org.apache.cassandra.cache

Class RowCacheKey

java.lang.Object

org.apache.cassandra.cache.RowCacheKey

All Implemented Interfaces:

java.lang.Comparable<RowCacheKey>, CacheKey, IMeasurableMemory

public class RowCacheKey
extends java.lang.Object
implements CacheKey, java.lang.Comparable<RowCacheKey>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.cache.CacheKey

CacheKey.PathInfo

Field Summary

Fields

Modifier and Type	Field and Description
java.util.UUID	cfId
byte[]	key

Constructor Summary

Constructors

Constructor and Description
RowCacheKey(java.util.UUID cfId, java.nio.ByteBuffer key)
RowCacheKey(java.util.UUID cfId, DecoratedKey key)

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(RowCacheKey otherKey)
boolean	equals(java.lang.Object o)
CacheKey.PathInfo	getPathInfo()
int	hashCode()
java.lang.String	toString()
long	unsharedHeapSize()

Methods inherited from class java.lang.Object

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

Field Detail

cfId

public final java.util.UUID cfId

key

public final byte[] key

Constructor Detail

RowCacheKey

public RowCacheKey(java.util.UUID cfId,
           DecoratedKey key)

RowCacheKey

public RowCacheKey(java.util.UUID cfId,
           java.nio.ByteBuffer key)

Method Detail

getPathInfo

public CacheKey.PathInfo getPathInfo()

Specified by:

getPathInfo in interface CacheKey

Returns:

The keyspace and ColumnFamily names to which this key belongs

unsharedHeapSize

public long unsharedHeapSize()

Specified by:

unsharedHeapSize in interface IMeasurableMemory

Returns:

the amount of on-heap memory retained by the object that might be reclaimed if the object were reclaimed, i.e. it should try to exclude globally cached data where possible, or counting portions of arrays that are referenced by the object but used by other objects only (e.g. slabbed byte-buffers), etc.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

compareTo

public int compareTo(RowCacheKey otherKey)

Specified by:

compareTo in interface java.lang.Comparable<RowCacheKey>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object