org.apache.hadoop.hbase.io.hfile

Class BlockCacheKey

java.lang.Object

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

All Implemented Interfaces:

Serializable, HeapSize

@InterfaceAudience.Private
public class BlockCacheKey
extends Object
implements HeapSize, Serializable

Cache Key for use with implementations of BlockCache

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BlockCacheKey(String file, long offset) Construct a new BlockCacheKey
BlockCacheKey(String file, long offset, DataBlockEncoding encoding, BlockType blockType)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
DataBlockEncoding	getDataBlockEncoding()
String	getHfileName()
long	getOffset()
int	hashCode()
long	heapSize() Strings have two bytes per character due to default Java Unicode encoding (hence length times 2).
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockCacheKey

public BlockCacheKey(String file,
             long offset,
             DataBlockEncoding encoding,
             BlockType blockType)

BlockCacheKey

public BlockCacheKey(String file,
             long offset)

Construct a new BlockCacheKey

Parameters:

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

offset - Offset of the block into the file

Method Detail

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

Returns:

Approximate 'exclusive deep size' of implementing object. Includes count of payload and hosting object sizings.

getHfileName

public String getHfileName()

Returns:

The hfileName portion of this cache key

getDataBlockEncoding

public DataBlockEncoding getDataBlockEncoding()

getOffset

public long getOffset()