org.conqat.lib.commons.cache4j.backend

Enum ECachingStrategy

java.lang.Object

java.lang.Enum<ECachingStrategy>

org.conqat.lib.commons.cache4j.backend.ECachingStrategy

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<ECachingStrategy>

public enum ECachingStrategy
extends java.lang.Enum<ECachingStrategy>

Enumeration of supported caching strategies.

Enum Constant Summary

Enum Constants

Enum Constant and Description
LRU Last recently used caching strategy.
MEMORY Memory sensitive caching using SoftReferences.
OFF Performs no caching at all.
SINGLE Caches exactly one element (basically the same as an LRU cache with size 1.
UNLIMITED Unlimited caching, i.e.

Method Summary

Modifier and Type	Method and Description
<K,V> ICacheBackend<K,V>	getBackend(int parameter) Returns the cache backend for the strategy (factory method).
static ECachingStrategy	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static ECachingStrategy[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

OFF

public static final ECachingStrategy OFF

Performs no caching at all.

SINGLE

public static final ECachingStrategy SINGLE

Caches exactly one element (basically the same as an LRU cache with size 1.

LRU

public static final ECachingStrategy LRU

Last recently used caching strategy. The parameter denotes the maximal number of elements stored.

MEMORY

public static final ECachingStrategy MEMORY

Memory sensitive caching using SoftReferences. This allows the cache to keep elements as long as memory is available, but free memory when requested by the garbage collector.

UNLIMITED

public static final ECachingStrategy UNLIMITED

Unlimited caching, i.e. the cache never discard data. This can lead to situations where the memory is exceeded.

Method Detail

values

public static ECachingStrategy[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ECachingStrategy c : ECachingStrategy.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ECachingStrategy valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

getBackend

public <K,V> ICacheBackend<K,V> getBackend(int parameter)

Returns the cache backend for the strategy (factory method).

Parameters:

parameter - the parameter used for the caching strategy. This is ignored by those strategies that are not parameterizable.