jetbrains.exodus.core.dataStructures

Class ObjectCacheBase<K,V>

java.lang.Object

jetbrains.exodus.core.dataStructures.CacheHitRateable

jetbrains.exodus.core.dataStructures.ObjectCacheBase<K,V>

Direct Known Subclasses:

ConcurrentObjectCache, FakeObjectCache, ObjectCache, ObjectCacheDecorator, SoftObjectCacheBase

public abstract class ObjectCacheBase<K,V>
extends CacheHitRateable

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ObjectCacheBase.CriticalSection

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_SIZE
static int	MIN_SIZE
protected int	size

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ObjectCacheBase(int size)

Method Summary

Modifier and Type	Method and Description
void	adjustHitRate()
abstract V	cacheObject(K key, V x)
abstract void	clear()
boolean	containsKey(K key)
abstract int	count()
static java.lang.String	formatHitRate(float hitRate) Formats hit rate in percent with one decimal place.
V	get(K key)
abstract V	getObject(K key)
boolean	isCached(K key)
boolean	isEmpty()
abstract void	lock()
ObjectCacheBase.CriticalSection	newCriticalSection()
V	put(K key, V value)
abstract V	remove(K key)
int	size()
abstract V	tryKey(K key)
V	tryKeyLocked(K key)
abstract void	unlock()

Methods inherited from class jetbrains.exodus.core.dataStructures.CacheHitRateable

close, getAttempts, getCacheAdjuster, getHits, hitRate, incAttempts, incHits, setAttempts, setHits

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SIZE

public static final int DEFAULT_SIZE

See Also:

Constant Field Values

MIN_SIZE

public static final int MIN_SIZE

See Also:

Constant Field Values

size

protected final int size

Constructor Detail

ObjectCacheBase

protected ObjectCacheBase(int size)

Method Detail

isEmpty

public boolean isEmpty()

size

public int size()

containsKey

public boolean containsKey(K key)

get

public V get(K key)

isCached

public boolean isCached(K key)

put

public V put(K key,
             V value)

tryKeyLocked

public V tryKeyLocked(@NotNull
                      K key)

clear

public abstract void clear()

lock

public abstract void lock()

unlock

public abstract void unlock()

cacheObject

public abstract V cacheObject(@NotNull
                              K key,
                              @NotNull
                              V x)

remove

public abstract V remove(@NotNull
                         K key)

tryKey

public abstract V tryKey(@NotNull
                         K key)

getObject

public abstract V getObject(@NotNull
                            K key)

count

public abstract int count()

formatHitRate

public static java.lang.String formatHitRate(float hitRate)

Formats hit rate in percent with one decimal place.

Parameters:

hitRate - hit rate value in the interval [0..1]

adjustHitRate

public void adjustHitRate()

Overrides:

adjustHitRate in class CacheHitRateable

newCriticalSection

public ObjectCacheBase.CriticalSection newCriticalSection()