com.helger.commons.cache.convert

Class SimpleCacheWithConversion<KEYTYPE,VALUETYPE>

java.lang.Object

com.helger.commons.cache.AbstractCache<KEYTYPE,VALUETYPE>

com.helger.commons.cache.convert.SimpleCacheWithConversion<KEYTYPE,VALUETYPE>

Type Parameters:

KEYTYPE - Cache key type

VALUETYPE - Cache value type

All Implemented Interfaces:

ISimpleCache<KEYTYPE,VALUETYPE>, SimpleCacheMBean, IHasSize, IHasName

Direct Known Subclasses:

SimpleCacheWithConversionAndMaxSize

@ThreadSafe
public class SimpleCacheWithConversion<KEYTYPE,VALUETYPE>
extends AbstractCache<KEYTYPE,VALUETYPE>

A special cache that can create the value to be cache automatically from the key.

Author:

Philip Helger

Field Summary

Fields inherited from class com.helger.commons.cache.AbstractCache

DEFAULT_JMX_ENABLED, m_aCacheAccessStats, m_aRWLock, STATISTICS_PREFIX

Constructor Summary

Constructors

Constructor and Description
SimpleCacheWithConversion(String sCacheName)

Method Summary

Modifier and Type	Method and Description
VALUETYPE	getFromCache(KEYTYPE aKey, IUnidirectionalConverter<KEYTYPE,VALUETYPE> aValueRetriever) Get the value from the cache.

Methods inherited from class com.helger.commons.cache.AbstractCache

clearCache, createCache, getFromCache, getFromCacheNoStats, getFromCacheNoStatsNotLocked, getFromCacheNotLocked, getName, isEmpty, isJMXEnabled, isNotEmpty, putInCache, putInCacheNotLocked, removeFromCache, setJMXEnabled, size, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleCacheWithConversion

public SimpleCacheWithConversion(@Nonnull
                                 String sCacheName)

Method Detail

getFromCache

@Nonnull
public final VALUETYPE getFromCache(@Nonnull
                                              KEYTYPE aKey,
                                              @Nonnull
                                              IUnidirectionalConverter<KEYTYPE,VALUETYPE> aValueRetriever)

Get the value from the cache. If no value is yet in the cache, the passed converter is used to get the value to cache.

Parameters:

aKey - The key of the cached object. May not be null.

aValueRetriever - The converter to be used to retrieve the object to cache. May not be null. This converter may not return null objects to cache!

Returns:

The cached value. Never null.