Package org.eclipse.persistence.internal.identitymaps

Class SoftIdentityMap

java.lang.Object

org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap

org.eclipse.persistence.internal.identitymaps.FullIdentityMap

org.eclipse.persistence.internal.identitymaps.WeakIdentityMap

org.eclipse.persistence.internal.identitymaps.SoftIdentityMap

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, IdentityMap

public class SoftIdentityMap
extends WeakIdentityMap

Purpose: A SoftIdentityMap holds all objects referenced by the application. The soft identity map is similar to the weak identity map except for the fact that it allows only garbage collects when memory is low.

Responsibilities:

• Guarantees identity.
• Allows garbage collection when memory is low.

Since:

TopLink 11g

Author:

James Sutherland

See Also:

Serialized Form

Field Summary

Fields inherited from class org.eclipse.persistence.internal.identitymaps.WeakIdentityMap

cleanupCount, cleanupSize

Fields inherited from class org.eclipse.persistence.internal.identitymaps.FullIdentityMap

cacheKeys

Fields inherited from class org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap

descriptor, isIsolated, maxSize, session

Constructor Summary

Constructors

Constructor	Description
SoftIdentityMap(int size, ClassDescriptor descriptor, AbstractSession session, boolean isIsolated)

Method Summary

Modifier and Type	Method	Description
CacheKey	createCacheKey(java.lang.Object primaryKey, java.lang.Object object, java.lang.Object writeLockValue, long readTime)	Create the correct type of CacheKey for this map.

Methods inherited from class org.eclipse.persistence.internal.identitymaps.WeakIdentityMap

checkCleanup, cleanupDeadCacheKeys, putCacheKeyIfAbsent

Methods inherited from class org.eclipse.persistence.internal.identitymaps.FullIdentityMap

clone, cloneKeys, collectLocks, elements, getCacheKey, getCacheKeys, getSize, getSize, keys, keys, lazyRelationshipLoaded, put, remove, resetCacheKey, setCacheKeys

Methods inherited from class org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap

acquireDeferredLock, acquireLock, acquireLockNoWait, acquireLockWithWait, acquireReadLockOnCacheKey, acquireReadLockOnCacheKeyNoWait, containsKey, get, getAllCacheKeysFromIdentityMapWithEntityPK, getAllFromIdentityMapWithEntityPK, getCacheKeyForLock, getCacheKeyWithReadLock, getDefaultIdentityMapClass, getDescriptor, getDescriptorClass, getMaxSize, getWrapper, getWriteLockValue, release, remove, setDescriptor, setMaxSize, setWrapper, setWriteLockValue, toString, updateMaxSize

Methods inherited from class java.lang.Object

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

Constructor Detail

SoftIdentityMap

public SoftIdentityMap(int size,
                       ClassDescriptor descriptor,
                       AbstractSession session,
                       boolean isIsolated)

Method Detail

createCacheKey

public CacheKey createCacheKey(java.lang.Object primaryKey,
                               java.lang.Object object,
                               java.lang.Object writeLockValue,
                               long readTime)

Description copied from class: AbstractIdentityMap

Create the correct type of CacheKey for this map.

Overrides:

createCacheKey in class WeakIdentityMap