOffset()
int	hashCode()
long	heapSize()	Strings have two bytes per character due to default Java Unicode encoding (hence length times 2).
boolean	isPrimary()
void	setBlockType(BlockType blockType)
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

hfileName

private final String hfileName

offset

private final long offset

blockType

private BlockType blockType

isPrimaryReplicaBlock

private final boolean isPrimaryReplicaBlock

FIXED_OVERHEAD

public static final long FIXED_OVERHEAD

Constructor Details

BlockCacheKey

public BlockCacheKey(String hfileName,
 long offset)

Construct a new BlockCacheKey

Parameters:

hfileName - The name of the HFile this block belongs to.

offset - Offset of the block into the file

BlockCacheKey

public BlockCacheKey(String hfileName,
 long offset,
 boolean isPrimaryReplica,
 BlockType blockType)

Method Details

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

heapSize

public long heapSize()

Strings have two bytes per character due to default Java Unicode encoding (hence length times 2).

Specified by:

heapSize in interface HeapSize

getHfileName

public String getHfileName()

Returns The hfileName portion of this cache key

isPrimary

public boolean isPrimary()

getOffset

public long getOffset()

getBlockType

public BlockType getBlockType()

setBlockType

public void setBlockType(BlockType blockType)