org.apache.cassandra.cache
Class ConcurrentLinkedHashCache<K,V>

java.lang.Object
  org.apache.cassandra.cache.ConcurrentLinkedHashCache<K,V>

All Implemented Interfaces:

ICache<K,V>

public class ConcurrentLinkedHashCache<K,V>
extends java.lang.Object
implements ICache<K,V>

Wrapper so CLHM can implement ICache interface. (this is what you get for making library classes final.)

Field Summary

static int

DEFAULT_CONCURENCY_LEVEL

Method Summary

long	capacity()
void	clear()
boolean	containsKey(K key)
static <K,V> ConcurrentLinkedHashCache<K,V>	create(long weightedCapacity)
static <K,V> ConcurrentLinkedHashCache<K,V>	create(long weightedCapacity, com.googlecode.concurrentlinkedhashmap.EntryWeigher<K,V> entryWeiger) Initialize a cache with initial capacity with weightedCapacity
V	get(K key)
java.util.Set<K>	hotKeySet(int n)
boolean	isEmpty()
boolean	isPutCopying()
java.util.Set<K>	keySet()
void	put(K key, V value)
boolean	putIfAbsent(K key, V value)
void	remove(K key)
boolean	replace(K key, V old, V value)
void	setCapacity(long capacity)
int	size()
long	weightedSize()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CONCURENCY_LEVEL

public static final int DEFAULT_CONCURENCY_LEVEL

See Also:

Constant Field Values

Method Detail

create

public static <K,V> ConcurrentLinkedHashCache<K,V> create(long weightedCapacity,
                                                          com.googlecode.concurrentlinkedhashmap.EntryWeigher<K,V> entryWeiger)

Initialize a cache with initial capacity with weightedCapacity

create

public static <K,V> ConcurrentLinkedHashCache<K,V> create(long weightedCapacity)

capacity

public long capacity()

Specified by:

capacity in interface ICache<K,V>

setCapacity

public void setCapacity(long capacity)

Specified by:

setCapacity in interface ICache<K,V>

isEmpty

public boolean isEmpty()

size

public int size()

Specified by:

size in interface ICache<K,V>

weightedSize

public long weightedSize()

Specified by:

weightedSize in interface ICache<K,V>

clear

public void clear()

Specified by:

clear in interface ICache<K,V>

get

public V get(K key)

Specified by:

get in interface ICache<K,V>

put

public void put(K key,
                V value)

Specified by:

put in interface ICache<K,V>

putIfAbsent

public boolean putIfAbsent(K key,
                           V value)

Specified by:

putIfAbsent in interface ICache<K,V>

replace

public boolean replace(K key,
                       V old,
                       V value)

Specified by:

replace in interface ICache<K,V>

remove

public void remove(K key)

Specified by:

remove in interface ICache<K,V>

keySet

public java.util.Set<K> keySet()

Specified by:

keySet in interface ICache<K,V>

hotKeySet

public java.util.Set<K> hotKeySet(int n)

Specified by:

hotKeySet in interface ICache<K,V>

containsKey

public boolean containsKey(K key)

Specified by:

containsKey in interface ICache<K,V>

isPutCopying

public boolean isPutCopying()

Specified by:

isPutCopying in interface ICache<K,V>

Returns:

true if the cache implementation inherently copies the cached values; otherwise, the caller should copy manually before caching shared values like Thrift ByteBuffers.