org.mapdb

Class Store.Cache.WeakSoftRef

java.lang.Object

org.mapdb.Store.Cache

org.mapdb.Store.Cache.WeakSoftRef

Enclosing class:

Store.Cache

public static class Store.Cache.WeakSoftRef
extends Store.Cache

Instance cache which uses SoftReference or WeakReference Items can be removed from cache by Garbage Collector if

Author:

Jan Kotek

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static interface	Store.Cache.WeakSoftRef.CacheItem
protected static class	Store.Cache.WeakSoftRef.CacheSoftItem<A>
protected static class	Store.Cache.WeakSoftRef.CacheWeakItem<A>

Nested classes/interfaces inherited from class org.mapdb.Store.Cache

Store.Cache.HardRef, Store.Cache.HashTable, Store.Cache.LRU, Store.Cache.WeakSoftRef

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	CHECK_EVERY_N
protected int	counter
protected ScheduledExecutorService	executor
protected long	executorScheduledRate
protected Store.LongObjectMap<Store.Cache.WeakSoftRef.CacheItem>	items
protected ReferenceQueue<Object>	queue
protected boolean	useWeakRef

Fields inherited from class org.mapdb.Store.Cache

cacheHitCounter, cacheMissCounter, lock, NULL

Constructor Summary

Constructors

Constructor and Description
Store.Cache.WeakSoftRef(boolean useWeakRef, boolean disableLocks, ScheduledExecutorService executor, long executorScheduledRate)

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
void	close()
protected void	flushGCed()
protected void	flushGCedLocked()
Object	get(long recid)
Store.Cache	newCacheForOtherSegment()
void	put(long recid, Object item)

Methods inherited from class org.mapdb.Store.Cache

metricsCacheHit, metricsCacheMiss

Methods inherited from class java.lang.Object

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

Field Detail

queue

protected ReferenceQueue<Object> queue

items

protected Store.LongObjectMap<Store.Cache.WeakSoftRef.CacheItem> items

CHECK_EVERY_N

protected static final int CHECK_EVERY_N

See Also:

Constant Field Values

counter

protected int counter

executor

protected final ScheduledExecutorService executor

useWeakRef

protected final boolean useWeakRef

executorScheduledRate

protected final long executorScheduledRate

Constructor Detail

Store.Cache.WeakSoftRef

public Store.Cache.WeakSoftRef(boolean useWeakRef,
                       boolean disableLocks,
                       ScheduledExecutorService executor,
                       long executorScheduledRate)

Method Detail

get

public Object get(long recid)

Specified by:

get in class Store.Cache

put

public void put(long recid,
       Object item)

Specified by:

put in class Store.Cache

clear

public void clear()

Specified by:

clear in class Store.Cache

close

public void close()

Specified by:

close in class Store.Cache

newCacheForOtherSegment

public Store.Cache newCacheForOtherSegment()

Specified by:

newCacheForOtherSegment in class Store.Cache

flushGCed

protected void flushGCed()

flushGCedLocked

protected void flushGCedLocked()