Module org.eclipse.persistence.core
Package org.eclipse.persistence.internal.identitymaps
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Interface Summary Interface Description IdentityMap Purpose: Provides the interface for IdentityMap interaction. -
Class Summary Class Description AbstractIdentityMap Purpose: Caches objects, and allows their retrieval by their primary key.AbstractIdentityMapEnumeration<T> AbstractEnumeration
interface implementation forIdentityMap
interface.CacheId Defines a wrapper for a primary key (Id) to use as a key in the cache.CacheIdentityMap Purpose: A fixed size LRU cacheCacheKey Purpose: Container class for storing objects in an IdentityMap.FullIdentityMap Purpose: A FullIdentityMap holds all objects stored within it for the life of the application.HardCacheWeakIdentityMap Purpose: A HardCacheWeakIdentityMap is identical to the weak identity map, however the weak reference can be a performance problem for some types of apps because it can cause too much garbage collection of objects read causing them to be re-read and re-built (this defeats the purpose of the cache).IdentityMapEnumeration IdentityMapKeyEnumeration Allows to iterate overCacheKey
instances stored in theIdentityMap
.IdentityMapManager Purpose: Maintain identity maps for domain classes mapped with EclipseLink.LinkedCacheKey Purpose: Provides the capability to insert CacheKeys into a Linked List.NoIdentityMap Purpose: Provide the capability to not cache objects at all.QueueableWeakCacheKey SoftCacheKey Purpose: Container class for storing objects in an IdentityMap.SoftCacheWeakIdentityMap Purpose: A SoftCacheWeakIdentityMap is identical to the WeakIdentityMap, however the weak reference can be a performance problem for some types of apps because it can cause too much garbage collection of objects read causing them to be re-read and re-built (this defeats the purpose of the cache).SoftIdentityMap Purpose: A SoftIdentityMap holds all objects referenced by the application.UnitOfWorkIdentityMap Unit of work specific identity map which avoid additional overhead not required in unit of work, such as locking and synchronization.WeakCacheKey Purpose: Container class for storing objects in an IdentityMap.WeakIdentityMap Purpose: A WeakIdentityMap holds all objects referenced by the application only.WeakUnitOfWorkIdentityMap